configure

#!/bin/sh
#
# configure -- custom configure script for ScummVM.
#
# ScummVM is the legal property of its developers, whose names
# are too numerous to list here. Please refer to the COPYRIGHT
# file distributed with this source distribution.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#

# NLS nuisances.
LC_ALL=C
export LC_ALL
LANGUAGE=C
export LANGUAGE

# Save the current environment variables for next runs
SAVED_CONFIGFLAGS=$@
SAVED_AR=$AR
SAVED_AS=$AS
SAVED_ASFLAGS=$ASFLAGS
SAVED_CPPFLAGS=$CPPFLAGS
SAVED_CXX=$CXX
SAVED_CXXFLAGS=$CXXFLAGS
SAVED_DWP=$DWP
SAVED_LD=$LD
SAVED_LDFLAGS=$LDFLAGS
SAVED_PKG_CONFIG_LIBDIR=${PKG_CONFIG_LIBDIR:-unset}
SAVED_RANLIB=$RANLIB
SAVED_SDL_CONFIG=$SDL_CONFIG
SAVED_STRIP=$STRIP
SAVED_WINDRES=$WINDRES
SAVED_WINDRESFLAGS=$WINDRESFLAGS

# Use environment vars if set
CXXFLAGS="$CXXFLAGS $CPPFLAGS"

# Backslashes into forward slashes:
# The following OS/2 specific code is performed to deal with handling of backslashes by ksh.
# Borrowed from the Sane configure script

if test "$ac_emxsupport" != "no" -a "$ac_emxsupport" != "NO"; then
	ac_save_IFS="$IFS"
	IFS="\\"
	ac_TEMP_PATH=
	for ac_dir in $PATH; do
		IFS=$ac_save_IFS
		if test -z "$ac_TEMP_PATH"; then
			ac_TEMP_PATH="$ac_dir"
		else
			ac_TEMP_PATH="$ac_TEMP_PATH/$ac_dir"
		fi
	done
	PATH="$ac_TEMP_PATH"
	export PATH
	unset ac_TEMP_PATH
fi

set_var() {
	eval ${1}='${2}'
}

get_var() {
	eval echo \$${1}
}

append_var() {
	VAR=${1}
	shift
	if eval test -z \"\$${VAR}\" ; then
		eval ${VAR}='$@'
	else
		eval ${VAR}=\"\$${VAR} \"'$@'
	fi
}

prepend_var() {
	VAR=${1}
	shift
	if eval test -z \"\$${VAR}\" ; then
		eval ${VAR}='$@'
	else
		eval ${VAR}='$@'\" \$${VAR}\"
	fi
}

# Add an engine: id name build subengines base-games dependencies
add_engine() {
	_engines="${_engines} ${1}"
	if test "${3}" = "no" ; then
		set_var _wip_engines "${_wip_engines} ${1}"
	fi
	set_var _engine_${1}_name "${2}"
	set_var _engine_${1}_build "${3}"
	set_var _engine_${1}_build_default "${3}"
	set_var _engine_${1}_subengines "${4}"
	set_var _engine_${1}_base "${5}"
	set_var _engine_${1}_deps "${6}"
	for sub in ${4}; do
		set_var _engine_${sub}_sub "yes"
		set_var _engine_${sub}_parent "${1}"
	done
}

# Add a feature: id name settings-list
add_feature() {
	set_var _feature_${1}_name "${2}"
	# This is a list of settings, where one must be "yes" for the feature to
	# be enabled
	set_var _feature_${1}_settings "${3}"
}

_srcdir=`dirname $0`

# Read list of engines
for i in $_srcdir/engines/*/configure.engine; do
	. "$i"
done

#
# Default settings
#
#ResidualVM defaults: sdlnet=no libcurl=no flac=no seq_midi=no sndio=no timidity=no
# a52=no theoradec=no faad=no fluidsynth=no mt32emu=no lua=no build_scalers=no
# build_hq_scalers=no nuked_opl=no tts=no osxdockplugin=no
#
# Default lib behavior yes/no/auto
_sdl=no
_ogg=auto
_vorbis=auto
_sdlnet=no
_libcurl=no
_tremor=auto
_tremolo=no
_flac=no
_mad=auto
_opl2lpt=no
_alsa=auto
_seq_midi=no
_sndio=no
_timidity=no
_zlib=auto
_mpeg2=auto
_a52=no
_sparkle=auto
_osxdockplugin=no
_jpeg=auto
_png=auto
_theoradec=no
_faad=no
_fluidsynth=no
_glew=auto
_opengl_mode=auto
_opengl=auto
_opengles=no
_opengles2=no
_opengl_shaders=auto
_readline=auto
_freetype2=auto
_taskbar=auto
_updates=no
_libunity=auto
_dialogs=auto
_iconv=auto
_tts=no
_gtk=auto
_fribidi=auto
# Default option behavior yes/no
_debug_build=auto
_release_build=auto
_optimizations=auto
_use_cxx11=no
_verbose_build=no
_text_console=no
_mt32emu=no
_lua=no
_build_scalers=no
_build_hq_scalers=no
_enable_prof=no
_enable_asan=no
_global_constructors=no
_no_undefined_var_template=no
_no_pragma_pack=no
_bink=yes
_cloud=no
_pandoc=no
# Default vkeybd/eventrec options
_vkeybd=no
_eventrec=no
# GUI translation options
_translation=yes
# Default platform settings
_backend=sdl
_16bit=auto
_highres=auto
_savegame_timestamp=auto
_dynamic_modules=no
_elf_loader=no
_plugins_default=static
_plugin_prefix=
_plugin_suffix=
_nasm=auto
_optimization_level=
_default_optimization_level=-O2
_nuked_opl=no
# Default commands
_ranlib=ranlib
_strip=strip
_ar="ar cru"
_as="as"
_dwp=dwp
_windres=windres
_stagingpath="staging"
_win32path="c:/residualvm"
_amigaospath="Games:ResidualVM"
_staticlibpath=
_xcodetoolspath=
_sparklepath=
_pkgconfig=pkg-config
_sdlconfig=sdl2-config
_libcurlconfig=curl-config
_freetypeconfig=freetype-config
_freetype_found="false"
_sdlpath="$PATH"
_freetypepath="$PATH"
_libcurlpath="$PATH"
_nasmpath="$PATH"
NASMFLAGS=""
NASM=""
_tainted_build=no
PANDOC=""
_pandocpath="$PATH"
_pandocformat="default"
_pandocext="default"
# The following variables are automatically detected, and should not
# be modified otherwise. Consider them read-only.
_posix=no
_has_posix_spawn=no
_endian=unknown
_need_memalign=yes
_have_x86=no

# Add (virtual) features
add_feature 16bit "16bit color" "_16bit"
add_feature bink "Bink" "_bink"
add_feature cloud "cloud" "_cloud"
add_feature faad "libfaad" "_faad"
add_feature flac "FLAC" "_flac"
add_feature freetype2 "FreeType2" "_freetype2"
add_feature highres "high resolution" "_highres"
add_feature mad "MAD" "_mad"
add_feature jpeg "JPEG" "_jpeg"
add_feature opengl_shaders "OpenGL with shaders" "_opengl_shaders" #ResidualVM specific
add_feature png "PNG" "_png"
add_feature theoradec "libtheoradec" "_theoradec"
add_feature vorbis "Vorbis file support" "_vorbis _tremor"
add_feature zlib "zlib" "_zlib"
add_feature lua "lua" "_lua"
add_feature fribidi "FriBidi" "_fribidi"

# Directories for installing ScummVM.
# This list is closely based on what GNU autoconf does,
# although the default value for datadir differs.
# Like GNU autoconf, we distinguish datadir and datarootdir
# to make it possible to change e.g. the location of the
# man pages independently of that of the engine data files,
# which are placed inside $datadir/residualvm
prefix=NONE
exec_prefix=NONE
bindir='${exec_prefix}/bin'
libdir='${exec_prefix}/lib'
datarootdir='${prefix}/share'
datadir='${datarootdir}/residualvm'
mandir='${datarootdir}/man'
docdir='${datarootdir}/doc/residualvm'
#localedir='${datarootdir}/locale'

# For cross compiling
_host=""
_host_cpu=""
_host_vendor=""
_host_os=""
_host_alias=""

_port_mk="ports.mk"

# Use temp files in the build directory
TMPO=./residualvm-conf
TMPC=${TMPO}.cpp
TMPLOG=config.log

cc_check_no_clean() {
	echo >> "$TMPLOG"
	cat "$TMPC" >> "$TMPLOG"
	echo >> "$TMPLOG"
	echo "$CXX $LDFLAGS $CXXFLAGS $TMPC -o $TMPO$HOSTEXEEXT $@" >> "$TMPLOG"
	rm -f "$TMPO$HOSTEXEEXT"
	if test "-c" = "$*" ; then
		( $CXX $CXXFLAGS "$TMPC" -o "$TMPO$HOSTEXEEXT" "$@" ) >> "$TMPLOG" 2>&1
	else
		( $CXX $LDFLAGS $CXXFLAGS "$TMPC" -o "$TMPO$HOSTEXEEXT" "$@" ) >> "$TMPLOG" 2>&1
	fi
	TMPR="$?"
	echo "return code: $TMPR" >> "$TMPLOG"
	echo >> "$TMPLOG"
	return "$TMPR"
}

cc_check_clean() {
	rm -rf $TMPC $TMPO $TMPO.o $TMPO.dwo $TMPO.dSYM $TMPO$HOSTEXEEXT "$@"
}

cc_check() {
	cc_check_no_clean "$@"
	TMPR="$?"
	cc_check_clean
	return "$TMPR"
}

cc_check_define() {
cat > $TMPC << EOF
int main(void) {
	#ifndef $1
	syntax error
	#endif
	return 0;
}
EOF
	cc_check -c
	return $?
}

gcc_get_define() {
	echo "" | $CXX -dM -E - | fgrep "$1" | head -n1 | cut -d ' ' -f 3-
}

#
# Function to provide echo -n for bourne shells that don't have it
#
echo_n() {
	printf "$@"
}

echocheck() {
	echo_n "Checking for $@... "
}

# Add a line of data to config.mk.
add_line_to_config_mk() {
	_config_mk_data="$_config_mk_data"'
'"$1"
}

# Add a line of data to config.h.
add_line_to_config_h() {
	_config_h_data="$_config_h_data"'
'"$1"
}

# Conditionally add a line of data to config.h. Takes two parameters:
# The first one can be set to 'no' to "comment out" the line, i.e.
# make it ineffective, use 'yes' otherwise.
# The second param is the line to insert.
add_to_config_h_if_yes() {
	if test "$1" = yes ; then
		add_line_to_config_h "$2"
	else
		add_line_to_config_h "/* $2 */"
	fi
}

# Conditionally add a line of data to config.mk. Takes two parameters:
# The first one can be set to 'no' to "comment out" the line, i.e.
# make it ineffective, use 'yes' otherwise.
# The second param is the line to insert.
add_to_config_mk_if_yes() {
	if test "$1" = yes ; then
		add_line_to_config_mk "$2"
	else
		add_line_to_config_mk "# $2"
	fi
}

# Conditionally add a '#define' line to config.h. Takes two parameters:
# The first one can be set to 'yes' or 'no'. If 'yes' is used, then
# the line "#define $2" is added to config.h, otherwise "#undef $2".
define_in_config_h_if_yes() {
	if test "$1" = yes ; then
		add_line_to_config_h "#define $2"
	else
		add_line_to_config_h "#undef $2"
	fi
}

# Conditionally add definitions to config.h and config.mk. Takes two parameters:
# The first one can be set to 'yes' or 'no'. If 'yes' is used, then
# the line "#define $2" is added to config.h and "$2 = 1" to config.mk.
# Otherwise "#undef $2" is added to config.h and "# $2 = 1" to config.mk
define_in_config_if_yes() {
	if test "$1" = yes ; then
		add_line_to_config_h "#define $2"
		add_line_to_config_mk "$2 = 1"
	else
		add_line_to_config_h "#undef $2"
		add_line_to_config_mk "# $2 = 1"
	fi
}

define_in_config_if_no() {
	if test "$1" = no ; then
		add_line_to_config_h "#define $2"
		add_line_to_config_mk "$2 = 1"
	else
		add_line_to_config_h "#undef $2"
		add_line_to_config_mk "# $2 = 1"
	fi
}

#
# Determine sdl-config
#
# TODO: small bit of code to test sdl usability
find_sdlconfig() {
	echo_n "Looking for sdl-config... "
	sdlconfigs="$SDL_CONFIG:$_sdlconfig:sdl2-config:sdl12-config:sdl11-config:sdl-config"
	_sdlconfig=

	IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="$SEPARATOR"
	for path_dir in $_sdlpath; do
		#reset separator to parse sdlconfigs
		IFS=":"
		for sdlconfig in $sdlconfigs; do
			if test -f "$path_dir/$sdlconfig" ; then
				_sdlconfig="$path_dir/$sdlconfig"
				echo $_sdlconfig
				# Save the prefix
				_sdlpath=$path_dir
				if test `basename $path_dir` = bin ; then
					_sdlpath=`dirname $path_dir`
				fi
				# break at first sdl-config found in path
				break 2
			fi
		done
	done

	IFS="$ac_save_ifs"

	if test -z "$_sdlconfig"; then
		echo "none found!"
		exit 1
	fi
}

#
# Determine freetype-config
#
find_freetypeconfig() {
	echo_n "Looking for freetype-config... "
	freetypeconfigs="$_freetypeconfig"
	_freetypeconfig=

	IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="$SEPARATOR"
	for path_dir in $_freetypepath; do
		#reset separator to parse freetypeconfigs
		IFS=":"
		for freetypeconfig in $freetypeconfigs; do
			if test -f "$path_dir/$freetypeconfig" ; then
				_freetypeconfig="$path_dir/$freetypeconfig"
				echo $_freetypeconfig
				# Save the prefix
				_freetypepath=$path_dir
				if test `basename $path_dir` = bin ; then
					_freetypepath=`dirname $path_dir`
				fi
				# break at first freetype-config found in path
				break 2
			fi
		done
	done

	IFS="$ac_save_ifs"

	if test -z "$_freetypeconfig"; then
		echo "none found!"
	fi
}

#
# Determine curl-config
#
find_libcurlconfig() {
	echo_n "Looking for curl-config... "
	libcurlconfigs="$_libcurlconfig"
	_libcurlconfig=

	IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="$SEPARATOR"
	for path_dir in $_libcurlpath; do
		#reset separator to parse sdlconfigs
		IFS=":"
		for libcurlconfig in $libcurlconfigs; do
			if test -f "$path_dir/$libcurlconfig" ; then
				_libcurlconfig="$path_dir/$libcurlconfig"
				echo $_libcurlconfig
				# Save the prefix
				_libcurlpath=$path_dir
				if test `basename $path_dir` = bin ; then
					_libcurlpath=`dirname $path_dir`
				fi
				# break at first curl-config found in path
				break 2
			fi
		done
	done

	IFS="$ac_save_ifs"

	if test -z "$_libcurlconfig"; then
		echo "none found!"
	fi
}

#
# Determine extension used for executables
#
get_system_exe_extension() {
	case $1 in
	riscos)
		_exeext=",e1f"
		;;
	3ds | dreamcast | ds | gamecube | n64 | ps2 | psp | switch | wii)
		_exeext=".elf"
		;;
	gph-linux)
		_exeext=".gph"
		;;
	mingw* | *os2-emx)
		_exeext=".exe"
		;;
	*)
		_exeext=""
		;;
	esac
}

#
# Generic options functions
#

# Show the configure help line for an option
option_help() {
	if test "${3}" != "" ; then
		tmpopt_prefix="${3}"
	else
		tmpopt_prefix="--"
	fi
	tmpopt=`echo $1 | sed 's/_/-/g'`
	option=`echo "${tmpopt_prefix}${tmpopt}                       " | sed "s/\(.\{23\}\).*/\1/"`
	echo "  ${option}  ${2}"
}

# Show an error about an unknown option
option_error() {
	echo "error: unrecognized option: $ac_option
Try \`$0 --help' for more information." >&2
	exit 1
}

# Show an error about an unknown engine
engine_option_error() {
	echo "error: unrecognized engine: $1
Try \`$0 --help' for more information." >&2
	exit 1
}

# Show an error about an invalid subengine option
subengine_option_error() {
	echo "error: this option is invalid for the subengine $1: $ac_option
Try \`$0 --help' for more information." >&2
	exit 1
}


#
# Feature handling functions
#

# Get the name of the feature
get_feature_name() {
	get_var _feature_$1_name
}

# Check whether the feature is enabled
get_feature_state() {
	for i in `get_var _feature_$1_settings`; do
		if test `get_var $i` = "yes"; then
			echo "yes"
			return
		fi
	done
	echo "no"
}


#
# Engine handling functions
#

# Get the name of the engine
get_engine_name() {
	get_var _engine_$1_name
}

# Will this engine be built?
get_engine_build() {
	get_var _engine_$1_build
}

# Was this engine set to be built by default?
get_engine_build_default() {
	get_var _engine_$1_build_default
}

# Get the subengines
get_engine_subengines() {
	get_var _engine_$1_subengines
}

# Get the dependencies
get_engine_dependencies() {
	get_var _engine_$1_deps
}

# Get the base engine game support description
get_engine_base() {
	get_var _engine_$1_base
}

# Ask if this is a subengine
get_engine_sub() {
	sub=`get_var _engine_$1_sub`
	if test -z "$sub" ; then
		sub=no
	fi
	echo $sub
}

# Get a subengine's parent (undefined for non-subengines)
get_subengine_parent() {
	get_var _engine_$1_parent
}

# Enable *all* engines
engine_enable_all() {
	for engine in $_engines; do
		set_var _engine_${engine}_build "yes"
	done
}

# Disable *all* engines
engine_disable_all() {
	for engine in $_engines; do
		set_var _engine_${engine}_build "no"
	done
}

# Enable all unstable engines
engine_enable_all_unstable() {
	for engine in $_engines; do
		engine_build_default=`get_engine_build_default $engine`
		if test $engine_build_default = no ; then
			set_var _engine_${engine}_build "yes"
		fi
	done
}

# Disable all unstable engines
engine_disable_all_unstable() {
	for engine in $_engines; do
		engine_build_default=`get_engine_build_default $engine`
		if test $engine_build_default = no ; then
			set_var _engine_${engine}_build "no"
		fi
	done
}

# Enable the given engine
engine_enable() {
	# Get the parameter
	if ( echo $1 | grep ':' ) 2> /dev/null > /dev/null ; then
		eng=`echo $1 | cut -d ':' -f 1`
		opt=`echo $1 | cut -d ':' -f 2`
	else
		eng=$1
		opt=yes
	fi
	engine=`echo $eng | sed 's/-/_/g'`

	# Filter the parameter for the subengines
	if test "`get_engine_sub ${engine}`" != "no" ; then
		if test "$opt" != "yes" ; then
			subengine_option_error ${engine}
			return
		fi
		parent=`get_subengine_parent ${engine}`
		if test `get_engine_build ${parent}` = "no" ; then
			set_var _engine_${parent}_build "yes"
		fi
	fi

	if test "$opt" = "static" -o "$opt" = "dynamic" -o "$opt" = "yes" ; then
		if test "`get_engine_name ${engine}`" != "" ; then
			set_var _engine_${engine}_build "$opt"
		else
			engine_option_error ${engine}
		fi
	else
		option_error
	fi
}

# Disable the given engine
engine_disable() {
	# Filter malformed options
	if ( echo $1 | grep '=' ) 2> /dev/null > /dev/null ; then
		option_error
		return
	fi

	engine=`echo $1 | sed 's/-/_/g'`
	if test "`get_engine_name ${engine}`" != "" ; then
		set_var _engine_${engine}_build "no"
	else
		engine_option_error ${engine}
	fi
}

# Check whether the engine's dependencies are met
# If that is not the case disable the engine
check_engine_deps() {
	unmet_deps=""

	# Check whether the engine is enabled
	if test `get_engine_build $1` != "no" ; then
		# Collect unmet dependencies
		for dep in `get_engine_dependencies $1`; do
			if test `get_feature_state $dep` = "no"; then
				feature_name=`get_feature_name $dep`
				unmet_deps="${unmet_deps}${feature_name} "
			fi
		done

		# Check whether there is any unmet dependency
		if test -n "$unmet_deps"; then
			echo "WARNING: Disabling engine "`get_engine_name $1`" because the following dependencies are unmet: "$unmet_deps
			engine_disable $1
		fi
	fi
}

# Show the configure help line for a given engine
show_engine_help() {
	name=`get_engine_name $1`
	option_help "${1}" "${name} engine" "  "
	for sub in `get_engine_subengines $1`; do
		show_subengine_help $sub $1
	done
}

# Show the configure help line for a given subengine
show_subengine_help() {
	name=`get_engine_name $1`
	parent=`get_engine_name $2`
	option_help "- ${1}" "${name} in ${parent} engine" "  "
}

# Prepare the strings about the engines to build
prepare_engine_build_strings() {
	string=`get_engine_build_string $1 static`
	if test -n "$string" ; then
		_engines_built_static="${_engines_built_static}#$string@"
	fi

	string=`get_engine_build_string $1 dynamic`
	if test -n "$string" ; then
		_engines_built_dynamic="${_engines_built_dynamic}#$string@"
	fi

	string=`get_engine_build_string $1 no`
	if test -n "$string" ; then
		_engines_skipped="${_engines_skipped}#$string@"
	fi

	string=`get_engine_build_string $1 wip`
	if test -n "$string" ; then
		_engines_built_wip="${_engines_built_wip}#$string@"
	fi

}

# Get the string about building an engine
get_engine_build_string() {
	engine=$1
	request_status=$2
	engine_string=""
	engine_build=`get_engine_build $1`
	engine_build_default=`get_engine_build_default $engine`
	show=no

	# Convert static/dynamic to yes to ease the check of subengines
	if test $engine_build = no; then
		subengine_filter=no
	else
		subengine_filter=yes
	fi

	# Check if the current engine should be shown for the current status
	if test $engine_build = $request_status ; then
		show=yes
	else
		# Test for disabled sub-engines
		if test $request_status = no ; then
			for subeng in `get_engine_subengines $engine` ; do
				if test `get_engine_build $subeng` = no ; then
					# In this case we to display _disabled_ subengines
					subengine_filter=no
					show=yes
				fi
			done
		fi
		# Test for enabled wip sub-engines
		if test $request_status = wip ; then
			for subeng in `get_engine_subengines $engine` ; do
				if test `get_engine_build $subeng` != no -a `get_engine_build_default $subeng` = no ; then
					show=yes
				fi
			done
		fi
	fi


	# Check if it is a wip engine
	if test "$request_status" = "wip" -a "$engine_build" != "no" -a  "$engine_build_default" = no; then
		show=yes
	fi

	# The engine should be shown, build the string
	if test $show = yes ; then
		engine_string=`get_subengines_build_string $engine $subengine_filter $request_status`
		engine_string="`get_engine_name $engine` $engine_string"
	fi

	echo "$engine_string"
}

# Get the string about building subengines
get_subengines_build_string() {
	parent_engine=$1
	subengine_filter=$2
	request_status=$3
	parent_engine_build_default=`get_engine_build_default $parent_engine`
	subengine_string=""

	# If the base engine isn't built at all, no need to list subengines
	# in any of the possible categories.
	if test `get_engine_build $parent_engine` = no; then
		return
	fi

	all=yes
	# If there are no subengines, never display "[all games]" (for brevity).
	if test -z "`get_engine_subengines $parent_engine`"; then
		all=no
	fi
	# If the base engine does not fit the category we're displaying here
	# (WIP or Skipped), we should never show "[all games]"
	if test "$request_status" = wip; then
		if test $parent_engine_build_default = yes; then
			all=no
		fi
	fi
	if test "$request_status" = no; then
		# If we're here, the parent engine is built, so no need to check that.
		all=no
	fi


	# In the static/dynamic categories, also display the engine's base games.
	if test -n "`get_engine_subengines $parent_engine`" -a $request_status != no -a $request_status != wip; then
		subengine_string="[`get_engine_base $parent_engine`]"
	fi

	for subeng in `get_engine_subengines $parent_engine` ; do
		subengine_build=`get_engine_build $subeng`
		subengine_build_default=`get_engine_build_default $subeng`

		# Display this subengine if it matches the filter, unless it is
		# a stable subengine in the WIP request.
		if test $subengine_build = $subengine_filter -a \! \( "$request_status" = wip -a "$subengine_build_default" = yes \) ; then
			s="[`get_engine_name $subeng`]"
			if test -n "$subengine_string"; then
				subengine_string="$subengine_string $s"
			else
				subengine_string="$s"
			fi
		else
			all=no
		fi
	done

	# Summarize the full list, where applicable
	if test $all = yes ; then
		subengine_string="[all games]"
	fi

	echo "$subengine_string"
}

#
# Check any parameters we received
#
# TODO:
# * Change --disable-mad / --enable-mad to the way it's done in autoconf:
#  That is, --without-mad / --with-mad=/prefix/to/mad. Useful for people
#  who have Mad/Vorbis/ALSA installed in a non-standard locations.
#

for parm in "$@" ; do
	if test "$parm" = "--help" || test "$parm" = "-help" || test "$parm" = "-h" ; then
		for engine in $_engines; do
			if test `get_engine_sub $engine` = no ; then
				engines_help="$engines_help`show_engine_help $engine`
"
			fi
		done
		cat << EOF

Usage: $0 [OPTIONS]...

Configuration:
  -h, --help              display this help and exit
  --backend=BACKEND       backend to build (android, sdl) [sdl]

Installation directories:
  --prefix=PREFIX         install architecture-independent files in PREFIX
                          [/usr/local]
  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                          [PREFIX]

By default, \`make install' will install all the files in
\`/usr/local/bin', \`/usr/local/lib' etc.  You can specify
an installation prefix other than \`/usr/local' using \`--prefix',
for instance \`--prefix=\$HOME'.

For better control, use the options below.

Fine tuning of the installation directories:
  --bindir=DIR            user executables [EPREFIX/bin]
  --libdir=DIR            object code libraries [EPREFIX/lib]
  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
  --datadir=DIR           read-only architecture-independent data
                          [DATAROOTDIR/residualvm]
  --mandir=DIR            man documentation [DATAROOTDIR/man]
  --docdir=DIR            documentation root [DATAROOTDIR/doc/residualvm]

Special configuration feature:
  --host=HOST             cross-compile to target HOST (arm-linux, ...)
                          special targets: android-arm for Android ARM
                                           android-x86 for Android x86
                                           ps3 for PlayStation 3

Game engines:
  --enable-all-engines     enable all engines, including those which are
                           broken or unsupported
  --disable-all-engines    disable all engines
  --enable-all-unstable-engines     enable the engines which are
                                    broken or unsupported
  --disable-all-unstable-engines    disable only the engines which are
                                    broken or unsupported
  --enable-engine=<engine name>[,<engine name>...] enable engine(s) listed
  --disable-engine=<engine name>[,<engine name>...] disable engine(s) listed
  --enable-engine-static=<engine name>[,<engine name>...]
      enable engine(s) listed as static builtin (when plugins are enabled)
  --enable-engine-dynamic=<engine name>[,<engine name>...]
      enable engine(s) listed as dynamic plugin (when plugins are enabled)
    The values of <engine name> for these options are as follows:
$engines_help
Optional Features:
  --enable-static          build a static binary instead of using shared objects
  --enable-c++11           build as C++11 if the compiler allows that
  --disable-debug          disable building with debugging symbols
  --enable-Werror          treat warnings as errors
  --enable-release         enable building in release mode (this activates
                           optimizations)
  --enable-release-mode    enable building in release mode (without optimizations)
  --enable-optimizations   enable optimizations
  --enable-asan            enable Address Sanitizer for memory-related debugging
  --enable-profiling       enable profiling
  --enable-plugins         enable the support for dynamic plugins
  --default-dynamic        make plugins dynamic by default
  --disable-savegame-timestamp don't use timestamps for blank savegame descriptions
  --disable-translation    don't build support for translated messages
  --disable-taskbar        don't build support for taskbar and launcher integration
  --disable-cloud          don't build cloud support
  --disable-system-dialogs don't build support for system dialogs
  --enable-vkeybd          build virtual keyboard support
  --enable-eventrecorder   enable event recording functionality
  --disable-eventrecorder  disable event recording functionality
  --enable-updates         build support for updates
  --enable-text-console    use text console instead of graphical console
  --enable-verbose-build   enable regular echoing of commands during build
                           process
  --enable-tts             build support for text to speech
  --disable-tts            don't build support for text to speech
  --disable-bink           don't build with Bink video support

Optional Libraries:
  --with-alsa-prefix=DIR   prefix where alsa is installed (optional)
  --disable-alsa           disable ALSA midi sound support [autodetect]

  --with-ogg-prefix=DIR    prefix where libogg is installed (optional)
  --disable-ogg            disable Ogg support [autodetect]

  --with-vorbis-prefix=DIR prefix where libvorbis is installed (optional)
  --disable-vorbis         disable Vorbis support [autodetect]

  --with-tremor-prefix=DIR prefix where tremor is installed (optional)
  --disable-tremor         disable tremor support [autodetect]

  --with-mad-prefix=DIR    prefix where libmad is installed (optional)
  --disable-mad            disable libmad (MP3) support [autodetect]

  --with-fribidi-prefix=DIR    prefix where libfribidi is installed
  --disable-fribidi            disable libfribidi support [autodetect]

  --with-flac-prefix=DIR   prefix where libFLAC is installed (optional)
  --disable-flac           disable FLAC support [autodetect]

  --with-zlib-prefix=DIR   prefix where zlib is installed (optional)
  --disable-zlib           disable zlib (compression) support [autodetect]

  --with-mpeg2-prefix=DIR  prefix where libmpeg2 is installed (optional)
  --enable-mpeg2           enable mpeg2 codec for cutscenes [autodetect]

  --with-a52-prefix=DIR    Prefix where liba52 is installed (optional)
  --enable-a52             enable a52 codec for MPEG decoder [autodetect]

  --with-opengl-prefix=DIR prefix where OpenGL (ES) is installed (optional)
  --disable-opengl         disable OpenGL (ES) support [autodetect]
  --disable-opengl-shaders disable use of modern OpenGL with shaders
  --force-opengles2        only detect OpenGL ES2

  --with-glew-prefix=DIR   prefix where GLEW is installed (optional)
  --disable-glew           disable GLEW support [autodetect]

  --with-jpeg-prefix=DIR   Prefix where libjpeg is installed (optional)
  --disable-jpeg           disable JPEG decoder [autodetect]

  --with-png-prefix=DIR    prefix where libpng is installed (optional)
  --disable-png            disable PNG decoder [autodetect]

  --with-theoradec-prefix=DIR  prefix where libtheoradec is installed (optional)
  --disable-theoradec      disable Theora decoder [autodetect]

  --with-faad-prefix=DIR   prefix where libfaad is installed (optional)
  --disable-faad           disable AAC decoder [autodetect]

  --with-fluidsynth-prefix=DIR prefix where libfluidsynth is
                           installed (optional)
  --disable-fluidsynth     disable fluidsynth MIDI driver [autodetect]

  --with-sparkle-prefix=DIR    prefix where sparkle is installed
                           (OS X/Windows only - optional)
  --disable-sparkle        disable sparkle automatic update support
                           [OS X/Windows only - autodetect]

  --disable-osx-dock-plugin    disable the NSDockTilePlugin support
                               [Mac OS X only - autodetect]

  --with-sdl-prefix=DIR    prefix where the SDL package is installed (optional)
                           e.g., if sdl-config script is at:
                           /opt/mxe/usr/i686-w64-mingw32.static/bin/sdl2-config
                           then you should pass:
                           '--with-sdl-prefix=/opt/mxe/usr/i686-w64-mingw32.static'

  --with-freetype2-prefix=DIR  prefix where the freetype-config script is
                               installed (optional)
  --disable-freetype2      disable freetype2 TTF library usage [autodetect]

  --with-nasm-prefix=DIR   prefix where nasm executable is installed (optional)
  --disable-nasm           disable assembly language optimizations [autodetect]

  --with-pandoc-format=FORMAT   pandoc format to use during the conversion (optional)

  --with-readline-prefix=DIR   prefix where readline is installed (optional)
  --disable-readline       disable readline support in text console [autodetect]

  --with-libunity-prefix=DIR   prefix where libunity is installed (optional)
  --disable-libunity       disable Unity launcher integration [autodetect]

  --with-gtk-prefix=DIR   prefix where gtk is installed (optional)
  --disable-gtk       disable GTK dialog integration [autodetect]

  --with-sndio-prefix=DIR  prefix where sndio is installed (optional)
  --disable-sndio          disable sndio MIDI driver [autodetect]

  --with-sdlnet-prefix=DIR prefix where SDL_Net is installed (optional)
  --disable-sdlnet         disable SDL_Net networking library [autodetect]

  --with-libcurl-prefix=DIR    prefix where libcurl is installed (optional)
  --disable-libcurl        disable libcurl networking library [autodetect]

  --with-iconv-prefix=DIR    prefix where libiconv is installed (optional)
  --disable-iconv        disable libiconv encoding conversion library [autodetect]

Some influential environment variables:
  AR                 archiver command
  AS                 assembler command
  ASFLAGS            assembler flags
  CONFIGURE_NO_HOST  Ignore the cross-compile target set by the --host= option
  CPPFLAGS           C++ preprocessor flags, e.g. -I<include dir> if you have
                     headers in a nonstandard directory <include dir>
  CXX                C++ compiler command
  CXXFLAGS           C++ compiler flags
  DWP                DWARF packing utility command
  LD                 linker command
  LDFLAGS            linker flags, e.g. -L<lib dir> if you have libraries in a
                     nonstandard directory <lib dir>
  PKG_CONFIG_LIBDIR  list of directories where pkg-config ‘.pc’ files are
                     looked up
  RANLIB             archive indexer command
  SDL_CONFIG         SDL configurer script name (not path)
  STRIP              symbol stripper command
  WINDRES            Windows resource compiler command
  WINDRESFLAGS       Windows resource compiler flags

EOF
		exit 0
	fi
done # for parm in ...


#
# If we're not showing help, greet the user and start the log file
#
echo "Running ResidualVM configure..."
echo "Configure run on" `date` > $TMPLOG
cat >> $TMPLOG <<EOF
Invocation command line was:
$0 $@
Saved environment variables:
AR="$SAVED_AR" AS="$SAVED_AS" ASFLAGS="$SAVED_ASFLAGS" CPPFLAGS="$SAVED_CPPFLAGS" CXX="$SAVED_CXX" CXXFLAGS="$SAVED_CXXFLAGS" DWP="$SAVED_DWP" LD="$SAVED_LD" LDFLAGS="$SAVED_LDFLAGS" PKG_CONFIG_LIBDIR="$SAVED_PKG_CONFIG_LIBDIR" RANLIB="$SAVED_RANLIB" SDL_CONFIG="$SAVED_SDL_CONFIG" STRIP="$SAVED_STRIP" WINDRES="$SAVED_WINDRES" WINDRESFLAGS="$SAVED_WINDRESFLAGS"
EOF


for ac_option in $@; do
	case "$ac_option" in
	# Silently ignore options valid for Autotools configure.
	--build=*)                                           ;;
	--program-prefix=*)                                  ;;
	--sbindir=*)                                         ;;
	--sysconfdir=*)                                      ;;
	--includedir=*)                                      ;;
	--libexecdir=*)                                      ;;
	--localstatedir=*)                                   ;;
	--sharedstatedir=*)                                  ;;
	--infodir=*)                                         ;;
	--disable-dependency-tracking)                       ;;
	--enable-dependency-tracking)                        ;;
	# End of ignored options.
	--enable-static)              _static_build=yes      ;;
#	--disable-16bit)              _16bit=no              ;; #ResidualVM: not supported
#	--enable-highres)             _highres=yes           ;; #ResidualVM: not supported
#	--disable-highres)            _highres=no            ;; #ResidualVM: not supported
	--disable-savegame-timestamp) _savegame_timestamp=no ;;
#	--disable-scalers)            _build_scalers=no      ;; #ResidualVM: not supported
#	--disable-hq-scalers)         _build_hq_scalers=no   ;; #ResidualVM: not supported
	--enable-alsa)                _alsa=yes              ;;
	--disable-alsa)               _alsa=no               ;;
	--enable-seq-midi)            _seq_midi=yes          ;;
	--disable-seq-midi)           _seq_midi=no           ;;
	--enable-sndio)               _sndio=yes             ;;
	--disable-sndio)              _sndio=no              ;;
	--enable-timidity)            _timidity=yes          ;;
	--disable-timidity)           _timidity=no           ;;
	--enable-ogg)                 _ogg=yes               ;;
	--disable-ogg)                _ogg=no                ;;
	--enable-vorbis)              _vorbis=yes            ;;
	--disable-vorbis)             _vorbis=no             ;;
	--enable-tremor)              _tremor=yes            ;;
	--disable-tremor)             _tremor=no             ;;
	--enable-opl2lpt)             _opl2lpt=yes           ;;
	--disable-opl2lpt)            _opl2lpt=no            ;;
	--enable-flac)                _flac=yes              ;;
	--disable-flac)               _flac=no               ;;
	--enable-mad)                 _mad=yes               ;;
	--disable-mad)                _mad=no                ;;
	--enable-fribidi)             _fribidi=yes           ;;
	--disable-fribidi)            _fribidi=no            ;;
	--enable-zlib)                _zlib=yes              ;;
	--disable-zlib)               _zlib=no               ;;
	--enable-sparkle)             _sparkle=yes           ;;
	--disable-sparkle)            _sparkle=no            ;;
	--enable-osx-dock-plugin)     _osxdockplugin=yes     ;;
	--disable-osx-dock-plugin)    _osxdockplugin=no      ;;
	--enable-nasm)                _nasm=yes              ;;
	--disable-nasm)               _nasm=no               ;;
	--enable-mpeg2)               _mpeg2=yes             ;;
	--disable-mpeg2)              _mpeg2=no              ;;
	--enable-a52)                 _a52=yes               ;;
	--disable-a52)                _a52=no                ;;
	--disable-jpeg)               _jpeg=no               ;;
	--enable-jpeg)                _jpeg=yes              ;;
	--disable-png)                _png=no                ;;
	--enable-png)                 _png=yes               ;;
	--disable-theoradec)          _theoradec=no          ;;
	--enable-theoradec)           _theoradec=yes         ;;
	--disable-faad)               _faad=no               ;;
	--enable-faad)                _faad=yes              ;;
	--disable-fluidsynth)         _fluidsynth=no         ;;
	--enable-readline)            _readline=yes          ;;
	--disable-readline)           _readline=no           ;;
	--enable-freetype2)           _freetype2=yes         ;;
	--disable-freetype2)          _freetype2=no          ;;
	--enable-taskbar)             _taskbar=yes           ;;
	--disable-taskbar)            _taskbar=no            ;;
	--enable-system-dialogs)      _dialogs=yes           ;;
	--disable-system-dialogs)     _dialogs=no            ;;
	--enable-sdlnet)              _sdlnet=yes            ;;
	--disable-sdlnet)             _sdlnet=no             ;;
	--enable-libcurl)             _libcurl=yes           ;;
	--disable-libcurl)            _libcurl=no            ;;
	--enable-cloud)               _cloud=yes             ;;
	--disable-cloud)              _cloud=no              ;;
	--enable-updates)             _updates=yes           ;;
	--disable-updates)            _updates=no            ;;
	--enable-libunity)            _libunity=yes          ;;
	--disable-libunity)           _libunity=no           ;;
	--enable-glew)                _glew=yes              ;; #ResidualVM specific option
	--disable-glew)               _glew=no               ;; #ResidualVM specific option
	--enable-opengl)              _opengl=yes            ;; #ResidualVM specific option
	--disable-opengl)             _opengl=no             ;; #ResidualVM specific option
	--enable-opengl-shaders)      _opengl_shaders=yes    ;; #ResidualVM specific option
	--disable-opengl-shaders).    _opengl_shaders=no     ;; #ResidualVM specific option
	--force-opengles2)            _opengles2=yes         ;; #ResidualVM specific option
	--enable-bink)                _bink=yes              ;;
	--disable-bink)               _bink=no               ;;
#	--opengl-mode=*)
#		_opengl_mode=`echo $ac_option | cut -d '=' -f 2`
#		;; #ResidualVM: not supported
	--enable-verbose-build)      _verbose_build=yes      ;;
	--enable-plugins)            _dynamic_modules=yes    ;;
	--default-dynamic)           _plugins_default=dynamic;;
#	--enable-mt32emu)            _mt32emu=yes            ;; #ResidualVM: not supported
#	--disable-mt32emu)           _mt32emu=no             ;; #ResidualVM: not supported
#	--enable-lua)                _lua=yes                ;; #ResidualVM: not supported
#	--disable-lua)               _lua=no                 ;; #ResidualVM: not supported
#	--enable-nuked-opl)          _nuked_opl=yes          ;; #ResidualVM: not supported
#	--disable-nuked-opl)         _nuked_opl=no           ;; #ResidualVM: not supported
	--enable-translation)        _translation=yes        ;;
	--disable-translation)       _translation=no         ;;
	--enable-vkeybd)             _vkeybd=yes             ;;
	--disable-vkeybd)            _vkeybd=no              ;;
#	--enable-eventrecorder)      _eventrec=yes           ;; #ResidualVM: not supported
#	--disable-eventrecorder)     _eventrec=no            ;; #ResidualVM: not supported
	--enable-text-console)       _text_console=yes       ;;
	--disable-text-console)      _text_console=no        ;;
	--enable-iconv)              _iconv=yes              ;;
	--disable-iconv)             _iconv=no               ;;
	--with-fluidsynth-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		FLUIDSYNTH_CFLAGS="-I$arg/include"
		FLUIDSYNTH_LIBS="-L$arg/lib"
		;;
	--with-mpeg2-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		MPEG2_CFLAGS="-I$arg/include"
		MPEG2_LIBS="-L$arg/lib"
		;;
	--with-a52-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		A52_CFLAGS="-I$arg/include"
		A52_LIBS="-L$arg/lib"
		;;
	--with-alsa-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		ALSA_CFLAGS="-I$arg/include"
		ALSA_LIBS="-L$arg/lib"
		;;
	--with-sndio-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		SNDIO_CFLAGS="-I$arg/include"
		SNDIO_LIBS="-L$arg/lib"
		;;
	--with-ogg-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		OGG_CFLAGS="-I$arg/include"
		OGG_LIBS="-L$arg/lib"
		;;
	--with-vorbis-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		VORBIS_CFLAGS="-I$arg/include"
		VORBIS_LIBS="-L$arg/lib"
		;;
	--with-tremor-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		TREMOR_CFLAGS="-I$arg/include"
		TREMOR_LIBS="-L$arg/lib"
		;;
#	--with-ieee1284-prefix=*) ;; #ResidualVM: not supported
#		arg=`echo $ac_option | cut -d '=' -f 2`
#		IEEE1284_CFLAGS="-I$arg/include"
#		IEEE1284_LIBS="-L$arg/lib"
#		;;
	--with-flac-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		FLAC_CFLAGS="-I$arg/include"
		FLAC_LIBS="-L$arg/lib"
		;;
	--with-mad-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		MAD_CFLAGS="-I$arg/include"
		MAD_LIBS="-L$arg/lib"
		;;
	--with-fribidi-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		FRIBIDI_CFLAGS="-I$arg/include"
		FRIBIDI_LIBS="-L$arg/lib"
		;;
	--with-jpeg-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		JPEG_CFLAGS="-I$arg/include"
		JPEG_LIBS="-L$arg/lib"
		;;
	--with-png-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		PNG_CFLAGS="-I$arg/include"
		PNG_LIBS="-L$arg/lib"
		;;
	--with-theoradec-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		THEORADEC_CFLAGS="-I$arg/include"
		THEORADEC_LIBS="-L$arg/lib"
		;;
	--with-faad-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		FAAD_CFLAGS="-I$arg/include"
		FAAD_LIBS="-L$arg/lib"
		;;
	--with-zlib-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		ZLIB_CFLAGS="-I$arg/include"
		ZLIB_LIBS="-L$arg/lib"
		;;
	--with-sparkle-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		_sparklepath=$arg
		;;
	--with-readline-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		READLINE_CFLAGS="-I$arg/include"
		READLINE_LIBS="-L$arg/lib"
		;;
	--with-libunity-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		LIBUNITY_CFLAGS="-I$arg/include"
		LIBUNITY_LIBS="-L$arg/lib"
		;;
	--with-gtk-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		GTK_CFLAGS="-I$arg/include"
		GTK_LIBS="-L$arg/lib"
		;;
	--with-sdlnet-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		SDL_NET_CFLAGS="-I$arg/include"
		SDL_NET_LIBS="-L$arg/lib"
		;;
#ResidualVM: specific option
	--with-opengl-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		OPENGL_CFLAGS="-I$arg/include"
		OPENGL_LIBS="-L$arg/lib"
		;;
#ResidualVM: specific option
	--with-glew-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		GLEW_CFLAGS="-I$arg/include"
		GLEW_LIBS="-L$arg/lib"
		;;
	--with-iconv-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		ICONV_CFLAGS="-I$arg/include"
		ICONV_LIBS="-L$arg/lib"
		;;
	--backend=*)
		_backend=`echo $ac_option | cut -d '=' -f 2`
		;;
	--enable-c++11)
		_use_cxx11=yes
		;;
	--disable-c++11)
		_use_cxx11=no
		;;
	--enable-debug)
		_debug_build=yes
		;;
	--disable-debug)
		_debug_build=no
		;;
	--enable-Werror)
		append_var CXXFLAGS "-Werror"
		;;
	--enable-release-mode)
		_release_build=yes
		;;
	--disable-release-mode)
		_release_build=no
		;;
	--enable-release)
		_release_build=yes
		_optimizations=yes
		_updates=yes
		;;
	--disable-release)
		_release_build=no
		_optimizations=no
		;;
	--enable-optimizations)
		_optimizations=yes
		;;
	--disable-optimizations)
		_optimizations=no
		;;
	--enable-profiling)
		_enable_prof=yes
		;;
	--enable-asan)
		_enable_asan=yes
		;;
	--with-sdl-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		_sdlpath="$arg:$arg/bin"
		;;
	--with-freetype2-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		_freetypepath="$arg:$arg/bin"
		;;
	--with-libcurl-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		_libcurlpath="$arg:$arg/bin"
		;;
	--with-nasm-prefix=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		_nasmpath="$arg:$arg/bin"
		;;
	--with-pandoc-format=*)
		arg=`echo $ac_option | cut -d '=' -f 2`
		_pandocformat="$arg"
		_pandoc=yes
		;;
	--with-staticlib-prefix=*)
		_staticlibpath=`echo $ac_option | cut -d '=' -f 2`
		;;
	--with-xcodetools-path=*)
		_xcodetoolspath=`echo $ac_option | cut -d '=' -f 2`
		;;
	--host=*)
		if test -z "$CONFIGURE_NO_HOST"; then
			_host=`echo $ac_option | cut -d '=' -f 2`
		else
			echo "Ignoring --host option!" >&2
		fi
		;;
	--prefix=*)
		prefix=`echo $ac_option | cut -d '=' -f 2`
		;;
	--exec-prefix=*)
		exec_prefix=`echo $ac_option | cut -d '=' -f 2`
		;;
	--bindir=*)
		bindir=`echo $ac_option | cut -d '=' -f 2`
		;;
	--libdir=*)
		libdir=`echo $ac_option | cut -d '=' -f 2`
		;;
	--datarootdir=*)
		datarootdir=`echo $ac_option | cut -d '=' -f 2`
		;;
	--datadir=*)
		datadir=`echo $ac_option | cut -d '=' -f 2`
		;;
	--mandir=*)
		mandir=`echo $ac_option | cut -d '=' -f 2`
		;;
	--docdir=*)
		docdir=`echo $ac_option | cut -d '=' -f 2`
		;;
	--enable-all-engines)
		engine_enable_all
		;;
	--disable-all-engines)
		engine_disable_all
		;;
	--enable-all-unstable-engines)
		engine_enable_all_unstable
		;;
	--disable-all-unstable-engines)
		engine_disable_all_unstable
		;;
	--enable-engine=* | --enable-engines=*)
		for engine_name in `echo $ac_option | cut -d '=' -f 2- | tr ',' '\n'`; do
			engine_enable "${engine_name}"
		done
		;;
	--enable-engine-static=* | --enable-engines-static=*)
		for engine_name in `echo $ac_option | cut -d '=' -f 2- | tr ',' '\n'`; do
			engine_enable "${engine_name}:static"
		done
		;;
	--enable-engine-dynamic=* | --enable-engines-dynamic=*)
		for engine_name in `echo $ac_option | cut -d '=' -f 2- | tr ',' '\n'`; do
			engine_enable "${engine_name}:dynamic"
		done
		;;
	--disable-engine=* | --disable-engines=*)
		for engine_name in `echo $ac_option | cut -d '=' -f 2 | tr ',' '\n'`; do
			engine_disable ${engine_name}
		done
		;;
	*)
		option_error
		;;
	esac;
done;

guessed_host=`$_srcdir/config.guess`
get_system_exe_extension $guessed_host
NATIVEEXEEXT=$_exeext

case $_host in
3ds)
	_host_os=3ds
	_host_cpu=arm
	_host_alias=arm-none-eabi

	test "x$prefix" = xNONE && prefix=romfs:

	datarootdir='${prefix}'
	datadir='${datarootdir}'
	docdir='${prefix}/doc'
	;;
android | android-arm | android-v7a | android-arm-v7a | ouya)
	_host_os=android
	_host_cpu=arm
	_host_alias=arm-linux-androideabi
	;;
android-arm64-v8a)
	_host_os=android
	_host_cpu=aarch64
	_host_alias=aarch64-linux-android
	;;
android-x86)
	_host_os=android
	_host_cpu=i686
	_host_alias=i686-linux-android
	;;
android-x86_64)
	_host_os=android
	_host_cpu=x86_64
	_host_alias=x86_64-linux-android
	;;
androidsdl-armeabi | androidsdl-armeabi-v7a)
	_host_os=androidsdl
	_host_cpu=arm
	_host_alias=arm-linux-androideabi
	;;
androidsdl-arm64-v8a)
	_host_os=androidsdl
	_host_cpu=aarch64
	_host_alias=aarch64-linux-android
	;;
androidsdl-mips)
	_host_os=androidsdl
	_host_cpu=mipsel
	_host_alias=mipsel-linux-android
	;;
androidsdl-x86)
	_host_os=androidsdl
	_host_cpu=i686
	_host_alias=i686-linux-android
	;;
androidsdl-x86_64)
	_host_os=androidsdl
	_host_cpu=x86_64
	_host_alias=x86_64-linux-android
	;;
arm-*riscos)
	_host_os=riscos
	_host_cpu=arm
	_host_alias=$_host
	datarootdir='/\<ResidualVM\$$Dir\>'
	datadir='${datarootdir}/data'
	docdir='${datarootdir}/docs'
	;;
raspberrypi)
	_host_os=linux
	_host_cpu=arm
	# This tuple is the one used by the official Rpi toolchain.
	# It may change in the future.
	_host_alias=arm-linux-gnueabihf
	;;
caanoo)
	_host_os=gph-linux
	_host_cpu=arm
	_host_alias=arm-none-linux-gnueabi
	;;
dingux | gcw0)
	_host_os=linux
	_host_cpu=mipsel
	_host_alias=mipsel-linux
	;;
dreamcast)
	_host_os=dreamcast
	_host_cpu=sh
	_host_alias=sh-elf
	append_var CXXFLAGS "-ml -m4-single-only"
	append_var LDFLAGS "-ml -m4-single-only"
	;;
ds)
	_host_os=ds
	_host_cpu=arm
	_host_alias=arm-none-eabi
	;;
gamecube)
	_host_os=gamecube
	_host_cpu=powerpc
	_host_alias=powerpc-eabi
	;;
gp2x)
	_host_os=gph-linux
	_host_cpu=arm
	_host_alias=arm-open2x-linux
	;;
gp2xwiz)
	_host_os=gph-linux
	_host_cpu=arm
	_host_alias=arm-open2x-linux
	;;
i586-mingw32msvc)
	_host_os=mingw32msvc
	_host_cpu=i586
	;;
iphone)
	_host_os=iphone
	_host_cpu=arm
	_host_alias=arm-apple-darwin9
	;;
ios7)
	_host_os=iphone
	_host_cpu=arm
	_host_alias=arm-apple-darwin11
	;;
maemo)
	_host_os=maemo
	_host_cpu=arm
	_host_alias=arm-none-linux-gnueabi

	# The prefix is always the same on Maemo so we hardcode the default
	# here. It is still possible to define a custom prefix which is
	# needed when packaging the app with a user-specific app ID.
	test "x$prefix" = xNONE && prefix=/opt/residualvm
	# Maemo apps are installed into app-specific directories. The
	# default directory structure of ScummVM makes no sense here so we
	# hardcode Maemo specific directories here.
	datarootdir='${prefix}/share'
	datadir=/opt/residualvm/share
	docdir='${datarootdir}/doc/residualvm'
	;;
n64)
	_host_os=n64
	_host_cpu=mips
	_host_alias=mips64
	;;
neuros)
	_host_os=linux
	_host_cpu=arm
	;;
openpandora)
	_host_os=linux
	_host_cpu=arm
	_host_alias=arm-angstrom-linux-gnueabi
	;;
ppc-amigaos)
	_host_os=amigaos
	_host_cpu=powerpc
	_host_alias=$_host
	;;
ps2)
	_host_os=ps2
	_host_cpu=mips64r5900el
	_host_alias=ee
	# PS2 bogus dirs: they actually depend on launch medium
	datadir='host:data'
	docdir='host:docs'
	;;
ps3)
	_host_os=ps3
	_host_cpu=powerpc
	_host_alias=powerpc64-ps3-elf

	# The prefix is always the same on PS3 so we hardcode the default
	# here. It is still possible to define a custom prefix which is
	# needed when packaging the app with a user-specific app ID.
	test "x$prefix" = xNONE && prefix=/dev_hdd0/game/RESI12000/USRDIR
	# PS3 apps are installed into app-specific directories. The
	# default directory structure of ScummVM makes no sense here so we
	# hardcode PS3 specific directories here.
	datarootdir='${prefix}/data'
	datadir='${datarootdir}'
	docdir='${prefix}/doc'
	;;
psp2)
	_host_os=psp2
	_host_cpu=arm
	_host_alias=arm-vita-eabi

	# The prefix is always the same on PSP2 so we hardcode the default
	# here. It is still possible to define a custom prefix which is
	# needed when packaging the app with a user-specific app ID.
	test "x$prefix" = xNONE && prefix=app0:
	# PSP2 apps are installed into app-specific directories. The
	# default directory structure of ScummVM makes no sense here so we
	# hardcode PSP2 specific directories here.
	datarootdir='${prefix}/data'
	datadir='${datarootdir}'
	docdir='${prefix}/doc'
	;;
psp)
	_host_os=psp
	_host_cpu=mipsallegrexel
	_host_alias=psp
	;;
samsungtv)
	_host_os=linux
	_host_cpu=arm
	_host_alias=arm-linux-gnueabi
	;;
switch)
	_host_os=switch
	_host_cpu=aarch64
	_host_alias=aarch64-none-elf
	test "x$prefix" = xNONE && prefix=.
	datarootdir='${prefix}/data'
	datadir='${datarootdir}'
	docdir='${prefix}/doc'
	;;
tizen)
 	_host_os=tizen
	_host_cpu=arm
	_host_alias=arm-linux-gnueabi
	;;
webos)
	_host_os=webos
	_host_cpu=arm
	_host_alias=arm-none-linux-gnueabi
	# The prefix is always the same on WebOS so we hardcode the default
	# here. It is still possible to define a custom prefix which is
	# needed when packaging the app with a user-specific app ID.
	test "x$prefix" = xNONE && prefix=/media/cryptofs/apps/usr/palm/applications/org.residualvm.residualvm
	# WebOS apps are installed into app-specific directories. The
	# default directory structure of ScummVM makes no sense here so we
	# hardcode WebOS specific directories here.
	datarootdir='${prefix}/data'
	datadir='${datarootdir}'
	docdir='${prefix}/doc'
	;;
wii)
	_host_os=wii
	_host_cpu=powerpc
	_host_alias=powerpc-eabi
	;;
*)
	if test -n "$_host"; then
		guessed_host=`$_srcdir/config.sub $_host`
	fi
	_host_cpu=`echo $guessed_host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
	_host_vendor=`echo $guessed_host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
	_host_os=`echo $guessed_host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
	;;
esac

if test -z "$_host_alias"; then
	_host_alias="$_host_cpu-$_host_os"
else
	# if _host_alias was set, default to the standard GNU tools
	_ranlib=$_host_alias-ranlib
	_strip=$_host_alias-strip
	_ar="$_host_alias-ar cru"
	_as="$_host_alias-as"
	_dwp=$_host_alias-dwp
	_windres=$_host_alias-windres
fi

case $_host in
arm-*riscos | caanoo | gp2x | gp2xwiz | openpandora | ps2 | psp | psp2 | switch)
	if test "$_debug_build" = auto; then
		# If you want to debug one of these platforms, use '--disable-optimizations --enable-debug'
		_debug_build=no
	fi

	if test "$_optimizations" = auto; then
		# Enable optimizations by default.
		_optimizations=yes
	fi
	;;
esac

#
# Determine extension used for executables
#
get_system_exe_extension $_host_os
HOSTEXEPRE=
HOSTEXEEXT=$_exeext

#
# Determine separator used for $PATH
#
case $_host_os in
os2-emx*)
	SEPARATOR=";"
	;;
*)
	SEPARATOR=":"
	;;
esac

#
# Platform specific sanity checks
#
case $_host_os in
android)
	if test -z "$ANDROID_SDK"; then
		echo "Please set ANDROID_SDK in your environment. export ANDROID_SDK=<path to Android SDK>"
 		exit 1
	fi
	if test -z "$ANDROID_NDK"; then
		echo "Please set ANDROID_NDK in your environment. export ANDROID_NDK=<path to Android NDK>"
		exit 1
	fi
	ndk_version=$(sed -En -e 's/^Pkg.Revision *= *([0-9a-f]+).*/\1/p' "$ANDROID_NDK/source.properties")
	if [ -z "$ndk_version" -o "$ndk_version" -lt 18 ]; then
		echo "Need Android NDK r18 or later to compile! Found version '$ndk_version'"
 		exit 1
 	fi
	;;
3ds | ds | gamecube | switch | wii)
	if test -z "$DEVKITPRO"; then
		echo "Please set DEVKITPRO in your environment. export DEVKITPRO=<path to devkitPRO>"
		exit 1
	fi
	;;
dreamcast)
	if test -z "$RONINDIR"; then
		echo "Please set RONINDIR in your environment. export RONINDIR=<path to libronin>"
		exit 1
	fi
	;;
n64)
	if test -z "$N64SDK"; then
		echo "Please set N64SDK in your environment. export N64SDK=<path to n64 sdk>"
		exit 1
	fi
	;;
ps2)
	if test -z "$PS2SDK"; then
		echo "Please set PS2SDK in your environment. export PS2SDK=<path to ps2 sdk>"
		exit 1
	fi
	;;
ps3)
	if test -z "$PS3DEV"; then
		echo "Please set PS3DEV in your environment. export PS3DEV=<path to ps3 toolchain>"
		exit 1
	fi
	if test -z "$PSL1GHT"; then
		echo "Please set PSL1GHT in your environment. export PSL1GHT=<path to psl1ght>"
		exit 1
	fi
	;;
psp2)
	if test -z "$VITASDK"; then
		echo "Please set VITASDK in your environment. export VITASDK=<path to psp2 toolchain>"
		exit 1
	fi
	;;
psp)
	if test -z "$PSPDEV"; then
		PSPDEV=`psp-config --pspdev-path`
	fi
	# TODO: Should we also insist on a valid PSPDEV value?
	if test -z "$PSPSDK"; then
		PSPSDK=`psp-config --pspsdk-path`
	fi
	if test -z "$PSPSDK"; then
		echo "Please set PSPSDK in your environment. export PSPSDK=<path to psp sdk>"
		exit 1
	fi

	# These have to be set early because the compiler will not link successfully
	# during testing otherwise
	if test -d "$PSPDEV/psp/lib"; then
		append_var LDFLAGS "-L$PSPDEV/psp/lib"
	fi
	append_var LDFLAGS "-L$PSPSDK/lib"
	append_var LDFLAGS "-specs=$_srcdir/backends/platform/psp/psp.spec"

	;;
riscos)
	if test -z "$GCCSDK_INSTALL_ENV"; then
		echo "Please set GCCSDK_INSTALL_ENV in your environment. export GCCSDK_INSTALL_ENV=<path to GCCSDK_INSTALL_ENV>"
		exit 1
	fi

	if test -e "$GCCSDK_INSTALL_ENV/bin/tokenize"; then
		add_line_to_config_mk "TOKENIZE := $GCCSDK_INSTALL_ENV/bin/tokenize"
	elif `which tokenize >/dev/null 2>&1`; then
		add_line_to_config_mk "TOKENIZE := tokenize"
	fi
	if test -e "$GCCSDK_INSTALL_ENV/bin/bindhelp"; then
		add_line_to_config_mk "BINDHELP := $GCCSDK_INSTALL_ENV/bin/bindhelp"
	elif `which bindhelp >/dev/null 2>&1`; then
		add_line_to_config_mk "BINDHELP := bindhelp"
	fi
	;;
tizen)
	if test -z "$TIZEN_ROOTSTRAP"; then
		echo "Please set TIZEN_ROOTSTRAP in your environment. export TIZEN_ROOTSTRAP=<path to Tizen SDK device profile>"
		exit 1
	fi
	;;
webos)
	if test -z "$WEBOS_SDK"; then
		echo "Please set WEBOS_SDK in your environment. export WEBOS_SDK=<path to WebOS SDK>"
		exit 1
	fi
	if test -z "$WEBOS_PDK"; then
		echo "Please set WEBOS_PDK in your environment. export WEBOS_PDK=<path to WebOS PDK>"
		exit 1
	fi
	;;
*)
	;;
esac

#
# Determine the C++ compiler
#
echo_n "Looking for C++ compiler... "

# Check whether the given command is a working C++ compiler
test_compiler() {
	cat > tmp_cxx_compiler.cpp << EOF
	class Foo { int a; };
	int main(int argc, char **argv) {
		Foo *a = new Foo(); delete a; return 0;
	}
EOF

	echo "testing compiler: $1" >> "$TMPLOG"

	if test -n "$_host"; then
		# In cross-compiling mode, we cannot run the result
		eval "$1 $CXXFLAGS -o $TMPO.o -c tmp_cxx_compiler.cpp" 2>> "$TMPLOG" && cc_check_clean tmp_cxx_compiler.cpp
	else
		eval "$1 $CXXFLAGS $LDFLAGS -o $TMPO$HOSTEXEEXT tmp_cxx_compiler.cpp" 2>> "$TMPLOG" && eval "$TMPO$HOSTEXEEXT 2>> $TMPLOG" && cc_check_clean tmp_cxx_compiler.cpp
	fi
}

# Prepare a list of candidates for the C++ compiler
if test -n "$CXX" && test_compiler "$CXX"; then
	# Use the compiler specified in CXX
	echo $CXX
else
	if test -n "$_host"; then
		compilers="$_host_alias-g++ $_host_alias-c++ $_host-g++ $_host-c++"
	else
		compilers="g++ c++"
	fi

	# Iterate over all candidates, pick the first working one
	CXX=
	for compiler in $compilers; do
		if test_compiler $compiler; then
			echo "success testing compiler: $compiler" >> "$TMPLOG"
			CXX=$compiler
			echo $CXX
			break
		else
			echo "failure testing compiler: $compiler" >> "$TMPLOG"
		fi
	done
fi

if test -z "$CXX"; then
	echo "none found!"
	exit 1
fi

if test -n "$RANLIB"; then
	_ranlib=$RANLIB
fi

if test -n "$STRIP"; then
	_strip=$STRIP
fi

if test -n "$AR"; then
	_ar="$AR cru"
fi

if test -n "$AS"; then
	_as=$AS
fi

if test -n "$DWP"; then
	_dwp=$DWP
fi

if test -n "$WINDRES"; then
	_windres=$WINDRES
fi

LD=$CXX

#
# Determine the compiler version
#
echocheck "compiler version"

# Some compilers pretend to be gcc to ease compatibility with
# common Linux etc. programs. We first check for some of these here.
have_gcc=no
cc_check_define __GNUC__ && have_gcc=yes
have_icc=no
cc_check_define __INTEL_COMPILER && have_icc=yes
have_clang=no
cc_check_define __clang__ && have_clang=yes

if test "$have_icc" = yes; then
	add_line_to_config_mk 'HAVE_ICC = 1'

	# Make ICC error out on unknown command line options instead of printing
	# a warning. This is for example required to make the -Wglobal-destructors
	# detection work correctly.
	append_var CXXFLAGS "-diag-error 10006,10148"

	# ICC doesn't accept all gcc options, so we disable have_gcc, even if
	# ICC does have the gcc-compatibility defines.
	have_gcc=no
fi

if test "$have_clang" = yes; then
	add_line_to_config_mk 'HAVE_CLANG = 1'

	# clang does accept all gcc options we use, so we keep have_gcc
fi

if test "$have_gcc" = yes; then
	add_line_to_config_mk 'HAVE_GCC = 1'
	_cxx_major=`gcc_get_define __GNUC__`
	_cxx_minor=`gcc_get_define __GNUC_MINOR__`
	cxx_version="`( $CXX -dumpversion ) 2>&1`"

	if test "$have_clang" = yes; then
		# Clang sets a gcc version number for compatibility.
		# We keep that as _cxx_minor/_cxx_major for later
		# compiler version checks.

		# For the version reported in the configure log (cxx_version),
		# we get the actual clang version.
		cxx_version=`gcc_get_define __clang_version__`
		cxx_version="`echo "${cxx_version}" | sed -e 's/"\([^ ]*\) .*/\1/'`"
		cxx_version="clang $cxx_version, ok"
	elif test "$_cxx_major" -eq 2 && test "$_cxx_minor" -ge 95 || \
	   test "$_cxx_major" -gt 2 ; then
		cxx_version="$cxx_version, ok"
		cxx_verc_fail=no
	else
		cxx_version="$cxx_version, bad"
		cxx_verc_fail=yes
	fi
elif test "$have_icc" = yes; then
	cxx_version="`( $CXX -dumpversion ) 2>/dev/null`"
	_cxx_major="`echo "${cxx_version}" | sed -ne 's/\([0-9][0-9]*\)\..*/\1/gp'`"
	_cxx_minor="`echo "${cxx_version}" | sed -ne 's/[0-9][0-9]*\.\([0-9][0-9]*\)/\1/gp'`"
	cxx_version="ICC $cxx_version, ok"
else
	# TODO: Big scary warning about unsupported compilers
	cxx_version=`( $CXX -version ) 2>&1`
	if test "$?" -eq 0; then
		cxx_version="`echo "${cxx_version}" | sed -ne 's/^.*[^0-9]\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*$/\1/gp'`"
		if test -z "${cxx_version}"; then
			cxx_version="not found"
			cxx_verc_fail=yes
		fi
		echo non-gcc compiler version ${cxx_version}
	else
		cxx_version="not found"
		cxx_verc_fail=yes
		echo found non-gcc compiler version ${cxx_version}
	fi

	case $_host_os in
		irix*)
			case $cxx_version in
				7.4.4*)
					# We just assume this is SGI MIPSpro
					_cxx_major=7
					_cxx_minor=4
					cxx_verc_fail=no
					add_line_to_config_mk 'CXX_UPDATE_DEP_FLAG = -MDupdate "$(*D)/$(DEPDIR)/$(*F).d"'
					add_line_to_config_mk '-include Makedepend'
					;;
				*)
					cxx_version="$cxx_version, bad"
					cxx_verc_fail=yes
					;;
			esac
			;;
		*)
			cxx_version="$cxx_version, bad"
			cxx_verc_fail=yes
			;;
	esac
fi

echo "$cxx_version"

#
# Bail out now if no useable compiler was found.
#
if test "$cxx_verc_fail" = yes ; then
	echo
	echo "The version of your compiler is not supported at this time"
	echo "Please ensure you are using GCC >= 2.95"
	exit 1
fi

#
# Check whether the compiler supports C++11
#
have_cxx11=no
cat > $TMPC << EOF
int main(int argc, char *argv[]) { if (argv == nullptr) return -1; else return 0; }
EOF
cc_check -std=c++11 && have_cxx11=yes
if test "$_use_cxx11" = "yes" ; then
	_use_cxx11=$have_cxx11
fi

#
# Setup compiler specific CXXFLAGS now that we know the compiler version.
# Foremost, this means enabling various warnings.
# In addition, we set CXX_UPDATE_DEP_FLAG for GCC >= 3.0 and for ICC.
#
if test "$have_gcc" = yes ; then
	if test "$_cxx_major" -ge "3" ; then
		# Try to use ANSI mode when C++11 is disabled.
		if test "$_use_cxx11" = "no" ; then
			case $_host_os in
			# newlib-based system include files suppress non-C89 function
			# declarations under __STRICT_ANSI__
			3ds | amigaos* | android | androidsdl | dreamcast | ds | gamecube | mingw* | mint* | n64 | psp | ps2 | ps3 | psp2 | switch | tizen | wii )
				;;
			*)
				append_var CXXFLAGS "-ansi"
				;;
			esac
		fi
		append_var CXXFLAGS "-W -Wno-unused-parameter"
		add_line_to_config_mk 'HAVE_GCC3 = 1'
		add_line_to_config_mk 'CXX_UPDATE_DEP_FLAG = -MMD -MF "$(*D)/$(DEPDIR)/$(*F).d" -MQ "$@" -MP'
	fi;

	if test "$_cxx_major" -eq 4 && test "$_cxx_minor" -ge 3 || \
	   test "$_cxx_major" -gt 4 ; then
		append_var CXXFLAGS "-Wno-empty-body"
	else
		append_var CXXFLAGS "-Wconversion"
	fi;
elif test "$have_icc" = yes ; then
	add_line_to_config_mk 'CXX_UPDATE_DEP_FLAG = -MMD -MF "$(*D)/$(DEPDIR)/$(*F).d" -MQ "$@" -MP'
fi;

#
# Update status about C++11 mode
#
echo_n "Building as C++11... "
if test "$_use_cxx11" = "yes" ; then
	append_var CXXFLAGS "-std=c++11"
fi
echo $_use_cxx11

#
# Determine extra build flags for debug and/or release builds
#
if test "$_debug_build" != no; then
	# debug mode not explicitly disabled -> compile with debug information
	echo_n "Checking best debug mode... "

	debug_mode=-g
	test "$_host_os" = amigaos && debug_mode=-gstabs
	append_var CXXFLAGS "$debug_mode"
	echo_n -- "$debug_mode"

	echo "int main() { return 0; }" > $TMPC
	if `which $_dwp >/dev/null 2>&1` && cc_check_no_clean $debug_mode -gsplit-dwarf && `$_dwp -e $TMPO -o /dev/null >/dev/null 2>&1`; then
		append_var CXXFLAGS "-gsplit-dwarf"
		add_line_to_config_mk "SPLIT_DWARF = 1"
		echo_n -- " + split DWARF"
		if cc_check_no_clean $debug_mode -gsplit-dwarf -fuse-ld=gold -Wl,--gdb-index; then
			append_var LDFLAGS "-fuse-ld=gold"
			append_var LDFLAGS "-Wl,--gdb-index"
			echo_n -- " + Gold"
		fi
	fi

	if cc_check_no_clean $debug_mode -fvar-tracking-assignments; then
		append_var CXXFLAGS "-fvar-tracking-assignments"
		echo_n -- " + var tracking"
	fi
	cc_check_clean
	echo ""
fi

if test "$_release_build" = yes; then
	# Add a define, which indicates we are doing
	# an build for a release version.
	append_var DEFINES "-DRELEASE_BUILD"
fi

# By default, we add -pedantic to the CXXFLAGS to catch some potentially
# non-portable constructs, like use of GNU extensions.
# However, some platforms use GNU extensions in system header files, so
# for these we must not use -pedantic.
case $_host_os in
3ds | android | androidsdl | gamecube | ps2 | psp | switch | tizen | wii | webos)
	;;
*)
	# ICC does not support pedantic, while GCC and clang do.
	if test "$have_icc" = no ; then
		# We *do* want the 'long long' extension.
		append_var CXXFLAGS "-pedantic -Wno-long-long"
	fi
	;;
esac

# If possible, we want to use -Wglobal-constructors
# However, not all compilers support that, so check whether the active one does.
echocheck "whether C++ compiler accepts -Wglobal-constructors"
cat > $TMPC << EOF
int main() { return 0; }
EOF
cc_check -Wglobal-constructors -Werror && _global_constructors=yes

if test "$_global_constructors" = yes; then
	append_var CXXFLAGS "-Wglobal-constructors"
fi
echo $_global_constructors

# If the compiler supports the -Wundefined-var-template flag, silence that warning.
# We get this warning a lot with regard to the Singleton class as we explicitly
# instantiate each specialisation. An alternate way to deal with it would be to
# change the way we instantiate the singleton classes as done in PR #967.
# Note: we check the -Wundefined-var-template as gcc does not error out on unknown
# -Wno-xxx flags.
echocheck "whether C++ compiler accepts -Wno-undefined-var-template"
cat > $TMPC << EOF
int main() { return 0; }
EOF
cc_check -Wundefined-var-template -Werror && _no_undefined_var_template=yes

if test "$_no_undefined_var_template" = yes; then
	append_var CXXFLAGS "-Wno-undefined-var-template"
fi
echo $_no_undefined_var_template

# Vanilla clang 6 enables the new -Wpragma-pack which warns when leaving an
# included file which changes the current alignment.
# As our common/pack-{start,end}.h trigger this we disable this warning.
# Because there is no correlation between the version reported by Apple Xcode
# clang and vanilla clang we cannot rely on the __clang_major__/clang_minor__
# macros.
# Note: as above, we check for -Wpragma-pack as not all compilers error out on
# unknown -Wno-xxx flags.
echocheck "whether C++ compiler accepts -Wno-pragma-pack"
echo "int main() { return 0; }" >$TMPC
cc_check -Wpragma-pack -Werror && _no_pragma_pack=yes
test "$_no_pragma_pack" = yes && append_var CXXFLAGS "-Wno-pragma-pack"
echo $_no_pragma_pack

if test -n "$STRINGS"; then
	_strings=$STRINGS
else
	echo_n "Checking for $_host_alias-strings... " >> "$TMPLOG"
	if `which $_host_alias-strings >/dev/null 2>&1`; then
		_strings=$_host_alias-strings
		echo yes >> "$TMPLOG"
	else
		_strings=strings
		echo no >> "$TMPLOG"
	fi
fi

#
# Check for endianness
#
echo_n "Checking endianness... "
cat > tmp_endianness_check.cpp << EOF
unsigned short ascii_mm[] = { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
unsigned short ascii_ii[] = { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
const char * _ascii() { char* s = (char*) ascii_mm; s = (char*) ascii_ii; return s; }
unsigned short ebcdic_ii[] = { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
unsigned short ebcdic_mm[] = { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
const char * _ebcdic() { char* s = (char*) ebcdic_mm; s = (char*) ebcdic_ii; return s; }
int main() { _ascii (); _ebcdic (); return 0; }
EOF
$CXX $LDFLAGS $CXXFLAGS -o $TMPO$HOSTEXEEXT tmp_endianness_check.cpp
if $_strings $TMPO$HOSTEXEEXT | grep BIGenDianSyS >/dev/null; then
	_endian=big
elif $_strings $TMPO$HOSTEXEEXT | grep LiTTleEnDian >/dev/null; then
	_endian=little
fi
echo $_endian;
cc_check_clean tmp_endianness_check.cpp tmp_endianness_check.dwo

case $_endian in
	big)
		add_line_to_config_h '#undef SCUMM_LITTLE_ENDIAN'
		add_line_to_config_h '#define SCUMM_BIG_ENDIAN'
		;;
	little)
		add_line_to_config_h '#define SCUMM_LITTLE_ENDIAN'
		add_line_to_config_h '#undef SCUMM_BIG_ENDIAN'
		;;
	*)
		exit 1
		;;
esac

#
# Determine a data type with the given length
#
find_type_with_size() {
	for datatype in int short char long "long long" __int64 "long long int" unknown; do
		cat > tmp_find_type_with_size.cpp << EOF
typedef $datatype ac__type_sizeof_;
int main() {
	static int test_array [1 - 2 * !(((long int) (sizeof (ac__type_sizeof_))) == $1)];
	test_array [0] = 0;
	return 0;
}
EOF
		if $CXX $CXXFLAGS -c -o $TMPO.o tmp_find_type_with_size.cpp 2>/dev/null ; then
			break
		else
			if test "$datatype" = "unknown"; then
				echo "couldn't find data type with $1 bytes"
				exit 1
			fi
			continue
		fi
	done
	cc_check_clean tmp_find_type_with_size.cpp
	echo $datatype
}

#
# Check whether the system is 32-bit
#
pointer_is_32bit() {
	cat > tmp_pointer_is_32bit.cpp << EOF
int main() {
	static int test_array[1 - 2 * !(sizeof(void *) == 4)];
	test_array[0] = 0;
	return 0;
}
EOF
	$CXX $CXXFLAGS -c -o $TMPO.o tmp_pointer_is_32bit.cpp 2>/dev/null
	status=$?
	cc_check_clean tmp_pointer_is_32bit.cpp
	return $status
}

echo_n "Checking 64-bitness... "
pointer_is_32bit
if test $? -eq 0; then
	type_ptr=uint32
	echo "no"
else
	type_ptr=uint64
	echo "yes"
fi

#
# Determine data type sizes
#
echo_n "Type with 1 byte... "
type_1_byte=`find_type_with_size 1`
TMPR="$?"
echo "$type_1_byte"
test $TMPR -eq 0 || exit 1	# check exit code of subshell

echo_n "Type with 2 bytes... "
type_2_byte=`find_type_with_size 2`
TMPR="$?"
echo "$type_2_byte"
test $TMPR -eq 0 || exit 1	# check exit code of subshell

echo_n "Type with 4 bytes... "
type_4_byte=`find_type_with_size 4`
TMPR="$?"
echo "$type_4_byte"
test $TMPR -eq 0 || exit 1	# check exit code of subshell

echo_n "Type with 8 bytes... "
type_8_byte=`find_type_with_size 8`
TMPR="$?"
echo "$type_8_byte"
test $TMPR -eq 0 || exit 1	# check exit code of subshell

#
# Check whether memory alignment is required
#
# For some CPU types, unaligned memory access is either not supported at
# all (and so leads to a crash), requires a super-slow emulation via an
# exception handler, or just results in incorrect results.
# On the other hand, accessing data in a manner that works regardless of
# alignment can be a lot slower than regular access, so we don't want
# to use it if we don't have to.
#
# So we do the following: For CPU families where we know whether unaligned
# access is safe & fast, we enable / disable unaligned access accordingly.
# Otherwise, we just disable memory alignment.
#
# NOTE: In the past, for non-cross compiled builds, we would also run some code
# which would try to test whether unaligned access worked or not. But this test
# could not reliably determine whether unaligned access really worked in all
# situations (and across different implementations of the target CPU arch), nor
# whether it was fast (as opposed to slowly emulated by fault handlers). Hence,
# we do not use this approach anymore.
#
# NOTE: The only kinds of unaligned access we allow are for 2 byte and 4
# byte loads / stores. No promises are made for bigger sizes, such as 8
# or 16 byte loads, for which architectures may behave differently than
# for the smaller sizes.
echo_n "Alignment required... "
case $_host_cpu in
	i[3-6]86 | amd64 | x86_64 | powerpc* | ppc*)
		# Unaligned access should work
		_need_memalign=no
		;;
	alpha* | arm* | bfin* | hp* | mips* | sh* | sparc* | ia64 | nv1*)
		# Unaligned access is not supported or extremely slow.
		_need_memalign=yes
		;;
	*)
		# Status of unaligned access is unknown, so assume the worst.
		_need_memalign=yes
		;;
esac
echo "$_need_memalign"

define_in_config_h_if_yes $_need_memalign 'SCUMM_NEED_ALIGNMENT'

#
# Check the CPU architecture
#
echo_n "Checking host CPU architecture... "
case $_host_cpu in
	arm*)
		echo "arm"
		case $_host in
			openpandora)
				define_in_config_if_yes yes 'USE_ARM_NEON_ASPECT_CORRECTOR'
				;;
			android | android-arm | androidsdl-armeabi | arm-*riscos | caanoo | ds | gp2x | gp2xwiz | maemo | tizen)
				define_in_config_if_yes yes 'USE_ARM_SCALER_ASM'
				# FIXME: The following feature exhibits a bug. It produces distorted
				# sound since 9003ce517ff9906b0288f9f7c02197fd091d4554. The ARM
				# assembly will need to be properly adapted to the changes to the C
				# code in 8f5a7cde2f99de9fef849b0ff688906f05f4643e.
				# See bug #6957: "AUDIO: ARM ASM sound code causes distorted audio on 32 bit armv6"
				#define_in_config_if_yes yes 'USE_ARM_SOUND_ASM'
				define_in_config_if_yes yes 'USE_ARM_SMUSH_ASM'
				define_in_config_if_yes yes 'USE_ARM_GFX_ASM'
				# FIXME: The following feature exhibits a bug during the intro scene of Indy 4
				# (on Pandora and iPhone at least)
				#define_in_config_if_yes yes 'USE_ARM_COSTUME_ASM'
				;;
		esac

		append_var DEFINES "-DARM_TARGET"
		;;
	aarch64)
		echo "aarch64"
		;;
	i[3-6]86)
		echo "x86"
		_have_x86=yes
		define_in_config_h_if_yes $_have_x86 'HAVE_X86'
		;;
	mips*)
		echo "MIPS"
		append_var DEFINES "-DMIPS_TARGET"
		;;
	powerpc* | ppc*)
		echo "PowerPC"
		append_var DEFINES "-DPPC_TARGET"
		;;
	amd64 | x86_64)
		echo "x86_64"
		;;
	*)
		echo "unknown ($_host_cpu)"
		;;
esac


#
# Determine build settings
#
echo_n "Checking hosttype... "
echo $_host_os
case $_host_os in
	3ds)
		_optimization_level=-O2
		append_var DEFINES "-D__3DS__"
		append_var DEFINES "-DARM"
		append_var DEFINES "-DARM11"
		append_var CXXFLAGS "-march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft"
		append_var CXXFLAGS "-mword-relocations"
		append_var CXXFLAGS "-ffunction-sections"
		append_var CXXFLAGS "-fomit-frame-pointer"
		append_var CXXFLAGS "-I$DEVKITPRO/libctru/include"
		append_var CXXFLAGS "-I$DEVKITPRO/portlibs/3ds/include"
		append_var LDFLAGS "-march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft"
		append_var LDFLAGS "-L$DEVKITPRO/libctru/lib"
		append_var LDFLAGS "-L$DEVKITPRO/portlibs/3ds/lib"
		append_var LDFLAGS "-specs=3dsx.specs -lctru"
		append_var LIBS "-lcitro3d"
		;;
	amigaos*)
		append_var LDFLAGS "-Wl,--export-dynamic"
		append_var LDFLAGS "-L/sdk/local/newlib/lib"
		# We have to use 'long' for our 4 byte typedef because AmigaOS already typedefs (u)int32
		# as (unsigned) long, and consequently we'd get a compiler error otherwise.
		type_4_byte='long'
		# Supress format warnings as the long 4 byte causes noisy warnings.
		append_var CXXFLAGS "-Wno-format"
		add_line_to_config_mk 'AMIGAOS = 1'
		_port_mk="backends/platform/sdl/amigaos/amigaos.mk"
		_nuked_opl=no
		;;
	android)
		case $_host in
			android | android-arm)
				append_var CXXFLAGS "-march=armv5te"
				append_var CXXFLAGS "-mtune=xscale"
				append_var CXXFLAGS "-mfloat-abi=softfp"
				append_var LDFLAGS "-mthumb"
				ABI="armeabi"
				;;
			android-v7a | android-arm-v7a)
				append_var CXXFLAGS "-march=armv7-a"
				append_var CXXFLAGS "-mfloat-abi=softfp"
				append_var CXXFLAGS "-mfpu=vfp"
				append_var LDFLAGS "-Wl,--fix-cortex-a8"
				ABI="armeabi-v7a"
				;;
			android-mips)
				append_var CXXFLAGS "-march=mips32"
				append_var CXXFLAGS "-mtune=mips32"
				ABI="mips"
				;;
			android-x86)
				append_var CXXFLAGS "-march=i686"
				append_var CXXFLAGS "-mtune=i686"
				ABI="x86"
				;;
		esac

		append_var LDFLAGS "-static-libstdc++"
		append_var LDFLAGS "-Wl,--build-id=sha1"
		append_var CXXFLAGS "-fpic"
		append_var CXXFLAGS "-ffunction-sections"
		append_var CXXFLAGS "-funwind-tables"
		if test "$_debug_build" = yes; then
			append_var CXXFLAGS "-fno-omit-frame-pointer"
			append_var CXXFLAGS "-fno-strict-aliasing"
		else
			append_var CXXFLAGS "-fomit-frame-pointer"
			append_var CXXFLAGS "-fstrict-aliasing"
		fi
		_optimization_level=-Os

		add_line_to_config_mk "ANDROID_SDK = $ANDROID_SDK"
		_seq_midi=no
		;;
	beos*)
		append_var DEFINES "-DSYSTEM_NOT_SUPPORTING_D_TYPE"
		# Needs -lbind -lsocket for the timidity MIDI driver
		LDFLAGS="-L/boot/home/config/lib"
		CFLAGS="-I/boot/home/config/include"
		append_var CXXFLAGS "-fhuge-objects"
		append_var LIBS "-lbind -lsocket"
		_seq_midi=no
		;;
	cygwin*)
		echo ERROR: Cygwin building is not supported by ScummVM anymore. Consider using MinGW.
		exit 1
		;;
	darwin*)
		# Pass -mlongcall to gcc so that it emits long calls
		# which will allow for calls larger than 32MB. The linker
		# will discard the calls if they are not needed, but we
		# need to ensure the compiler emits them in the first place.
		case $_host_cpu in
		powerpc*)
			append_var CFLAGS "-mlongcall"
			append_var CXXFLAGS "-mlongcall"
			;;
		esac

		append_var DEFINES "-DMACOSX"
		append_var LIBS "-framework AudioUnit -framework AudioToolbox -framework Carbon -framework CoreMIDI"
		# SDL2 doesn't seem to add Cocoa for us.
		append_var LIBS "-framework Cocoa"
		add_line_to_config_mk 'MACOSX = 1'

		# Now we may have MacPorts or Fink installed
		# Which put libraries and headers in non-standard places
		# Checking them here

		# MacPorts
		# There is no way to get the prefix, so implementing a hack here
		macport_version=`port version 2>/dev/null`
		if test "$?" -eq 0; then
			macport_version="`echo "${macport_version}" | sed -ne 's/Version: \([0-9]\.[0-9]\.[0-9]\)/\1/gp'`"
			echo_n "You seem to be running MacPorts version ${macport_version}..."

			macport_prefix=`which port`
			# strip off /bin/port from /opt/local/bin/port
			macport_prefix=`dirname ${macport_prefix}`
			macport_prefix=`dirname ${macport_prefix}`

			echo "adding ${macport_prefix} to paths"

			LDFLAGS="-L${macport_prefix}/lib $LDFLAGS"
			CXXFLAGS="-I${macport_prefix}/include $CXXFLAGS"

			if test -z "$_staticlibpath"; then
				_staticlibpath=${macport_prefix}
				echo "Set staticlib-prefix to ${_staticlibpath}"
			fi
		fi

		# Fink
		# There is no way to get the prefix, so implementing a hack here
		fink_version=`fink -V 2>/dev/null`
		if test "$?" -eq 0; then
			fink_version="`echo "${fink_version}" | sed -ne 's/Package manager version: \([0-9.]*\)/\1/gp'`"
			echo_n "You seem to be running Fink version ${fink_version}..."

			fink_prefix=`which fink`
			# strip off /bin/fink from /sw/bin/port
			fink_prefix=`dirname ${fink_prefix}`
			fink_prefix=`dirname ${fink_prefix}`

			echo "adding ${fink_prefix} to paths"

			LDFLAGS="-L${fink_prefix}/lib $LDFLAGS"
			CXXFLAGS="-I${fink_prefix}/include $CXXFLAGS"

			if test -z "$_staticlibpath"; then
				_staticlibpath=${fink_prefix}
				echo "Set staticlib-prefix to ${_staticlibpath}"
			fi
		fi

		# Homebrew
		brew_version=`brew -v 2>/dev/null`
		if test "$?" -eq 0; then
			brew_version="`echo "${brew_version}" | sed -ne 's/Homebrew \([0-9.]*\)/\1/gp'`"
			echo_n "You seem to be running Homebrew version ${brew_version}..."

			brew_prefix=`brew --prefix`

			echo "adding ${brew_prefix} to paths"

			LDFLAGS="-L${brew_prefix}/lib $LDFLAGS"
			CXXFLAGS="-I${brew_prefix}/include $CXXFLAGS"

			if test -z "$_staticlibpath"; then
				_staticlibpath=${brew_prefix}
				echo "Set staticlib-prefix to ${_staticlibpath}"
			fi
		fi

		# If _staticlibpath is not set yet try first /sw (fink) then /usr/local
		# (the macports case is handled above).
		if test -z "$_staticlibpath"; then
			if test -d "/sw"; then
				_staticlibpath=/sw
				echo "Set staticlib-prefix to ${_staticlibpath}"
			elif test -d "/usr/local"; then
				_staticlibpath=/usr/local
				echo "Set staticlib-prefix to ${_staticlibpath}"
			else
				echo "Could not determine prefix for static libraries"
			fi
		fi

		# If _xcodetoolspath is not set yet use xcode-select to get the path
		if test -z "$_xcodetoolspath"; then
			_xcodetoolspath=`xcode-select -print-path`/Tools
			if test -d "$_xcodetoolspath"; then
				echo "Set xcodetools-path to ${_xcodetoolspath}"
			else
				_xcodetoolspath=
				echo "Could not determine path for Xcode Tools"
			fi
		fi

		# Building with SDK 10.14+ causes blurry display on Retina screens.
		# A workaround is to set the LC_VERSION_MIN_MACOSX load command's sdk value
		# to n/a (i.e. 0.0). See bug #11430 for details.
		echocheck "macOS deployement target"
		_macos_min_version=undefined
		for _macos_min_version_check in 1030 140 1050 1060 1070 1080 1090 101000 101100 101200 101300 101400 101500 101600; do
			cat > $TMPC << EOF
#include "AvailabilityMacros.h"
#if MAC_OS_X_VERSION_MIN_REQUIRED > ${_macos_min_version_check}
error
#endif
int main(int argc, char *argv[]) { return 0; }
EOF
			cc_check
			if test "$TMPR" -eq 0; then
				_macos_min_version=$_macos_min_version_check
				break
			fi
		done
		# Also get a dot version of the min version
		_macos_min_version_dot=undefined
		if test "$_macos_min_version" != undefined ; then
			if test "$_macos_min_version" -lt 101000; then
				_macos_min_ver_major=$((${_macos_min_version}/100))
				_macos_min_ver_minor=$((${_macos_min_version}/10 - 10*${_macos_min_ver_major}))
				_macos_min_version_dot=${_macos_min_ver_major}.${_macos_min_ver_minor}
			else
				_macos_min_ver_major=$((${_macos_min_version}/10000))
				_macos_min_ver_minor=$((${_macos_min_version}/100 - 100*${_macos_min_ver_major}))
				_macos_min_version_dot=${_macos_min_ver_major}.${_macos_min_ver_minor}
			fi
		fi
		echo $_macos_min_version_dot

		# Building with SDK 10.14+ causes blurry display on Retina screens.
		# A workaround is to set the LC_VERSION_MIN_MACOSX load command's sdk value
		# to n/a (i.e. 0.0). See bug #11430 for details.
		# We do it in any case when the linker supports the -platform_version flag,
		# even when using an older SDK.
		echo_n "Checking if linker supports -platform_version... "
		_macos_has_ld_platform_version=no
		cat > $TMPC << EOF
int main(int argc, char *argv[]) { return 0; }
EOF
		_macos_ldflags_platform_version="-Xlinker -platform_version -Xlinker macos -Xlinker $_macos_min_version_dot -Xlinker 0.0.0"
		cc_check $_macos_ldflags_platform_version && _macos_has_ld_platform_version=yes
		echo $_macos_has_ld_platform_version
		if test "$_macos_has_ld_platform_version" = yes ; then
			append_var LDFLAGS "$_macos_ldflags_platform_version"
		fi

		# When building for MacOS X 10.5 or below we need to use the legacy icon
		if test "$_macos_min_version" != undefined -a "$_macos_min_version" -lt 1060 ; then
			add_line_to_config_mk 'MACOSX_USE_LEGACY_ICONS = 1'
		fi

		# When building with SDK 10.14 or above, we cannot compile the 32 bits dock plugin
		# Assume the SDK version is the same as the min version.
		if test "$_macos_min_version" != undefined -a "$_macos_min_version" -gt 101399 ; then
			add_line_to_config_mk 'MACOSX_64_BITS_ONLY = 1'
		fi

		# Use pandoc to generate README and NEWS file for the bundle
		# Also default to  HTML rather than plain text as it gives a nicer
		# formating, especially for the README. We could consider using RTF
		# as well, but TextEdit does not support links within the document,
		# and having a TOC with links, which we do with html, is quite convenient.
		_pandoc=yes
		if test "$_pandocformat" = "default"; then
			_pandocformat="html"
		fi
		;;
	dreamcast)
		append_var DEFINES "-D__DC__"
		append_var DEFINES "-DNONSTANDARD_PORT"
		;;
	ds)
		append_var DEFINES "-D__DS__"
		append_var DEFINES "-DNDS"
		append_var DEFINES "-DARM9"
		append_var DEFINES "-DARM"
		append_var DEFINES "-DNONSTANDARD_PORT"
		append_var CXXFLAGS "-isystem $DEVKITPRO/libnds/include"
		append_var CXXFLAGS "-isystem $DEVKITPRO/portlibs/nds/include"
		append_var CXXFLAGS "-isystem $DEVKITPRO/portlibs/armv5te/include"
		append_var CXXFLAGS "-mcpu=arm9tdmi"
		append_var CXXFLAGS "-mtune=arm9tdmi"
		append_var CXXFLAGS "-fomit-frame-pointer"
		append_var CXXFLAGS "-mthumb-interwork"
		append_var CXXFLAGS "-ffunction-sections"
		append_var CXXFLAGS "-fdata-sections"
		append_var CXXFLAGS "-fno-strict-aliasing"
		append_var CXXFLAGS "-fuse-cxa-atexit"
		append_var LDFLAGS "-mthumb-interwork"
		append_var LDFLAGS "-mfloat-abi=soft"
		append_var LDFLAGS "-Wl,-Map,map.txt"
		if test "$_dynamic_modules" = no ; then
			append_var LDFLAGS "-Wl,--gc-sections"
		else
			append_var LDFLAGS "-Wl,--no-gc-sections"
			# TODO automate this required 2 step linking phase
			# append_var LDFLAGS "-Wl,--retain-symbols-file,ds.syms"
		fi
		append_var LDFLAGS "-L$DEVKITPRO/libnds/lib"
		append_var LDFLAGS "-L$DEVKITPRO/portlibs/nds/lib"
		append_var LDFLAGS "-L$DEVKITPRO/portlibs/armv5te/lib"
		append_var LIBS "-specs=ds_arm9.specs"
		append_var LIBS "-lnds9"
		;;
	freebsd*)
		append_var LDFLAGS "-L/usr/local/lib"
		append_var CXXFLAGS "-I/usr/local/include"
		;;
	gamecube)
		_optimization_level=-Os
		append_var CXXFLAGS "-mogc"
		append_var CXXFLAGS "-mcpu=750"
		append_var CXXFLAGS "-meabi"
		append_var CXXFLAGS "-mhard-float"
		append_var CXXFLAGS "-ffunction-sections"
		append_var CXXFLAGS "-fdata-sections"
		append_var CXXFLAGS "-fmodulo-sched"
		append_var CXXFLAGS "-fuse-cxa-atexit"
		append_var CXXFLAGS "-I$DEVKITPRO/libogc/include"
		append_var CXXFLAGS "-I$DEVKITPRO/portlibs/ppc/include"
		# libogc is required to link the cc tests (includes _start())
		append_var LDFLAGS "-mogc"
		append_var LDFLAGS "-mcpu=750"
		append_var LDFLAGS "-L$DEVKITPRO/libogc/lib/cube"
		append_var LDFLAGS "-L$DEVKITPRO/portlibs/ppc/lib"
		append_var LDFLAGS "-logc"
		if test "$_dynamic_modules" = "yes" ; then
			# retarded toolchain patch forces --gc-sections, overwrite it
			append_var LDFLAGS "-Wl,--no-gc-sections"
		fi
		;;
	haiku*)
		append_var DEFINES "-DSYSTEM_NOT_SUPPORTING_D_TYPE"
		# Needs -lnetwork for the timidity MIDI driver
		append_var LIBS "-lnetwork"
		_seq_midi=no
		;;
	irix*)
		append_var DEFINES "-DIRIX"
		append_var DEFINES "-DSYSTEM_NOT_SUPPORTING_D_TYPE"
		append_var LIBS "-lmd -lfastm -lm"
		_ranlib=:
		;;
	linux* | uclinux*)
		# When not cross-compiling, enable large file support, but don't
		# care if getconf doesn't exist or doesn't recognize LFS_CFLAGS.
		if test -z "$_host"; then
			append_var CXXFLAGS "`getconf LFS_CFLAGS 2>/dev/null`"
		fi
		;;
	mingw*)
		append_var DEFINES "-DWIN32"
		# append_var DEFINES "-D__USE_MINGW_ANSI_STDIO=0"  # Modern MinGW does not need it
		append_var LDFLAGS "-static-libgcc -static-libstdc++"
		append_var LIBS "-lmingw32 -lwinmm -lgdi32"
		append_var OBJS "dists/residualvm.o"
		add_line_to_config_mk 'WIN32 = 1'
		_port_mk="backends/platform/sdl/win32/win32.mk"
		;;
	mint*)
		append_var DEFINES "-DSYSTEM_NOT_SUPPORTING_D_TYPE"
		append_var DEFINES "-D_GNU_SOURCE"
		append_var DEFINES "-D_ISOC11_SOURCE"
		;;
	msys)
		echo ERROR: Using the MSYS shell in msys mode is not supported. Please use the MSYS shell in mingw mode instead.
		exit 1
		;;
	n64)
		append_var DEFINES "-D__N64__"
		append_var DEFINES "-DLIMIT_FPS"
		append_var DEFINES "-DNONSTANDARD_PORT"
		append_var DEFINES "-DDISABLE_COMMAND_LINE"
		append_var DEFINES "-DDISABLE_DEFAULT_SAVEFILEMANAGER"
		append_var DEFINES "-DDISABLE_DOSBOX_OPL"
		append_var DEFINES "-DDISABLE_FANCY_THEMES"
		append_var DEFINES "-DDISABLE_NES_APU"
		append_var DEFINES "-DDISABLE_SID"
		append_var DEFINES "-DREDUCE_MEMORY_USAGE"
		add_line_to_config_mk 'N64 = 1'
		_nuked_opl=no
		;;
	ps2)
		append_var CXXFLAGS "-G2"
		append_var DEFINES "-D_EE"
		append_var DEFINES "-D__PLAYSTATION2__"
		if test -z "$PS2SDK_OLD"; then
			append_var DEFINES "-D__NEW_PS2SDK__"
		fi
		;;
	ps3)
		# Force use of SDL and freetype from the ps3 toolchain
		_sdlpath="$PS3DEV/portlibs/ppu:$PS3DEV/portlibs/ppu/bin"
		_freetypepath="$PS3DEV/portlibs/ppu:$PS3DEV/portlibs/ppu/bin"
		_libcurlpath="$PS3DEV/portlibs/ppu:$PS3DEV/portlibs/ppu/bin"

		append_var DEFINES "-DPLAYSTATION3"
		append_var CXXFLAGS "-mcpu=cell -mno-fp-in-toc -I$PSL1GHT/ppu/include -I$PS3DEV/portlibs/ppu/include"
		append_var LDFLAGS "-L$PSL1GHT/ppu/lib -L$PS3DEV/portlibs/ppu/lib"
		# The network libraries are statically linked and need to be specified in the following order
		append_var SDL_NET_LIBS "-lSDL_net -lnet -lsysmodule"
		add_line_to_config_mk 'PLAYSTATION3 = 1'
		add_line_to_config_h "#define PREFIX \"${prefix}\""
		;;
	psp2)
		_freetypepath="$VITASDK/arm-vita-eabi/bin"
		_freetype2=yes
		_libcurlpath="$VITASDK/arm-vita-eabi/bin"
		append_var CXXFLAGS "--sysroot=$VITASDK/arm-vita-eabi"
		append_var LDFLAGS "--sysroot=$VITASDK/arm-vita-eabi"
		append_var DEFINES "-DPSP2 -DSYSTEM_NOT_SUPPORTING_D_TYPE"
		append_var CXXFLAGS "-Wl,-q -I$VITASDK/arm-vita-eabi/include"
		append_var CXXFLAGS "-march=armv7-a -mtune=cortex-a9 -mfpu=neon -mfloat-abi=hard"
		append_var LDFLAGS "-Wl,-q -L$VITASDK/arm-vita-eabi/lib"
		#the next line fixes a crash when starting scumm-7-8 games (The Dig etc.)
		#when either -O2, -O3 or -Os optimizations are enabled
		append_var CXXFLAGS "-fno-optimize-sibling-calls"
		#the next line fixes "branch out of range" error in gob engine when -Os is used
		append_var CXXFLAGS "-mlong-calls"
		append_var CXXFLAGS "-mword-relocations"
		append_var CXXFLAGS "-fomit-frame-pointer"
		#use link time optimization to further reduce exe size
		append_var CXXFLAGS "-flto=20"
		append_var LDFLAGS "-flto=20"
		#ensure verbose output during linking to prevent buildbot kills after 1200 seconds
		if test "$_verbose_build" = yes ; then
			append_var LDFLAGS "-Wl,-v --verbose"
		fi
		#use linker dead code elimination to further reduce exe size
		append_var CXXFLAGS "-ffunction-sections -fdata-sections"
		append_var LDFLAGS "-Wl,--gc-sections"
		if test "$_debug_build" = no; then
		#optimize for smallest file size. This is necessary to prevent a crash on startup
		#due to the large executable file size when many engines are enabled
		#for example when --enable-all-engines is used to enable all the unstable engines
			_optimization_level=-Os
		fi
		if test "$_debug_build" = yes; then
			_optimization_level=-O0
			append_var DEFINES "-D__PSP2_DEBUG__"
			append_var LIBS "-lpsp2shell"
		fi
		add_line_to_config_mk 'PSP2 = 1'
		add_line_to_config_h "#define PREFIX \"${prefix}\""
		;;
	psp)
		_optimization_level=-O2
		append_var CXXFLAGS "-I$PSPSDK/include"
		# FIXME: Why is the following in CXXFLAGS and not in DEFINES? Change or document this.
		append_var CXXFLAGS "-D_PSP_FW_VERSION=150"
		add_line_to_config_mk 'PSP = 1'
		;;
	riscos)
		define_in_config_if_yes yes 'RISCOS'
		append_var LDFLAGS "-L$GCCSDK_INSTALL_ENV/lib"
		append_var CXXFLAGS "-isystem $GCCSDK_INSTALL_ENV/include"
		_pkgconfig=$GCCSDK_INSTALL_ENV/ro-pkg-config
		_sdlpath=$GCCSDK_INSTALL_ENV/bin
		_freetypepath=$GCCSDK_INSTALL_ENV/bin
		_libcurlpath=$GCCSDK_INSTALL_ENV/bin
		append_var CXXFLAGS "-march=armv3m"
		append_var CXXFLAGS "-mtune=xscale"
		append_var LDFLAGS "-static"
		_optimization_level=-O2
		append_var CXXFLAGS "-ffunction-sections"
		append_var CXXFLAGS "-fdata-sections"
		append_var LDFLAGS "-Wl,--gc-sections"
		_port_mk="backends/platform/sdl/riscos/riscos.mk"
		_pandoc=yes
		_sdlconfig=sdl-config
		;;
	solaris*)
		append_var DEFINES "-DSOLARIS"
		append_var DEFINES "-DSYSTEM_NOT_SUPPORTING_D_TYPE"
		# Needs -lbind -lsocket for the timidity MIDI driver
		append_var LIBS "-lnsl -lsocket"
		;;
	switch)
		_pkgconfig="$DEVKITPRO/portlibs/switch/bin/aarch64-none-elf-pkg-config"
		_libcurlpath="$DEVKITPRO/portlibs/switch/bin"
		_sdlpath="$DEVKITPRO/portlibs/switch/bin"
		append_var DEFINES "-DSWITCH -D__SWITCH__ -DNINTENDO_SWITCH"
		append_var CXXFLAGS "-march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIE -ftls-model=local-exec"
		append_var CXXFLAGS "-ffunction-sections -fdata-sections"
		append_var CXXFLAGS "-I$DEVKITPRO/libnx/include -I$DEVKITPRO/portlibs/switch/include"
		append_var LDFLAGS "-L$DEVKITPRO/libnx/lib -L$DEVKITPRO/portlibs/switch/lib"
		append_var LIBS "-specs=$DEVKITPRO/libnx/switch.specs"
		add_line_to_config_mk 'SWITCH = 1'
		if test "$_debug_build" = yes; then
			append_var DEFINES "-D__SWITCH_DEBUG__"
		else
			_optimization_level=-O3
		fi
		;;
	tizen)
		add_line_to_config_mk "TIZEN_ROOTSTRAP = $TIZEN_ROOTSTRAP"
		append_var LDFLAGS "--sysroot=${TIZEN_ROOTSTRAP}"
		append_var LDFLAGS "-L${TIZEN_LIBS}/lib"
		append_var CXXFLAGS "-I${TIZEN_LIBS}/include"
		;;
	webos)
		append_var CXXFLAGS "--sysroot=$WEBOS_PDK/arm-gcc/sysroot"
		append_var CXXFLAGS "-I$WEBOS_PDK/include"
		append_var CXXFLAGS "-I$WEBOS_PDK/include/SDL"
		append_var CXXFLAGS "-I$WEBOS_PDK/device/usr/include"
		# These compiler options are needed to support the Palm Pixi
		append_var CXXFLAGS "-mcpu=arm1136jf-s"
		append_var CXXFLAGS "-mfpu=vfp "
		append_var CXXFLAGS "-mfloat-abi=softfp"
		append_var LDFLAGS "-L$WEBOS_PDK/device/lib"
		append_var LDFLAGS "-L$WEBOS_PDK/device/usr/lib"
		append_var LDFLAGS "-Wl,--allow-shlib-undefined"
		append_var LDFLAGS "--sysroot=$WEBOS_PDK/arm-gcc/sysroot"
		add_line_to_config_mk "WEBOS_SDK = $WEBOS_SDK"
		_seq_midi=no
		;;
	wii)
		_optimization_level=-Os
		append_var CXXFLAGS "-mrvl"
		append_var CXXFLAGS "-mcpu=750"
		append_var CXXFLAGS "-meabi"
		append_var CXXFLAGS "-mhard-float"
		append_var CXXFLAGS "-ffunction-sections"
		append_var CXXFLAGS "-fdata-sections"
		append_var CXXFLAGS "-fmodulo-sched"
		append_var CXXFLAGS "-fuse-cxa-atexit"
		append_var CXXFLAGS "-I$DEVKITPRO/libogc/include"
		append_var CXXFLAGS "-I$DEVKITPRO/portlibs/ppc/include"
		# libogc is required to link the cc tests (includes _start())
		append_var LDFLAGS "-mrvl"
		append_var LDFLAGS "-mcpu=750"
		append_var LDFLAGS "-L$DEVKITPRO/libogc/lib/wii"
		append_var LDFLAGS "-L$DEVKITPRO/portlibs/ppc/lib"
		append_var LDFLAGS "-logc"
		if test "$_dynamic_modules" = "yes" ; then
			# retarded toolchain patch forces --gc-sections, overwrite it
			append_var LDFLAGS "-Wl,--no-gc-sections"
		fi
		;;
esac

if test -n "$_host"; then
	# Cross-compiling mode - add your target here if needed
	echo "Cross-compiling to $_host"
	case "$_host" in
		3ds)
			append_var DEFINES "-DDISABLE_FANCY_THEMES"
			append_var DEFINES "-DDISABLE_SID"
			append_var DEFINES "-DDISABLE_NES_APU"
			_backend="3ds"
			_build_scalers=no
			_vkeybd=yes
			_mt32emu=no
			# Should use Tremor instead of Vorbis
			_vorbis=no
			_port_mk="backends/platform/3ds/3ds.mk"
			;;
		android | android-arm | android-v7a | android-arm-v7a | android-arm64-v8a | android-mips | android-x86 | ouya)
			# also __ANDROID__ is defined by Clang in the NDK
			DEFINES="$DEFINES -D__ANDROID_PLAIN_PORT__ -DANDROID_PLAIN_PORT"
			# we link a .so as default
			append_var LDFLAGS "-shared"
			append_var LDFLAGS "-Wl,-Bsymbolic,--no-undefined"
			append_var LDFLAGS "-static-libstdc++"
			HOSTEXEPRE=lib
			HOSTEXEEXT=.so
			_backend="android"
			_port_mk="backends/platform/android/android.mk"
			_build_scalers=no
			_seq_midi=no
			_timidity=no
			;;
		androidsdl | androidsdl-armeabi | androidsdl-armeabi-v7a | androidsdl-mips | androidsdl-x86 | androidsdl-arm64-v8a | androidsdl-x86_64)
			DEFINES="$DEFINES -DANDROIDSDL"
			_unix=yes
			_seq_midi=no
			_timidity=no
			_backend="androidsdl"
			_port_mk="backends/platform/androidsdl/androidsdl.mk"
			;;
		arm-linux|arm*-linux-gnueabi|arm-*-linux)
			;;
		arm-*riscos)
			_opengl_mode=none
			_vorbis=no
			;;
		bfin*)
			;;
		caanoo)
			append_var DEFINES "-DCAANOO"
			if test "$_debug_build" = no; then
				# Use -O3 on the Caanoo for non-debug builds.
				_optimization_level=-O3
			fi
			append_var CXXFLAGS "-mcpu=arm926ej-s"
			append_var CXXFLAGS "-mtune=arm926ej-s"
			_backend="gph"
			_build_hq_scalers=no
			_savegame_timestamp=no
			_vkeybd=yes
			_seq_midi=no
			_mt32emu=no
			_timidity=no
			_port_mk="backends/platform/gph/caanoo-bundle.mk"
			;;
		*darwin*)
			_ranlib=$_host-ranlib
			_strip=$_host-strip
			;;
		dingux)
			append_var DEFINES "-DDISABLE_DOSBOX_OPL"
			append_var DEFINES "-DREDUCE_MEMORY_USAGE"
			append_var CXXFLAGS "-msoft-float"
			append_var CXXFLAGS "-mips32"
			_backend="dingux"
			_mt32emu=no
			_nuked_opl=no
			_optimization_level=-O3
			# Disable alsa midi to get the port build on OpenDingux toolchain
			_alsa=no
			# Disable cloud and SDL_Net due to outdated toolchain
			_cloud=no
			_sdlnet=no
			_libcurl=no
			_vkeybd=yes
			_build_hq_scalers=no
			# Force disable vorbis on dingux, it has terrible performance compared to tremor
			_vorbis=no
			# Force disable seq on dingux, no way to use it and it would get enabled by default with configure
			_seq_midi=no
			_port_mk="backends/platform/dingux/dingux.mk"
			;;
		raspberrypi)
			_libcurlpath=$RPI_ROOT/usr/bin
			# This is needed because the official cross compiler doesn't have multiarch enabled
			# but Raspbian does.
			# Be careful as it's the linker (LDFLAGS) which must know about sysroot.
			# These are needed to build against Raspbian's libSDL.
			append_var LDFLAGS "--sysroot=$RPI_ROOT"
			append_var LDFLAGS "-B$RPI_ROOT/usr/lib/arm-linux-gnueabihf"
			append_var LDFLAGS "-Xlinker --rpath-link=$RPI_ROOT/usr/lib/arm-linux-gnueabihf/pulseaudio"
			append_var LDFLAGS "-Xlinker --rpath-link=$RPI_ROOT/usr/lib/arm-linux-gnueabihf"
			append_var LDFLAGS "-Xlinker --rpath-link=$RPI_ROOT/lib/arm-linux-gnueabihf"
			append_var LDFLAGS "-Xlinker --rpath-link=$RPI_ROOT/opt/vc/lib"
			append_var LDFLAGS "-L$RPI_ROOT/opt/vc/lib"
			append_var CXXFLAGS "-isystem $RPI_ROOT/usr/include/arm-linux-gnueabihf"
			append_var CXXFLAGS "-I$RPI_ROOT/usr/include"
			# This is so optional OpenGL ES includes are found.
			append_var CXXFLAGS "-I$RPI_ROOT/opt/vc/include"
			_savegame_timestamp=no
			# We prefer SDL2 on the Raspberry Pi: acceleration now depends on it
			# since SDL2 manages dispmanx/GLES2 very well internally.
			# SDL1 is bit-rotten on this platform.
			_sdlconfig=sdl2-config
			# OpenGL ES support is mature enough as to be the best option on
			# the Raspberry Pi, so it's enabled by default.
			# The Raspberry Pi always supports OpenGL ES 2.0 contexts, thus we
			# take advantage of those.
			_opengl_mode=gles2
			;;
		dreamcast)
			append_var DEFINES "-DDISABLE_DEFAULT_SAVEFILEMANAGER"
			append_var DEFINES "-DDISABLE_TEXT_CONSOLE"
			append_var DEFINES "-DDISABLE_COMMAND_LINE"
			# Enable serial debugging output only when --enable-debug is passed
			if test "$_release_build" = yes -o "$_debug_build" != yes; then
				append_var DEFINES "-DNOSERIAL"
			fi
			_optimization_level=-O3
			append_var CXXFLAGS "-funroll-loops"
			append_var CXXFLAGS "-fschedule-insns2"
			append_var CXXFLAGS "-fomit-frame-pointer"
			append_var CXXFLAGS "-fdelete-null-pointer-checks"
			_backend="dc"
			_build_scalers=no
			# These two are needed due to shortcomings of the
			# detection systems.  Do not remove until auto-
			# detection works correctly.
			_mad=yes
			_zlib=yes
			_port_mk="backends/platform/dc/dreamcast.mk"
			;;
		ds)
			append_var DEFINES "-DDISABLE_COMMAND_LINE"
			append_var DEFINES "-DDISABLE_DEFAULT_SAVEFILEMANAGER"
			append_var DEFINES "-DDISABLE_DOSBOX_OPL"
			append_var DEFINES "-DDISABLE_FANCY_THEMES"
			append_var DEFINES "-DDISABLE_SID"
			append_var DEFINES "-DDISABLE_NES_APU"
			append_var DEFINES "-DDISABLE_TEXT_CONSOLE"
			append_var DEFINES "-DREDUCE_MEMORY_USAGE"
			append_var DEFINES "-DSTREAM_AUDIO_FROM_DISK"
			append_var DEFINES "-DVECTOR_RENDERER_FORMAT=1555"
			_backend="ds"
			_build_scalers=no
			_mt32emu=no
			_nuked_opl=no
			_bink=no
			_lua=no
			_port_mk="backends/platform/ds/ds.mk"
			;;
		gamecube)
			_backend="wii"
			_build_scalers=no
			_vkeybd=yes
			_mt32emu=no
			_port_mk="backends/platform/wii/wii.mk"
			add_line_to_config_mk 'GAMECUBE = 1'
			add_line_to_config_h '#define AUDIO_REVERSE_STEREO'
			add_line_to_config_h '#define GAMECUBE'
			add_line_to_config_h "/* #define DEBUG_WII_USBGECKO */"
			add_line_to_config_h "/* #define DEBUG_WII_MEMSTATS */"
			add_line_to_config_h "/* #define DEBUG_WII_GDB */"
			add_line_to_config_h "#define USE_WII_DI"
			;;
		gcw0)
			_sysroot=`$CXX --print-sysroot`
			_sdlpath=$_sysroot/usr/bin
			append_var DEFINES "-DGCW0"
			append_var DEFINES "-DREDUCE_MEMORY_USAGE"
			append_var CXXFLAGS "-mips32"
			_backend="dingux"
			_alsa=no
			_mt32emu=no
			_seq_midi=no
			_timidity=no
			_build_scalers=no
			_optimization_level=-O3
			_vkeybd=yes
			_vorbis=no
			_port_mk="backends/platform/dingux/dingux.mk"
			;;
		gp2x)
			append_var DEFINES "-DGP2X"
			append_var CXXFLAGS "-march=armv4t"
			append_var ASFLAGS "-mfloat-abi=soft"
			append_var LDFLAGS "-static"
			_backend="gph"
			_build_hq_scalers=no
			_savegame_timestamp=no
			_vkeybd=yes
			_seq_midi=no
			_mt32emu=no
			_timidity=no
			_port_mk="backends/platform/gph/gp2x-bundle.mk"
			;;
		gp2xwiz)
			append_var DEFINES "-DGP2XWIZ"
			append_var CXXFLAGS "-mcpu=arm926ej-s"
			append_var CXXFLAGS "-mtune=arm926ej-s"
			append_var ASFLAGS "-mfloat-abi=soft"
			_backend="gph"
			_build_hq_scalers=no
			_savegame_timestamp=no
			_vkeybd=yes
			_seq_midi=no
			_mt32emu=no
			_timidity=no
			_port_mk="backends/platform/gph/gp2xwiz-bundle.mk"
			;;
		iphone)
			append_var DEFINES "-DIPHONE"
			append_var ASFLAGS "-arch armv6"
			_backend="iphone"
			_build_scalers=no
			_mt32emu=no
			_seq_midi=no
			_timidity=no
			;;
		ios7)
			append_var DEFINES "-DIPHONE"
			_backend="ios7"
			_seq_midi=no
			_timidity=no
			;;
		m68k-atari-mint)
			_seq_midi=no
			_timidity=no
			;;
		maemo)
			_optimization_level=-Os
			append_var CXXFLAGS "-mcpu=arm926ej-s"
			append_var CXXFLAGS "-fomit-frame-pointer"
			append_var INCLUDES "-I/usr/X11R6/include"
			append_var LIBS "-L/usr/lib"

			_backend="maemo"
			_vkeybd=yes
			_build_hq_scalers=no
			_mt32emu=no
			_alsa=no
			_mad=yes
			_tremor=yes
			_zlib=yes
			;;
		*mingw32*)
			_sdlconfig=$_host-sdl-config
			_windres=$_host-windres
			_ar="$_host-ar cr"
			_ranlib=$_host-ranlib
			;;
		mips-sgi*)
			append_var LDFLAGS "-static-libgcc"
			append_var LIBS "-laudio"
			;;
		n64)
			append_var CXXFLAGS "-mno-extern-sdata"
			append_var CXXFLAGS "--param max-inline-insns-auto=20"
			append_var CXXFLAGS "-fomit-frame-pointer"
			append_var CXXFLAGS "-march=vr4300"
			append_var CXXFLAGS "-mtune=vr4300"
			append_var CXXFLAGS "-mhard-float"
			append_var LDFLAGS "-march=vr4300"
			append_var LDFLAGS "-mtune=vr4300"
			append_var LDFLAGS "-nodefaultlibs"
			append_var LDFLAGS "-nostartfiles"
			append_var LDFLAGS "-mno-crt0"
			append_var LDFLAGS "-L$N64SDK/hkz-libn64"
			append_var LDFLAGS "-L$N64SDK/lib"
			append_var LDFLAGS "-T n64ld_cpp.x -Xlinker -Map -Xlinker residualvm.map"
			_backend="n64"
			_mt32emu=no
			_build_scalers=no
			_savegame_timestamp=no
			_translation=no
			_text_console=no
			_vkeybd=yes
			_dynamic_modules=no
			_plugins_default=static
			# Force use of libmad, libtremor and zlib
			_mad=no
			_tremor=yes
			_zlib=yes
			_port_mk="backends/platform/n64/n64.mk"
			;;
		neuros)
			append_var DEFINES "-DNEUROS"
			_backend='null'
			_build_hq_scalers=no
			_mt32emu=no
			;;
		openpandora)
			# Use -O3 on the OpenPandora for optimized builds.
			if test "$_optimizations" = yes; then
				_optimization_level=-O3
			fi

			append_var CXXFLAGS "-march=armv7-a"
			append_var CXXFLAGS "-mtune=cortex-a8"
			append_var CXXFLAGS "-mfloat-abi=softfp"
			append_var CXXFLAGS "-mfpu=neon"
			append_var CXXFLAGS "-fsingle-precision-constant"
			append_var ASFLAGS "-mfloat-abi=softfp"
			_backend="openpandora"
			_build_hq_scalers=yes
			_vkeybd=no
			_mt32emu=no
			_seq_midi=no
			_port_mk="backends/platform/openpandora/op-bundle.mk"
			;;
		ppc-amigaos)
			# PPC Linker requires this to fix relocation errors
			append_var CXXFLAGS "-mlongcall"

			# Only static builds link successfully on buildbot
			LDFLAGS=`echo $LDFLAGS | sed 's/-use-dynld//'`
			append_var LDFLAGS "-static"

			_port_mk="backends/platform/sdl/amigaos/amigaos.mk"
			;;
		ps2)
			append_var DEFINES "-DDISABLE_TEXT_CONSOLE"
			append_var DEFINES "-DDISABLE_COMMAND_LINE"
			append_var DEFINES "-DDISABLE_DOSBOX_OPL"
			append_var DEFINES "-DDISABLE_SID"
			append_var DEFINES "-DDISABLE_NES_APU"
			append_var CXXFLAGS "-fno-exceptions"
			append_var CXXFLAGS "-fno-rtti"
			_backend="ps2"
			_build_scalers=no
			_mt32emu=no
			_nuked_opl=no
			# HACK to enable mad & zlib (they are not properly detected due to linker issues).
			# This trick doesn't work for tremor right now, as the PS2 port the resulting library
			# libtremor, while our code later on expects it to be called libvorbisidec.
			# TODO: Enable tremor, e.g. by adding  -ltremor or by renaming the lib.
			# Disable this for older SDK as this breaks the build otherwise...
			if test -z "$PS2SDK_OLD" && test "$_tremor" = auto; then
				_tremor=yes
			fi
			_mad=yes
			_zlib=yes
			# HACK to fix compilation of C source files for now.
			add_line_to_config_mk 'CC := ee-gcc'
			add_line_to_config_mk 'CFLAGS := -std=c99 -W -Wno-unused-parameter -Wconversion -pedantic -G2 -s -O2 -Wuninitialized'
			# HACK to fix linking for now. It seems ee-g++ does not handle linking correctly.
			LD=ee-gcc

			if test "$_debug_build" = yes; then
				# TODO: Setup debug build properly
				append_var DEFINES "-D__PS2_DEBUG__"
				#append_var INCLUDES "-I$(PS2GDB)/ee"
				#append_var LDFLAGS "-L$(PS2GDB)/lib"
				append_var LDFLAGS "-lps2gdbStub"
				append_var LDFLAGS "-lps2ip"
				append_var LDFLAGS "-ldebug"
			else
				# If not building for debug mode, strip binaries.
				append_var CXXFLAGS "-s"
			fi
			;;
		ps3)
			_timidity=no
			_vkeybd=yes
			_port_mk="backends/platform/sdl/ps3/ps3.mk"
			;;
		psp2)
			_backend="psp2"
			_vkeybd=yes
			_build_scalers=yes
			_build_hq_scalers=no
			_mt32emu=no
			_timidity=no
			_port_mk="backends/platform/sdl/psp2/psp2.mk"
			#the -gcc- variants allow link time optimization
			_ar="$_host_alias-gcc-ar cru"
			_ranlib=$_host_alias-gcc-ranlib
			;;
		psp)
			_backend="psp"
			_build_scalers=no
			_mt32emu=no
			_port_mk="backends/platform/psp/psp.mk"
			;;
		samsungtv)
			append_var DEFINES "-DSAMSUNGTV"
			append_var DEFINES "-DDISABLE_COMMAND_LINE"
			append_var ASFLAGS "-mfpu=vfp"
			HOSTEXEEXT=".so"
			_backend="samsungtv"
			_mt32emu=no
			_vkeybd=yes
			;;
		switch)
			_backend="switch"
			# Switch port crashes when switching between SDL2 and OpenGL
			# graphics. But OpenGL works when it is enabled from the start.
			# This might be related to a known crash on OpenGL de-init due
			# to the OpenGL implementation on this platform.
			_opengl_mode=gles2
			_vkeybd=yes
			_port_mk="backends/platform/sdl/switch/switch.mk"
			;;
		tizen)
			_unix=yes
			_backend="tizen"
			_port_mk="backends/platform/tizen/tizen.mk"
			_build_scalers=no
			_seq_midi=no
			_mt32emu=no
			_timidity=no
			_vkeybd=yes
			# Tizen relies on the OpenGL ES output thus we always enable it.
			_opengl_mode=gles
			;;
		webos)
			_backend="webos"
			_port_mk="backends/platform/webos/webos.mk"
			_build_scalers=yes
			_build_hq_scalers=no
			_timidity=no
			_mt32emu=no
			_seq_midi=no
			_vkeybd=no
			add_line_to_config_mk "HOST_COMPILER = `uname`"
			;;
		wii)
			_backend="wii"
			_build_scalers=no
			_vkeybd=yes
			_port_mk="backends/platform/wii/wii.mk"
			add_line_to_config_mk 'GAMECUBE = 0'
			add_line_to_config_h '#define AUDIO_REVERSE_STEREO'
			add_line_to_config_h "#define DEBUG_WII_USBGECKO"
			add_line_to_config_h "/* #define DEBUG_WII_MEMSTATS */"
			add_line_to_config_h "/* #define DEBUG_WII_GDB */"
			add_line_to_config_h "#define USE_WII_DI"
			add_line_to_config_h "#define USE_WII_SMB"
			add_line_to_config_h "#define USE_WII_KBD"
			;;
		*)
			echo "WARNING: Unknown target, continuing with auto-detected values"
			;;
	esac
fi

#
# Backend related stuff
#
case $_backend in
	3ds)
		;;
	android)
		append_var DEFINES "-DREDUCE_MEMORY_USAGE"
		append_var DEFINES "-DNONSTANDARD_PORT"
		append_var INCLUDES '-I$(srcdir)/backends/platform/android'
		append_var CXXFLAGS "-Wa,--noexecstack"
		append_var LDFLAGS "-Wl,-z,noexecstack"
		# removed the following directive - was causing compilation issues when not also explicitly using --disable-mt32emu
		# append_var INCLUDES "-isystem $ANDROID_NDK/sources/cxx-stl/system/include"
		_sdl=no
		if test "$_host" = ouya; then
			_sdlnet=no
		fi
		;;
	androidsdl)
		_sdl=auto
		;;
	dc)
		append_var INCLUDES '-I$(srcdir)/backends/platform/dc'
		append_var INCLUDES "-isystem $RONINDIR/include"
		append_var LDFLAGS "-Wl,-Ttext,0x8c010000"
		append_var LDFLAGS "-nostartfiles"
		append_var LDFLAGS "-L$RONINDIR/lib"
		append_var LDFLAGS "$RONINDIR/lib/crt0.o"
		# Enable serial debugging output only when --enable-debug is passed
		if test "$_release_build" = yes -o "$_debug_build" != yes; then
			append_var LIBS "-lronin-noserial -lm"
			append_var LDFLAGS "-lronin-noserial -lm"
		else
			append_var LIBS "-lronin -lm"
			append_var LDFLAGS "-lronin -lm"
		fi
		;;
	dingux)
		append_var DEFINES "-DDINGUX"
		_sdlconfig=sdl-config
		_sdl=auto
		;;
	ds)
		append_var INCLUDES '-I$(srcdir)/backends/platform/ds/arm9/source'
		append_var INCLUDES '-I$(srcdir)/backends/platform/ds/commoninclude'
		append_var INCLUDES '-Ibackends/platform/ds/arm9/data'
		;;
	gph)
		# On the GPH devices we want fancy themes but do not want the load/save thumbnail grid.
		append_var DEFINES "-DDISABLE_SAVELOADCHOOSER_GRID"
		append_var DEFINES "-DGPH_DEVICE"
		append_var DEFINES "-DREDUCE_MEMORY_USAGE"
		if test "$_debug_build" = yes; then
			append_var DEFINES "-DGPH_DEBUG"
		fi
		_sdlconfig=sdl-config
		_sdl=auto
		;;
	iphone)
		append_var LIBS "-lobjc -framework UIKit -framework CoreGraphics -framework OpenGLES"
		append_var LIBS "-framework QuartzCore -framework CoreFoundation -framework Foundation"
		append_var LIBS "-framework AudioToolbox -framework CoreAudio"
		;;
	ios7)
		append_var LIBS "-lobjc -framework UIKit -framework CoreGraphics -framework OpenGLES"
		append_var LIBS "-framework QuartzCore -framework CoreFoundation -framework Foundation"
		append_var LIBS "-framework AudioToolbox -framework CoreAudio -framework SystemConfiguration "
		append_var LDFLAGS "-miphoneos-version-min=7.1 -arch armv7"
		append_var CFLAGS "-miphoneos-version-min=7.1 -arch armv7"
		append_var CXXFLAGS "-miphoneos-version-min=7.1 -arch armv7"
		if test -n "$SDKROOT"; then
			append_var LDFLAGS "-mlinker-version=134.9 -B/usr/local/bin/arm-apple-darwin11-"
			append_var CFLAGS "-isysroot $SDKROOT -F$SDKROOT/System/Library/Frameworks"
			append_var CXXFLAGS "-isysroot $SDKROOT -I$SDKROOT/usr/include/c++/4.2.1 -F$SDKROOT/System/Library/Frameworks"
		fi
		;;
	maemo)
		append_var DEFINES "-DMAEMO"
		append_var LIBS "-lX11"
		_sdlconfig=sdl-config
		_sdl=auto
		;;
	n64)
		append_var INCLUDES '-I$(N64SDK)/include'
		append_var INCLUDES '-I$(N64SDK)/mips64/include'
		append_var INCLUDES '-I$(N64SDK)/hkz-libn64'
		append_var INCLUDES '-I$(srcdir)/backends/platform/n64'
		append_var LIBS "-lpakfs -lframfs -ln64 -ln64utils -lromfs"
		append_var LIBS "-lm -lstdc++ -lz"
		;;
	null)
		append_var DEFINES "-DUSE_NULL_DRIVER"
		;;
	openpandora)
		append_var DEFINES "-DOPENPANDORA"
		append_var DEFINES "-DREDUCE_MEMORY_USAGE"
		if test "$_release_build" = no; then
			append_var DEFINES "-DOP_DEBUG"
		fi
		_sdl=auto
		;;
	ps2)
		append_var DEFINES "-D_EE"
		append_var DEFINES "-DFORCE_RTL"
		append_var INCLUDES "-I$PS2SDK/ee/include"
		append_var INCLUDES "-I$PS2SDK/common/include"
		append_var INCLUDES "-I$PS2SDK/ports/include"
		if test "$_dynamic_modules" = no ; then
			append_var LDFLAGS "-mno-crt0"
			append_var LDFLAGS "$PS2SDK/ee/startup/crt0.o"
			append_var LDFLAGS "-T $PS2SDK/ee/startup/linkfile"
		fi
		append_var LDFLAGS "-L$PS2SDK/ee/lib"
		append_var LDFLAGS "-L$PS2SDK/ports/lib"
		if test -d "$PS2DEV/isjpcm"; then
			append_var INCLUDES "-I$PS2DEV/isjpcm/include"
			append_var LDFLAGS "-L$PS2DEV/isjpcm/lib"
		fi
		append_var LIBS "-lmc -lpad -lmouse -lhdd -lpoweroff -lsjpcm"
		append_var LIBS "-lm -lc -lfileXio -lkernel -lstdc++"
		;;
	psp)
		append_var DEFINES "-D__PSP__"
		append_var DEFINES "-DDISABLE_COMMAND_LINE"
		append_var DEFINES "-DDISABLE_DOSBOX_OPL"
		append_var LIBS "-lpng"
		append_var LIBS "-Wl,-Map,mapfile.txt"
		_nuked_opl=no
		;;
	psp2)
		append_var LIBS "-lvitashaders -lSDL2 -lvita2d_fbo -lSceCommonDialog_stub"
		append_var LIBS "-lSceSysmodule_stub -lSceDisplay_stub -lSceGxm_stub"
		append_var LIBS "-lSceAudio_stub -lSceCtrl_stub -lScePower_stub"
		append_var LIBS "-lSceNet_stub -lSceNetCtl_stub -lSceAppMgr_stub -lScePgf_stub"
		append_var LIBS "-lSceTouch_stub -lSceHid_stub"
		_sdl=yes
		_sdlversion=2.0.0
		append_var MODULES "backends/platform/sdl"
		append_var INCLUDES "-I$VITASDK/arm-vita-eabi/include/SDL2"
		;;
	samsungtv)
		append_var DEFINES "-DSAMSUNGTV"
		append_var LDFLAGS "-shared"
		append_var LDFLAGS "-fpic"
		_sdl=auto
		;;
	sdl)
		_sdl=auto
		;;
	switch)
		_sdl=auto
		append_var MODULES "backends/platform/sdl"
		;;
	tizen)
		# dirent.h not available. NONSTANDARD_PORT==ensure portdefs.h is included
		append_var DEFINES "-DTIZEN -DDISABLE_STDIO_FILESTREAM -DNONSTANDARD_PORT"
		append_var DEFINES "-DNO_STDERR_STDOUT"
		append_var DEFINES "-DDISABLE_COMMAND_LINE"
		append_var INCLUDES '-I$(srcdir)/backends/platform/tizen'
		append_var INCLUDES '-I$(TIZEN_ROOTSTRAP)/usr/include'
		append_var INCLUDES '-I$(TIZEN_ROOTSTRAP)/usr/include/osp'
		if test "$_debug_build" = yes; then
			append_var CXXFLAGS "-D_DEBUG -DBUILD_DLL -O0 -g3"
		fi
		# created a shared library for inclusion via the eclipse build
		append_var CXXFLAGS "-Wno-psabi"
		append_var CXXFLAGS "--sysroot=${TIZEN_ROOTSTRAP}"
		append_var CXXFLAGS "-fmessage-length=0"
		append_var CXXFLAGS "-fPIC"
		HOSTEXEPRE=lib
		HOSTEXEEXT=.a
		;;
	webos)
		# There is no sdl-config in the WebOS PDK so we don't use find_sdlconfig here.
		# The PDL library acts as the WebOS device toolchain, and is required to control the virtual keyboard among other OS-level events.
		append_var LIBS "-lSDL -lpdl"
		append_var DEFINES "-DWEBOS"
		append_var MODULES "backends/platform/sdl"
		_sdl=yes
		_sdlversion=1.2.0
		;;
	wii)
		append_var DEFINES "-D__WII__"
		append_var DEFINES "-DGEKKO"
		case $_host_os in
		gamecube)
			append_var LIBS "-lgxflux -liso9660 -lfat -logc -ldb"
			;;
		*)
			append_var LIBS "-lgxflux -ldi -liso9660 -ltinysmb -lfat -lwiiuse -lbte -logc -lwiikeyboard -ldb"
			;;
		esac
		;;
	*)
		echo "support for $_backend backend not implemented in configure script yet"
		exit 1
		;;
esac


append_var MODULES "backends/platform/$_backend"

#
# Check for pkg-config
#
echocheck "pkg-config"
_pkg_config=no
command -v $_pkgconfig >/dev/null 2>&1 && _pkg_config=yes
echo "$_pkg_config"

if test "$_pkg_config" = yes && test -n "$_host" && test -z "$PKG_CONFIG_LIBDIR"; then
	echo "WARNING: When cross-compiling PKG_CONFIG_LIBDIR must be set to the location of the .pc files for the target"
fi

#
# Setup SDL specifics for SDL based backends
#
if test "$_sdl" = auto ; then
	find_sdlconfig
	append_var SDL_CFLAGS "`$_sdlconfig --prefix="$_sdlpath" --cflags`"
	if test "$_static_build" = yes ; then
		append_var SDL_LIBS "`$_sdlconfig --prefix="$_sdlpath" --static-libs`"
	else
		append_var SDL_LIBS "`$_sdlconfig --prefix="$_sdlpath" --libs`"
	fi
	_sdlversion=`$_sdlconfig --version`

	echocheck "SDL"
	_sdl=no
	cat > $TMPC << EOF
#include "SDL.h"
int main(int argc, char *argv[]) { SDL_Init(0); return 0; }
EOF
	cc_check $LIBS $SDL_LIBS $INCLUDES $SDL_CFLAGS && _sdl=yes
	echo "$_sdl"
	if test "$_sdl" = no ; then
		exit 1
	fi
fi

_sdlMajorVersionNumber=0
if test "$_sdl" = yes ; then
	append_var DEFINES "-DSDL_BACKEND"
	add_line_to_config_mk "SDL_BACKEND = 1"
	append_var INCLUDES "$SDL_CFLAGS"
	append_var LIBS "$SDL_LIBS"
	case $_sdlversion in
		2.0.*)
			add_line_to_config_mk "USE_SDL2 = 1"
			_sdlMajorVersionNumber=2
			;;
		*)
			_sdlMajorVersionNumber=1
			;;
	esac
fi

#
# Some platforms (eg. Android, iOS) may use an edited version
# of SDL-net or SDL2-net that does not require SDL or SDL2 respectively
#
if test "$_sdlnet" = auto ; then
	# If SDL2 was detected, then test for SDL2_net exclusively
	# If SDL was detected, then test for SDL_net exclusively
	# If neither SDL nor SDL2 detected, then test for both (SDL2_net success takes priority)
	set_var SDL2_NET_LIBS   "$SDL_NET_LIBS"
	set_var SDL2_NET_CFLAGS "$SDL_NET_CFLAGS"
	set_var SDL1_NET_LIBS   "$SDL_NET_LIBS"
	set_var SDL1_NET_CFLAGS "$SDL_NET_CFLAGS"

	if test "$_sdl" = no || test "$_sdlMajorVersionNumber" = 2; then
		if test "$_pkg_config" = "yes" && $_pkgconfig --exists SDL2_net; then
			append_var SDL2_NET_LIBS "`$_pkgconfig --libs SDL2_net`"
			append_var SDL2_NET_CFLAGS "`$_pkgconfig --cflags SDL2_net`"
		else
			append_var SDL2_NET_LIBS "-lSDL2_net"
		fi
	fi

	if test "$_sdl" = no || test "$_sdlMajorVersionNumber" = 1; then
		if test "$_pkg_config" = "yes" && $_pkgconfig --exists SDL_net; then
			append_var SDL1_NET_LIBS "`$_pkgconfig --libs SDL_net`"
			append_var SDL1_NET_CFLAGS "`$_pkgconfig --cflags SDL_net`"
		else
			append_var SDL1_NET_LIBS "-lSDL_net"
		fi
	fi

	# Check for SDL_Net
	echocheck "SDL_Net"
	_sdlnet=no
	cat > $TMPC << EOF
#include "SDL_net.h"
int main(int argc, char *argv[]) { SDLNet_Init(); return 0; }
EOF

	cc_check $SDL2_NET_LIBS $LIBS $INCLUDES $SDL2_NET_CFLAGS && _sdlnet=yes
	if test "$_sdlnet" = yes ; then
		set_var SDL_NET_LIBS   "$SDL2_NET_LIBS"
		set_var SDL_NET_CFLAGS "$SDL2_NET_CFLAGS"
	else
		cat > $TMPC << EOF
#include "SDL_net.h"
int main(int argc, char *argv[]) { SDLNet_Init(); return 0; }
EOF
		cc_check $SDL1_NET_LIBS $LIBS $INCLUDES $SDL1_NET_CFLAGS && _sdlnet=yes
		set_var SDL_NET_LIBS   "$SDL1_NET_LIBS"
		set_var SDL_NET_CFLAGS "$SDL1_NET_CFLAGS"
	fi

	if test "$_sdlnet" = yes ; then
		# Some platforms require SDL to be after SDL_Net, thus we prepend var
		prepend_var LIBS "$SDL_NET_LIBS"
		append_var INCLUDES "$SDL_NET_CFLAGS"
	fi
	define_in_config_if_yes "$_sdlnet" 'USE_SDL_NET'
	echo "$_sdlnet"
fi


#
# Enable 16bit support only for backends which support it
#
case $_backend in
	3ds | android | androidsdl | dingux | dc | gph | iphone | ios7 | maemo | openpandora | psp | psp2 | samsungtv | sdl | switch | tizen | webos | wii)
		if test "$_16bit" = auto ; then
			_16bit=yes
		else
			_16bit=no
		fi
		;;
	*)
		_16bit=no
		;;
esac

#
# Enable High resolution engines (>320x240) support only for backends which support it
#
case $_host in
	ds | gcw0)
		if test "$_highres" = yes ; then
			_highres=yes
		else
			_highres=no
		fi
		;;
	*)
		if test "$_highres" = no ; then
			_highres=no
		else
			_highres=yes
		fi
		;;
esac

#
# Enable Event Recorder only for backends that support it
#
case $_backend in
	sdl)
		;;
	*)
		_eventrec=no
		;;
esac

#
# Disable savegame timestamp support for backends which don't have a reliable real time clock
#
case $_backend in
	gph | n64)
		if test "$_savegame_timestamp" = auto ; then
			_savegame_timestamp=no
		else
			_savegame_timestamp=yes
		fi
		;;
	*)
		if test "$_savegame_timestamp" = auto ; then
			_savegame_timestamp=yes
		else
			_savegame_timestamp=no
		fi
		;;
esac

#
# Determine whether host is POSIX compliant, or at least POSIX
# compatible enough to support our POSIX code (including dlsym(),
# mkdir() and some other APIs).
#
# TODO: Instead of basing this on the host name, we should really base
# this on the presence of features (such as the dlsym and mkdir APIs).
#
echo_n "Checking if host is POSIX compliant... "
case $_host_os in
	amigaos* | cygwin* | dreamcast | ds | gamecube | mingw* | n64 | ps2 | ps3 | psp2 | psp | riscos | wii)
		_posix=no
		;;
	3ds | android | androidsdl | beos* | bsd* | darwin* | freebsd* | gnu* | gph-linux | haiku* | hpux* | iphone | ios7 | irix*| k*bsd*-gnu* | linux* | maemo | mint* | netbsd* | openbsd* | solaris* | sunos* | switch | uclinux* | webos)
		_posix=yes
		;;
	os2-emx*)
		_posix=yes	# FIXME: Really???
		;;
	*)
		# given this is a shell script, we might assume some type of posix.
		# However, the host system might be a totally different one, so
		# we can assume nothing about it.
		# Indeed, as mentioned further above, we really should test for the
		# presences of relevant APIs on the host anyway...
		_posix=no
		;;
esac
echo $_posix

if test "$_posix" = yes ; then
	append_var DEFINES "-DPOSIX"
	add_line_to_config_mk 'POSIX = 1'

	echo_n "Checking if posix_spawn is supported... "
		cat > $TMPC << EOF
#include <spawn.h>
int main(void) { return posix_spawn(0, 0, 0, 0, 0, 0); }
EOF
	cc_check && _has_posix_spawn=yes
	echo $_has_posix_spawn
	if test "$_has_posix_spawn" = yes ; then
		append_var DEFINES "-DHAS_POSIX_SPAWN"
	fi
fi

#
# Check whether to enable a verbose build
#
echo_n "Checking whether to have a verbose build... "
echo "$_verbose_build"
add_to_config_mk_if_yes "$_verbose_build" 'VERBOSE_BUILD = 1'


#
# If a specific optimization level was requested, enable optimizations
#
if test -n "$_optimization_level" ; then
	# Ports will specify an optimization level and expect that to be enabled
	if test "$_optimizations" != no ; then
		_optimizations=yes
	fi
else
	_optimization_level=$_default_optimization_level
fi

#
# Check whether to enable optimizations
#
if test "$_optimizations" = yes ; then
	# Enable optimizations. This also
	# makes it possible to use -Wuninitialized, so let's do that.
	append_var CXXFLAGS "$_optimization_level"
	append_var CXXFLAGS "-Wuninitialized"
fi

#
# Check whether plugin support is requested and possible
#
echo_n "Checking whether building plugins was requested... "
echo "$_dynamic_modules"
_mak_plugins=

if test "$_dynamic_modules" = yes ; then
	echo_n "Checking whether building plugins is supported... "
	case $_host_os in
	3ds)
		_elf_loader=yes
		append_var DEFINES "-DUNCACHED_PLUGINS"
_mak_plugins='
PLUGIN_LDFLAGS		+= -Wl,-T$(srcdir)/backends/plugins/3ds/plugin.ld -march=armv6k -mfloat-abi=hard
'
		;;
	amigaos)
		_plugin_prefix="lib"
		_plugin_suffix=".so"
		append_var CXXFLAGS "-fPIC"
		append_var LIBS "-use-dynld"
_mak_plugins='
PLUGIN_EXTRA_DEPS =
PLUGIN_LDFLAGS  += -shared
PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
POST_OBJS_FLAGS := -Wl,-no-whole-archive
'
		;;
	android)
		_plugin_prefix="lib"
		_plugin_suffix=".so"
		append_var CXXFLAGS "-fpic"
		append_var LIBS "-ldl"
# Work around an Android 2.0+ run-time linker bug:
# The linker doesn't actually look in previously
# loaded libraries when trying to resolve symbols -
# effectively turning all dlopen(RTLD_GLOBAL) calls
# into dlopen(RTLD_LOCAL).  It *does* look in
# DT_NEEDED libraries, so the workaround is to add an
# (otherwise unnecessary) dependency from plugins back
# to the main libscummvm.so.
_mak_plugins='
PLUGIN_EXTRA_DEPS = libresidualvm.so
PLUGIN_LDFLAGS  += $(LDFLAGS) -L. -lresidualvm
PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
POST_OBJS_FLAGS := -Wl,-no-whole-archive
'
		;;
	darwin*)
		_plugin_prefix=""
		_plugin_suffix=".plugin"
		append_var LIBS "-ldl"
_mak_plugins='
PLUGIN_EXTRA_DEPS = $(EXECUTABLE)
PLUGIN_LDFLAGS  += -bundle -bundle_loader $(EXECUTABLE) -exported_symbols_list "$(srcdir)/plugin.exp"
PRE_OBJS_FLAGS  := -all_load
POST_OBJS_FLAGS :=
'
		;;
	dreamcast)
		_plugin_prefix=""
		_plugin_suffix=".plg"
_mak_plugins='
PLUGIN_EXTRA_DEPS	= $(abspath $(srcdir)/backends/platform/dc/plugin.x $(srcdir)/backends/platform/dc/plugin.syms) $(EXECUTABLE) backends/platform/dc/plugin_head.o
PLUGIN_LDFLAGS		= -ml -m4-single-only -nostartfiles -Wl,-q,-T$(srcdir)/backends/platform/dc/plugin.x,--just-symbols,$(EXECUTABLE),--retain-symbols-file,$(srcdir)/backends/platform/dc/plugin.syms backends/platform/dc/plugin_head.o
PRE_OBJS_FLAGS		:= -Wl,--whole-archive
POST_OBJS_FLAGS		:= -Wl,--no-whole-archive
'
		;;
	ds)
		_elf_loader=yes
		append_var DEFINES "-DELF_LOADER_CXA_ATEXIT"
		append_var DEFINES "-DUNCACHED_PLUGINS"
		append_var DEFINES "-DELF_NO_MEM_MANAGER"
_mak_plugins='
PLUGIN_LDFLAGS		+= -Wl,-T$(srcdir)/backends/plugins/ds/plugin.ld -mthumb-interwork -mfloat-abi=soft
'
		;;
	freebsd*)
		_plugin_prefix="lib"
		_plugin_suffix=".so"
		append_var CXXFLAGS "-fPIC"
_mak_plugins='
PLUGIN_EXTRA_DEPS =
PLUGIN_LDFLAGS  += -shared
PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
POST_OBJS_FLAGS := -Wl,-no-whole-archive
'
		;;
	gamecube | wii)
		_elf_loader=yes
		append_var DEFINES "-DELF_LOADER_CXA_ATEXIT"
		append_var DEFINES "-DUNCACHED_PLUGINS"
_mak_plugins='
PLUGIN_LDFLAGS		+= -Wl,-T$(srcdir)/backends/plugins/wii/plugin.ld
'
		;;
	gph*)
		_plugin_prefix=""
		_plugin_suffix=".plugin"
		append_var CXXFLAGS "-fpic"
		append_var LIBS "-ldl"
_mak_plugins='
PLUGIN_EXTRA_DEPS = $(EXECUTABLE)
PLUGIN_LDFLAGS  += -shared
PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
POST_OBJS_FLAGS := -Wl,-no-whole-archive
'
		;;
	irix*)
		_plugin_prefix="lib"
		_plugin_suffix=".so"
		append_var CXXFLAGS "-fpic"
		append_var LIBS "-ldl"
_mak_plugins='
PLUGIN_EXTRA_DEPS =
PLUGIN_LDFLAGS  += -shared -static-libgcc
PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
POST_OBJS_FLAGS := -Wl,-no-whole-archive
'
		;;

	linux* | gnu* | k*bsd*-gnu*)
		_plugin_prefix="lib"
		_plugin_suffix=".so"
		append_var CXXFLAGS "-fPIC"
		append_var LIBS "-ldl"
_mak_plugins='
PLUGIN_EXTRA_DEPS =
PLUGIN_LDFLAGS  += -shared
PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
POST_OBJS_FLAGS := -Wl,-no-whole-archive
'
		;;
	*mingw32* | mingw64)
		_plugin_prefix=""
		_plugin_suffix=".dll"
_mak_plugins='
PLUGIN_EXTRA_DEPS	= $(EXECUTABLE)
PLUGIN_LDFLAGS		:= -Wl,--enable-auto-import -shared ./libresidualvm.a
PRE_OBJS_FLAGS		:= -Wl,--whole-archive
POST_OBJS_FLAGS		:= -Wl,--export-all-symbols -Wl,--no-whole-archive -Wl,--out-implib,./libresidualvm.a
'
		;;
	ps2)
		_elf_loader=yes
		append_var DEFINES "-DUNCACHED_PLUGINS"
_mak_plugins='
LDFLAGS         += -mno-crt0 $(PS2SDK)/ee/startup/crt0.o -Wl,-T$(srcdir)/backends/plugins/ps2/main_prog.ld
PLUGIN_LDFLAGS  += -mno-crt0 $(PS2SDK)/ee/startup/crt0.o -Wl,-T$(srcdir)/backends/plugins/ps2/plugin.ld -lstdc++ -lc
'
		;;
	psp)
		_elf_loader=yes
		append_var DEFINES "-DUNCACHED_PLUGINS"
_mak_plugins='
LDFLAGS				+= -Wl,-T$(srcdir)/backends/plugins/psp/main_prog.ld
PLUGIN_LDFLAGS		+= -Wl,-T$(srcdir)/backends/plugins/psp/plugin.ld -lstdc++ -lc
'
		;;
	webos)
		_plugin_prefix="lib"
		_plugin_suffix=".so"
		append_var CXXFLAGS "-fpic"
		append_var LIBS "-ldl"
_mak_plugins='
PLUGIN_EXTRA_DEPS =
PLUGIN_LDFLAGS  += -shared $(LDFLAGS)
PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
POST_OBJS_FLAGS := -Wl,-no-whole-archive
'
		;;
	*)
		_dynamic_modules=no
		_mak_plugins=
		;;
	esac
	echo "$_dynamic_modules"
fi

#
# Check whether integrated ELF loader support is requested
#
define_in_config_if_yes "$_elf_loader" 'USE_ELF_LOADER'

if test "$_elf_loader" = yes; then
	_plugin_prefix=""
	_plugin_suffix=".plg"
	_mak_plugins='
PLUGIN_EXTRA_DEPS	= $(EXECUTABLE)
PLUGIN_LDFLAGS		= -nostartfiles backends/plugins/elf/version.o -Wl,-q,--just-symbols,$(EXECUTABLE),--retain-symbols-file,$(srcdir)/backends/plugins/elf/plugin.syms
PRE_OBJS_FLAGS		:= -Wl,--whole-archive
POST_OBJS_FLAGS		:= -Wl,--no-whole-archive
'"$_mak_plugins"
fi

#
# Set up some common plugin settings in config.h and config.mk, if enabled
#
define_in_config_if_yes "$_dynamic_modules" 'DYNAMIC_MODULES'

if test "$_dynamic_modules" = yes ; then
	add_line_to_config_h "#define PLUGIN_PREFIX	\"$_plugin_prefix\""
	add_line_to_config_h "#define PLUGIN_SUFFIX	\"$_plugin_suffix\""
	add_line_to_config_mk "PLUGIN_PREFIX := $_plugin_prefix"
	add_line_to_config_mk "PLUGIN_SUFFIX := $_plugin_suffix"
fi


#
# Check whether integrated MT-32 emulator support is requested
#
define_in_config_if_yes "$_mt32emu" 'USE_MT32EMU'

#
# Check whether Lua support is requested
#
define_in_config_if_yes "$_lua" 'USE_LUA'

#
# Check whether Nuked OPL emulator support is disabled
#
define_in_config_if_no "$_nuked_opl" 'DISABLE_NUKED_OPL'

#
# Check whether 16bit color support is requested
#
define_in_config_if_yes "$_16bit" 'USE_RGB_COLOR'

#
# Check whether High resolution graphics support is requested
#
define_in_config_if_yes "$_highres" 'USE_HIGHRES'

#
# Check whether save games use the current time as default description
#
define_in_config_if_yes "$_savegame_timestamp" 'USE_SAVEGAME_TIMESTAMP'

#
# Check whether to enable the (hq) scalers
#
if test "$_build_scalers" = no ; then
	_build_hq_scalers=no
fi
define_in_config_if_yes "$_build_scalers" 'USE_SCALERS'

define_in_config_if_yes "$_build_hq_scalers" 'USE_HQ_SCALERS'

#
# Check for math lib
#
cat > $TMPC << EOF
int main(void) { return 0; }
EOF
cc_check -lm && append_var LIBS "-lm"

#
# Check for Ogg
#
echocheck "Ogg"
if test "$_ogg" = auto ; then
	_ogg=no
	cat > $TMPC << EOF
#include <ogg/ogg.h>
int main(void) { return 0; }
EOF
	cc_check $OGG_CFLAGS $OGG_LIBS -logg && _ogg=yes
fi
define_in_config_if_yes "$_ogg" 'USE_OGG'
echo "$_ogg"
#
# Check for TTS
#
echocheck "TTS libraries"
if test "$_tts" = auto ; then
	_tts=no
	case $_host_os in
		mingw*)
			cat > $TMPC << EOF
#include <windows.h>
#include <Servprov.h>
#include <sapi.h>
int main(void) { return 0; }
EOF
			cc_check -lsapi -lole32 && _tts=yes
			;;
		linux*)
			cat > $TMPC << EOF
#include <speech-dispatcher/libspeechd.h>
int main(void) { return 0; }
EOF
			cc_check -lspeechd && _tts=yes
			;;
		darwin*)
			# Check the API is available. The most recent API we need is for the NSSpeechSynthesizerDelegate protocole
			cat > $TMPC << EOF
#include <AppKit/NSSpeechSynthesizer.h>
@interface SpeechDelegate : NSObject<NSSpeechSynthesizerDelegate> {
}
@end
int main(void) { return 0; }
EOF
			cc_check -ObjC++ -lobjc && _tts=yes
			;;
	esac
fi
echo "$_tts"

#
# Check for Vorbis
#
echocheck "Vorbis"
if test "$_vorbis" = auto ; then
	_vorbis=no
	cat > $TMPC << EOF
#include <vorbis/codec.h>
int main(void) { vorbis_packet_blocksize(0,0); return 0; }
EOF
	if test "$_ogg" = yes ; then
		cc_check $OGG_CFLAGS $OGG_LIBS $VORBIS_CFLAGS $VORBIS_LIBS \
			-lvorbisfile -lvorbis -logg && _vorbis=yes
	else
		cc_check $VORBIS_CFLAGS $VORBIS_LIBS \
			-lvorbisfile -lvorbis && _vorbis=yes
	fi
fi
if test "$_vorbis" = yes ; then
	append_var LIBS "$VORBIS_LIBS -lvorbisfile -lvorbis"
	append_var INCLUDES "$VORBIS_CFLAGS"
fi
define_in_config_if_yes "$_vorbis" 'USE_VORBIS'
echo "$_vorbis"

#
# Check for Tremor
#
echocheck "Tremor"
if test "$_tremolo" = yes ; then
	_tremor=yes
fi

if test "$_tremor" = auto ; then
	_tremor=no
	cat > $TMPC << EOF
#include <tremor/ivorbiscodec.h>
int main(void) { vorbis_info_init(0); return 0; }
EOF
	if test "$_ogg" = yes ; then
		cc_check $TREMOR_CFLAGS $TREMOR_LIBS $OGG_CFLAGS $OGG_LIBS \
			-lvorbisidec -logg && _tremor=yes
	else
		cc_check $TREMOR_CFLAGS $TREMOR_LIBS -lvorbisidec && \
		_tremor=yes
	fi
fi
if test "$_tremor" = yes && test "$_vorbis" = no; then
	add_line_to_config_h '#define USE_TREMOR'
	add_line_to_config_h '#define USE_VORBIS'
	if test "$_tremolo" = yes ; then
		add_line_to_config_h '#define USE_TREMOLO'
		append_var LIBS "$TREMOR_LIBS -ltremolo"
	elif test "$_host" = ps2 ; then
		LIBS="-ltremor $LIBS"
	else
		append_var LIBS "$TREMOR_LIBS -lvorbisidec"
	fi
	append_var INCLUDES "$TREMOR_CFLAGS"
else
	if test "$_vorbis" = yes; then
		_tremor="no (Vorbis/Tremor support is mutually exclusive)"
	fi
	add_line_to_config_h '#undef USE_TREMOR'
fi
add_to_config_mk_if_yes "$_tremor" 'USE_TREMOR = 1'
echo "$_tremor"

#
# Check for IEEE1284 for OPL2lPT
#
echocheck "OPL2LPT"
if test "$_opl2lpt" = yes ; then
	_opl2lpt=no
	cat > $TMPC << EOF
#include <ieee1284.h>
struct parport_list parports;
int main(void) { ieee1284_find_ports(&parports, 0); return 0; }
EOF
	cc_check $IEEE1284_CFLAGS $IEEE1284_LIBS -lieee1284 && \
	_opl2lpt=yes
fi
if test "$_opl2lpt" = yes; then
	append_var LIBS "$IEEE1284_LIBS -lieee1284"
	append_var INCLUDES "$IEEE1284_CFLAGS"
fi
define_in_config_if_yes "$_opl2lpt" 'ENABLE_OPL2LPT'
echo "$_opl2lpt"

#
# Check for FLAC
#
echocheck "FLAC >= 1.0.1"
if test "$_flac" = auto ; then
	_flac=no
	cat > $TMPC << EOF
#include <FLAC/stream_decoder.h>
#include <FLAC/format.h>
int main(void) {
	FLAC__StreamDecoder *decoder = FLAC__stream_decoder_new();
	FLAC__stream_decoder_delete(decoder);
	return FLAC__STREAM_SYNC_LEN >> 30; /* guaranteed to be 0 */
}
EOF
	if test "$_ogg" = yes ; then
		cc_check $FLAC_CFLAGS $FLAC_LIBS $OGG_CFLAGS $OGG_LIBS \
			-lFLAC -logg && _flac=yes
	else
		cc_check $FLAC_CFLAGS $FLAC_LIBS \
			-lFLAC && _flac=yes
	fi
fi
if test "$_flac" = yes ; then
	append_var LIBS "$FLAC_LIBS -lFLAC"
	append_var INCLUDES "$FLAC_CFLAGS"
fi
define_in_config_if_yes "$_flac" 'USE_FLAC'
echo "$_flac"

# Add the link to ogg only after vorbis, tremor and flac as it might be used by those.
if test "$_ogg" = yes ; then
	append_var LIBS "$OGG_LIBS -logg"
	append_var INCLUDES "$OGG_CFLAGS"
fi

#
# Check for MAD (MP3 library)
#
echocheck "MAD"
if test "$_mad" = auto ; then
	_mad=no
	cat > $TMPC << EOF
#include <mad.h>
int main(void) { return 0; }
EOF
	cc_check $MAD_CFLAGS $MAD_LIBS -lmad && _mad=yes
fi
if test "$_mad" = yes ; then
	append_var LIBS "$MAD_LIBS -lmad"
	append_var INCLUDES "$MAD_CFLAGS"
fi
define_in_config_if_yes "$_mad" 'USE_MAD'
echo "$_mad"

#
# Check for ALSA
#
echocheck "ALSA >= 0.9"
if test "$_alsa" = auto ; then
	_alsa=no
	cat > $TMPC << EOF
#include <alsa/asoundlib.h>
int main(void) { return (!(SND_LIB_MAJOR==0 && SND_LIB_MINOR==9)); }
EOF
	cc_check $ALSA_CFLAGS $ALSA_LIBS -lasound && _alsa=yes
fi
if test "$_alsa" = yes ; then
	append_var LIBS "$ALSA_LIBS -lasound"
	append_var INCLUDES "$ALSA_CFLAGS"
fi
define_in_config_if_yes "$_alsa" 'USE_ALSA'
echo "$_alsa"

#
# Check for libjpeg
#
echocheck "libjpeg >= v6b"
if test "$_jpeg" = auto ; then
	_jpeg=no
	cat > $TMPC << EOF
#include <stdio.h>
#include <jpeglib.h>
int main(void) {
#if JPEG_LIB_VERSION >= 62
#else
  syntax error
#endif
  return 0;
}
EOF
	cc_check $JPEG_CFLAGS $JPEG_LIBS -ljpeg && _jpeg=yes
fi
if test "$_jpeg" = yes ; then
	append_var LIBS "$JPEG_LIBS -ljpeg"
	append_var INCLUDES "$JPEG_CFLAGS"
fi
define_in_config_if_yes "$_jpeg" 'USE_JPEG'
echo "$_jpeg"

#
# Check for PNG
#
echocheck "PNG >= 1.2.8"
if test "$_pkg_config" = "yes" && $_pkgconfig --exists libpng; then
	append_var PNG_LIBS "`$_pkgconfig --libs libpng`"
	append_var PNG_CFLAGS "`$_pkgconfig --cflags libpng`"
else
	append_var PNG_LIBS "-lpng -lz"
fi
if test "$_png" = auto ; then
	_png=no
	cat > $TMPC << EOF
#include <png.h>
int main(void) {
#if PNG_LIBPNG_VER >= 10208
#else
  syntax error
#endif
  return 0;
}
EOF
	cc_check $PNG_CFLAGS $PNG_LIBS && _png=yes
fi
if test "$_png" = yes ; then
	append_var LIBS "$PNG_LIBS"
	append_var INCLUDES "$PNG_CFLAGS"
fi
define_in_config_if_yes "$_png" 'USE_PNG'
echo "$_png"

#
# Check for Theora Decoder
#
echocheck "libtheoradec >= 1.0"
if test "$_vorbis" = no && test "$_tremor" = no ; then
	echo "skipping. no vorbis"
	_theoradec=notsupported
fi
if test "$_theoradec" = auto ; then
	_theoradec=no
	cat > $TMPC << EOF
#include <theora/theoradec.h>
int main(void) { th_ycbcr_buffer yuv; th_decode_ycbcr_out(NULL, yuv);  }
EOF
	cc_check $THEORADEC_CFLAGS $THEORADEC_LIBS -ltheoradec && _theoradec=yes
fi
if test "$_theoradec" = yes ; then
	append_var LIBS "$THEORADEC_LIBS -ltheoradec"
	append_var INCLUDES "$THEORADEC_CFLAGS"
fi
define_in_config_if_yes "$_theoradec" 'USE_THEORADEC'
if test ! "$_theoradec" = notsupported ; then
	echo "$_theoradec"
fi

#
# Check for the AAC decoder
#
echocheck "libfaad"
if test "$_faad" = auto ; then
	_faad=no
	cat > $TMPC << EOF
#include <neaacdec.h>
int main(void) { NeAACDecGetCapabilities(); return 0; }
EOF
	cc_check $FAAD_CFLAGS $FAAD_LIBS -lfaad && _faad=yes
fi
if test "$_faad" = yes ; then
	append_var LIBS "$FAAD_LIBS -lfaad"
	append_var INCLUDES "$FAAD_CFLAGS"
fi
define_in_config_if_yes "$_faad" 'USE_FAAD'
echo "$_faad"

#
# Check for SEQ MIDI
#
echocheck "SEQ MIDI"
if test "$_seq_midi" = auto ; then
	# TODO: Test for /dev/sequencer presence? Or maybe just for /dev ?
	# For now, we just always enable it when "posix" mode is on (backends
	# that do not want it can disable it by setting _seq_midi=no).
	_seq_midi="$_posix"
fi
define_in_config_h_if_yes "$_seq_midi" 'USE_SEQ_MIDI'
echo "$_seq_midi"

#
# Check for sndio
#
echocheck "sndio"
if test "$_sndio" = auto ; then
	_sndio=no
	cat > $TMPC << EOF
#include <sndio.h>
int main(void) { struct sio_par par; sio_initpar(&par); return 0; }
EOF
	cc_check $SNDIO_CFLAGS $SNDIO_LIBS -lsndio && _sndio=yes
fi
if test "$_sndio" = yes ; then
	append_var LIBS "$SNDIO_LIBS -lsndio"
	append_var INCLUDES "$SNDIO_CFLAGS"
fi
define_in_config_h_if_yes "$_sndio" 'USE_SNDIO'
echo "$_sndio"

#
# Check for TiMidity(++)
#
echocheck "TiMidity"
if test "$_timidity" = auto ; then
	# TODO: Is there a good possibility of auto detecting whether we
	# should include TiMidity support? It can only be used on Unix
	# currently so we use that as "detection" for now.
	_timidity="$_posix"
fi
define_in_config_h_if_yes "$_timidity" 'USE_TIMIDITY'
echo "$_timidity"

#
# Check for ZLib
#
echocheck "zlib"
if test "$_zlib" = auto ; then
	_zlib=no
	cat > $TMPC << EOF
#include <string.h>
#include <zlib.h>
int main(void) { return strcmp(ZLIB_VERSION, zlibVersion()); }
EOF
	cc_check $ZLIB_CFLAGS $ZLIB_LIBS -lz && _zlib=yes
fi
if test "$_zlib" = yes ; then
	append_var ZLIB_LIBS "-lz"
	append_var LIBS "$ZLIB_LIBS"
	append_var INCLUDES "$ZLIB_CFLAGS"
fi
define_in_config_if_yes "$_zlib" 'USE_ZLIB'
echo "$_zlib"

#
# Check for LibMPEG2
#
echocheck "libmpeg2 >= 0.4.0"
if test "$_mpeg2" = auto ; then
	_mpeg2=no
	cat > $TMPC << EOF
typedef signed $type_1_byte int8_t;
typedef signed $type_2_byte int16_t;
typedef signed $type_4_byte int32_t;

typedef unsigned $type_1_byte uint8_t;
typedef unsigned $type_2_byte uint16_t;
typedef unsigned $type_4_byte uint32_t;

extern "C" {
#include <mpeg2dec/mpeg2.h>
}

int main(void) {
	#if MPEG2_RELEASE < MPEG2_VERSION(0, 4, 0)
	#error libmpeg2 version too low
	#endif

	/* mpeg2_state_t first appears in 0.4.0 */
	mpeg2_state_t state;

	return 0;
}
EOF

	if test -n "$_host"; then
		# don't execute while cross compiling
		cc_check $MPEG2_CFLAGS $MPEG2_LIBS -lmpeg2 && _mpeg2=yes
	else
		cc_check_no_clean $MPEG2_CFLAGS $MPEG2_LIBS -lmpeg2 && $TMPO$HOSTEXEEXT && _mpeg2=yes
		cc_check_clean
	fi
fi
if test "$_mpeg2" = yes ; then
	append_var INCLUDES "$MPEG2_CFLAGS"
	append_var LIBS "$MPEG2_LIBS -lmpeg2"
fi
define_in_config_if_yes "$_mpeg2" 'USE_MPEG2'
echo "$_mpeg2"

#
# Check for liba52
#
echocheck "liba52"
if test "$_a52" = auto ; then
	_a52=no
	cat > $TMPC << EOF
typedef signed $type_1_byte int8_t;
typedef signed $type_2_byte int16_t;
typedef signed $type_4_byte int32_t;

typedef unsigned $type_1_byte uint8_t;
typedef unsigned $type_2_byte uint16_t;
typedef unsigned $type_4_byte uint32_t;

extern "C" {
#include <a52dec/a52.h>
}

int main(void) {
	a52_state_t *state = a52_init(0);
	a52_free(state);
	return 0;
}
EOF

	if test -n "$_host"; then
		# don't execute while cross compiling
		cc_check $A52_CFLAGS $A52_LIBS -la52 && _a52=yes
	else
		cc_check_no_clean $A52_CFLAGS $A52_LIBS -la52 && $TMPO$HOSTEXEEXT && _a52=yes
		cc_check_clean
	fi
fi
if test "$_a52" = yes ; then
	INCLUDES="$INCLUDES $A52_FLAGS"
	LIBS="$LIBS $A52_LIBS -la52"
fi
define_in_config_if_yes "$_a52" 'USE_A52'
echo "$_a52"

#
# Check for Sparkle if updates support is enabled
#
case $_host_os in
	darwin*)
		echocheck "Sparkle"
		if test "$_updates" = no; then
			_sparkle=no
		else
			if test -z $_sparklepath; then
				_sparklepath=/Library/Frameworks
			fi
			SPARKLE_CFLAGS="-F$_sparklepath"
			SPARKLE_LIBS="-F$_sparklepath"
			if test "$_sparkle" = auto ; then
				_sparkle=no
				cat > $TMPC << EOF
#include <Cocoa/Cocoa.h>
#include <Sparkle/Sparkle.h>
int main(void) { SUUpdater *updater = [SUUpdater sharedUpdater]; return 0; }
EOF
				cc_check $SPARKLE_CFLAGS $SPARKLE_LIBS -framework Sparkle -ObjC++ -lobjc && _sparkle=yes
			fi
			if test "$_sparkle" = yes ; then
				append_var LIBS "$SPARKLE_LIBS -framework Sparkle"
				append_var INCLUDES "$SPARKLE_CFLAGS"
			fi
			define_in_config_if_yes "$_sparkle" 'USE_SPARKLE'
		fi
		echo "$_sparkle"
	;;
	mingw*)
		echocheck "Sparkle"
		if test "$_updates" = no; then
			_sparkle=no
		else
			if test ! -z $_sparklepath ; then
				SPARKLE_CFLAGS="-I$_sparklepath/include"
				SPARKLE_LIBS="-L$_sparklepath/Release -L$_sparklepath/x64/Release"
			fi
			if test "$_sparkle" = auto ; then
				_sparkle=no
				cat > $TMPC << EOF
#include <winsparkle.h>
int main(void) { win_sparkle_get_update_check_interval(); return 0; }
EOF
				cc_check $SPARKLE_CFLAGS $SPARKLE_LIBS -lWinSparkle && _sparkle=yes
			fi
			if test "$_sparkle" = yes ; then
				append_var LIBS "$SPARKLE_LIBS -lWinSparkle"
				append_var INCLUDES "$SPARKLE_CFLAGS"
			fi
			define_in_config_if_yes "$_sparkle" 'USE_SPARKLE'
		fi
		echo "$_sparkle"
	;;
	*)
		_sparkle=no
	;;
esac

#
# Check for libcurl to be present
#
if test "$_libcurl" != "no"; then

	# Look for the curl-config script
	find_libcurlconfig

	if test -z "$_libcurlconfig"; then
		_libcurl=no
	else
		if test -n "$_staticlibpath"; then
			LIBCURL_LIBS=`$_libcurlconfig --static-libs`
		else
			LIBCURL_LIBS=`$_libcurlconfig --libs`
		fi
		LIBCURL_CFLAGS=`$_libcurlconfig --cflags`

		case $_host_os in
			amigaos*)
				append_var LIBCURL_LIBS "-lpthread"
			;;
			# macOS does not allow static libs, overriding
			darwin*)
				LIBCURL_LIBS=`$_libcurlconfig --libs`
			;;
			psp2*)
				append_var LIBCURL_LIBS "-lssl -lcrypto"
			;;
		esac

		if test "$_libcurl" = "auto"; then
			_libcurl=no

			cat > $TMPC << EOF
			#include <curl/curl.h>
			int main(int argc, char *argv[]) {
				int x;
				curl_easy_setopt(NULL,CURLOPT_URL,NULL);
				x=CURL_ERROR_SIZE;
				x=CURLOPT_WRITEFUNCTION;
				x=CURLOPT_WRITEDATA;
				x=CURLOPT_ERRORBUFFER;
				x=CURLOPT_STDERR;
				x=CURLOPT_VERBOSE;

				curl_version_info_data *data = curl_version_info(CURLVERSION_NOW);
				if (data->features & CURL_VERSION_SSL)
					return 0;
				return 1;
			}
EOF

			cc_check_no_clean $LIBCURL_CFLAGS $LIBCURL_LIBS
			if test "$?" -eq 0; then
				if test -n "$_host"; then
					# In cross-compiling mode, we cannot run the result, assume SSL is available
					_libcurl=yes
				else
					$TMPO$HOSTEXEEXT
					if test "$?" -eq 0; then
						_libcurl=yes
					else
						_libcurl="no SSL support"
					fi
				fi
			fi
			cc_check_clean
		fi

		if test "$_libcurl" = "yes"; then
			append_var LIBS "$LIBCURL_LIBS"
			append_var INCLUDES "$LIBCURL_CFLAGS"
		fi
	fi

fi

echocheck "libcurl"
echo "$_libcurl"

define_in_config_if_yes "$_libcurl" "USE_LIBCURL"

#
# Check whether to build cloud integration support
#
echo_n "Cloud integration... "
if test "$_cloud" = "no"; then
	echo "no"
else
	_cloud=no
	if test "$_sdlnet" = "yes"; then
		_cloud=yes
		echo_n "local"
	fi
	if test "$_libcurl" = "yes"; then
		if test "$_cloud" = "yes"; then echo_n ", "; fi
		_cloud=yes
		echo_n "servers"
	fi
	if test "$_cloud" = "no"; then
		echo_n "no"
	fi
	echo  # newline
fi
define_in_config_if_yes $_cloud 'USE_CLOUD'

#
# Check is NSDockTilePlugIn protocol is supported
#
case $_host_os in
	darwin*)
		# NSDockTilePlugIn was added in OS X 10.6, so will not be available when compiling on older OS X versions.
		echocheck "DockTilePlugin"
		if test "$_osxdockplugin" = auto ; then
			_osxdockplugin=no
			cat > $TMPC << EOF
#include <Cocoa/Cocoa.h>
@interface ScummVMDockTilePlugIn : NSObject <NSDockTilePlugIn> {
}
@end
EOF
			cc_check -c -ObjC++ && _osxdockplugin=yes
		fi
		define_in_config_if_yes "$_osxdockplugin" 'USE_DOCKTILEPLUGIN'
		echo "$_osxdockplugin"
	;;
	*)
		_osxdockplugin=no
	;;
esac

#
# Check for FluidSynth
#
echocheck "FluidSynth"

append_var FLUIDSYNTH_LIBS "-lfluidsynth"
case $_host_os in
	mingw*)
		FLUIDSYNTH_STATIC_LIBS="$FLUIDSYNTH_LIBS -lglib-2.0 -lintl -liconv -lws2_32 -lole32 -lshlwapi -lpcre -ldsound -lwinmm"
	;;

	darwin*)
		FLUIDSYNTH_STATIC_LIBS="$FLUIDSYNTH_LIBS -framework Foundation -framework CoreMIDI -framework CoreAudio -lglib-2.0 -lintl -liconv -lreadline"
	;;

	iphone)
		FLUIDSYNTH_STATIC_LIBS="$FLUIDSYNTH_LIBS -framework Foundation -framework CoreMIDI -lglib-2.0 -lintl -liconv"
	;;

	switch)
		FLUIDSYNTH_STATIC_LIBS="$FLUIDSYNTH_LIBS -lnx"
	;;

	*)
		FLUIDSYNTH_STATIC_LIBS="$FLUIDSYNTH_LIBS -lglib-2.0 -lintl -liconv"
	;;
esac

if test "$_fluidsynth" = auto; then
	_fluidsynth=no
	cat > $TMPC << EOF
#include <fluidsynth.h>
int main(void) { delete_fluid_settings(new_fluid_settings()); return 0; }
EOF
	cc_check_no_clean $FLUIDSYNTH_CFLAGS $FLUIDSYNTH_LIBS && _fluidsynth=yes
	if test "$_fluidsynth" != yes; then
		FLUIDSYNTH_LIBS="$FLUIDSYNTH_STATIC_LIBS"
		cc_check_no_clean $FLUIDSYNTH_CFLAGS $FLUIDSYNTH_LIBS && _fluidsynth=yes
	fi
	cc_check_clean
fi
if test "$_fluidsynth" = yes; then
	append_var LIBS "$FLUIDSYNTH_LIBS"
	append_var INCLUDES "$FLUIDSYNTH_CFLAGS"
fi
define_in_config_if_yes "$_fluidsynth" 'USE_FLUIDSYNTH'
echo "$_fluidsynth"

#
# Check for readline if text_console is enabled
#
echocheck "readline"
if test "$_text_console" = yes ; then
	_READLINE_LIBS="-lreadline"
	if test "$_readline" = auto ; then
		_readline=no
		cat > $TMPC << EOF
#include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>

int main(void) {
	char *x = readline("");
}
EOF
		cc_check_no_clean $READLINE_CFLAGS $READLINE_LIBS $_READLINE_LIBS && _readline=yes
		if test "$_readline" = no ; then
			_READLINE_LIBS="-lreadline -ltermcap"
			cc_check_no_clean $READLINE_CFLAGS $READLINE_LIBS $_READLINE_LIBS && _readline=yes
		fi
	fi
	cc_check_clean
	echo "$_readline"
else
	_readline=no
	echo "skipping (text console disabled)"
fi

if test "$_readline" = yes ; then
	append_var LIBS "$READLINE_LIBS $_READLINE_LIBS"
	append_var INCLUDES "$READLINE_CFLAGS"

	#
	# Check the type of rl_completion_entry_function.
	# It can be int(*)(const char *, int) or char *(*)(const char *, int).
	#
	cat > $TMPC << EOF
#include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>

int readline_completionFunction(const char *, int);

int main(void) {
	char *x = readline("");
	rl_completion_entry_function = &readline_completionFunction;
}
EOF
	cc_check -c && add_line_to_config_h '#define USE_READLINE_INT_COMPLETION'

fi
define_in_config_h_if_yes "$_readline" 'USE_READLINE'

define_in_config_h_if_yes "$_text_console" 'USE_TEXT_CONSOLE_FOR_DEBUGGER'

#
# Check for Unity if taskbar integration is enabled
#
echocheck "libunity"
if test "$_unix" = no || test "$_taskbar" = no || test "$_pkg_config" = no; then
	_libunity=no
else
if test "$_libunity" = auto ; then
	case $_host_os in
		mingw*)
			# pkgconfig and unity are not supported on mingw
			_libunity=no
			;;
		*)
			# Unity has a lots of dependencies, update the libs and cflags var with them
			LIBUNITY_LIBS="$LIBUNITY_LIBS `$_pkgconfig --libs 'unity > 3.8.1' 2>> "$TMPLOG"`"
			LIBUNITY_CFLAGS="$LIBUNITY_CFLAGS `$_pkgconfig --cflags 'unity > 3.8.1' 2>> "$TMPLOG"`"
			_libunity=no
			cat > $TMPC << EOF
#include <unity.h>
int main(void) {
	unity_launcher_entry_get_for_desktop_id("residualvm.desktop");
	return 0;
}
EOF
			cc_check $LIBUNITY_CFLAGS $LIBUNITY_LIBS && _libunity=yes
			;;
	esac
fi
if test "$_libunity" = yes ; then
	if test "$LIBUNITY_CFLAGS" = "" || test "$LIBUNITY_LIBS" = ""; then
		LIBUNITY_LIBS="$LIBUNITY_LIBS `$_pkgconfig --libs 'unity > 3.8.1' 2>> "$TMPLOG"`"
		LIBUNITY_CFLAGS="$LIBUNITY_CFLAGS `$_pkgconfig --cflags 'unity > 3.8.1' 2>> "$TMPLOG"`"
	fi
	append_var LIBS "$LIBUNITY_LIBS"
	append_var CXXFLAGS "$LIBUNITY_CFLAGS"
fi
define_in_config_h_if_yes "$_libunity" 'USE_UNITY'
fi
echo "$_libunity"

#
# Check for GTK if system dialogs are enabled
#
echocheck "gtk"
if test "$_unix" = no || test "$_dialogs" = no || test "$_pkg_config" = no; then
	_gtk=no
else
if test "$_gtk" = auto ; then
	case $_host_os in
		mingw*)
			# pkgconfig and gtk are not supported on mingw
			_gtk=no
			;;
		*)
			# GTK has a lots of dependencies, update the libs and cflags var with them
			GTK_LIBS="$GTK_LIBS `$_pkgconfig --libs gtk+-3.0 2>> "$TMPLOG"`"
			GTK_CFLAGS="$GTK_CFLAGS `$_pkgconfig --cflags gtk+-3.0 2>> "$TMPLOG"`"
			_gtk=no
			cat > $TMPC << EOF
#include <gtk/gtk.h>
int main(void) {
	gtk_init_check(NULL, NULL);
	return 0;
}
EOF
			cc_check $GTK_CFLAGS $GTK_LIBS && _gtk=yes
			;;
	esac
fi
if test "$_gtk" = yes ; then
	if test "$GTK_CFLAGS" = "" || test "$GTK_LIBS" = ""; then
		GTK_LIBS="$GTK_LIBS `$_pkgconfig --libs gtk+-3.0 2>> "$TMPLOG"`"
		GTK_CFLAGS="$GTK_CFLAGS `$_pkgconfig --cflags gtk+-3.0 2>> "$TMPLOG"`"
	fi
	append_var LIBS "$GTK_LIBS"
	append_var CXXFLAGS "$GTK_CFLAGS"
fi
define_in_config_h_if_yes "$_gtk" 'USE_GTK'
fi
echo "$_gtk"

#
# Check for FreeType2 to be present
#
find_freetype() {
        # Wrapper function which tries to find freetype
        # either by calling freetype-config or by using
        # pkg-config.
        # As of freetype-2.9.1 the freetype-config file
        # no longer gets installed by default.
	if test "$_pkg_config" = "yes" && $_pkgconfig --exists freetype2; then
		FREETYPE2_LIBS=`$_pkgconfig --libs freetype2`
		FREETYPE2_CFLAGS=`$_pkgconfig --cflags freetype2`
		FREETYPE2_STATIC_LIBS=`$_pkgconfig --static --libs freetype2`
		_freetype_found="true"
	else
		# Look for the freetype-config script
		find_freetypeconfig
		if test -n "$_freetypeconfig"; then
			# Since 2.3.12, freetype-config prepends $SYSROOT to everything.
			# This means we can't pass it a --prefix that includes $SYSROOT.
			freetypeprefix="$_freetypepath"
			if test -n "$SYSROOT" -a "$SYSROOT" != "/"; then
				teststring=VeryImplausibleSysrootX1Y2Z3
				if ( env SYSROOT=/$teststring "$_freetypeconfig" --cflags | grep $teststring 2> /dev/null > /dev/null ); then
					echo "Adapting FreeType prefix to SYSROOT" >> "$TMPLOG"
					freetypeprefix="${freetypeprefix##$SYSROOT}"
				fi
			fi
			FREETYPE2_LIBS=`$_freetypeconfig --prefix="$freetypeprefix" --libs`
			FREETYPE2_CFLAGS=`$_freetypeconfig --prefix="$freetypeprefix" --cflags`
			FREETYPE2_STATIC_LIBS=`$_freetypeconfig --prefix="$freetypeprefix" --static --libs 2>/dev/null`
			_freetype_found="true"
		fi
	fi
}

if test "$_freetype2" != "no"; then
	find_freetype
	if test $_freetype_found != true; then
		_freetype2=no
	else
		if test "$_freetype2" = "auto"; then
			_freetype2=no

			cat > $TMPC << EOF
#include <ft2build.h>
#include FT_FREETYPE_H

int main(int argc, char *argv[]) {
	FT_Library library;
	FT_Error error = FT_Init_FreeType(&library);
	FT_Done_FreeType(library);
}
EOF

			cc_check_no_clean $FREETYPE2_CFLAGS $FREETYPE2_LIBS && _freetype2=yes
			# Modern freetype-config scripts accept --static to get all
			# required flags for static linking. We abuse this to detect
			# FreeType2 builds which are static themselves.
			if test "$_freetype2" != "yes"; then
				FREETYPE2_LIBS="$FREETYPE2_STATIC_LIBS"
				cc_check_no_clean $FREETYPE2_CFLAGS $FREETYPE2_LIBS && _freetype2=yes
			fi
			cc_check_clean
		fi

		if test "$_freetype2" = "yes"; then
			append_var LIBS "$FREETYPE2_LIBS"
			append_var CXXFLAGS "$FREETYPE2_CFLAGS"
		fi
	fi

fi

echocheck "FreeType2"
echo "$_freetype2"

define_in_config_if_yes "$_freetype2" "USE_FREETYPE2"


# ResidualVM specific start ->
#
# Check for GLEW
#
echocheck "GL Extension Wrangler (GLEW)"
if test "$_glew" != "no" && test "$_opengl" = "no"; then
	_glew=no
	echo "cannot use GLEW without OpenGL"
elif test "$_glew" != "no" && test "$_opengles2" = "yes"; then
	_glew=no
	echo "not needed with OpenGL ES v2"
else

	case $_host_os in
	darwin*)
		_GLEW_LIBS="-lGLEW"
		;;
	mingw*)
		_GLEW_CFLAGS="-DGLEW_STATIC"
		_GLEW_LIBS="-lglu32 -lglew32 -lopengl32"
		;;
	*)
		_GLEW_LIBS="-lGLU -lGLEW"
		;;
	esac

	if test "$_glew" = auto; then
		_glew=no
		cat > $TMPC << EOF
#include <GL/glew.h>
int main(void) {
	glewInit();
	return 0;
}
EOF
		cc_check $DEFINES $GLEW_CFLAGS $_GLEW_CFLAGS $GLEW_LIBS $_GLEW_LIBS && _glew=yes
	fi

	if test "$_glew" = yes ; then
		append_var LIBS "$GLEW_LIBS $_GLEW_LIBS"
		append_var INCLUDES "$GLEW_CFLAGS $_GLEW_CFLAGS"
	fi

	echo "$_glew"
fi

define_in_config_if_yes "$_glew" "USE_GLEW"


#
# Check for OpenGL (ES)
#
echocheck "OpenGL"

case $_backend in
	openpandora)
		# Only enable OpenGL ES on the OpanPandora if --enable-opengl is passed in explicitly.
		if test "$_opengl" = yes ; then
			_opengl=yes
			_opengles=yes
			OPENGL_LIBS="-lGLES_CM -lEGL -lX11"
			OPENGL_CFLAGS="$OPENGL_LIBS"
			append_var LIBS "$OPENGL_LIBS"
			append_var INCLUDES "$OPENGL_CFLAGS"
		fi
		;;
esac

if test "$_opengl" = auto ; then
	_opengl=no
	if test "$_backend" = "sdl" || test "$_backend" = "android"; then
		# Try different header filenames
		# 1) GL/gl.h         This is usually used on POSIX and Windows systems
		# 2) OpenGL/gl.h     This is used on Mac OS X
		# 3) GLES2/gl2.h     This is used for OpenGL ES 2.x
		# 4) GLES/gl.h       This is used for OpenGL ES 1.x
		for i in "GL/gl.h" "OpenGL/gl.h" "GLES2/gl2.h" "GLES/gl.h"; do
			# Test the current header for OpenGL
			if test "$_opengles2" = no ; then
				cat > $TMPC << EOF
#include <$i>
#include <stdio.h>
int main(void) { printf("ANTIVIRUS FALSE POSITIVE WORKAROUND"); return GL_VERSION_1_1; }
EOF
				cc_check $DEFINES $OPENGL_CFLAGS $OPENGL_LIBS && _opengl=yes && break
			fi

			# Test the current header for OpenGL ES2
			cat > $TMPC << EOF
#include <$i>
int main(void) { return GL_ES_VERSION_2_0; }
EOF
			cc_check $DEFINES $OPENGL_CFLAGS $OPENGL_LIBS && _opengl=yes && _opengles2=yes && break

			# Test the current header for OpenGL ES
			if test "$_opengles2" = no ; then
				cat > $TMPC << EOF
#include <$i>
int main(void) { return GL_OES_VERSION_1_1; }
EOF
				cc_check $DEFINES $OPENGL_CFLAGS $OPENGL_LIBS && _opengl=yes && _opengles=yes && break
			fi
		done
	fi
fi
if test "$_opengl" = yes ; then
	# Our simple test case
	cat > $TMPC << EOF
int main(void) { return 0; }
EOF

	_opengl=no
	# Try different library names
	if test "$_opengles" = "yes" ; then
		# 1) GLES_CM    This is usually used for OpenGL ES 1.1 (Common profile)
		# 2) GLESv1_CM  This is used by the Windows Mali OpenGL ES 1.1 Emulator
		# 3) glesv1     This is used by the Linux Mali OpenGL ES 1.1 Emulator
		_opengles=no
		for lib in "-lGLES_CM" "-lGLESv1_CM" "-lglesv1"; do
			if cc_check_no_clean $DEFINES $OPENGL_CFLAGS $OPENGL_LIBS $lib
				then
				_opengl=yes
				_opengles=yes
				append_var OPENGL_LIBS "$lib"
				break
			fi
		done
	elif test "$_opengles2" = yes ; then
		# 1) GLESv2    This is generally used by nearly all platforms for OpenGL ES 2
		# 2) ogles2    This is used by AmigaOS4 (and probably others)
		_opengles2=no
		for lib in "-lGLESv2" "-logles2"; do
			if cc_check_no_clean $DEFINES $OPENGL_CFLAGS $OPENGL_LIBS $lib
				then
				_opengl=yes
				_opengles2=yes
				_opengl_shaders=yes
				append_var OPENGL_LIBS "$lib"
				break
			fi
		done
	else
		case $_host_os in
		darwin*)
			OPENGL_LIBS="-framework OpenGL"
			;;
		mingw*)
			OPENGL_LIBS="-lopengl32"
			;;
		*)
			OPENGL_LIBS="-lGL"
			;;
		esac
		if cc_check_no_clean $DEFINES $OPENGL_CFLAGS $OPENGL_LIBS
			then
			_opengl=yes
		fi
	fi

	if test "$_opengl" = yes ; then
		append_var LIBS "$OPENGL_LIBS"
		append_var INCLUDES "$OPENGL_CFLAGS"
		if test "$_opengl_shaders" = auto; then
			_opengl_shaders=$_glew
		fi
		if test "$_opengl_shaders" = yes && test "$_opengles2" = no && test "$_glew" = no; then
			echo "WARNING: OpenGL Shader support requires GLEW!"
			_opengl_shaders=no
		fi
	else
		_opengl_shaders=no
	fi
	cc_check_clean
fi


if test "$_opengles" = "yes" ; then
	echo "yes (OpenGL ES)"
elif test "$_opengles2" = "yes" ; then
	echo "yes (OpenGL ES2)"
else
	if test "$_opengl_shaders" = "yes" ; then
		echo "$_opengl (shaders enabled)"
	elif test "$_opengl" = "yes" ; then
		echo "$_opengl (shaders disabled)"
	else
		echo "no"
	fi
fi

define_in_config_if_yes "$_opengl" "USE_OPENGL"
define_in_config_if_yes "$_opengles" "USE_GLES"
define_in_config_if_yes "$_opengles2" "USE_GLES2"
define_in_config_if_yes "$_opengl_shaders" "USE_OPENGL_SHADERS"

#
# Check for iconv
#
echo_n "Checking whether iconv.h is present... "
if test "$_iconv" = auto ; then
	_iconv=no
	cat > $TMPC << EOF
#include <iconv.h>
int main(int, char **) {
	return 0;
}
EOF
	cc_check $ICONV_CFLAGS $ICONV_LIBS && _iconv=yes
fi

create_iconv_test() {
	cat > $TMPC << EOF
#include <iconv.h>
int main(int, char **) {
	iconv_t iconv = iconv_open("UTF-32", "SJIS");
	iconv_close(iconv);
	return 0;
}
EOF
}
echo "$_iconv"

if test "$_iconv" = yes ; then
	echo_n "Checking whether iconv needs linking against libiconv... "

	needs_iconvlib='auto'
	create_iconv_test
	cc_check $ICONV_CFLAGS $ICONV_LIBS -liconv && needs_iconvlib='yes'
	# We do check linking without -liconv here too, just in case
	# it would fail otherwise too
	create_iconv_test
	cc_check $ICONV_CFLAGS $ICONV_LIBS && needs_iconvlib='no'

	if test "$needs_iconvlib" = auto ; then
		_iconv=no
		echo "does not link at all"
	else
		if test "$needs_iconvlib" = yes ; then
			append_var ICONV_LIBS "-liconv"
		fi
		echo "$needs_iconvlib"

		echo_n "Checking signature of iconv... "
		uses_const=no

		cat > $TMPC << EOF
#include <iconv.h>
int main(int argc, char **argv) {
	iconv_t iconvP;
	const char **inbuf = 0;
	iconv(iconvP, inbuf, 0, 0, 0);
	return 0;
}
EOF
		cc_check $ICONV_CFLAGS $ICONV_LIBS && uses_const=yes

		if test "$uses_const" = yes ; then
			echo "iconv_t, const char **, size_t *, char **, size_t *"
		else
			echo "iconv_t, char **, size_t *, char **, size_t *"
		fi

		define_in_config_if_yes "$uses_const" 'ICONV_USES_CONST'
	fi
fi

if test "$_iconv" = yes ; then
	append_var LIBS "$ICONV_LIBS"
	append_var INCLUDES "$ICONV_CFLAGS"
fi

echocheck "iconv"
define_in_config_if_yes "$_iconv" 'USE_ICONV'
echo "$_iconv"
# ResidualVM specific ends here <-


#
# Check for Linux CD-ROM support
#
case $_host_os in
	*linux*)
		echocheck "Linux CD-ROM"
		linuxcd=no
		cat > $TMPC << EOF
#include <linux/cdrom.h>
#include <sys/types.h>
int main(void) {
	int x = CDROMREADAUDIO;
	dev_t dev;
	return major(dev) + x;
}
EOF
		cc_check && linuxcd=yes
		define_in_config_if_yes "$linuxcd" 'USE_LINUXCD'
		echo "$linuxcd"
		;;
esac


#
# Check for nasm
#
if test "$_have_x86" = yes ; then
	echocheck "nasm"
	if test "$_nasm" = no ; then
		echo "disabled"
	else
		IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS=$SEPARATOR

		for path_dir in $_nasmpath; do
			if test -x "$path_dir/nasm$NATIVEEXEEXT" ; then
				NASM="$path_dir/nasm$NATIVEEXEEXT"
				NASMFLAGS="-O1 -g"
				echo $NASM
				break
			fi
		done

		# fallback to the nasm compatible yasm
		if test x$NASM = x -o x$NASM = x'"$NASM"'; then
			for path_dir in $_nasmpath; do
				if test -x "$path_dir/yasm$NATIVEEXEEXT" ; then
					NASM="$path_dir/yasm$NATIVEEXEEXT"
					NASMFLAGS="-a x86 -m x86"
					echo $NASM
					break
				fi
			done
		fi

		IFS="$ac_save_ifs"

		if test x$NASM = x -o x$NASM = x'"$NASM"'; then
			echo "not found"
			_nasm=no
		else
			case $_host_os in
				darwin*)
					append_var NASMFLAGS "-f macho"
				;;
				mingw*)
					append_var NASMFLAGS "-f win32"
				;;
				os2-emx*)
					append_var NASMFLAGS "-f aout"
				;;
				*)
					append_var NASMFLAGS "-f elf"
				;;
			esac
			_nasm=yes
		fi
	fi
fi

define_in_config_if_yes $_nasm 'USE_NASM'

#
# Check for pandoc
#
if test "$_pandoc" = yes ; then
	echocheck "pandoc"

	IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS=$SEPARATOR

	for path_dir in $_pandocpath; do
		if test -x "$path_dir/pandoc$NATIVEEXEEXT" ; then
			PANDOC="$path_dir/pandoc$NATIVEEXEEXT"
			break
		fi
	done

	IFS="$ac_save_ifs"

	if ! test "$PANDOC" ; then
		_pandoc=no
	fi

	echo $_pandoc
fi

define_in_config_if_yes $_pandoc 'USE_PANDOC'

#
# Check for FriBidi
#
echocheck "FriBidi"
if test "$_fribidi" = auto ; then
	_fribidi=no
	cat > $TMPC << EOF
#include <fribidi/fribidi.h>
int main(void) { return 0; }
EOF
	cc_check $FRIBIDI_CFLAGS $FRIBIDI_LIBS -lfribidi && _fribidi=yes
fi
if test "$_fribidi" = yes ; then
	append_var LIBS "$FRIBIDI_LIBS -lfribidi"
	append_var INCLUDES "$FRIBIDI_CFLAGS"
fi
define_in_config_if_yes "$_fribidi" 'USE_FRIBIDI'
echo "$_fribidi"


# Default to plain text output for pandoc
if test -z "$_pandocformat" -o "$_pandocformat" = "default"; then
	_pandocformat="plain"
fi

if test "$_pandocext" = "default"; then
	if test "$_pandocformat" = plain; then
		_pandocext=""
	else
		_pandocext=".$_pandocformat"
	fi
fi

#
# Enable vkeybd / event recorder
#
define_in_config_if_yes $_vkeybd 'ENABLE_VKEYBD'
define_in_config_if_yes $_eventrec 'ENABLE_EVENTRECORDER'

# Check whether to build translation support
#
echo_n "Building translation support... "
define_in_config_if_yes $_translation 'USE_TRANSLATION'
if test "$_translation" = no ; then
	echo "no"
else
	echo_n "yes ("

	if test "$_detectlang" != yes ; then
		cat > $TMPC << EOF
#include <locale.h>
int main(void) { setlocale(LC_ALL, ""); return 0; }
EOF
		_detectlang=no
		cc_check && _detectlang=yes
	fi

	define_in_config_h_if_yes $_detectlang 'USE_DETECTLANG'
	if test "$_detectlang" = yes ; then
		echo "with runtime language detection)"
	else
		echo "without runtime language detection)"
	fi
fi

#
# Check whether to build taskbar integration support
#
echo_n "Building taskbar integration support... "
if test "$_taskbar" = "no"; then
	echo "no"
else
	case $_host_os in
	mingw*)
		append_var LIBS "-lole32 -luuid"
		echo "win32"
		_taskbar=yes
		;;
	darwin*)
		echo "osx"
		_taskbar=yes
		;;
	*)
		if test "$_libunity" = yes; then
			echo "unity"
			_taskbar=yes
		else
			echo "no"
			_taskbar=no
		fi
		;;
	esac
fi
define_in_config_if_yes $_taskbar 'USE_TASKBAR'

#
# Check whether to build system dialogs support
#
echo_n "Building system dialogs support... "
if test "$_dialogs" = "no"; then
	echo "no"
else
	case $_host_os in
	mingw*)
		append_var LIBS "-lole32 -luuid"
		echo "win32"
		_dialogs=yes
		;;
	darwin*)
		echo "osx"
		_dialogs=yes
		;;
	*)
		if test "$_gtk" = yes; then
			echo "gtk"
			_dialogs=yes
		else
			echo "no"
			_dialogs=no
		fi
		;;
	esac
fi
define_in_config_if_yes $_dialogs 'USE_SYSDIALOGS'

#
# Check whether to build TTS integration support
#
echo_n "Building text-to-speech support... "
if test "$_tts" = "no"; then
	echo "no"
else
	case $_host_os in
	linux*)
		echo "linux"
		_tts=yes
		define_in_config_if_yes $_tts 'USE_SPEECH_DISPATCHER'
		append_var LIBS '-lspeechd -lpthread'
		;;
	mingw*)
		echo "win32"
		_tts=yes
		append_var LIBS '-lsapi -lole32'
		;;
	darwin*)
		echo "osx"
		_tts=yes
		;;
	*)
		echo "no"
		_tts=no
		;;
	esac
fi
define_in_config_if_yes $_tts 'USE_TTS'

#
# Check whether to build Bink video support
#
echo_n "Building Bink video support... "
define_in_config_if_yes $_bink 'USE_BINK'
echo "$_bink"

#
# Check whether to build updates support
#
echo_n "Building updates support... "
if test "$_updates" = yes; then
	if test "$_sparkle" = yes; then
		echo "Sparkle"
	else
		_updates=no;
		echo "$_updates"
	fi
else
	echo "$_updates"
fi
define_in_config_if_yes $_updates 'USE_UPDATES'

#
# Check whether to activate engines (ResidualVM specific)
#
if test `get_engine_build monkey4` = yes && test ! "$_mpeg2" = yes ; then
	echo "...disabling support for video cutscenes in PS2 version of Escape from Monkey Island. mpeg2dec is required"
fi

#
# Figure out installation directories
#
test "x$prefix" = xNONE && prefix=/usr/local
test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'

case $_host_os in
	mingw*)
		# Windows stores all the external data files in executable file.
		;;
	*)
		append_var DEFINES "-DDATA_PATH=\\\"$datadir\\\""
		;;
esac

case $_backend in
	3ds)
		append_var DEFINES "-DPLUGIN_DIRECTORY=\\\"$datadir/plugins\\\""
		;;
	openpandora)
		# Add ../plugins as a path so plugins can be found when running from a .PND.
		append_var DEFINES "-DPLUGIN_DIRECTORY=\\\"../plugins\\\""
		;;
	maemo | webos)
		# The WebOS and Maemo apps want the plugins in the "lib" directory
		# without a scummvm sub directory.
		append_var DEFINES "-DPLUGIN_DIRECTORY=\\\"$libdir\\\""
		;;
	ps2)
		# PS2 bogus dir: it actually depends on launch medium
		append_var DEFINES "-DPLUGIN_DIRECTORY=\\\"host:plugins\\\""
		;;
	*)
		append_var DEFINES "-DPLUGIN_DIRECTORY=\\\"$libdir/residualvm\\\""
		;;
esac

#
# Set variables for profiling.
# We need to do it here to prevent mess-ups with the tests e.g. on the PSP
#
if test "$_enable_prof" = yes ; then
	append_var CXXFLAGS "-pg"
	append_var LDFLAGS "-pg"
	append_var DEFINES "-DENABLE_PROFILING"
fi

echo_n "Enabling Address Sanitizer... "

if test "$_enable_asan" = yes ; then
	append_var CXXFLAGS "-fsanitize=address -fno-omit-frame-pointer"
	append_var LDFLAGS "-fsanitize=address -fno-omit-frame-pointer"
fi
echo "$_enable_asan"

echo_n "Backend... "
echo_n "$_backend"

if test "$_backend" = "sdl" -a -n "$_sdlversion"; then
	echo_n " ($_sdlversion)"
fi

if test "$_nasm" = yes ; then
	echo_n ", assembly routines"
fi

if test "$_16bit" = yes ; then
	: # residualvm not use it
fi

if test "$_highres" = yes ; then
	: # residualvm not use it
fi

if test "$_savegame_timestamp" = yes ; then
	echo_n ", savegame timestamp"
fi

if test "$_build_scalers" = yes ; then
	if test "$_build_hq_scalers" = yes ; then
		: # residualvm not use it
	else
		: # residualvm not use it
	fi
fi

if test "$_mt32emu" = yes ; then
	echo_n ", MT-32 emulator"
fi

if test "$_lua" = yes ; then
	echo_n ", Lua"
fi

if test "$_nuked_opl" = yes ; then
	echo_n ", Nuked OPL emulator"
fi

if test "$_text_console" = yes ; then
	echo_n ", text console"
fi

if test "$_vkeybd" = yes ; then
	echo_n ", virtual keyboard"
fi

if test "$_eventrec" = yes ; then
	echo_n ", event recorder"
fi

if test "$_cloud" = yes ; then
	echo ", cloud"
else
	echo
fi

#
# Some last-minute backend specific stuff, executed
# after all of CXXFLAGS, LDFLAGS, LIBS etc. have been setup
#
case $_backend in
	3ds)
		if test "$_freetype2" = yes -a "$_png" = yes; then
			append_var LIBS "-lbz2"
			append_var LIBS "-lpng"
		fi
		if test "$_tremor" = yes -o "$_flac" = yes; then
			append_var LIBS "-logg"
		fi

		# Moved -Wl,--gc-sections here to avoid it interfering with the library checks
		if test "$_dynamic_modules" = no ; then
			append_var LDFLAGS "-Wl,--gc-sections"
		else
			append_var LDFLAGS "-Wl,--no-gc-sections"
		fi
		;;
	android)
		# ssp at this point so the cxxtests link
		if test "$_debug_build" = yes; then
			append_var CXXFLAGS "-fstack-protector"
		else
			append_var CXXFLAGS "-fno-stack-protector"
		fi

		static_libs=''
		system_libs=''
		for lib in $LIBS; do
			case $lib in
			-lz|-lm|-ldl|-landroid|-lGLESv1_CM|-lGLESv2) # ResidualVM specific
				system_libs="$system_libs $lib"
				;;
			*)
				static_libs="$static_libs $lib"
				;;
			esac
		done

		# -lgcc is carefully placed here - we want to catch
		# all toolchain symbols in *our* libraries rather
		# than pick up anything unhygenic from the Android libs.
		LIBS="-Wl,-Bstatic $static_libs -Wl,-Bdynamic -lgcc $system_libs -llog -landroid" # ResidualVM removed: -lGLESv1_CM
		;;
	n64)
		# Move some libs down here, otherwise some symbols requires by libvorbis aren't found
		# during linking stage
		append_var LIBS "-lc -lgcc -lnosys"
		;;
esac


#
# Engine selection
#
_engines_built_static=""
_engines_built_dynamic=""
_engines_skipped=""

# Show a message if looping over engines takes longer than 5 secs
sh -c "
	touch config.gnomes
	sleep 5
	if test -f config.gnomes; then
		printf 'Employing little gnomes...'
		rm -f config.gnomes
	fi" 2>/dev/null &

for engine in $_engines; do
	# Check whether all dependencies are available
	check_engine_deps $engine

	if test "`get_engine_sub $engine`" = "no" ; then
		# It's a main engine
		if test `get_engine_build $engine` = no ; then
			isbuilt=no
		else
			# If dynamic plugins aren't supported, mark
			# all the engines as static
			if test $_dynamic_modules = no ; then
				set_var _engine_${engine}_build "static"
			else
				# If it wasn't explicitly marked as static or
				# dynamic, use the configured default
				if test `get_engine_build $engine` = yes ; then
					set_var _engine_${engine}_build "${_plugins_default}"
				fi
			fi

			# Prepare the defines
			if test `get_engine_build $engine` = dynamic ; then
				isbuilt=DYNAMIC_PLUGIN
			else
				set_var _engine_${engine}_build "static"
				isbuilt=STATIC_PLUGIN
			fi
		fi
	else
		# It's a subengine, just say yes or no
		if test "`get_engine_build $engine`" = "no" ; then
			isbuilt=no
		else
			isbuilt=1
		fi
	fi

	# Save the settings
	defname="ENABLE_`echo $engine | tr '[a-z]' '[A-Z]'`"
	if test "$isbuilt" = "no" ; then
		add_line_to_config_mk "# $defname"
	else
		add_line_to_config_mk "$defname = $isbuilt"
	fi
done

# Sort engines to place our headline engine at start...
# No technical reason, just historical convention
headline_engine=grim
_sorted_engines="${headline_engine}"
for engine in $_engines; do
	if test "${engine}" != "${headline_engine}" ; then
		_sorted_engines="${_sorted_engines} ${engine}"
	fi
done

# Prepare the information to be shown
for engine in $_sorted_engines; do
	if test "`get_engine_sub $engine`" = "no" ; then
		# It's a main engine
		prepare_engine_build_strings $engine
	fi
done

#
# Detection of WIP/unstable engines
#
for engine in $_engines; do
	engine_build=`get_engine_build $engine`
	engine_build_default=`get_engine_build_default $engine`
	if test $engine_build != no -a $engine_build_default = no ; then
		set_var _tainted_build "yes"
	fi
done

add_to_config_h_if_yes `get_var _tainted_build` '#define TAINTED_BUILD'

# Complete the message on slow systems
if test -f config.gnomes ; then
	# Kill does not work well here as it produces nasty 'Killed' message
	rm -rf config.gnomes
else
	echo " work is done"
fi

#
# Show which engines ("frontends") are to be built
#
echo
if test -n "$_engines_built_static" ; then
	echo "Engines (builtin):"
	echo "$_engines_built_static" | sed 's/@/\
/g
s/#/    /g'
fi

if test -n "$_engines_built_dynamic" ; then
	echo "Engines (plugins):"
	echo "$_engines_built_dynamic" | sed 's/@/\
/g
s/#/    /g'
fi

if test -n "$_engines_skipped" ; then
	echo "Engines Skipped:"
	echo "$_engines_skipped" | sed 's/@/\
/g
s/#/    /g'
fi

if test -n "$_engines_built_wip" ; then
	echo "WARNING: This ResidualVM build contains the following UNSTABLE engines:"
	echo "$_engines_built_wip" | sed 's/@/\
/g
s/#/    /g'
fi

echo
echo "Creating config.h"
cat > config.h << EOF
/* This file is automatically generated by configure */
/* DO NOT EDIT MANUALLY */

#ifndef CONFIG_H
#define CONFIG_H

$_config_h_data

/* Data types */
#ifndef SCUMMVM_DONT_DEFINE_TYPES
typedef unsigned $type_1_byte byte;
typedef unsigned int uint;
typedef unsigned $type_1_byte uint8;
typedef unsigned $type_2_byte uint16;
typedef unsigned $type_4_byte uint32;
typedef unsigned $type_8_byte uint64;
typedef signed $type_1_byte int8;
typedef signed $type_2_byte int16;
typedef signed $type_4_byte int32;
typedef signed $type_8_byte int64;
#endif

typedef $type_ptr  uintptr;

#if defined(__APPLE__) && !defined(__ppc__)
#ifndef _UINT64
#define _UINT64
#endif
#endif

#endif /* CONFIG_H */
EOF

echo "Creating config.mk"
cat > config.mk << EOF
# -------- Generated by configure -----------

SAVED_CONFIGFLAGS       := $SAVED_CONFIGFLAGS
SAVED_AR                := $SAVED_AR
SAVED_AS                := $SAVED_AS
SAVED_ASFLAGS           := $SAVED_ASFLAGS
SAVED_CPPFLAGS          := $SAVED_CPPFLAGS
SAVED_CXX               := $SAVED_CXX
SAVED_CXXFLAGS          := $SAVED_CXXFLAGS
SAVED_DWP               := $SAVED_DWP
SAVED_LD                := $SAVED_LD
SAVED_LDFLAGS           := $SAVED_LDFLAGS
SAVED_PKG_CONFIG_LIBDIR := $SAVED_PKG_CONFIG_LIBDIR
SAVED_RANLIB            := $SAVED_RANLIB
SAVED_SDL_CONFIG        := $SAVED_SDL_CONFIG
SAVED_STRIP             := $SAVED_STRIP
SAVED_WINDRES           := $SAVED_WINDRES
SAVED_WINDRESFLAGS      := $SAVED_WINDRESFLAGS

CXX := $CXX
CXXFLAGS := $CXXFLAGS
LD := $LD
LIBS += $LIBS
RANLIB := $_ranlib
STRIP := $_strip
AR := $_ar
AS := $_as
ASFLAGS := $ASFLAGS
DWP := $_dwp
WINDRES := $_windres
WINDRESFLAGS := $WINDRESFLAGS
STAGINGPATH=$_stagingpath
WIN32PATH=$_win32path
AMIGAOSPATH=$_amigaospath
STATICLIBPATH=$_staticlibpath
XCODETOOLSPATH=$_xcodetoolspath
SPARKLEPATH=$_sparklepath
SDLCONFIG=$_sdlconfig

ABI := $ABI

BACKEND := $_backend
MODULES += $MODULES
MODULE_DIRS += $MODULE_DIRS
EXEPRE := $HOSTEXEPRE
EXEEXT := $HOSTEXEEXT
NASM := $NASM
NASMFLAGS := $NASMFLAGS
PANDOC := $PANDOC
PANDOCFORMAT := $_pandocformat
PANDOCEXT := $_pandocext
ZLIB_LIBS := $ZLIB_LIBS
ZLIB_CFLAGS := $ZLIB_CFLAGS

prefix = $prefix
exec_prefix = $exec_prefix
bindir = $bindir
libdir = $libdir
datarootdir = $datarootdir
datadir = $datadir
mandir = $mandir
docdir = $docdir

$_config_mk_data

INCLUDES += $INCLUDES
OBJS += $OBJS
DEFINES += $DEFINES
LDFLAGS += $LDFLAGS

$_mak_plugins

port_mk = $_port_mk
EOF

#
# Create a custom Makefile when building outside the source tree
# TODO: Add a better check than just looking for 'Makefile'
#
if test ! -f Makefile.common ; then
echo "Creating Makefile"

cat > Makefile << EOF
# -------- Generated by configure -----------
srcdir = $_srcdir
vpath %.h \$(srcdir)
vpath %.cpp \$(srcdir)
vpath %.c \$(srcdir)
vpath %.m \$(srcdir)
vpath %.mm \$(srcdir)
vpath %.asm \$(srcdir)
vpath %.s \$(srcdir)
vpath %.S \$(srcdir)
vpath %.rc \$(srcdir)
vpath %.md \$(srcdir)
include \$(srcdir)/Makefile
EOF

fi

# Ensure engines folder exists prior to trying to generate
# files into it (used for out-of-tree-builds)
mkdir -p engines

echo "Creating engines/engines.mk"
cat > engines/engines.mk << EOF
# This file is automatically generated by configure
# DO NOT EDIT MANUALLY
# This file is being included by "Makefile.common"
EOF

for engine in $_sorted_engines; do
	j=`echo $engine | tr '[:lower:]' '[:upper:]'`
	if test "`get_engine_sub $engine`" = "no" ; then
		# main engine
		cat >> engines/engines.mk << EOF

ifdef ENABLE_$j
DEFINES += -DENABLE_$j=\$(ENABLE_$j)
MODULES += engines/$engine
EOF

	for subeng in `get_engine_subengines $engine` ; do
		k=`echo $subeng | tr '[:lower:]' '[:upper:]'`
		cat >> engines/engines.mk << EOF

ifdef ENABLE_$k
DEFINES += -DENABLE_$k
endif
EOF
	done

	cat >> engines/engines.mk << EOF
endif
EOF
	fi
done

echo "Creating engines/plugins_table.h"
cat > engines/plugins_table.h << EOF
/* This file is automatically generated by configure */
/* DO NOT EDIT MANUALLY */
// This file is being included by "base/plugins.cpp"
EOF

for engine in $_sorted_engines; do
	if test "`get_engine_sub $engine`" = "no" ; then
		j=`echo $engine | tr '[:lower:]' '[:upper:]'`
		cat >> engines/plugins_table.h << EOF
#if PLUGIN_ENABLED_STATIC($j)
LINK_PLUGIN($j)
#endif
EOF
	fi
done