configure

#!/bin/bash

if [ "$1" = "-h" -o "$1" = "--help" ]; then
echo "Usage: ./configure [options]"
echo ""
echo "available options:"
echo ""
echo "  --help                   print this message"
echo "  --enable-debug           adds -g, doesn't strip"
echo "  --enable-gprof           adds -pg, doesn't strip"
echo "  --enable-pic             build position-independent code"
echo "  --enable-shared          build libutvideo.so"
echo "  --disable-static         do not build libutvideo.a"
echo "  --optlevel=olev          GCC optimization level [0-3, s, fast] (2)"
echo "  --enable-asm=ARCH        Enable assembly optimizations for ARCH [x86, x64]"
echo "  --extra-cppflags=EFLAGS  add EFLAGS to CPPFLAGS"
echo "  --extra-cxxflags=EFLAGS  add EFLAGS to CXXFLAGS"
echo "  --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS"
echo "  --extra-soflags=ESOFLAGS add ESOFLAGS to SOFLAGS"
echo "  --host=HOST              build programs to run on HOST"
echo "  --cross-prefix=PREFIX    use PREFIX for compilation tools"
echo "  --sysroot=SYSROOT        root of cross-build tree"
echo ""
exit 1
fi

log_check() {
    echo -n "checking $1... " >> config.log
}

log_ok() {
    echo "yes" >> config.log
}

log_fail() {
    echo "no" >> config.log
}

log_msg() {
    echo "$1" >> config.log
}

cpp_check() {
    log_check "whether $3 is true"
    rm -f conftest.c
    [ -n "$1" ] && echo "#include <$1>" > conftest.c
    echo -e "#if !($3) \n#error $4 \n#endif " >> conftest.c

    if $CC conftest.c $CPPFLAGS $2 -E -o conftest >conftest.log 2>&1; then
        res=$?
        log_ok
    else
        res=$?
        log_fail
        log_msg "--------------------------------------------------"
        cat conftest.log >> config.log
        log_msg "--------------------------------------------------"
    fi
    return $res
}

cc_check() {
    if [ -z "$3" ]; then
        if [ -z "$1$2" ]; then
            log_check "whether $CC works"
        elif [ -z "$1" ]; then
            log_check "for $2"
        else
            log_check "for $1"
        fi
    elif [ -z "$1" ]; then
        log_check "whether $CC supports $3"
    else
        log_check "for $3 in $1";
    fi
    rm -f conftest.c
    [ -n "$1" ] && echo "#include <$1>" > conftest.c
    echo "int main () { $3 return 0; }" >> conftest.c
    if $CC conftest.c $CPPFLAGS $CFLAGS $2 $LDFLAGS -o conftest >conftest.log 2>&1; then
        res=$?
        log_ok
    else
        res=$?
        log_fail
        log_msg "Failed commandline was:"
        log_msg "--------------------------------------------------"
        log_msg "$CC conftest.c $CFLAGS $LDFLAGS $2"
        cat conftest.log >> config.log
        log_msg "--------------------------------------------------"
    fi
    return $res
}

cxx_check() {
    if [ -z "$3" ]; then
        if [ -z "$1$2" ]; then
            log_check "whether $CXX works"
        elif [ -z "$1" ]; then
            log_check "for $2"
        else
            log_check "for $1"
        fi
    elif [ -z "$1" ]; then
        log_check "whether $CXX supports $3"
    else
        log_check "for $3 in $1";
    fi
    rm -f conftest.c
    [ -n "$1" ] && echo "#include <$1>" > conftest.c
    echo "int main () { $3 return 0; }" >> conftest.c
    if $CXX conftest.c $CPPFLAGS $CXXFLAGS $2 $LDFLAGS -o conftest >conftest.log 2>&1; then
        res=$?
        log_ok
    else
        res=$?
        log_fail
        log_msg "Failed commandline was:"
        log_msg "--------------------------------------------------"
        log_msg "$CXX conftest.c $CXXFLAGS $LDFLAGS $2"
        cat conftest.log >> config.log
        log_msg "--------------------------------------------------"
    fi
    return $res
}

define() {
    echo "#define $1$([ -n "$2" ] && echo " $2" || echo " 1")" >> config.h
}

die() {
    log_msg "DIED: $@"
    echo "$@"
    exit 1
}

prefix='/usr/local'
exec_prefix='${prefix}'
bindir='${exec_prefix}/bin'
libdir='${exec_prefix}/lib'
includedir='${prefix}/include'
DEVNULL='/dev/null'
UTV_CORE_DIR='utv_core'

debug="no"
gprof="no"
pic="no"
shared="no"
static="yes"
postproc="no"

CXXFLAGS="$CXXFLAGS -Wall -Wextra -Wno-multichar -Wno-unused-parameter -Wno-sign-compare"
LDFLAGS="$LDFLAGS"
ASMFLAGS="-g -Xgnu"
SOFLAGS="$SOFLAGS"
HAVE_GETOPT_LONG=1
olev="2"
assembly="no"
cross_prefix=""

# parse options

for opt do
    optarg="${opt#*=}"
    case "$opt" in
        --prefix=*)
            prefix="$optarg"
            ;;
        --exec-prefix=*)
            exec_prefix="$optarg"
            ;;
        --bindir=*)
            bindir="$optarg"
            ;;
        --libdir=*)
            libdir="$optarg"
            ;;
        --includedir=*)
            includedir="$optarg"
            ;;
        --optlevel=*)
            olev="$optarg"
            ;;
        --enable-asm=*)
            assembly="yes"
            ARCH="$optarg"
            ;;
        --extra-cppflags=*)
            CPPFLAGS="$CPPFLAGS ${opt#--extra-cppflags=}"
            ;;
        --extra-cxxflags=*)
            CXXFLAGS="$CXXFLAGS ${opt#--extra-cxxflags=}"
            ;;
        --extra-ldflags=*)
            LDFLAGS="$LDFLAGS ${opt#--extra-ldflags=}"
            ;;
        --extra-soflags=*)
            SOFLAGS="$SOFLAGS ${opt#--extra-soflags=}"
            ;;
        --enable-debug)
            debug="yes"
            ;;
        --enable-gprof)
            CFLAGS="$CFLAGS -pg"
            LDFLAGS="$LDFLAGS -pg"
            gprof="yes"
            ;;
        --enable-pic)
            pic="yes"
            ;;
        --enable-shared)
            shared="yes"
            ;;
        --disable-static)
            static="no"
            ;;
        --host=*)
            host="${opt#--host=}"
            ;;
        --cross-prefix=*)
            cross_prefix="${opt#--cross-prefix=}"
            ;;
        --sysroot=*)
            CFLAGS="$CFLAGS --sysroot=${opt#--sysroot=}"
            LDFLAGS="$LDFLAGS --sysroot=${opt#--sysroot=}"
            ;;
        *)
            echo "Unknown option $opt, ignored"
            ;;
    esac
done

CC="${CC-${cross_prefix}gcc}"
CXX="${CXX-${cross_prefix}g++}"
AR="${AR-${cross_prefix}ar}"
RANLIB="${RANLIB-${cross_prefix}ranlib}"
STRIP="${STRIP-${cross_prefix}strip}"
ASM="nasm"
RC=""

# Add check for Clang vs. GCC later, but for right now, just assume GCC
STDCXX=-lstdc++

if [ -z "$host" -a -z "$cross_prefix" ]; then    
    host=`./config.guess`
else
    host="${cross_prefix%%-}"
fi
# normalize a triplet into a quadruplet
host=`./config.sub $host`

# split $host
host_cpu="${host%%-*}"
host="${host#*-}"
host_vendor="${host%%-*}"
host_os="${host#*-}"

case $host_os in
  beos*)
    SYS="BEOS"
    ;;
  darwin*)
    SYS="MACOSX"
    if [ "$pic" = "no" ]; then
        cc_check "" -mdynamic-no-pic && CFLAGS="$CFLAGS -mdynamic-no-pic"
    fi
    ;;
  freebsd*)
    SYS="FREEBSD"
    ;;
  kfreebsd*-gnu)
    SYS="FREEBSD"
    ;;
  netbsd*)
    SYS="NETBSD"
    ;;
  openbsd*)
    SYS="OPENBSD"
    ;;
  *linux*)
    SYS="LINUX"
    ;;
  cygwin*)
    SYS="MINGW"
    EXE=".exe"
    DEVNULL="NUL"
    pic="no"
    if cc_check "" -mno-cygwin; then
        CFLAGS="$CFLAGS -mno-cygwin"
        CXXFLAGS="$CXXFLAGS -mno-cygwin"
        LDFLAGS="$LDFLAGS -mno-cygwin"
    fi
    ;;
  mingw*)
    SYS="MINGW"
    EXE=".exe"
    DEVNULL="NUL"
    ;;
  sunos*|solaris*)
    SYS="SunOS"
    ;;
  *)
    die "Unknown system $host, edit the configure"
    ;;
esac

! cc_check && die "no working c compiler found
! cxx_check && die "no working c++ compiler found

if cc_check '' -std=gnu99 ; then
    CFLAGS="$CFLAGS -std=gnu99"
elif cc_check '' -std=c99 ; then
    CFLAGS="$CFLAGS -std=c99"
    CPPFLAGS="$CPPFLAGS -D_POSIX_C_SOURCE=200112L -D_BSD_SOURCE -U__STRICT_ANSI__"
fi

if cpp_check '' '' "defined(_WIN32)" ; then
    pic="no"
fi

#COM functions on windows
cc_check "objbase.h" "-lole32" "CoUninitialize();" && LDFLAGS="$LDFLAGS -lole32"

CPPFLAGS="$CPPFLAGS"
LDFLAGS="$LDFLAGS"

# god do not shadow...
#if cc_check '' -Wshadow ; then
#    CFLAGS="-Wshadow $CFLAGS"
#    CXXFLAGS="-Wshadow $CXXFLAGS"
#fi

if [ "$static" = "no" ] ; then
    STATICLIB=""
    STDCXX_SHARED="$STDCXX"
else
    STATICLIB='$(UTV_CORE_DIR)/libutvideo.a'
    if [ "$shared" = "no" ] ; then
        STDCXX_STATIC="$STDCXX"
    else
        STDCXX_SHARED="$STDCXX"
    fi
fi

if [ "$pic" = "yes" ] ; then
    CFLAGS="$CFLAGS -fPIC"
    CXXFLAGS="$CXXFLAGS -fPIC"
    # resolve textrels in the x86 asm
    cc_check stdio.h -Wl,-Bsymbolic && LDFLAGS="$LDFLAGS -Wl,-Bsymbolic"
fi

if [ "$debug" != "yes" -a "$gprof" != "yes" ] ; then
    CFLAGS="$CFLAGS -s -fomit-frame-pointer"
    CXXFLAGS="$CXXFLAGS -s -fomit-frame-pointer"
    LDFLAGS="$LDFLAGS -s"
fi
if [ "$debug" = "yes" ] ; then
    CFLAGS="$CFLAGS -g"
    CXXFLAGS="$CXXFLAGS -g"
    olev="0"
		      test "x$?" != "x0" && pkg_failed=yes
fi

if [ "$optlevel" != "no" -a "$olev" = "0" ] ; then
    CFLAGS="$CFLAGS"
    CXXFLAGS="$CXXFLAGS"
else
    CFLAGS="-O$olev $CFLAGS"
    CXXFLAGS="-O$olev $CXXFLAGS"
fi

if [ "$assembly" = "yes" -a "$shared" = "yes" ] ; then
    msg="--enable-asm is incompatible with --enable-shared"
    echo $msg
    log_msg "$msg"
    assembly="no"
    ARCH=
fi

if [ "$ARCH" = "x86" ] ; then
    ARCH=x86
    ARCHREPORT=yes
fi

if [ "$ARCH" = "x64" ] ; then
    ARCH=x64
    ARCHREPORT=yes
fi

if [ "$ARCH" = "" ] ; then
    ARCHREPORT=no
fi

if [ "$ARCHREPORT" != "no" ] ; then
    ARCHREPORT=$ARCH
fi

if [ "$shared" = "yes" -a "$SYS" = "MINGW" ] ; then
    LDFLAGS="$LDFLAGS -lstrmiids"
fi

rm -f conftest*

cat > config.mak << EOF
prefix=$prefix
exec_prefix=$exec_prefix
bindir=$bindir
libdir=$libdir
includedir=$includedir
API=$API
CC=$CC
CXX=$CXX
ASM=$ASM
CPPFLAGS=$CPPFLAGS
CFLAGS=$CFLAGS
CXXFLAGS=$CXXFLAGS
LDFLAGS=$LDFLAGS
ASMFLAGS=$ASMFLAGS
AR=$AR
RANLIB=$RANLIB
RANLIBX=$RANLIB
STRIP=$STRIP
EXE=$EXE
DEVNULL=$DEVNULL
SOFLAGS_USER=$SOFLAGS
ARCH=$ARCH
SYS=$SYS
UTV_CORE_DIR=$UTV_CORE_DIR
STATICLIB=$STATICLIB
RC=$RC
EOF

# This messy block was made necessary by changes in how
# Ut Video generates its version info.
echo "#include \"utv_core/version.h\"">>version.c
echo "#include <stdio.h>">>version.c
echo "main() {">>version.c
echo "printf(\"%s\\n\", UTVIDEO_VERSION_STR);">>version.c
echo "}">>version.c

sed -i 's/    /\n/g' version.c

$CC -o version$EXE version.c

UTVIDEO_VERSION_MASTER=`echo $(./version$EXE | sed 's/\r//g')`
#end of messy version generating block

if [ "$static" = "yes" -a "$shared" = "no" ] ; then
        echo 'default: $(STATICLIB)' >> config.mak
fi

if [ "$shared" = "yes" ] ; then
    API=$UTVIDEO_VERSION_MASTER
    if [ "$SYS" = "MINGW" ] ; then
        echo "SONAME=libutvideo-${API}.dll" >> config.mak
        echo 'SOFLAGS=-Wl,--out-implib,$(IMPLIBNAME) -Wl,--enable-auto-image-base' >> config.mak
        echo "IMPLIBNAME=libutvideo-${API}.dll.a" >> config.mak
    elif [ "$SYS" = "MACOSX" ] ; then
        echo "SOSUFFIX=dylib" >> config.mak
        echo "SONAME=libutvideo.$API.dylib" >> config.mak
        echo 'SOFLAGS=-dynamiclib -Wl,-single_module -Wl,-read_only_relocs,suppress -install_name $(DESTDIR)$(libdir)/$(SONAME)' >> config.mak
    elif [ "$SYS" = "SunOS" ] ; then
        echo "SOSUFFIX=so" >> config.mak
        echo "SONAME=libutvideo.so.$API" >> config.mak
        echo 'SOFLAGS=-Wl,-h,$(SONAME)' >> config.mak
    else
        echo "SOSUFFIX=so" >> config.mak
        echo "SONAME=libutvideo.so.$API" >> config.mak
        echo 'SOFLAGS=-Wl,-soname,$(SONAME)' >> config.mak
    fi
    if [ "$static" = "yes" ] ; then
        echo 'default: $(STATICLIB) $(SONAME)' >> config.mak
    else
        echo 'default: $(SONAME)' >> config.mak
    fi
fi

cat > libutvideo.pc << EOF
prefix=$prefix
exec_prefix=$exec_prefix
libdir=$libdir
includedir=$includedir

Name: libutvideo
Description: Ut Video Codec Suite
Version: $UTVIDEO_VERSION_MASTER
Libs: -L$libdir -lutvideo $STDCXX_STATIC
Libs.private: $STDCXX_SHARED
Cflags: -I$includedir
EOF

cat > conftest.log <<EOF
OS:         $SYS
asm:        $ARCHREPORT
debug:      $debug
gprof:      $gprof
PIC:        $pic
static:     $static
shared:     $shared
optlevel:   $olev
EOF

echo >> config.log
cat conftest.log >> config.log
cat conftest.log
rm conftest.log
rm version.c
rm version$EXE

echo
echo "You can run 'make' now."