configure

#!/bin/sh
#
# ffmpeg configure script (c) 2000, 2001, 2002 Fabrice Bellard
#

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 "  --libdir=DIR             install libs in DIR [PREFIX/lib]"
echo "  --mandir=DIR             man documentation in DIR [PREFIX/man]"
echo "  --enable-mp3lame         enable mp3 encoding via libmp3lame [default=no]"
echo "  --enable-libogg          enable ogg support via libogg [default=no]"
echo "  --enable-vorbis          enable vorbis support via libvorbis [default=no]"
echo "  --enable-theora          enable theora support via libtheora [default=no]"
echo "  --enable-faad            enable faad support via libfaad [default=no]"
echo "  --enable-faadbin         build faad support with runtime linking [default=no]"
echo "  --enable-faac            enable faac support via libfaac [default=no]"
echo "  --enable-libgsm          enable gsm support via libgsm [default=no]"
echo "  --enable-xvid            enable xvid support via xvidcore [default=no]"
echo "  --enable-x264            enable H.264 encoding via x264 [default=no]"
echo "  --enable-mingw32         enable mingw32 native/cross windows compile"
echo "  --enable-a52             enable GPL'ed A52 support [default=no]"
echo "  --enable-a52bin          open liba52.so.0 at runtime [default=no]"
echo "  --enable-dts             enable GPL'ed DTS support [default=no]"
echo "  --enable-pp              enable GPL'ed post processing support [default=no]"
echo "  --enable-shared-pp       use libpostproc.so [default=no]"
echo "  --enable-shared          build shared libraries [default=no]"
echo "  --enable-amr_nb          enable amr_nb float audio codec"
echo "  --enable-amr_nb-fixed    use fixed point for amr-nb codec"
echo "  --enable-amr_wb          enable amr_wb float audio codec"
echo "  --enable-sunmlib         use Sun medialib [default=no]"
echo "  --enable-pthreads        use pthreads [default=no]"
echo "  --enable-dc1394          enable IIDC-1394 grabbing using libdc1394 and libraw1394 [default=no]"
echo "  --enable-gpl             allow use of gpl code, the resulting libav* and ffmpeg will be under gpl [default=no]"
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 [$make]"
echo "  --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]"
echo "  --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]"
echo "  --extra-libs=ELIBS       add ELIBS [$ELIBS]"
echo "  --build-suffix=SUFFIX    suffix for application specific build []"
echo "  --cpu=CPU                force cpu to CPU  [$cpu]"
echo "  --tune=PROCESSOR         tune code for a particular CPU (may fails or misperforms on other CPUs)"
echo "  --powerpc-perf-enable    enable performance report on PPC (requires enabling PMC)"
echo "  --disable-mmx            disable mmx usage"
echo "  --disable-iwmmxt         disable iwmmxt usage"
echo "  --disable-altivec        disable AltiVec usage"
echo "  --disable-audio-oss      disable OSS audio support [default=no]"
echo "  --disable-audio-beos     disable BeOS audio support [default=no]"
echo "  --disable-v4l            disable video4linux grabbing [default=no]"
echo "  --disable-bktr           disable bktr video grabbing [default=no]"
echo "  --disable-dv1394         disable DV1394 grabbing [default=no]"
echo "  --disable-network        disable network support [default=no]"
echo "  --disable-zlib           disable zlib [default=no]"
echo "  --disable-simple_idct    disable simple IDCT routines [default=no]"
echo "  --disable-vhook          disable video hooking support"
echo "  --enable-gprof           enable profiling with gprof [$gprof]"
echo "  --disable-debug          disable debugging symbols"
echo "  --disable-opts           disable compiler optimizations"
echo "  --disable-mpegaudio-hp   faster (but less accurate)"
echo "                           mpegaudio decoding [default=no]"
echo "  --disable-ffserver       disable ffserver build"
echo "  --disable-ffplay         disable ffplay build"
echo "  --enable-small           optimize for size instead of speed"
echo "  --enable-memalign-hack   emulate memalign, interferes with memory debuggers"
echo "  --disable-strip          disable stripping of executables and shared libraries"
echo "  --enable-codec=codec     enables codec"
echo "  --disable-codec=codec    disables codec"
echo "  --disable-encoders       disables all encoders"
echo "  --disable-decoders       disables all decoders"
echo ""
echo "NOTE: The object files are build at the place where configure is launched"
exit 1
fi

# set temporary file name
if test ! -z "$TMPDIR" ; then
    TMPDIR1="${TMPDIR}"
elif test ! -z "$TEMPDIR" ; then
    TMPDIR1="${TEMPDIR}"
else
    TMPDIR1="/tmp"
fi

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

# default parameters
prefix="/usr/local"
libdir=""
mandir=""
bindir=""
cross_prefix=""
cc="gcc"
ar="ar"
ranlib="ranlib"
make="make"
strip="strip"
cpu=`uname -m`
tune="generic"
powerpc_perf="no"
mmx="default"
iwmmxt="default"
altivec="default"
mmi="default"
case "$cpu" in
  i386|i486|i586|i686|i86pc|BePC)
    cpu="x86"
  ;;
  x86_64|amd64)
    cpu="x86"
    canon_arch="`cc -dumpmachine | sed -e 's,\([^-]*\)-.*,\1,'`"
    if [ x"$canon_arch" = x"x86_64" -o x"$canon_arch" = x"amd64" ]; then
      if [ -z "`echo $CFLAGS | grep -- -m32`"  ]; then
        cpu="x86_64"
      fi
    fi
  ;;
  # armv4l is a subset of armv5tel
  armv4l|armv5tel)
    cpu="armv4l"
  ;;
  alpha)
    cpu="alpha"
  ;;
  "Power Macintosh"|ppc)
    cpu="powerpc"
  ;;
  mips)
    cpu="mips"
  ;;
  sun4u|sparc64)
    cpu="sparc64"
  ;;
  sparc)
    cpu="sparc"
  ;;
  sh4)
    cpu="sh4"
  ;;
  *)
    cpu="unknown"
  ;;
esac
gprof="no"
v4l="yes"
bktr="no"
audio_oss="yes"
audio_beos="no"
dv1394="yes"
dc1394="no"
network="yes"
zlib="yes"
libgsm="no"
mp3lame="no"
libogg="no"
vorbis="no"
theora="no"
faad="no"
faadbin="no"
faac="no"
xvid="no"
x264="no"
a52="no"
a52bin="no"
dts="no"
pp="no"
shared_pp="no"
mingw32="no"
cygwin="no"
os2="no"
lshared="no"
optimize="yes"
debug="yes"
dostrip="yes"
extralibs="-lm"
simpleidct="yes"
bigendian="no"
inttypes="yes"
emu_fast_int="no"
vhook="default"
dlfcn="no"
dlopen="no"
mpegaudio_hp="yes"
SHFLAGS=-shared
netserver="no"
need_inet_aton="no"
ffserver="yes"
ffplay="yes"
LIBOBJFLAGS=""
LDFLAGS=-Wl,--warn-common
FFSLDFLAGS=-Wl,-E
LDCONFIG="ldconfig"
LIBPREF="lib"
LIBSUF=".a"
SLIBPREF="lib"
SLIBSUF=".so"
EXESUF=""
BUILDSUF=""
amr_nb="no"
amr_wb="no"
amr_nb_fixed="no"
amr_if2="no"
sunmlib="no"
pthreads="no"
gpl="no"
memalignhack="no"

# OS specific
targetos=`uname -s`
case $targetos in
BeOS)
prefix="/boot/home/config"
# helps building libavcodec
CFLAGS="-DPIC -fomit-frame-pointer"
# 3 gcc releases known for BeOS, each with ugly bugs
gcc_version="`$cc -v 2>&1 | grep version | cut -d ' ' -f3-`"
case "$gcc_version" in
2.9-beos-991026*|2.9-beos-000224*) echo "R5/GG gcc"
mmx="no"
;;
*20010315*) echo "BeBits gcc"
CFLAGS="$CFLAGS -fno-expensive-optimizations"
;;
esac
SHFLAGS=-nostart
# disable linux things
audio_oss="no"
v4l="no"
dv1394="no"
# enable beos things
audio_beos="yes"
# no need for libm, but the inet stuff
# Check for BONE
if (echo $BEINCLUDES|grep 'headers/be/bone' >/dev/null); then
extralibs="-lbind -lsocket"
else
netserver="yes"
need_inet_aton="yes"
extralibs="-lnet"
fi ;;
SunOS)
v4l="no"
audio_oss="no"
dv1394="no"
make="gmake"
LDFLAGS=""
FFSLDFLAGS=""
need_inet_aton="yes"
extralibs="$extralibs -lsocket -lnsl"
;;
NetBSD)
v4l="no"
bktr="yes"
audio_oss="yes"
dv1394="no"
make="gmake"
LDFLAGS="$LDFLAGS -export-dynamic"
case `uname -r` in
2.*) extralibs="-lossaudio"
;;
esac
;;
OpenBSD)
v4l="no"
bktr="yes"
audio_oss="yes"
dv1394="no"
make="gmake"
LIBOBJFLAGS="\$(PIC)"
LDFLAGS="$LDFLAGS -export-dynamic -pthread"
LDCONFIG="ldconfig -m \$(libdir)"
extralibs="$extralibs -lossaudio"
;;
FreeBSD)
v4l="no"
bktr="yes"
audio_oss="yes"
dv1394="no"
make="gmake"
CFLAGS="-pthread"
LDFLAGS="$LDFLAGS -export-dynamic -pthread"
;;
BSD/OS)
v4l="no"
bktr="yes"
audio_oss="yes"
dv1394="no"
extralibs="-lpoll -lgnugetopt -lm"
make="gmake"
;;
Darwin)
cc="cc"
v4l="no"
audio_oss="no"
dv1394="no"
ffserver="no"
SHFLAGS="-dynamiclib"
extralibs=""
darwin="yes"
strip="strip -x"
LDFLAGS="-Wl,-search_paths_first"
FFSLDFLAGS=-Wl,-bind_at_load
;;
MINGW32*)
# Note: the rest of the mingw32 config is done afterwards as mingw32
# can be forced on command line for linux cross compilation
mingw32="yes"
;;
CYGWIN*)
v4l="no"
audio_oss="yes"
dv1394="no"
ffserver="no"
extralibs=""
cygwin="yes"
EXESUF=".exe"
;;
Linux)
LDFLAGS="$LDFLAGS -rdynamic"
;;
IRIX*)
ranlib="echo ignoring ranlib"
v4l="no"
audio_oss="no"
make="gmake"
;;
OS/2)
TMPE=$TMPE".exe"
ar="emxomfar -p128"
ranlib="echo ignoring ranlib"
strip="echo ignoring strip"
CFLAGS="-Zomf"
LDFLAGS="-Zomf -Zstack 16384 -s"
SHFLAGS="-Zdll -Zomf"
FFSLDFLAGS=""
LIBPREF=""
LIBSUF=".lib"
SLIBPREF=""
SLIBSUF=".dll"
EXESUF=".exe"
extralibs=""
v4l="no"
audio_oss="no"
dv1394="no"
network="no"
ffserver="no"
vhook="no"
os2="yes"

;;
*) ;;
esac

# From mplayer configure. We need TARGET_OS available
# to the Makefile, so it can distinguish between flavors
# of AltiVec on PowerPC
TARGET_OS=`( uname -s ) 2>&1`
  case "$TARGET_OS" in
  Linux|FreeBSD|NetBSD|BSD/OS|OpenBSD|SunOS|QNX|Darwin|GNU|BeOS)
    ;;
  IRIX*)
    TARGET_OS=IRIX
    ;;
  HP-UX*)
    TARGET_OS=HP-UX
    ;;
  [cC][yY][gG][wW][iI][nN]*)
    TARGET_OS=CYGWIN
    ;;
  *)
    TARGET_OS="$TARGET_OS-UNKNOWN"
    ;;
  esac

# find source path
source_path="`echo $0 | sed -e 's#/configure##'`"
source_path_used="yes"
if test -z "$source_path" -o "$source_path" = "." ; then
    source_path=`pwd`
    source_path_used="no"
else
    source_path="`cd \"$source_path\"; pwd`"
fi

FFMPEG_CONFIGURATION=" "
for opt do
  FFMPEG_CONFIGURATION="$FFMPEG_CONFIGURATION""$opt "
done

CODEC_LIST=`grep 'register_avcodec(&[a-z]' $source_path/libavcodec/allcodecs.c  | sed 's/.*&\(.*\)).*/\1/'`

for opt do
  case "$opt" in
  --prefix=*) prefix=`echo $opt | cut -d '=' -f 2`; force_prefix=yes
  ;;
  --libdir=*) libdir=`echo $opt | cut -d '=' -f 2`; force_libdir=yes
  ;;
  --mandir=*) mandir=`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 $opt | cut -d '=' -f 2`
  ;;
  --extra-cflags=*) CFLAGS="$CFLAGS ${opt#--extra-cflags=}"
  ;;
  --extra-ldflags=*) LDFLAGS="$LDFLAGS ${opt#--extra-ldflags=}"
  ;;
  --extra-libs=*) extralibs=${opt#--extra-libs=}
  ;;
  --build-suffix=*) BUILDSUF=${opt#--build-suffix=}
  ;;
  --cpu=*) cpu=`echo $opt | cut -d '=' -f 2`
  ;;
  --tune=*) tune=`echo $opt | cut -d '=' -f 2`
  ;;
  --powerpc-perf-enable) powerpc_perf="yes"
  ;;
  --disable-mmx) mmx="no"
  ;;
  --disable-iwmmxt) iwmmxt="no"
  ;;
  --disable-altivec) altivec="no"
  ;;
  --enable-gprof) gprof="yes"
  ;;
  --disable-v4l) v4l="no"
  ;;
  --disable-bktr) bktr="no"
  ;;
  --disable-audio-oss) audio_oss="no"
  ;;
  --disable-audio-beos) audio_beos="no"
  ;;
  --disable-dv1394) dv1394="no"
  ;;
  --disable-network) network="no"; ffserver="no"
  ;;
  --disable-zlib) zlib="no"
  ;;
  --enable-a52) a52="yes"
  ;;
  --enable-a52bin) a52bin="yes"
  ;;
  --enable-dts) dts="yes" ; extralibs="$extralibs -ldts"
  ;;
  --enable-pp) pp="yes"
  ;;
  --enable-shared-pp) shared_pp="yes"
  ;;
  --enable-libgsm) libgsm="yes"
  ;;
  --enable-mp3lame) mp3lame="yes"
  ;;
  --enable-libogg) libogg="yes"
  ;;
  --enable-vorbis) vorbis="yes"
  ;;
  --enable-theora) theora="yes"
  ;;
  --enable-faad) faad="yes"
  ;;
  --enable-faadbin) faadbin="yes"
  ;;
  --enable-faac) faac="yes"
  ;;
  --enable-xvid) xvid="yes"
  ;;
  --enable-x264) x264="yes"; extralibs="$extralibs -lx264"
  ;;
  --enable-dc1394) dc1394="yes"
  ;;
  --disable-vhook) vhook="no"
  ;;
  --disable-simple_idct) simpleidct="no"
  ;;
  --enable-mingw32) mingw32="yes"
  ;;
  --enable-shared) lshared="yes"
  ;;
  --disable-debug) debug="no"
  ;;
  --disable-opts) optimize="no"
  ;;
  --disable-mpegaudio-hp) mpegaudio_hp="no"
  ;;
  --disable-ffserver) ffserver="no"
  ;;
  --disable-ffplay) ffplay="no"
  ;;
  --enable-small) optimize="small"
  ;;
  --enable-amr_nb) amr_nb="yes"
  ;;
  --enable-amr_nb-fixed) amr_nb_fixed="yes"
  ;;
  --enable-amr_wb) amr_wb="yes"
  ;; 
  --enable-amr_if2) amr_if2="yes"
  ;;
  --enable-sunmlib) sunmlib="yes"
  ;;
  --enable-pthreads) pthreads="yes"
  ;;
  --enable-gpl) gpl="yes"
  ;;
  --enable-memalign-hack) memalignhack="yes"
  ;;
  --disable-strip) dostrip="no"
  ;;
  --enable-codec=*) CODEC_LIST="$CODEC_LIST ${opt#--enable-codec=}"
  ;;
  --disable-codec=*) CODEC_LIST="`echo $CODEC_LIST | sed -e \"s#${opt#--disable-codec=}##\"`"
  ;;
  --disable-encoders) CODEC_LIST="`echo $CODEC_LIST | sed 's/[-_a-zA-Z0-9]*encoder//g'`"
  ;;
  --disable-decoders) CODEC_LIST="`echo $CODEC_LIST | sed 's/[-_a-zA-Z0-9]*decoder//g'`"
  ;;
  esac
done

if test "$theora" = "yes" ; then
    if test "$libogg" = "no"; then
        echo "libogg must be enabled to enable Theora"     
        fail="yes"
        theora="no"
    fi
fi

if test "$vorbis" = "yes" ; then
    if test "$libogg" = "no"; then
        echo "libogg must be enabled to enable Vorbis"
        fail="yes"
        vorbis="no"
    fi
fi

if test "$gpl" != "yes"; then
    if test "$pp" != "no" -o "$shared_pp" != "no"; then
        echo "The Postprocessing code is under GPL and --enable-gpl is not specified"
        fail="yes"
    fi

    if test "$a52" != "no" -o "$a52bin" != "no"; then
        echo "liba52 is under GPL and --enable-gpl is not specified"
        fail="yes"
    fi

    if test "$xvid" != "no"; then
        echo "libxvidcore is under GPL and --enable-gpl is not specified"
        fail="yes"
    fi

    if test "$x264" != "no"; then
        echo "x264 is under GPL and --enable-gpl is not specified"
        fail="yes"
    fi

    if test "$dts" != "no"; then
        echo "libdts is under GPL and --enable-gpl is not specified"
        fail="yes"
    fi
    
    if test "$faad" != "no" -o "$faadbin" != "no"; then
        cat > $TMPC << EOF
            #include <faad.h>
            int main( void ) { return 0; }
EOF
    
        if $cc $CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
            cat > $TMPC << EOF
                #include <faad.h>
                #ifndef FAAD2_VERSION
                ok faad1
                #endif
                int main( void ) { return 0; }
EOF
            if $cc $CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
                echo "faad2 is under GPL and --enable-gpl is not specified"
                fail="yes"
            fi
        else
            faad="no"
            faadbin="no"
            echo "faad test failed"
        fi
    fi
   

    if test "$fail" = "yes"; then
        exit 1
    fi
fi

# compute mmx state
if test $mmx = "default"; then
    if test $cpu = "x86" -o $cpu = "x86_64"; then
        mmx="yes"
    else
        mmx="no"
    fi
fi

# check iwmmxt support
if test $iwmmxt = "default" -a $cpu = "armv4l"; then
    cat > $TMPC << EOF
        int main(void) { 
        __asm__ __volatile__ ("wunpckelub wr6, wr4");
        }
EOF

    iwmmxt=no
    if ${cross_prefix}${cc} -o $TMPO $TMPC 2> /dev/null ; then
        iwmmxt=yes
    fi
fi

#Darwin CC versions
needmdynamicnopic="no"
if test $targetos = Darwin; then
    if test -n "`$cc -v 2>&1 | grep xlc`"; then
	CFLAGS="$CFLAGS -qpdf2 -qlanglvl=extc99 -qmaxmem=-1 -qarch=auto -qtune=auto"
    else
	gcc_version="`$cc -v 2>&1 | grep version | cut -d ' ' -f3-`"
	case "$gcc_version" in
	    *2.95*) 
		CFLAGS="$CFLAGS -no-cpp-precomp -pipe -fomit-frame-pointer"
		;;
	    *[34].*)
		CFLAGS="$CFLAGS -no-cpp-precomp -pipe -fomit-frame-pointer -force_cpusubtype_ALL -Wno-sign-compare"
		if test "$lshared" = no; then
		   needmdynamicnopic="yes"
		fi
		;;
	    *)
		CFLAGS="$CFLAGS -no-cpp-precomp -pipe -fomit-frame-pointer"
		if test "$lshared" = no; then
		   needmdynamicnopic="yes"
		fi
		;;
	esac
    fi
fi

# Can only do AltiVec on PowerPC
if test $altivec = "default"; then
    if test $cpu = "powerpc"; then
        altivec="yes"
    else
        altivec="no"
    fi
fi

# Add processor-specific flags
TUNECPU="generic"
POWERPCMODE="32bits"
if test $tune != "generic"; then
    case $tune in
	601|ppc601|PowerPC601)
	    CFLAGS="$CFLAGS -mcpu=601"
	    if test $altivec = "yes"; then
		echo "WARNING: tuning for PPC601 but altivec enabled !";
	    fi
	    TUNECPU=ppc601
	;;
	603*|ppc603*|PowerPC603*)
	    CFLAGS="$CFLAGS -mcpu=603"
	    if test $altivec = "yes"; then
		echo "WARNING: tuning for PPC603 but altivec enabled !";
	    fi
	    TUNECPU=ppc603
	;;
	604*|ppc604*|PowerPC604*)
	    CFLAGS="$CFLAGS -mcpu=604"
	    if test $altivec = "yes"; then
		echo "WARNING: tuning for PPC604 but altivec enabled !";
	    fi
	    TUNECPU=ppc604
	;;
	G3|g3|75*|ppc75*|PowerPC75*)
	    CFLAGS="$CFLAGS -mcpu=750 -mtune=750 -mpowerpc-gfxopt"
	    if test $altivec = "yes"; then
		echo "WARNING: tuning for PPC75x but altivec enabled !";
	    fi
	    TUNECPU=ppc750
	;;
	G4|g4|745*|ppc745*|PowerPC745*)
	    CFLAGS="$CFLAGS -mcpu=7450 -mtune=7450 -mpowerpc-gfxopt"
	    if test $altivec = "no"; then
		echo "WARNING: tuning for PPC745x but altivec disabled !";
	    fi
	    TUNECPU=ppc7450
	;;
	74*|ppc74*|PowerPC74*)
	    CFLAGS="$CFLAGS -mcpu=7400 -mtune=7400 -mpowerpc-gfxopt"
	    if test $altivec = "no"; then
		echo "WARNING: tuning for PPC74xx but altivec disabled !";
	    fi
	    TUNECPU=ppc7400
	;;
	G5|g5|970|ppc970|PowerPC970|power4*|Power4*)
	    CFLAGS="$CFLAGS -mcpu=970 -mtune=970 -mpowerpc-gfxopt -mpowerpc64"
	    if test $altivec = "no"; then
		echo "WARNING: tuning for PPC970 but altivec disabled !";
	    fi
	    TUNECPU=ppc970
            POWERPCMODE="64bits"
	;;
	i[3456]86|pentium|pentiumpro|pentium-mmx|pentium[234]|prescott|k6|k6-[23]|athlon|athlon-tbird|athlon-4|athlon-[mx]p|winchip-c6|winchip2|c3|nocona)
	    CFLAGS="$CFLAGS -march=$tune"
	;;
	*)
	echo "WARNING: unknown CPU \"$tune\", ignored"
	;;
    esac
fi

# AltiVec flags: The FSF version of GCC differs from the Apple version 
if test $cpu = "powerpc"; then
    if test $altivec = "yes"; then
        if test -n "`$cc -v 2>&1 | grep version | grep Apple`"; then
            CFLAGS="$CFLAGS -faltivec"
        else
            CFLAGS="$CFLAGS -maltivec -mabi=altivec"
        fi
    fi
fi

# See if we have <altivec.h>
cat > $TMPC << EOF
#include <altivec.h>
int main( void ) { return 0; }
EOF

_altivec_h="no"
if $cc $CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
_altivec_h="yes"
fi

# See does our compiler support Motorola AltiVec C API
if test $altivec = "yes"; then
if test $_altivec_h = "yes"; then
cat > $TMPC << EOF
#include <altivec.h>
int main(void) {
    vector signed int v1, v2, v3;
    v1 = vec_add(v2,v3);
    return 0;
}
EOF
else
cat > $TMPC << EOF
int main(void) {
    vector signed int v1, v2, v3;
    v1 = vec_add(v2,v3);
    return 0;
}
EOF
fi
$cc $CFLAGS -o $TMPE $TMPC 2> /dev/null || altivec="no"
fi

# Can only do mmi on mips
if test $mmi = "default"; then
    if test $cpu = "mips"; then
        mmi="yes"
    else
        mmi="no"
    fi
fi

# See does our compiler support mmi
if test $mmi = "yes"; then
cat > $TMPC << EOF
int main(void) {
    __asm__ ("lq \$2, 0(\$2)");
    return 0;
}
EOF
$cc -o $TMPE $TMPC 2> /dev/null || mmi="no"
fi

if test "$mingw32" = "yes" ; then
    v4l="no"
    bktr="no"
    audio_oss="no"
    dv1394="no"
    dc1394="no"
    ffserver="no"
    network="no"
    SLIBPREF=""
    SLIBSUF=".dll"
    EXESUF=".exe"
    if test "$force_prefix" != yes; then prefix="/c/Program Files/FFmpeg"; fi
    if test "$force_libdir" != yes; then bindir="$prefix"; fi
fi

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

if test -z "$cross_prefix" ; then

# ---
# big/little endian test
cat > $TMPC << EOF
#include <inttypes.h>
int main(int argc, char ** argv){
	volatile uint32_t i=0x01234567;
	return (*((uint8_t*)(&i))) == 0x67;
}
EOF

if $cc -o $TMPE $TMPC 2>/dev/null ; then
$TMPE && bigendian="yes"
else
echo big/little test failed
fi

else

# if cross compiling, cannot launch a program, so make a static guess
if test "$cpu" = "powerpc" -o "$cpu" = "mips" ; then
    bigendian="yes"
fi

fi

# ---
# *inttypes.h* test
cat > $TMPC << EOF
#include <inttypes.h>
int main(int argc, char ** argv){
    return 0;
}
EOF

$cc -o $TMPE $TMPC 2>/dev/null || inttypes="no"

# ---
# *int_fast* test
cat > $TMPC << EOF
#include <inttypes.h>
int main(int argc, char ** argv){
	volatile uint_fast64_t i=0x01234567;
	return 0;
}
EOF

$cc -o $TMPE $TMPC 2>/dev/null || emu_fast_int="yes"

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

if test "$_memalign" = "no" -a "$mmx" = "yes" -a "$memalignhack" != "yes"; then
    echo "error, no memalign() but sse enabled, either disable it or use --enable-memalign-hack"
    exit 1
fi

cat > $TMPC << EOF
#include <time.h>
int main( void ) { localtime_r(NULL, NULL); }
EOF

localtime_r=no
if $cc -o $TMPE $TMPC 2> /dev/null ; then
  localtime_r=yes
fi

if test "$zlib" = "yes"; then
# check for zlib - mmu_man
cat > $TMPC << EOF
#include <zlib.h>
int main ( void ) {
if (zlibVersion() != ZLIB_VERSION)
   puts("zlib version differs !!!");
   return 1;
return 0;
}
EOF
$cc $CFLAGS $LDFLAGS -o $TMPE $TMPC -lz 2> /dev/null || zlib="no"
# $TMPE 2> /dev/null > /dev/null || zlib="no"
# XXX: more tests needed - runtime test
fi
if test "$zlib" = "yes"; then
extralibs="$extralibs -lz"
fi

# test for lrintf in math.h
cat > $TMPC << EOF
#define _ISOC9X_SOURCE  1
#include <math.h>
int main( void ) { return (lrintf(3.999f) > 0)?0:1; }
EOF

have_lrintf="no"
if $cc $extralibs -o $TMPE $TMPC 2> /dev/null ; then
  have_lrintf="yes"
  # allanc@chickenandporn.com: cannot execute cross-compiled
  # code on the host.  Only execute if not cross-compiling.
  if test -z "$cross_prefix" ; then
    $TMPE 2> /dev/null > /dev/null || have_lrintf="no"
  fi
fi

_restrict=
for restrict_keyword in restrict __restrict__ __restrict; do
  echo "void foo(char * $restrict_keyword p);" > $TMPC
  if $cc -c -o $TMPO $TMPC 2> /dev/null; then
    _restrict=$restrict_keyword
    break;
  fi
done

# test gcc version to see if vector builtins can be used
# currently only used on i386 for MMX builtins
cat > $TMPC << EOF
#include <xmmintrin.h>
int main(void) { 
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)
return 0;
#else
#error no vector builtins
#endif
}
EOF

builtin_vector=no
if $cc -msse -o $TMPO $TMPC 2> /dev/null ; then
  builtin_vector=yes
fi

# dlopen/dlfcn.h probing

cat > $TMPC << EOF
#include <dlfcn.h>
int main( void ) { return (int) dlopen("foo", 0); }
EOF

ldl=-ldl

if $cc -o $TMPE $TMPC -ldl > /dev/null 2>&1 ; then
dlfcn=yes
dlopen=yes
fi

if $cc -o $TMPE $TMPC > /dev/null 2>&1 ; then
dlfcn=yes
dlopen=yes
ldl=""
fi

cat > $TMPC << EOF
int main( void ) { return (int) dlopen("foo", 0); }
EOF

if $cc -o $TMPE $TMPC -ldl > /dev/null 2>&1  ; then
dlopen=yes
fi