#!/bin/sh
#
# qemacs configure script (c) 2002 Fabrice Bellard
#
# set temporary file name
if test ! -z "$TMPDIR" ; then
    TMPDIR1="${TMPDIR}"
elif test ! -z "$TEMPDIR" ; then
    TMPDIR1="${TEMPDIR}"
else
    TMPDIR1="/tmp"
fi

TMPC="${TMPDIR1}/qemacs-conf-${RANDOM}-$$-${RANDOM}.c"
TMPO="${TMPDIR1}/qemacs-conf-${RANDOM}-$$-${RANDOM}.o"
TMPS="${TMPDIR1}/qemacs-conf-${RANDOM}-$$-${RANDOM}.S"
TMPH="${TMPDIR1}/qemacs-conf-${RANDOM}-$$-${RANDOM}.h"

# default parameters
prefix="/usr/local"
cross_prefix=""
cc="gcc"
host_cc="gcc"
ar="ar"
make="make"
strip="strip"
cpu=`uname -m`
case "$cpu" in
  i386|i486|i586|i686|i86pc|BePC)
    cpu="x86"
  ;;
  armv4l)
    cpu="armv4l"
  ;;
  alpha)
    cpu="alpha"
  ;;
  *)
    cpu="unknown"
  ;;
esac
gprof="no"
network="yes"
win32="no"
cygwin="no"
lshared="no"
extralibs="-lm"
simpleidct="yes"
bigendian="no"
mpegaudio_hp="yes"

tiny="no"
x11="yes"
xv="yes"
xrender="no"
png="yes"
ffmpeg="no"
html="yes"
plugins="yes"
initcalls="yes"
exe=""

# OS specific
targetos=`uname -s`
case $targetos in
  BeOS)
    prefix="/boot/home/config"
    # helps building libavcodec
    CFLAGS="-O2 -DPIC"
    # no need for libm, but the inet stuff
    # Check for BONE
    if (echo $BEINCLUDES|grep 'headers/be/bone' >/dev/null); then
        extralibs="-lbind -lsocket"
    else
        echo "Not sure building for net_server will succeed... good luck."
    extralibs="-lsocket"
    fi ;;
  BSD/OS)
    extralibs="-lpoll -lgnugetopt -lm"
    make="gmake"
    ;;
  CYGWIN*)
    cygwin="yes"
    ;;
  *) ;;
esac

# find source path
# XXX: we assume an absolute path is given when launching configure, 
# except in './configure' case.
source_path=${0%configure}
source_path=${source_path%/}
source_path_used="yes"
if test -z "$source_path" -o "$source_path" = "." ; then
    source_path=`pwd`
    source_path_used="no"
fi

if test -d ./ffmpeg ; then
    ffmpeg="yes"
    ffmpeg_srcdir="./ffmpeg"
fi

if test ! -f /usr/include/png.h ; then
    png="no"
fi

for opt do
  case "$opt" in
  --prefix=*) prefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --source-path=*) source_path=`echo $opt | cut -d '=' -f 2`
  ;;
  --cross-prefix=*) cross_prefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --cc=*) cc=`echo $opt | cut -d '=' -f 2`
  ;;
  --make=*) make=`echo $opt | cut -d '=' -f 2`
  ;;
  --extra-cflags=*) CFLAGS="${opt#--extra-cflags=}"
  ;;
  --extra-ldflags=*) LDFLAGS="${opt#--extra-ldflags=}"
  ;;
  --extra-libs=*) extralibs=${opt#--extra-libs=}
  ;;
  --cpu=*) cpu=`echo $opt | cut -d '=' -f 2`
  ;;
  --enable-gprof) gprof="yes"
  ;;
  --disable-network) network="no"
  ;;
  --enable-win32) win32="yes"
  ;;
  --enable-cygwin) cygwin="yes" ;
  ;;
  --enable-shared) lshared="yes"
  ;;
  --disable-mpegaudio-hp) mpegaudio_hp="no"
  ;;
  --enable-tiny) tiny="yes"
  ;;
  --disable-x11) x11="no"
  ;;
  --disable-xv) xv="no"
  ;;
  --disable-xrender) xrender="no"
  ;;
  --disable-png) png="no"
  ;;
  --disable-html) html="no"
  ;;
  --disable-plugins) plugins="no"
  ;;
  --with-ffmpegdir=*)  ffmpeg_srcdir=${opt#--with-ffmpegdir=} ; ffmpeg="yes"
  ;;
  --with-ffmpeglibdir=*)  ffmpeg_libdir=${opt#--with-ffmpeglibdir=}
  ;;
  esac
done

# Checking for CFLAGS
if test -z "$CFLAGS"; then
    CFLAGS="-O2"
fi

if test "$win32" = "yes" ; then
    cross_prefix="i386-mingw32msvc-"
    network="no"
    exe=".exe"
fi

if test "$cygwin" = "yes" ; then
    plugins="no"
    x11="no"
    xv="no"
    xrender="no"
    png="no"
    ffmpeg="no"
    html="no"
    plugins="no"
    initcalls="no"
    exe=".exe"
fi

# endianness : guess with cpu type. Should also use prefix
if test "$cpu" = "powerpc"; then
    bigendian="yes"
fi

cc="${cross_prefix}${cc}"
ar="${cross_prefix}${ar}"
strip="${cross_prefix}${strip}"

# ---
# check availability of some header files

cat > $TMPC << EOF
#include <malloc.h>
int main( void ) { return 0; }
EOF

_memalign=no
_malloc_h=no
if $cc -o $TMPO $TMPC 2> /dev/null ; then
    _malloc_h=yes
    _memalign=yes
    # check for memalign - atmos
    cat > $TMPC << EOF
#include <malloc.h>
int main (void) {
  char *string = NULL;
  string = memalign(64, sizeof(char));
  return 0;
}
EOF
    $cc -o $TMPO $TMPC 2> /dev/null || _memalign=no
fi

if test "$ffmpeg" = "yes" ; then
    if test -z "$ffmpeg_libdir" ; then
        ffmpeg_libdir="$ffmpeg_srcdir"
    fi
fi

if test "$tiny" = "yes" ; then
    x11="no"
    ffmpeg="no"
fi

if test -z "$CFLAGS"; then
    CFLAGS="-O2"
fi


# check gcc version
cat > $TMPC <<EOF
int main(void) {
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)
return 0;
#else
#error gcc < 3.2
#endif
}
EOF

gcc_major="2"
if $cc -o $TMPO $TMPC 2> /dev/null ; then
   gcc_major="3"
fi

if test x"$1" = x"-h" -o x"$1" = x"--help" ; then
cat << EOF

Usage: configure [options]
Options: [defaults in brackets after descriptions]

EOF
echo "Standard options:"
echo "  --help                   print this message"
echo "  --prefix=PREFIX          install in PREFIX [$prefix]"
echo "  --enable-win32           enable win32 cross compile"
echo "  --enable-cygwin          compile for cygwin systems"
echo "  --disable-x11            disable Xwindow support"
echo "  --disable-xv             disable Xvideo extension support"
echo "  --disable-xrender        disable Xrender extension support"
echo "  --enable-tiny            build a very small version"
echo "  --disable-html           disable graphical html support"
echo "  --disable-png            disable png support"
echo "  --disable-plugins        disable plugins support"
echo "  --with-ffmpegdir=DIR     find ffmpeg sources and libraries in DIR"
echo "                           for audio/video/image support"
echo ""
echo "Advanced options (experts only):"
echo "  --source-path=PATH       path of source code [$source_path]"
echo "  --cross-prefix=PREFIX    use PREFIX for compile tools [$cross_prefix]"
echo "  --cc=CC                  use C compiler CC [$cc]"
echo "  --make=MAKE              use specified make [$make]"
echo "  --with-ffmpeglibdir=DIR  set ffmpeg object files directory"
echo ""
echo "NOTE: The object files are build at the place where configure is launched"
exit 1
fi

echo "Install prefix   $prefix"
echo "Source path      $source_path"
echo "C compiler       $cc"
echo "Tiny build       $tiny"
echo "X11 support      $x11"
echo "Xvideo support   $xv"
#echo "Xrender support  $xrender"
echo "libpng support   $png"
echo "Graphical HTML   $html"
echo "Plugins support  $plugins"
echo "Initcall support $initcalls"
echo "FFMPEG support   $ffmpeg"

echo "Creating config.mak and config.h"

echo "# Automatically generated by configure - do not modify" > config.mak
echo "/* Automatically generated by configure - do not modify */" > $TMPH

echo "prefix=$prefix" >> config.mak
echo "#define CONFIG_QE_PREFIX \"$prefix\"" >> $TMPH
echo "MAKE=$make" >> config.mak
echo "CC=$cc" >> config.mak
echo "GCC_MAJOR=$gcc_major" >> config.mak
echo "HOST_CC=$host_cc" >> config.mak
echo "AR=$ar" >> config.mak
echo "STRIP=$strip -s -R .comment -R .note" >> config.mak
echo "CFLAGS=$CFLAGS" >> config.mak
echo "LDFLAGS=$LDFLAGS" >> config.mak
echo "EXE=$exe" >> config.mak

if test "$cpu" = "x86" ; then
  echo "TARGET_ARCH_X86=yes" >> config.mak
  echo "#define ARCH_X86 1" >> $TMPH
elif test "$cpu" = "armv4l" ; then
  echo "TARGET_ARCH_ARMV4L=yes" >> config.mak
  echo "#define ARCH_ARMV4L 1" >> $TMPH
elif test "$cpu" = "alpha" ; then
  echo "TARGET_ARCH_ALPHA=yes" >> config.mak
  echo "#define ARCH_ALPHA 1" >> $TMPH
elif test "$cpu" = "powerpc" ; then
  echo "TARGET_ARCH_POWERPC=yes" >> config.mak
  echo "#define ARCH_POWERPC 1" >> $TMPH
fi
if test "$bigendian" = "yes" ; then
  echo "WORDS_BIGENDIAN=yes" >> config.mak
  echo "#define WORDS_BIGENDIAN 1" >> $TMPH
fi
if test "$gprof" = "yes" ; then
  echo "TARGET_GPROF=yes" >> config.mak
  echo "#define HAVE_GPROF 1" >> $TMPH
fi
if test "$lshared" = "yes" ; then
  echo "BUILD_SHARED=yes" >> config.mak
  echo "PIC=-fPIC" >> config.mak
fi
echo "EXTRALIBS=$extralibs" >> config.mak
echo -n "VERSION=" >>config.mak
echo -n `head $source_path/VERSION` >> config.mak
echo "" >> config.mak
echo -n "#define QE_VERSION \"" >> $TMPH
echo -n `head $source_path/VERSION` >> $TMPH
echo "\"" >> $TMPH
if test "$network" = "yes" ; then
  echo "#define CONFIG_NETWORK 1" >> $TMPH
  echo "CONFIG_NETWORK=yes" >> config.mak
fi

if test "$win32" = "yes" ; then
  echo "#define CONFIG_WIN32 1" >> $TMPH
  echo "CONFIG_WIN32=yes" >> config.mak
fi

if test "$cygwin" = "yes" ; then
  echo "#define CONFIG_CYGWIN 1" >> $TMPH
  echo "CONFIG_CYGWIN=yes" >> config.mak
fi

if test "$x11" = "yes" ; then
  echo "#define CONFIG_X11 1" >> $TMPH
  echo "CONFIG_X11=yes" >> config.mak
fi

if test "$xv" = "yes" ; then
  echo "#define CONFIG_XV 1" >> $TMPH
  echo "CONFIG_XV=yes" >> config.mak
fi

if test "$xrender" = "yes" ; then
  echo "#define CONFIG_XRENDER 1" >> $TMPH
  echo "CONFIG_XRENDER=yes" >> config.mak
fi

if test "$tiny" = "yes" ; then
  echo "#define CONFIG_TINY 1" >> $TMPH
  echo "CONFIG_TINY=yes" >> config.mak
fi

if test "$html" = "yes" ; then
  echo "#define CONFIG_HTML 1" >> $TMPH
  echo "CONFIG_HTML=yes" >> config.mak
fi

if test "$plugins" = "yes" ; then
  echo "#define CONFIG_DLL 1" >> $TMPH
  echo "CONFIG_DLL=yes" >> config.mak
fi

if test "$initcalls" = "yes" ; then
  echo "#define CONFIG_INIT_CALLS 1" >> $TMPH
  echo "CONFIG_INIT_CALLS=yes" >> config.mak
fi

if test "$png" = "yes" ; then
  echo "#define CONFIG_PNG_OUTPUT 1" >> $TMPH
  echo "CONFIG_PNG_OUTPUT=yes" >> config.mak
fi

if test "$ffmpeg" = "yes" ; then
  echo "#define CONFIG_FFMPEG 1" >> $TMPH
  echo "CONFIG_FFMPEG=yes" >> config.mak
  echo "FFMPEG_SRCDIR=$ffmpeg_srcdir" >> config.mak
  echo "FFMPEG_LIBDIR=$ffmpeg_libdir" >> config.mak
fi

# build tree in object directory if source path is different from current one
if test "$source_path_used" = "yes" ; then
    DIRS="tests"
    FILES="Makefile tests/Makefile"
    for dir in $DIRS ; do
            mkdir -p $dir
    done
    for f in $FILES ; do
        ln -sf $source_path/$f $f
    done
fi
echo "SRC_PATH=$source_path" >> config.mak

diff $TMPH config.h >/dev/null 2>&1
if test $? -ne 0 ; then
    mv -f $TMPH config.h
else
    echo "config.h is unchanged"
fi

rm -f $TMPC $TMPO $TMPS $TMPH $TMPE