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dnl Process this file with autoconf to produce a configure script.

dnl %CopyrightBegin%
dnl
dnl Copyright Ericsson AB 1998-2010. All Rights Reserved.
dnl
dnl The contents of this file are subject to the Erlang Public License,
dnl Version 1.1, (the "License"); you may not use this file except in
dnl compliance with the License. You should have received a copy of the
dnl Erlang Public License along with this software. If not, it can be
dnl retrieved online at http://www.erlang.org/.
dnl
dnl Software distributed under the License is distributed on an "AS IS"
dnl basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
dnl the License for the specific language governing rights and limitations
dnl under the License.
dnl
dnl %CopyrightEnd%

AC_PREREQ(2.8)dnl

AC_INIT()

LM_PRECIOUS_VARS

default_cache_file=./config.cache

if test "x$no_recursion" != "xyes" -a "x$OVERRIDE_CONFIG_CACHE" = "x"; then
    # The no_recursion variable is not documented, but the only
    # action we take on it is disabling caching which is safe!
    if test "x$cache_file" != "x$default_cache_file"; then
echo "Ignoring the --cache-file argument since it can cause the system to be erroneously configured"
    fi
    echo "Disabling caching"
    if test -f $cache_file; then
echo "Removing cache file $cache_file"
rm -f $cache_file
    fi
    cache_file=/dev/null
fi

case "X$ERL_TOP" in
    X)
;;
    X/*)
test -f $ERL_TOP/erts/emulator/beam/beam_emu.c || {
AC_MSG_ERROR([Invalid \$ERL_TOP])
}
srcdir="$ERL_TOP";;
    *)
AC_MSG_ERROR([\$ERL_TOP needs to be absolute]);;
esac

dnl How to set srcdir absolute is taken from the GNU Emacs distribution
#### Make srcdir absolute, if it isn't already. It's important to
#### avoid running the path through pwd unnecessary, since pwd can
#### give you automounter prefixes, which can go away.
case "${srcdir}" in
  /* ) ;;
  . )
    ## We may be able to use the $PWD environment variable to make this
    ## absolute. But sometimes PWD is inaccurate.
    ## Make sure CDPATH doesn't affect cd (in case PWD is relative).
    CDPATH=
    if test "${PWD}" != "" && test "`(cd ${PWD} ; sh -c pwd)`" = "`pwd`" ;
    then
      srcdir="$PWD"
    else
      srcdir="`(cd ${srcdir}; pwd)`"
    fi
  ;;
  * ) srcdir="`(cd ${srcdir}; pwd)`" ;;
esac

#
# Now srcdir is absolute and also the top of Erlang distribution, ERL_TOP.
#
test "X$ERL_TOP" != "X" || ERL_TOP="$srcdir"
AC_SUBST(ERL_TOP)

dnl
dnl Aux programs are found in erts/autoconf
dnl
AC_CONFIG_AUX_DIR(${srcdir}/erts/autoconf)

dnl
dnl Figure out what we are running on. And in violation of autoconf
dnl style assume that $host is also what we are building for. I would
dnl like to get cross compiling working, since we actually have
dnl systems we cross compile for!
dnl

if test "X$host" != "Xfree_source" -a "X$host" != "Xwin32"; then
    AC_CANONICAL_HOST
fi

TARGET=$host
AC_SUBST(TARGET)

if test X$cross_compiling = Xyes; then
    CROSS_COMPILING=yes
else
    CROSS_COMPILING=no
fi
AC_SUBST(CROSS_COMPILING)


AC_ARG_ENABLE(bootstrap-only,
[ --enable-bootstrap-only enable bootstrap only configuration],
[ if test "X$enableval" = "Xyes"; then
     BOOTSTRAP_ONLY=yes
  else
     BOOTSTRAP_ONLY=no
  fi
],
BOOTSTRAP_ONLY=no)

AC_SUBST(BOOTSTRAP_ONLY)

if test $CROSS_COMPILING = yes -a $BOOTSTRAP_ONLY = yes; then
    AC_MSG_ERROR([Cannot both cross compile and build a bootstrap system])
fi

dnl Checks for programs.

AC_PROG_CC
AC_PROG_CXX
AC_CHECK_TOOL(LD, [ld])

#
# We need GNU make, complain if we can't find it
#
AC_MSG_CHECKING(for GNU make)
# If there is a Makefile created we don't want make to start making, run
# in a subdirectory and -f /dev/null
MAKE_PROG=x
if test X"$CLEARCASE_MAKE_COMPAT" = X"gnu" -a X"$CLEARCASE_ROOT" != X"" ; then
  eval clearmake -version 2>&1 | grep clearmake > /dev/null 2>&1
  case $? in
0) MAKE_PROG="clearmake -V";;
*);;
  esac
fi
if test X"$MAKE_PROG" = X"x"; then
  mkdir conftestmake
  if test -d conftestmake; then
    cd conftestmake
    for m in make gmake ggmake; do
      eval $m --version -f /dev/null 2>&1 | grep GNU > /dev/null 2>&1
      case $? in
        0) MAKE_PROG=$m ; break ;;
        *) ;;
      esac
    done
    cd ..
  else
    AC_MSG_ERROR(could not create subdirectory)
  fi
fi
rm -rf conftestmake
case $MAKE_PROG in
    x) AC_MSG_RESULT(no)
       AC_MSG_ERROR(GNU make is required!)
       ;;
    *) AC_MSG_RESULT(yes ($MAKE_PROG))
       AC_SUBST(MAKE_PROG)
       ;;
esac

AC_PROG_INSTALL
if test X"${INSTALL}" = "X${ac_aux_dir}/install-sh -c" && test -f /usr/ucb/install ; then
   case $host_os in
      osf*) ;;
      *) INSTALL="/usr/ucb/install -c" ;;
   esac
fi

AC_PROG_LN_S
AC_PROG_RANLIB

#
# Get erts version and otp release from erts/vsn.mk
#
AC_MSG_CHECKING([ERTS version])
[ERTS_VSN=`sed -n "s/^VSN[ ]*=[ ]*\(.*\)/\1/p" < $ERL_TOP/erts/vsn.mk`]
AC_MSG_RESULT([$ERTS_VSN])
AC_SUBST(ERTS_VSN)

AC_MSG_CHECKING([OTP release])
[OTP_REL=`sed -n "s/^SYSTEM_VSN[ ]*=[ ]*\(.*\)/\1/p" < $ERL_TOP/erts/vsn.mk`]
AC_MSG_RESULT([$OTP_REL])
AC_SUBST(OTP_REL)

AC_ARG_ENABLE(threads,
[ --enable-threads enable async thread support
  --disable-threads disable async thread support])

AC_ARG_ENABLE(halfword-emulator,
[ --enable-halfword-emulator enable halfword emulator (only for 64bit builds)
  --disable-halfword-emulator disable halfword emulator (only for 64bit builds)])

AC_ARG_ENABLE(smp-support,
[ --enable-smp-support enable smp support
  --disable-smp-support disable smp support])

AC_ARG_WITH(termcap,
[ --with-termcap use termcap (default)
  --without-termcap do not use any termcap libraries (ncurses,curses,termcap,termlib)])

AC_ARG_ENABLE(kernel-poll,
[ --enable-kernel-poll enable kernel poll support])

AC_ARG_ENABLE(hipe,
[ --enable-hipe enable hipe support
  --disable-hipe disable hipe support])

AC_ARG_WITH(javac,
[ --with-javac=JAVAC specify Java compiler to use
  --with-javac use a Java compiler if found (default)
  --without-javac don't use any Java compiler])

AC_ARG_ENABLE(megaco_flex_scanner_lineno,
[ --enable-megaco-flex-scanner-lineno enable megaco flex scanner lineno
  --disable-megaco-flex-scanner-lineno disable megaco flex scanner lineno])

AC_ARG_ENABLE(megaco_reentrant_flex_scanner,
[ --enable-megaco-reentrant-flex-scanner enable reentrans megaco flex scanner
  --disable-megaco-reentrant-flex-scanner disable reentrans megaco flex scanner])

AC_ARG_WITH(ssl,
[ --with-ssl=PATH specify location of OpenSSL include and lib
  --with-ssl use SSL (default)
  --without-ssl don't use SSL])

AC_ARG_ENABLE(dynamic-ssl-lib,
[ --enable-dynamic-ssl-lib force using dynamic openssl libraries
  --disable-dynamic-ssl-lib disable using dynamic openssl libraries])

AC_ARG_ENABLE(shared-zlib,
[ --enable-shared-zlib enable using shared zlib library
  --disable-shared-zlib disable shared zlib, compile own zlib source (default)])

dnl This functionality has been lost along the way... :(
dnl It could perhaps be nice to reintroduce some day; therefore,
dnl it is not removed just commented out.
dnl
dnl #
dnl # Set Erlang man page directory
dnl #
dnl AC_ARG_ENABLE(erlang-mandir,
dnl [ --disable-erlang-mandir do not install Erlang man pages in a private directory],
dnl [ case "$enableval" in
dnl no) erl_mandir=$mandir ;;
dnl *) erl_mandir='$(erlang_libdir)/man' ;;
dnl esac ], erl_mandir='$(erlang_libdir)/man')
dnl AC_SUBST(erl_mandir)

AC_ARG_ENABLE(darwin-universal,
[ --enable-darwin-universal build universal binaries on darwin i386],
[ case "$enableval" in
    no) enable_darwin_universal=no ;;
    *) enable_darwin_univeral=yes ;;
  esac
],enable_darwin_universal=no)


AC_ARG_ENABLE(darwin-64bit,
[ --enable-darwin-64bit build 64bit binaries on darwin],
[ case "$enableval" in
    no) enable_darwin_64bit=no ;;
    *) enable_darwin_64bit=yes ;;
  esac
],enable_darwin_64bit=no)

AC_ARG_ENABLE(m64-build,
[ --enable-m64-build build 64bit binaries using the -m64 flag to (g)cc],
[ case "$enableval" in
    no) enable_m64_build=no ;;
    *) enable_m64_build=yes ;;
  esac
],enable_m64_build=no)

AC_ARG_ENABLE(m32-build,
[ --enable-m32-build build 32bit binaries using the -m32 flag to (g)cc],
[ case "$enableval" in
    no) enable_m32_build=no ;;
    *)
if test X${enable_darwin_64bit} = Xyes -o X${enable_m64_build} = Xyes;
then
AC_MSG_ERROR([(--enable-darwin-64bit or --enable-m64-build) and --enable-m32-build are mutually exclusive]) ;
fi ;
enable_m32_build=yes ;;
  esac
],enable_m32_build=no)

dnl OK, we might have darwin switches off different kinds, lets
dnl check it all before continuing.
TMPSYS=`uname -s`-`uname -m`
if test X${enable_darwin_universal} = Xyes; then
if test X${enable_darwin_64bit} = Xyes; then
AC_MSG_ERROR([--enable-darwin-universal and --enable-darwin-64bit mutually exclusive])
fi
enable_hipe=no
CFLAGS="-arch i386 -arch ppc $CFLAGS"
export CFLAGS
LDFLAGS="-arch i386 -arch ppc $LDFLAGS"
export LDFLAGS
fi
if test X${enable_darwin_64bit} = Xyes; then
case "$TMPSYS" in
Darwin-i386|Darwin-x86_64)
;;
Darwin*)
AC_MSG_ERROR([--enable-darwin-64bit only supported on x86 hosts])
;;
*)
AC_MSG_ERROR([--enable-darwin-64bit only supported on Darwin])
;;
esac
enable_hipe=no
CFLAGS="-m64 $CFLAGS"
export CFLAGS
LDFLAGS="-m64 $LDFLAGS"
export LDFLAGS
elif test X"$TMPSYS" '=' X"Darwin-i386"; then
CFLAGS="-m32 $CFLAGS"
export CFLAGS
LDFLAGS="-m32 $LDFLAGS"
export LDFLAGS
fi

if test X${enable_m64_build} = Xyes; then
enable_hipe=no
CFLAGS="-m64 $CFLAGS"
export CFLAGS
LDFLAGS="-m64 $LDFLAGS"
export LDFLAGS
fi
if test X${enable_m32_build} = Xyes; then
enable_hipe=no
CFLAGS="-m32 $CFLAGS"
export CFLAGS
LDFLAGS="-m32 $LDFLAGS"
export LDFLAGS
fi

export ERL_TOP
AC_CONFIG_SUBDIRS(lib erts)

AC_CONFIG_FILES([Makefile])
AC_CONFIG_FILES([make/emd2exml], [chmod +x make/emd2exml])

AC_OUTPUT

pattern="lib/*/SKIP"
files=`echo $pattern`
if test "$files" != "$pattern"; then
  echo '*********************************************************************'
  echo '********************** APPLICATIONS DISABLED **********************'
  echo '*********************************************************************'
  echo
  for skipfile in $files; do
    app=`dirname $skipfile`; app=`basename $app`
    printf "%-15s: " $app; cat $skipfile
  done
  echo
  echo '*********************************************************************'
fi
pattern="lib/*/CONF_INFO"
files=`echo $pattern`
if test "$files" != "$pattern"; then
  echo '*********************************************************************'
  echo '********************** APPLICATIONS INFORMATION *******************'
  echo '*********************************************************************'
  echo
  for infofile in $files; do
    app=`dirname $infofile`; app=`basename $app`
    printf "%-15s: " $app; cat $infofile
  done
  echo
  echo '*********************************************************************'
fi
if test -f "erts/doc/CONF_INFO"; then
  echo '*********************************************************************'
  echo '********************** DOCUMENTATION INFORMATION ******************'
  echo '*********************************************************************'
  echo
  printf "%-15s: \n" documentation;
  havexsltproc="yes"
  for cmd in `cat erts/doc/CONF_INFO`; do
echo " $cmd is missing."
  if test $cmd = "xsltproc"; then
    havexsltproc="no"
  fi
  done
  if test $havexsltproc = "no"; then
    echo ' The documentation can not be built.'
  else
    echo ' Using fakefop to generate placeholder PDF files.'
  fi
  echo
  echo '*********************************************************************'
fi
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