configure

#!/bin/sh
#
# FFmpeg configure script
#
# Copyright (c) 2000, 2001, 2002 Fabrice Bellard
# Copyright (c) 2005-2006 Diego Biurrun
# Copyright (c) 2005-2006 Mans Rullgard
#

# make sure we are running under a compatible shell
# try to make this part work with most shells

try_exec(){
    echo "Trying shell $1"
    type "$1" >/dev/null 2>&1 && exec "$@"
}

unset foo
(: ${foo%%bar}) 2>/dev/null
E1="$?"

(: ${foo?}) 2>/dev/null
E2="$?"

if test "$E1" != 0 || test "$E2" = 0; then
    echo "Broken shell detected.  Trying alternatives."
    export FF_CONF_EXEC
    if test "0$FF_CONF_EXEC" -lt 1; then
        FF_CONF_EXEC=1
        try_exec bash "$0" "$@"
    fi
    if test "0$FF_CONF_EXEC" -lt 2; then
        FF_CONF_EXEC=2
        try_exec ksh "$0" "$@"
    fi
    if test "0$FF_CONF_EXEC" -lt 3; then
        FF_CONF_EXEC=3
        try_exec /usr/xpg4/bin/sh "$0" "$@"
    fi
    echo "No compatible shell script interpreter found."
    echo "This configure script requires a POSIX-compatible shell"
    echo "such as bash or ksh."
    echo "THIS IS NOT A BUG IN FFMPEG, DO NOT REPORT IT AS SUCH."
    echo "Instead, install a working POSIX-compatible shell."
    echo "Disabling this configure test will create a broken FFmpeg."
    if test "$BASH_VERSION" = '2.04.0(1)-release'; then
        echo "This bash version ($BASH_VERSION) is broken on your platform."
        echo "Upgrade to a later version if available."
    fi
    exit 1
fi

show_help(){
  echo "Usage: configure [options]"
  echo "Options: [defaults in brackets after descriptions]"
  echo
  echo "Standard options:"
  echo "  --help                   print this message"
  echo "  --log[=FILE|yes|no]      log tests and output to FILE [config.err]"
  echo "  --prefix=PREFIX          install in PREFIX [$PREFIX]"
  echo "  --libdir=DIR             install libs in DIR [PREFIX/lib]"
  echo "  --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]"
  echo "  --incdir=DIR             install includes in DIR [PREFIX/include/ffmpeg]"
  echo "  --mandir=DIR             install man page in DIR [PREFIX/man]"
  echo "  --enable-mp3lame         enable MP3 encoding via libmp3lame [default=no]"
  echo "  --enable-libnut          enable NUT support via libnut [default=no]"
  echo "  --enable-libogg          enable Ogg support via libogg [default=no]"
  echo "  --enable-vorbis          enable Vorbis support via libvorbis [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 MinGW native/cross Windows compile"
  echo "  --enable-mingwce         enable MinGW native/cross WinCE compile"
  echo "  --enable-a52             enable GPLed A52 support [default=no]"
  echo "  --enable-a52bin          open liba52.so.0 at runtime [default=no]"
  echo "  --enable-dts             enable GPLed DTS support [default=no]"
  echo "  --enable-pp              enable GPLed postprocessing support [default=no]"
  echo "  --enable-static          build static libraries [default=yes]"
  echo "  --disable-static         do not build static libraries [default=no]"
  echo "  --enable-shared          build shared libraries [default=no]"
  echo "  --disable-shared         do not build shared libraries [default=yes]"
  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-amr_if2         enable amr_wb IF2 audio codec"
  echo "  --enable-sunmlib         use Sun medialib [default=no]"
  echo "  --enable-pthreads        use pthreads [default=no]"
  echo "  --enable-x11grab         enable X11 grabbing [default=no]"
  echo "  --enable-dc1394          enable IIDC-1394 grabbing using libdc1394"
  echo "                           and libraw1394 [default=no]"
  echo "  --enable-swscaler        software scaler support [default=no]"
  echo "  --enable-avisynth        allow reading AVISynth script files [default=no]"
  echo "  --enable-gpl             allow use of GPL code, the resulting libav*"
  echo "                           and ffmpeg will be under GPL [default=no]"
  echo ""
  echo "Advanced options (experts only):"
  echo "  --source-path=PATH       path to source code [$source_path]"
  echo "  --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]"
  echo "  --cross-compile          assume a cross-compiler is used"
  echo "  --cc=CC                  use C compiler CC [$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 "  --arch=ARCH              select architecture  [$arch]"
  echo "  --cpu=CPU                selects the minimum cpu required (affects
                                   instruction selection, may crash on older CPUs)"
  echo "  --powerpc-perf-enable    enable performance report on PPC"
  echo "                           (requires enabling PMC)"
  echo "  --disable-mmx            disable MMX usage"
  echo "  --disable-armv5te        disable armv5te usage"
  echo "  --disable-iwmmxt         disable iwmmxt usage"
  echo "  --disable-altivec        disable AltiVec usage"
  echo "  --disable-audio-oss      disable OSS audio support [default=no]"
  echo "  --disable-audio-beos     disable BeOS audio support [default=no]"
  echo "  --disable-v4l            disable video4linux grabbing [default=no]"
  echo "  --disable-v4l2           disable video4linux2 grabbing [default=no]"
  echo "  --disable-bktr           disable bktr video grabbing [default=no]"
  echo "  --disable-dv1394         disable DV1394 grabbing [default=no]"
  echo "  --disable-network        disable network support [default=no]"
  echo "  --disable-ipv6           disable ipv6 support [default=no]"
  echo "  --disable-zlib           disable zlib [default=no]"
  echo "  --disable-vhook          disable video hooking support"
  echo "  --enable-gprof           enable profiling with gprof [$gprof]"
  echo "  --disable-debug          disable debugging symbols"
  echo "  --disable-opts           disable compiler optimizations"
  echo "  --enable-extra-warnings  enable more compiler warnings"
  echo "  --disable-mpegaudio-hp   faster (but less accurate)"
  echo "                           MPEG audio decoding [default=no]"
  echo "  --disable-protocols      disable I/O protocols support [default=no]"
  echo "  --disable-ffmpeg         disable ffmpeg build"
  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 "  --disable-encoder=NAME   disables encoder NAME"
  echo "  --enable-encoder=NAME    enables encoder NAME"
  echo "  --disable-decoder=NAME   disables decoder NAME"
  echo "  --enable-decoder=NAME    enables decoder NAME"
  echo "  --disable-encoders       disables all encoders"
  echo "  --disable-decoders       disables all decoders"
  echo "  --disable-muxer=NAME     disables muxer NAME"
  echo "  --enable-muxer=NAME      enables muxer NAME"
  echo "  --disable-muxers         disables all muxers"
  echo "  --disable-demuxer=NAME   disables demuxer NAME"
  echo "  --enable-demuxer=NAME    enables demuxer NAME"
  echo "  --disable-demuxers       disables all demuxers"
  echo "  --enable-parser=NAME     enables parser NAME"
  echo "  --disable-parser=NAME    disables parser NAME"
  echo "  --disable-parsers        disables all parsers"
  echo ""
  echo "NOTE: Object files are built at the place where configure is launched."
  exit 1
}

log(){
    echo "$@" >>$logfile
}

log_file(){
    log BEGIN $1
    cat -n $1 >>$logfile
    log END $1
}

echolog(){
    log "$@"
    echo "$@"
}

die(){
    echolog "$@"
    cat <<EOF
If you think configure made a mistake, make sure you are using the latest
version from SVN.  If the latest version fails, report the problem to the
ffmpeg-devel@mplayerhq.hu mailing list or IRC #ffmpeg on irc.freenode.net.
EOF
    if enabled logging; then
        cat <<EOF
Include the log file "$logfile" produced by configure as this will help
solving the problem.
EOF
    else
cat <<EOF
Rerun configure with logging enabled (do not use --log=no), and include the
log this produces with your report.
EOF
    fi
    rm -f $TMPC $TMPO $TMPE $TMPS $TMPH
    exit 1
}

# "tr '[a-z]' '[A-Z]'" is a workaround for Solaris tr not grokking "tr a-z A-Z"
toupper(){
    echo "$@" | tr '[a-z]' '[A-Z]'
}

set_all(){
    value=$1
    shift
    for var in $*; do
        eval $var=$value
    done
}

enable(){
    set_all yes $*
}

disable(){
    set_all no $*
}

enabled(){
    eval test "x\$$1" = "xyes"
}

enabled_all(){
    for opt; do
        enabled $opt || return 1
    done
}

enabled_any(){
    for opt; do
        enabled $opt && return 0
    done
}

print_config(){
    pfx=$1
    header=$2
    makefile=$3
    shift 3
    for cfg; do
        if enabled $cfg; then
            ucname="${pfx}`toupper $cfg`"
            echo "#define ${ucname} 1" >> $header
            echo "${ucname}=yes" >> $makefile
        fi
    done
}

flags_saved(){
    (: ${SAVE_CFLAGS?}) 2>/dev/null
}

save_flags(){
    flags_saved && return
    SAVE_CFLAGS="$CFLAGS"
    SAVE_LDFLAGS="$LDFLAGS"
    SAVE_extralibs="$extralibs"
}

restore_flags(){
    CFLAGS="$SAVE_CFLAGS"
    LDFLAGS="$SAVE_LDFLAGS"
    extralibs="$SAVE_extralibs"
    unset SAVE_CFLAGS
    unset SAVE_LDFLAGS
    unset SAVE_extralibs
}

temp_cflags(){
    save_flags
    CFLAGS="$CFLAGS $*"
}

temp_ldflags(){
    save_flags
    LDFLAGS="$LDFLAGS $*"
}

temp_extralibs(){
    save_flags
    extralibs="$extralibs $*"
}

append(){
    var=$1
    shift
    flags_saved && eval "SAVE_$var=\"\$SAVE_$var $*\""
    eval "$var=\"\$$var $*\""
}

add_cflags(){
    append CFLAGS "$@"
}

add_ldflags(){
    append LDFLAGS "$@"
}

add_extralibs(){
    append extralibs "$@"
}

check_cmd(){
    log "$@"
    "$@" >>$logfile 2>&1
}

check_cc(){
    log check_cc "$@"
    cat >$TMPC
    log_file $TMPC
    check_cmd $cc $CFLAGS "$@" -c -o $TMPO $TMPC
}

check_cpp(){
    log check_cpp "$@"
    cat >$TMPC
    log_file $TMPC
    check_cmd $cc $CFLAGS "$@" -E -o $TMPO $TMPC
}

check_ld(){
    log check_ld "$@"
    check_cc || return
    check_cmd $cc $LDFLAGS "$@" -o $TMPE $TMPO $extralibs
}

check_cflags(){
    log check_cflags "$@"
    check_cc "$@" <<EOF && add_cflags "$@"
int x;
EOF
}

check_ldflags(){
    log check_ldflags "$@"
    check_ld "$@" <<EOF && add_ldflags "$@"
int main(){
    return 0;
}
EOF
}

check_header(){
    log check_header "$@"
    header=$1
    shift
    check_cpp "$@" <<EOF
#include <$header>
int x;
EOF
    err=$?
    var=`echo $header | sed 's/[^A-Za-z0-9_]/_/g'`
    test "$err" = 0 && enable $var || disable $var
    return $err
}

check_func(){
    log check_func "$@"
    func=$1
    shift
    check_ld "$@" <<EOF
extern int $func();
int main(){
    $func();
}
EOF
    err=$?
    test "$err" = 0 && enable $func || disable $func
    return $err
}

check_lib(){
    log check_lib "$@"
    header="$1"
    func="$2"
    shift 2
    temp_extralibs "$@"
    check_header $header && check_func $func && add_extralibs "$@"
    err=$?
    restore_flags
    return $err
}

check_exec(){
    check_ld "$@" && { test "$cross_compile" = yes || $TMPE >>$logfile 2>&1; }
}

require(){
    name="$1"
    header="$2"
    func="$3"
    shift 3
    check_lib $header $func "$@" || die "ERROR: $name not found"
}

apply(){
    file=$1
    shift
    "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
}

CONFIG_LIST='
    encoders
    decoders
    parsers
    muxers
    demuxers
    a52
    a52bin
    amr
    amr_nb
    amr_nb_fixed
    amr_wb
    audio_beos
    audio_oss
    avisynth
    beos_netserver
    bktr
    dc1394
    dts
    dv1394
    faac
    faad
    faadbin
    ffmpeg
    ffplay
    ffserver
    gpl
    ipv6
    libgsm
    libnut
    libogg
    libvorbis
    memalign_hack
    mp3lame
    mpegaudio_hp
    network
    pp
    protocols
    swscaler
    vhook
    video4linux
    video4linux2
    wince
    x11grab
    x264
    xvid
    zlib
'

HAVE_LIST='
    altivec_h
    beosthreads
    byteswap_h
    dcbzl
    dlfcn_h
    dlopen
    freetype2
    gprof
    imlib2
    inet_aton
    localtime_r
    lrintf
    malloc_h
    memalign
    mlib
    os2
    os2threads
    pthreads
    sdl
    sdl_video_size
    threads
    w32threads
'

# 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
logging="yes"
logfile="config.err"
PREFIX="/usr/local"
libdir='${PREFIX}/lib'
shlibdir="$libdir"
incdir='${PREFIX}/include/ffmpeg'
mandir='${PREFIX}/man'
bindir='${PREFIX}/bin'
cross_prefix=""
cross_compile="no"
cc="gcc"
ar="ar"
ranlib="ranlib"
make="make"
strip="strip"
arch=`uname -m`
cpu="generic"
powerpc_perf="no"
mmx="default"
cmov="no"
cmov_is_fast="no"
armv5te="default"
iwmmxt="default"
altivec="default"
dcbzl="no"
mmi="default"
case "$arch" in
  i386|i486|i586|i686|i86pc|BePC)
    arch="x86_32"
  ;;
  x86_64|amd64)
    arch="x86_32"
    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 $CFLAGS | grep -- -m32`"  ]; then
        arch="x86_64"
      fi
    fi
  ;;
  # armv4l is a subset of armv[567]*l
  arm|armv[4567]*l)
    arch="armv4l"
  ;;
  alpha)
    arch="alpha"
  ;;
  "Power Macintosh"|ppc|ppc64|powerpc)
    arch="powerpc"
  ;;
  mips|mipsel|IP*)
    arch="mips"
  ;;
  sun4u|sparc64)
    arch="sparc64"
  ;;
  sparc)
    arch="sparc"
  ;;
  sh4)
    arch="sh4"
  ;;
  parisc|parisc64)
    arch="parisc"
  ;;
  s390|s390x)
    arch="s390"
  ;;
  m68k)
    arch="m68k"
  ;;
  ia64)
    arch="ia64"
  ;;
  bfin)
    arch="bfin"
  ;;
  *)
    arch="unknown"
  ;;
esac
gprof="no"
video4linux="yes"
video4linux2="yes"
bktr="no"
audio_oss="yes"
audio_beos="no"
x11grab="no"
dv1394="yes"
dc1394="no"
network="yes"
ipv6="yes"
zlib="yes"
libgsm="no"
mp3lame="no"
libnut="no"
libogg="no"
libvorbis="no"
faad="no"
faadbin="no"
faac="no"
xvid="no"
x264="no"
a52="no"
a52bin="no"
dts="no"
pp="no"
mingw32="no"
wince="no"
os2="no"
lstatic="yes"
lshared="no"
optimize="yes"
debug="yes"
extrawarnings="no"
dostrip="yes"
installstrip="-s"
extralibs="-lm"
bigendian="no"
vhook="default"
avisynth="no"
dlfcn_h="no"
dlopen="no"
mpegaudio_hp="yes"
SHFLAGS='-shared -Wl,-soname,$@'
VHOOKSHFLAGS='$(SHFLAGS)'
beos_netserver="no"
protocols="yes"
ffmpeg="yes"
ffserver="yes"
ffplay="yes"
LIBOBJFLAGS=""
FFLDFLAGS=-Wl,--warn-common
LDLATEFLAGS='-Wl,-rpath-link,\$(BUILD_ROOT)/libavcodec -Wl,-rpath-link,\$(BUILD_ROOT)/libavformat -Wl,-rpath-link,\$(BUILD_ROOT)/libavutil'
FFSERVERLDFLAGS=-Wl,-E
LDCONFIG="ldconfig"
LIBPREF="lib"
LIBSUF=".a"
LIB='$(LIBPREF)$(NAME)$(LIBSUF)'
SLIBPREF="lib"
SLIBSUF=".so"
SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
EXESUF=""
BUILDSUF=""
amr_nb="no"
amr_wb="no"
amr_nb_fixed="no"
amr_if2="no"
mlib="no"
pthreads="no"
swscaler="no"
gpl="no"
memalign_hack="no"
asmalign_pot="unknown"
LIB_INSTALL_EXTRA_CMD='$(RANLIB) "$(libdir)/$(LIB)"'

# OS specific
targetos=`uname -s`
case $targetos in
BeOS)
PREFIX="/boot/home/config"
# helps building libavcodec
add_cflags "-DPIC -fomit-frame-pointer"
# 3 gcc releases known for BeOS, each with ugly bugs
gcc_version="`$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"
add_cflags "-fno-expensive-optimizations"
;;
esac
SHFLAGS=-nostart
# disable Linux things
audio_oss="no"
video4linux="no"
video4linux2="no"
dv1394="no"
# enable BeOS things
audio_beos="yes"
beosthreads="yes"
# no need for libm, but the inet stuff
# Check for BONE
if (echo $BEINCLUDES|grep 'headers/be/bone' >/dev/null); then
extralibs="-lbind -lsocket"
else
beos_netserver="yes"
extralibs="-lnet"
fi ;;
SunOS)
video4linux="no"
video4linux2="no"
audio_oss="no"
dv1394="no"
make="gmake"
FFLDFLAGS=""
FFSERVERLDFLAGS=""
SHFLAGS="-shared -Wl,-h,\$@"
add_extralibs "-lsocket -lnsl"
;;
NetBSD)
video4linux="no"
video4linux2="no"
bktr="yes"
audio_oss="yes"
dv1394="no"
make="gmake"
add_extralibs "-lossaudio"
;;
OpenBSD)
video4linux="no"
video4linux2="no"
bktr="yes"
audio_oss="yes"
dv1394="no"
need_memalign="no"
make="gmake"
LIBOBJFLAGS="\$(PIC)"
LDCONFIG="ldconfig -m \$(shlibdir)"
SHFLAGS='-shared'
SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF).$(LIBVERSION)'
SLIBNAME_WITH_VERSION='$(SLIBNAME)'
SLIBNAME_WITH_MAJOR='$(SLIBNAME)'
add_extralibs "-lossaudio"
;;
FreeBSD)
video4linux="no"
video4linux2="no"
bktr="yes"
audio_oss="yes"
dv1394="no"
make="gmake"
need_memalign="no"
add_cflags "-pthread"
;;
GNU/kFreeBSD)
video4linux="no"
video4linux2="no"
bktr="yes"
audio_oss="yes"
dv1394="no"
add_cflags "-pthread"
;;
BSD/OS)
video4linux="no"
video4linux2="no"
bktr="yes"
audio_oss="yes"
dv1394="no"
extralibs="-lpoll -lgnugetopt -lm"
make="gmake"
strip="strip -d"
installstrip=""
;;
Darwin)
cc="cc"
video4linux="no"
video4linux2="no"
audio_oss="no"
dv1394="no"
need_memalign="no"
SHFLAGS="-dynamiclib -Wl,-single_module -Wl,-install_name,\$(shlibdir)/\$(SLIBNAME),-current_version,\$(SPPVERSION),-compatibility_version,\$(SPPVERSION) -read_only_relocs suppress"
VHOOKSHFLAGS='-dynamiclib -Wl,-single_module -flat_namespace -undefined suppress -Wl,-install_name,$(shlibdir)/vhook/$@'
extralibs=""
strip="strip -x"
installstrip=""
FFLDFLAGS="-Wl,-dynamic,-search_paths_first"
SLIBSUF=".dylib"
SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
FFSERVERLDFLAGS=-Wl,-bind_at_load
;;
MINGW32*)
# Note: the rest of the mingw32 config is done afterwards as mingw32
# can be forced on the command line for Linux cross compilation.
mingw32="yes"
;;
CYGWIN*)
targetos=CYGWIN
shlibdir="$bindir"
video4linux="no"
video4linux2="no"
audio_oss="yes"
dv1394="no"
VHOOKSHFLAGS='-shared -L$(BUILD_ROOT)/libavformat -L$(BUILD_ROOT)/libavcodec -L$(BUILD_ROOT)/libavutil'
VHOOKLIBS='-lavformat$(BUILDSUF) -lavcodec$(BUILDSUF) -lavutil$(BUILDSUF) $(EXTRALIBS)'
extralibs=""
EXESUF=".exe"
SLIBPREF="cyg"
SLIBSUF=".dll"
SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
SHFLAGS='-shared -Wl,--out-implib=lib$(NAME).dll.a'
;;
Linux)
LDLATEFLAGS="-Wl,--as-needed $LDLATEFLAGS"
;;
IRIX*)
targetos=IRIX
ranlib="echo ignoring ranlib"
video4linux="no"
video4linux2="no"
audio_oss="no"
make="gmake"
;;
OS/2)
TMPE=$TMPE".exe"
ar="emxomfar -p128"
ranlib="echo ignoring ranlib"
strip="echo ignoring strip"
add_cflags "-Zomf"
FFLDFLAGS="-Zomf -Zstack 16384 -s"
SHFLAGS="-Zdll -Zomf"
FFSERVERLDFLAGS=""
LIBPREF=""
LIBSUF=".lib"
SLIBPREF=""
SLIBSUF=".dll"
EXESUF=".exe"
extralibs=""
pkg_requires=""
video4linux="no"
video4linux2="no"
audio_oss="no"
dv1394="no"
ffserver="no"
vhook="no"
os2="yes"
os2threads="yes"
;;
*)
targetos="${targetos}-UNKNOWN"
;;
esac

# find source path
source_path="`dirname \"$0\"`"
source_path_used="yes"
if test -z "$source_path" -o "$source_path" = "." ; then
    source_path="`pwd`"
    source_path_used="no"
else
    source_path="`cd \"$source_path\"; pwd`"
    echo "$source_path" | grep -q '[[:blank:]]' &&
      die "Out of tree builds are impossible with whitespace in source path."
fi

if test x"$1" = x"-h" -o x"$1" = x"--help" ; then
    show_help
fi

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

ENCODER_LIST=`sed -n 's/^[^#]*ENC.*, *\(.*\)).*/\1_encoder/p' "$source_path/libavcodec/allcodecs.c"`
DECODER_LIST=`sed -n 's/^[^#]*DEC.*, *\(.*\)).*/\1_decoder/p' "$source_path/libavcodec/allcodecs.c"`
PARSER_LIST=`sed -n 's/^[^#]*PARSER.*, *\(.*\)).*/\1_parser/p' "$source_path/libavcodec/allcodecs.c"`
MUXER_LIST=`sed -n 's/^[^#]*_MUX.*, *\(.*\)).*/\1_muxer/p' "$source_path/libavformat/allformats.c"`
DEMUXER_LIST=`sed -n 's/^[^#]*DEMUX.*, *\(.*\)).*/\1_demuxer/p' "$source_path/libavformat/allformats.c"`

enable $ENCODER_LIST $DECODER_LIST $PARSER_LIST $MUXER_LIST $DEMUXER_LIST

for opt do
  optval="${opt#*=}"
  case "$opt" in
  --log)
  ;;
  --log=*) logging="$optval"
  ;;
  --prefix=*) PREFIX="$optval"
  ;;
  --libdir=*) libdir="$optval"
  ;;
  --shlibdir=*) shlibdir="$optval"
  ;;
  --incdir=*) incdir="$optval"
  ;;
  --mandir=*) mandir="$optval"
  ;;
  --source-path=*) source_path="$optval"
  ;;
  --cross-prefix=*) cross_prefix="$optval"
  ;;
  --cross-compile) cross_compile=yes
  ;;
  --cc=*) cc="$optval"
  ;;
  --make=*) make="$optval"
  ;;
  --extra-cflags=*) add_cflags "$optval"
  ;;
  --extra-ldflags=*) add_ldflags "$optval"
  ;;
  --extra-libs=*) add_extralibs "$optval"
  ;;
  --build-suffix=*) BUILDSUF="$optval"
  ;;
  --arch=*) arch="$optval"
  ;;
  --cpu=*) cpu="$optval"
  ;;
  --powerpc-perf-enable) powerpc_perf="yes"
  ;;
  --disable-mmx) mmx="no"
  ;;
  --disable-armv5te) armv5te="no"
  ;;
  --disable-iwmmxt) iwmmxt="no"
  ;;
  --disable-altivec) altivec="no"
  ;;
  --enable-gprof) gprof="yes"
  ;;
  --disable-v4l) video4linux="no"
  ;;
  --disable-v4l2) video4linux2="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-ipv6) ipv6="no";
  ;;
  --disable-zlib) zlib="no"
  ;;
  --enable-a52) a52="yes"
  ;;
  --enable-a52bin) a52bin="yes"
  ;;
  --enable-dts) dts="yes"
  ;;
  --enable-pp) pp="yes"
  ;;
  --enable-libgsm) libgsm="yes"
  ;;
  --enable-mp3lame) mp3lame="yes"
  ;;
  --enable-libnut) libnut="yes"
  ;;
  --enable-libogg) libogg="yes"
    pkg_requires="$pkg_requires ogg >= 1.1"
  ;;
  --enable-vorbis) libvorbis="yes"
    pkg_requires="$pkg_requires vorbis vorbisenc"
  ;;
  --enable-faad) faad="yes"
  ;;
  --enable-faadbin) faadbin="yes"
  ;;
  --enable-faac) faac="yes"
  ;;
  --enable-xvid) xvid="yes"
  ;;
  --enable-x264) x264="yes"
  ;;
  --enable-avisynth) avisynth="yes";
  ;;
  --enable-x11grab) x11grab="yes";
  ;;
  --enable-dc1394) dc1394="yes"
    pkg_requires="$pkg_requires libraw1394"
  ;;
  --disable-vhook) vhook="no"
  ;;
  --enable-mingw32) mingw32="yes"
  ;;
  --enable-mingwce) wince="yes"
  ;;
  --enable-static) lstatic="yes"
  ;;
  --disable-static) lstatic="no"
  ;;
  --enable-shared) lshared="yes"
  ;;
  --disable-shared) lshared="no"
  ;;
  --disable-debug) debug="no"
  ;;
  --disable-opts) optimize="no"
  ;;
  --enable-extra-warnings) extrawarnings="yes"
  ;;
  --disable-mpegaudio-hp) mpegaudio_hp="no"
  ;;
  --disable-protocols) protocols="no"; network="no"; ffserver="no"
  ;;
  --disable-ffmpeg) ffmpeg="no"
  ;;
  --disable-ffserver) ffserver="no"
  ;;
  --disable-ffplay) ffplay="no"
  ;;
  --enable-small) optimize="small"
  ;;
  --enable-amr_nb) amr="yes"; amr_nb="yes"; amr_nb_fixed="no"
  ;;
  --enable-amr_nb-fixed) amr="yes"; amr_nb_fixed="yes"; amr_nb="no"
  ;;
  --enable-amr_wb) amr="yes"; amr_wb="yes"
  ;;
  --enable-amr_if2) amr="yes"; amr_if2="yes"
  ;;
  --enable-sunmlib) mlib="yes"
  ;;
  --enable-pthreads) pthreads="yes"
  ;;
  --enable-swscaler) swscaler="yes"
  ;;
  --enable-gpl) gpl="yes"
  ;;
  --enable-memalign-hack) memalign_hack="yes"
  ;;
  --disable-strip) dostrip="no"
  ;;
  --enable-encoder=*) enable ${optval}_encoder
  ;;
  --enable-decoder=*) enable ${optval}_decoder
  ;;
  --disable-encoder=*) disable ${optval}_encoder
  ;;
  --disable-decoder=*) disable ${optval}_decoder
  ;;
  --disable-encoders) disable $ENCODER_LIST
  ;;
  --disable-decoders) disable $DECODER_LIST
  ;;
  --enable-muxer=*) enable ${optval}_muxer
  ;;
  --disable-muxer=*) disable ${optval}_muxer
  ;;
  --disable-muxers) disable $MUXER_LIST; ffserver="no"
  ;;
  --enable-demuxer=*) enable ${optval}_demuxer
  ;;
  --disable-demuxer=*) disable ${optval}_demuxer
  ;;
  --disable-demuxers) disable $DEMUXER_LIST
  ;;
  --enable-parser=*) enable ${optval}_parser
  ;;
  --disable-parser=*) disable ${optval}_parser
  ;;
  --disable-parsers) disable $PARSER_LIST
  ;;
  --help) show_help
  ;;
  *)
  echo "Unknown option \"$opt\"."
  echo "See $0 --help for available options."
  exit 1
  ;;
  esac
done

if test "$logging" != no; then
    test "$logging" = yes || logfile="$logging"
    echo "# $0 $@" >$logfile
    set >>$logfile
else
    logfile=/dev/null
fi

if test "$mingw32" = "yes" -o "$wince" = "yes"; then
    if test "$lshared" = "yes" && test "$lstatic" = "yes" ; then
        cat <<EOF
You can only build one library type at once on MinGW.
Specify --disable-static --enable-shared to only build
the shared libraries. To build only the static libraries
you do not need to pass additional options.
EOF
        exit 1
    fi
    video4linux="no"
    video4linux2="no"
    bktr="no"
    audio_oss="no"
    dv1394="no"
    dc1394="no"
    ffserver="no"
    network="no"
    if enabled mingw32; then
        w32threads="yes"
    fi
    if test "$wince" = "yes"; then
        protocols="no"
    fi
    SLIBPREF=""
    SLIBSUF=".dll"
    EXESUF=".exe"
    SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
    SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
    SLIB_EXTRA_CMD="-lib /machine:i386 /def:\$(@:${SLIBSUF}=.def)"
    SHFLAGS="-shared -Wl,--output-def,\$(@:${SLIBSUF}=.def),--out-implib,lib\$(SLIBNAME:\$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc"
fi

# Combine FFLDFLAGS and the LDFLAGS environment variable.
LDFLAGS="$FFLDFLAGS $LDFLAGS"

test -n "$cross_prefix" && cross_compile=yes
cc="${cross_prefix}${cc}"
ar="${cross_prefix}${ar}"
ranlib="${cross_prefix}${ranlib}"
strip="${cross_prefix}${strip}"

# we need to build at least one lib type
if test "$lstatic" = "no" && test "$lshared" = "no" ; then
    cat <<EOF
At least one library type must be built.
Specify --enable-static to build the static libraries or --enable-shared to
build the shared libraries as well. To only build the shared libraries specify
--disable-static in addition to --enable-shared.
EOF
    exit 1;
fi

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

if test "$gpl" != "yes"; then
    if test "$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
        if check_header faad.h; then
            check_cc << EOF
                #include <faad.h>
                #ifndef FAAD2_VERSION
                ok faad1
                #endif
                int main( void ) { return 0; }
EOF
            if test $? = 0 ; 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 "$x11grab" != "no"; then
        echo "The X11 grabber is under GPL and --enable-gpl is not specified."
        fail="yes"
    fi
fi

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

# compute MMX state
if test $mmx = "default"; then
    if test $arch = "x86_32" -o $arch = "x86_64"; then
        mmx="yes"
    else
        mmx="no"
    fi
fi

test -z "$need_memalign" && need_memalign="$mmx"

#Darwin CC versions
needmdynamicnopic="no"
if test $targetos = Darwin; then
    if test -n "`$cc -v 2>&1 | grep xlc`"; then
        add_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*)
                add_cflags "-no-cpp-precomp -pipe"
                ;;
            *[34].*)
                add_cflags "-no-cpp-precomp -pipe -force_cpusubtype_ALL -Wno-sign-compare"
                if test "$lshared" = no; then
                   needmdynamicnopic="yes"
                fi
                ;;
            *)
                add_cflags "-no-cpp-precomp -pipe"
                if test "$lshared" = no; then
                   needmdynamicnopic="yes"
                fi
                ;;
        esac
    fi
fi

if test $optimize != "no"; then
    add_cflags "-fomit-frame-pointer"
fi

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

# Add processor-specific flags
POWERPCMODE="32bits"
if test $cpu != "generic"; then
    case $cpu in
        601|ppc601|PowerPC601)
            add_cflags "-mcpu=601"
            if test $altivec = "yes"; then
                echo "WARNING: Tuning for PPC601 but AltiVec enabled!";
            fi
        ;;
        603*|ppc603*|PowerPC603*)
            add_cflags "-mcpu=603"
            if test $altivec = "yes"; then
                echo "WARNING: Tuning for PPC603 but AltiVec enabled!";
            fi
        ;;
        604*|ppc604*|PowerPC604*)
            add_cflags "-mcpu=604"
            if test $altivec = "yes"; then
                echo "WARNING: Tuning for PPC604 but AltiVec enabled!";
            fi
        ;;
        G3|g3|75*|ppc75*|PowerPC75*)
            add_cflags "-mcpu=750 -mpowerpc-gfxopt"
            if test $altivec = "yes"; then
                echo "WARNING: Tuning for PPC75x but AltiVec enabled!";
            fi
        ;;
        G4|g4|745*|ppc745*|PowerPC745*)
            add_cflags "-mcpu=7450 -mpowerpc-gfxopt"
            if test $altivec = "no"; then
                echo "WARNING: Tuning for PPC745x but AltiVec disabled!";
            fi
        ;;
        74*|ppc74*|PowerPC74*)
            add_cflags "-mcpu=7400 -mpowerpc-gfxopt"
            if test $altivec = "no"; then
                echo "WARNING: Tuning for PPC74xx but AltiVec disabled!";
            fi
        ;;
        G5|g5|970|ppc970|PowerPC970|power4*|Power4*)
            add_cflags "-mcpu=970 -mpowerpc-gfxopt -mpowerpc64"
            if test $altivec = "no"; then
                echo "WARNING: Tuning for PPC970 but AltiVec disabled!";
            fi
            POWERPCMODE="64bits"
        ;;
        # targets that do NOT support conditional mov (cmov)
        i[345]86|pentium|pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
            add_cflags "-march=$cpu"
            cmov="no"
        ;;
        # targets that do support conditional mov (cmov)
        i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64|k8|opteron|athlon-fx)
            add_cflags "-march=$cpu"
            cmov="yes"
            cmov_is_fast="yes"
        ;;
        # targets that do support conditional mov but on which it's slow
        pentium4|prescott|nocona)
            add_cflags "-march=$cpu"
            cmov="yes"
            cmov_is_fast="no"
        ;;
        sparc64)
            add_cflags "-mcpu=v9"
        ;;
        *)
        echo "WARNING: Unknown CPU \"$cpu\", ignored."
        ;;
    esac
fi

# make sure we can execute files in $TMPDIR
cat >$TMPE 2>>$logfile <<EOF
#! /bin/sh
EOF
chmod +x $TMPE >>$logfile 2>&1
if ! $TMPE >>$logfile 2>&1; then
    cat <<EOF
Unable to create and execute files in $TMPDIR1.  Set the TMPDIR environment
variable to another directory and make sure that $TMPDIR1 is not mounted
noexec.
EOF
    die "Sanity test failed."
fi
rm $TMPE

# compiler sanity check
check_exec <<EOF
int main(){
    return 0;
}
EOF
if test "$?" != 0; then
    echo "$cc is unable to create an executable file."
    if test -z "$cross_prefix" -a "$cross_compile" = no; then
        echo "If $cc is a cross-compiler, use the --cross-compile option."
        echo "Only do this if you know what cross compiling means."
    fi
    die "C compiler test failed."
fi

# check for assembler specific support

if test $arch = "powerpc"; then
check_cc <<EOF && dcbzl=yes
int main(void) {
    register long zero = 0;
    char data[1024];
    asm volatile("dcbzl %0, %1" : : "b" (data), "r" (zero));
return 0;
}
EOF
fi

# check for SIMD availability

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

check_header altivec.h

# check if our compiler supports Motorola AltiVec C API
if test $altivec = "yes"; then
    if test $altivec_h = "yes"; then
        inc_altivec_h="#include <altivec.h>"
    else
        inc_altivec_h=
    fi
    check_cc <<EOF || altivec=no
$inc_altivec_h
int main(void) {
    vector signed int v1, v2, v3;
    v1 = vec_add(v2,v3);
    return 0;
}
EOF
fi

# check armv5te instructions support
if test $armv5te = "default" -a $arch = "armv4l"; then
    armv5te=no
    check_cc <<EOF && armv5te=yes
        int main(void) {
        __asm__ __volatile__ ("qadd r0, r0, r0");
        }
EOF
fi

# check iwmmxt support
if test $iwmmxt = "default" -a $arch = "armv4l"; then
    iwmmxt=no
    check_cc <<EOF && iwmmxt=yes
        int main(void) {
        __asm__ __volatile__ ("wunpckelub wr6, wr4");
        }
EOF
fi

# mmi only available on mips
if test $mmi = "default"; then
    if test $arch = "mips"; then
        mmi="yes"
    else
        mmi="no"
    fi
fi

# check if our compiler supports mmi
enabled mmi && check_cc <<EOF || mmi="no"
int main(void) {
    __asm__ ("lq \$2, 0(\$2)");
    return 0;
}
EOF

# ---
# big/little-endian test
if test "$cross_compile" = "no"; then
    check_ld <<EOF || die "endian test failed" && $TMPE && bigendian="yes"
#include <inttypes.h>
int main(int argc, char ** argv){
        volatile uint32_t i=0x01234567;
        return (*((uint8_t*)(&i))) == 0x67;
}
EOF
else
    # programs cannot be launched if cross compiling, so make a static guess
    if test "$arch" = "powerpc" -o "$arch" = "mips" ; then
        bigendian="yes"
    fi
fi

# ---
# check availability of some header files

check_header malloc.h
check_func memalign

if test "$memalign" = "no" -a "$need_memalign" = "yes" -a \
        "$memalign_hack" != "yes"; then
    die "Error, no memalign() but SSE enabled, disable it or use --enable-memalign-hack."
fi

check_header byteswap.h

check_func inet_aton
check_func localtime_r
enabled zlib && check_lib zlib.h zlibVersion -lz || zlib="no"

# check for some common methods of building with pthread support
# do this before the optional library checks as some of them require pthreads
if enabled pthreads; then
    if check_func pthread_create; then
        :
    elif check_func pthread_create -pthread; then
        add_cflags -pthread
        add_ldflags -pthread
    elif check_func pthread_create -pthreads; then
        add_cflags -pthreads
        add_ldflags -pthreads
    elif ! check_lib pthread.h pthread_create -lpthread; then
        die "ERROR: can't find pthreads library"
    fi
fi

# these are off by default, so fail if requested and not available
enabled dts     && require libdts dts.h dts_init -ldts -lm
enabled libgsm  && require libgsm gsm.h gsm_create -lgsm
enabled mp3lame && require LAME lame/lame.h lame_init -lmp3lame -lm
enabled libvorbis && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbis -lvorbisenc -logg
enabled libogg  && require libogg ogg/ogg.h ogg_sync_init -logg
enabled libnut  && require libnut libnut.h nut_demuxer_init -lnut
enabled xvid    && require XviD xvid.h xvid_global -lxvidcore
enabled x264    && require x264 x264.h x264_encoder_open -lx264
enabled dc1394  && require libdc1394 libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394
enabled mlib    && require mediaLib mlib_types.h mlib_VectorSub_S16_U8_Mod -lmlib

# Ugh, faac uses stdcall calling convention on win32 so we can't use
# the generic test functions
if enabled faac; then
    save_flags
    temp_extralibs -lfaac
    check_ld <<EOF && add_extralibs -lfaac || die "ERROR: libfaac not found"
#include <stdint.h>
#include <faac.h>
int main(){
    char *id, *cpr;
    faacEncGetVersion(&id, &cpr);
    return 0;
}
EOF
    restore_flags
fi

# Ugh, recent faad2 versions have renamed all functions and #define the
# old names in faad.h.  Generic tests won't work.
if enabled faad; then
    save_flags
    temp_extralibs -lfaad
    check_ld <<EOF && add_extralibs -lfaad || die "ERROR: libfaad not found"
#include <faad.h>
int main(){
    faacDecOpen();
    return 0;
}
EOF
    restore_flags
fi

# Ugh, avisynth uses WINAPI calls. Generic tests won't work.
if enabled avisynth; then
    save_flags
    temp_extralibs -lvfw32
    check_ld <<EOF && add_extralibs -lvfw32 || die "ERROR: vfw32 not found"
#include <windows.h>
#include <vfw.h>
int main(){
    AVIFileInit();
    return 0;
}
EOF
    restore_flags
fi


# test for lrintf in math.h
check_exec <<EOF && lrintf=yes || lrintf=no
#define _ISOC9X_SOURCE  1
#include <math.h>
int main( void ) { return (lrintf(3.999f) > 0)?0:1; }
EOF

_restrict=
for restrict_keyword in restrict __restrict__ __restrict; do
    check_cc <<EOF && _restrict=$restrict_keyword && break
void foo(char * $restrict_keyword p);
EOF
done

# dlopen/dlfcn.h probing

check_header dlfcn.h

if check_func dlopen; then
    ldl=
elif check_func dlopen -ldl; then
    ldl=-ldl
fi

if test "$vhook" = "default"; then
    vhook="$dlopen"
fi

if enabled_any vhook a52bin faadbin; then
    add_extralibs $ldl
fi

if test "$targetos" = "CYGWIN" -a "$lstatic" = "yes" ; then
    vhook="no"
    echo
    echo "At the moment vhooks don't work on Cygwin static builds."
    echo "Patches welcome."
    echo
fi

if enabled vhook; then
    check_ldflags -rdynamic
    check_ldflags -export-dynamic
fi

if enabled audio_beos; then
    add_extralibs "-lmedia -lbe"
fi

##########################################
# imlib check

temp_extralibs -lImlib2
check_ld <<EOF && imlib2=yes || imlib2=no
#include <X11/Xlib.h>
#include <Imlib2.h>
int main( void ) { return (int) imlib_load_font("foo"); }
EOF
restore_flags

##########################################
# FreeType check

freetype2=no
if test "x$targetos" != "xBeOS"; then
  if (freetype-config --version) >/dev/null 2>&1 ; then
      temp_cflags `freetype-config --cflags`
      temp_extralibs `freetype-config --libs`
      check_ld <<EOF && freetype2=yes
#include <ft2build.h>
int main( void ) { return (int) FT_Init_FreeType(0); }
EOF
      restore_flags
  fi
fi

##########################################
# SDL check

sdl_too_old=no
sdl=no
SDL_CONFIG="${cross_prefix}sdl-config"
if ("${SDL_CONFIG}" --version) >/dev/null 2>&1 ; then
    temp_cflags `"${SDL_CONFIG}" --cflags`
    temp_extralibs `"${SDL_CONFIG}" --libs`
    check_ld <<EOF
#include <SDL.h>
#undef main /* We don't want SDL to override our main() */
int main( void ) { return SDL_Init (SDL_INIT_VIDEO); }
EOF
    if test $? = 0; then
        _sdlversion=`"${SDL_CONFIG}" --version | sed 's/[^0-9]//g'`
        if test "$_sdlversion" -lt 121 ; then
            sdl_too_old=yes
        else
            sdl=yes
            check_cc <<EOF && sdl_video_size=yes || sdl_video_size=no
#include <SDL.h>
int main(void){
    const SDL_VideoInfo *vi = SDL_GetVideoInfo();
    int w = vi->current_w;
    return 0;
}
EOF
        fi
    fi
    restore_flags
fi

enabled sdl || ffplay=no

##########################################
# texi2html check

texi2html=no
if (texi2html -version) >/dev/null 2>&1; then
texi2html=yes
fi

##########################################
# IPv6 check

enabled network && enabled ipv6 && check_ld <<EOF && ipv6=yes || ipv6=no
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
int main( void ) {
  struct sockaddr_storage saddr;
  struct ipv6_mreq mreq6;
  getaddrinfo(0,0,0,0);
  getnameinfo(0,0,0,0,0,0,0);
  IN6_IS_ADDR_MULTICAST((const struct in6_addr *)0);
}
EOF

# check for video4linux2 --- V4L2_PIX_FMT_YUV420
enabled video4linux2 && check_cc <<EOF || video4linux2="no"
#include <sys/time.h>
#include <asm/types.h>
#include <linux/videodev2.h>
int dummy = V4L2_PIX_FMT_YUV420;
struct v4l2_buffer dummy1;
EOF

# Deal with the x11 frame grabber
enabled x11grab                         &&
enabled gpl                             &&
enabled x11_grab_device_demuxer         &&
check_header X11/Xlib.h                 &&
check_header X11/extensions/XShm.h      &&
check_func XOpenDisplay -lX11           &&
check_func XShmCreateImage -lX11 -lXext &&
add_extralibs -lX11 -lXext              ||
disable x11_grab_device_demuxer

enabled debug && add_cflags -g

# add some useful compiler flags if supported
check_cflags -Wdeclaration-after-statement
check_cflags -Wall
check_cflags -Wno-switch
check_cflags -Wdisabled-optimization
check_cflags -Wpointer-arith
check_cflags -Wredundant-decls
enabled extrawarnings && check_cflags -Winline

# add some linker flags
check_ldflags $LDLATEFLAGS

# not all compilers support -Os
test "$optimize" = "small" && check_cflags -Os

if enabled optimize; then
    if test -n "`$cc -v 2>&1 | grep xlc`"; then
        add_cflags  "-O5"
        add_ldflags "-O5"
    else
        add_cflags "-O3"
    fi
fi

# PIC flags for shared library objects where they are needed
if test "$lshared" = "yes" ; then
    # LIBOBJFLAGS may have already been set in the OS configuration
    if test -z "$LIBOBJFLAGS" ; then
        case "$arch" in
            x86_64|ia64|alpha|sparc*) LIBOBJFLAGS="\$(PIC)" ;;
        esac
    fi
fi

if test "$gprof" = "yes" ; then
    add_cflags  "-p"
    add_ldflags "-p"
fi

VHOOKCFLAGS="-fPIC $CFLAGS"
test "$needmdynamicnopic" = yes && add_cflags -mdynamic-no-pic

# find if .align arg is power-of-two or not
if test $asmalign_pot = "unknown"; then
    asmalign_pot="no"
    echo 'asm (".align 3");' | check_cc && asmalign_pot="yes"
fi

echo "install prefix   $PREFIX"
echo "source path      $source_path"
echo "C compiler       $cc"
echo "make             $make"
echo "ARCH             $arch ($cpu)"
if test "$BUILDSUF" != ""; then
    echo "build suffix     $BUILDSUF"
fi
echo "big-endian       $bigendian"
if test $arch = "x86_32" -o $arch = "x86_64"; then
    echo "MMX enabled      $mmx"
    echo "CMOV enabled     $cmov"
    echo "CMOV is fast     $cmov_is_fast"
fi
if test $arch = "armv4l"; then
    echo "ARMv5TE enabled  $armv5te"
    echo "IWMMXT enabled   $iwmmxt"
fi
if test $arch = "mips"; then
    echo "MMI enabled      $mmi"
fi
if test $arch = "powerpc"; then
    echo "AltiVec enabled  $altivec"
    echo "dcbzl available  $dcbzl"
fi
echo "gprof enabled    $gprof"
echo "zlib enabled     $zlib"
echo "libgsm enabled   $libgsm"
echo "mp3lame enabled  $mp3lame"
echo "libnut enabled   $libnut"
echo "libogg enabled   $libogg"
echo "Vorbis enabled   $libvorbis"
echo "FAAD enabled     $faad"
echo "faadbin enabled  $faadbin"
echo "FAAC enabled     $faac"
echo "XviD enabled     $xvid"
echo "x264 enabled     $x264"
echo "a52 support      $a52"
echo "a52 dlopened     $a52bin"
echo "DTS support      $dts"
echo "pp support       $pp"
echo "Software Scaler enabled $swscaler"
echo "AVISynth enabled $avisynth"
echo "debug symbols    $debug"
echo "strip symbols    $dostrip"
echo "optimize         $optimize"
echo "static           $lstatic"
echo "shared           $lshared"
echo "video hooking    $vhook"
echo "SDL support      $sdl"
if test $sdl_too_old = "yes"; then
    echo "-> Your SDL version is too old - please upgrade to have FFplay/SDL support."
fi

if test "$vhook" = "yes"; then
    echo "Imlib2 support   $imlib2"
    echo "FreeType support $freetype2"
fi
echo "Sun medialib support"  $mlib
echo "pthreads support"      $pthreads
echo "AMR-NB float support"  $amr_nb
echo "AMR-NB fixed support"  $amr_nb_fixed
echo "AMR-WB float support"  $amr_wb
echo "AMR-WB IF2 support"    $amr_if2
echo "network support      $network"
if test "$network" = "yes" ; then
    echo "IPv6 support         $ipv6"
fi
echo ".align is power-of-two" $asmalign_pot
if test "$gpl" = "no" ; then
    echo "License: LGPL"
else
    echo "License: GPL"
fi

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! */" > $TMPH
echo "#define FFMPEG_CONFIGURATION "'"'"$FFMPEG_CONFIGURATION"'"' >> $TMPH

echo "PREFIX=$PREFIX" >> config.mak
echo "prefix=\$(DESTDIR)\${PREFIX}" >> config.mak
echo "libdir=\$(DESTDIR)$libdir" >> config.mak
echo "shlibdir=\$(DESTDIR)$shlibdir" >> config.mak
echo "incdir=\$(DESTDIR)$incdir" >> config.mak
echo "bindir=\$(DESTDIR)$bindir" >> config.mak
echo "mandir=\$(DESTDIR)$mandir" >> config.mak
echo "MAKE=$make" >> config.mak
echo "CC=$cc" >> config.mak
echo "AR=$ar" >> config.mak
echo "RANLIB=$ranlib" >> config.mak
if test "$dostrip" = "yes" ; then
    echo "STRIP=$strip" >> config.mak
    echo "INSTALLSTRIP=$installstrip" >> config.mak
else
    echo "STRIP=echo ignoring strip" >> config.mak
    echo "INSTALLSTRIP=" >> config.mak
fi

echo "OPTFLAGS=$CFLAGS" >> config.mak
echo "VHOOKCFLAGS=$VHOOKCFLAGS">>config.mak
echo "LDFLAGS=$LDFLAGS" >> config.mak
echo "LDCONFIG=$LDCONFIG" >> config.mak
echo "FFSERVERLDFLAGS=$FFSERVERLDFLAGS" >> config.mak
echo "SHFLAGS=$SHFLAGS" >> config.mak
echo "VHOOKSHFLAGS=$VHOOKSHFLAGS" >> config.mak
echo "VHOOKLIBS=$VHOOKLIBS" >> config.mak
echo "LIBOBJFLAGS=$LIBOBJFLAGS" >> config.mak
echo "BUILD_STATIC=$lstatic" >> config.mak
echo "BUILDSUF=$BUILDSUF" >> config.mak
echo "LIBPREF=$LIBPREF" >> config.mak
echo "LIBSUF=\${BUILDSUF}$LIBSUF" >> config.mak
if test "$lstatic" = "yes" ; then
  echo "LIB=$LIB" >> config.mak
else # Some Make complain if this variable does not exist.
  echo "LIB=" >> config.mak
fi
echo "SLIBPREF=$SLIBPREF" >> config.mak
echo "SLIBSUF=\${BUILDSUF}$SLIBSUF" >> config.mak
echo "EXESUF=\${BUILDSUF}$EXESUF" >> config.mak
echo "TARGET_OS=$targetos" >> config.mak

ucarch=`toupper $arch`
echo "TARGET_ARCH_${ucarch}=yes" >> config.mak
echo "#define ARCH_${ucarch} 1" >> $TMPH

# special cases
case "$arch" in
    x86_32|x86_64)
        echo "TARGET_ARCH_X86=yes" >> config.mak
        echo "#define ARCH_X86 1" >> $TMPH
        ;;
    powerpc)
        if test "$POWERPCMODE" = "64bits"; then
            echo "#define POWERPC_MODE_64BITS 1" >> $TMPH
        fi
        if test "$powerpc_perf" = "yes"; then
            echo "#define POWERPC_PERFORMANCE_REPORT 1" >> $TMPH
        fi
        ;;
    sparc64)
        echo "TARGET_ARCH_SPARC=yes" >> config.mak
        echo "#define ARCH_SPARC 1" >> $TMPH
        ;;
esac

if test "$bigendian" = "yes" ; then
  echo "WORDS_BIGENDIAN=yes" >> config.mak
  echo "#define WORDS_BIGENDIAN 1" >> $TMPH
fi
if test "$mmx" = "yes" ; then
  echo "TARGET_MMX=yes" >> config.mak
  echo "#define HAVE_MMX 1" >> $TMPH
  echo "#define __CPU__ 586" >> $TMPH
fi
if test "$cmov" = "yes" ; then
  echo "TARGET_CMOV=yes" >> config.mak
  echo "#define HAVE_CMOV 1" >> $TMPH
fi
if test "$cmov_is_fast" = "yes" ; then
  echo "TARGET_CMOV_IS_FAST=yes" >> config.mak
  echo "#define CMOV_IS_FAST 1" >> $TMPH
fi
if test "$armv5te" = "yes" ; then
  echo "TARGET_ARMV5TE=yes" >> config.mak
  echo "#define HAVE_ARMV5TE 1" >> $TMPH
fi
if test "$iwmmxt" = "yes" ; then
  echo "TARGET_IWMMXT=yes" >> config.mak
  echo "#define HAVE_IWMMXT 1" >> $TMPH
fi
if test "$mmi" = "yes" ; then
  echo "TARGET_MMI=yes" >> config.mak
  echo "#define HAVE_MMI 1" >> $TMPH
fi

if test "$altivec" = "yes" ; then
  echo "TARGET_ALTIVEC=yes" >> config.mak
  echo "#define HAVE_ALTIVEC 1" >> $TMPH
fi

if test "$sdl" = "yes" ; then
  echo "SDL_LIBS=`"${SDL_CONFIG}" --libs`" >> config.mak
  echo "SDL_CFLAGS=`"${SDL_CONFIG}" --cflags`" >> config.mak
fi
if test "$texi2html" = "yes"; then
  echo "BUILD_DOC=yes" >> config.mak
fi

sws_version=`grep '#define LIBSWSCALE_VERSION ' "$source_path/libswscale/swscale.h" | sed 's/[^0-9\.]//g'`
pp_version=`grep '#define LIBPOSTPROC_VERSION ' "$source_path/libpostproc/postprocess.h" | sed 's/[^0-9\.]//g'`
lavc_version=`grep '#define LIBAVCODEC_VERSION ' "$source_path/libavcodec/avcodec.h" | sed 's/[^0-9\.]//g'`
lavf_version=`grep '#define LIBAVFORMAT_VERSION ' "$source_path/libavformat/avformat.h" | sed 's/[^0-9\.]//g'`
lavu_version=`grep '#define LIBAVUTIL_VERSION ' "$source_path/libavutil/avutil.h" | sed 's/[^0-9\.]//g'`



if test "$lshared" = "yes" ; then
  echo "BUILD_SHARED=yes" >> config.mak
  echo "PIC=-fPIC -DPIC" >> config.mak
  echo "SPPMAJOR=${pp_version%%.*}" >> config.mak
  echo "SPPVERSION=$pp_version" >> config.mak
  echo "LAVCMAJOR=${lavc_version%%.*}" >> config.mak
  echo "LAVCVERSION=$lavc_version" >> config.mak
  echo "LAVFMAJOR=${lavf_version%%.*}" >> config.mak
  echo "LAVFVERSION=$lavf_version" >> config.mak
  echo "LAVUMAJOR=${lavu_version%%.*}" >> config.mak
  echo "LAVUVERSION=$lavu_version" >> config.mak
  echo "SWSMAJOR=${sws_version%%.*}" >> config.mak
  echo "SWSVERSION=$sws_version" >> config.mak
  echo "SLIBNAME=${SLIBNAME}" >> config.mak
  echo "SLIBNAME_WITH_VERSION=${SLIBNAME_WITH_VERSION}" >> config.mak
  echo "SLIBNAME_WITH_MAJOR=${SLIBNAME_WITH_MAJOR}" >> config.mak
  echo "SLIB_EXTRA_CMD=${SLIB_EXTRA_CMD}" >> config.mak
fi
echo "LIB_INSTALL_EXTRA_CMD=${LIB_INSTALL_EXTRA_CMD}" >> config.mak
echo "EXTRALIBS=$extralibs" >> config.mak

enabled_any $ENCODER_LIST && enable encoders
enabled_any $DECODER_LIST && enable decoders
enabled_any $MUXER_LIST   && enable muxers
enabled_any $DEMUXER_LIST && enable demuxers

enabled_any pthreads beosthreads os2threads w32threads && enable threads

print_config HAVE_   $TMPH config.mak $HAVE_LIST
print_config CONFIG_ $TMPH config.mak $CONFIG_LIST

if test "$targetos" = "Darwin"; then
  echo "#define CONFIG_DARWIN 1"  >> $TMPH
fi

echo "#define restrict $_restrict" >> $TMPH

if test "$optimize" = "small"; then
  echo "#define always_inline"  >> $TMPH
  echo "#define CONFIG_SMALL 1" >> $TMPH
fi

echo "SRC_PATH=\"$source_path\"" >> config.mak
echo "SRC_PATH_BARE=$source_path" >> config.mak
echo "BUILD_ROOT=\"$PWD\"" >> config.mak

if test "$amr_if2" = "yes" ; then
  echo "AMR_CFLAGS=-DIF2=1" >> config.mak
fi

# Apparently it's not possible to portably echo a backslash.
if test "$asmalign_pot" = "yes" ; then
  printf '#define ASMALIGN(ZEROBITS) ".align " #ZEROBITS "\\n\\t"\n' >> $TMPH
else
  printf '#define ASMALIGN(ZEROBITS) ".align 1<<" #ZEROBITS "\\n\\t"\n' >> $TMPH
fi


for codec in $DECODER_LIST $ENCODER_LIST $PARSER_LIST $DEMUXER_LIST $MUXER_LIST; do
    ucname="`toupper $codec`"
    config_name="CONFIG_$ucname"
    enabled_name="ENABLE_$ucname"
    if enabled $codec; then
        echo "#define $config_name 1" >> $TMPH
        echo "#define $enabled_name 1" >> $TMPH
        echo "$config_name=yes" >> config.mak
    else
        echo "#define $enabled_name 0" >> $TMPH
    fi
done

# Do not overwrite config.h if unchanged to avoid superfluous rebuilds.
if ! cmp -s $TMPH config.h; then
        mv -f $TMPH config.h
else
        echo "config.h is unchanged"
fi

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

# build tree in object directory if source path is different from current one
if test "$source_path_used" = "yes" ; then
    DIRS="\
         doc \
         libavformat \
         libavcodec \
         libavcodec/alpha \
         libavcodec/armv4l \
         libavcodec/bfin \
         libavcodec/i386 \
         libavcodec/sparc \
         libavcodec/mlib \
         libavcodec/ppc \
         libavcodec/liba52 \
         libpostproc \
         libavutil \
         libswscale \
         tests \
         vhook \
         "
    FILES="\
          Makefile \
          common.mak \
          libavformat/Makefile \
          libavcodec/Makefile \
          libpostproc/Makefile \
          libavutil/Makefile \
          libswscale/Makefile \
          tests/Makefile \
          vhook/Makefile \
          doc/Makefile \
          doc/texi2pod.pl \
          "
    for dir in $DIRS ; do
            mkdir -p $dir
    done
    for f in $FILES ; do
        ln -sf "$source_path/$f" $f
    done
fi


# build pkg-config files

pkgconfig_generate(){
name=$1
comment=$2
version=$3
libs=$4
requires=$5
include=$6
cat <<EOF >$name.pc
prefix=$PREFIX
exec_prefix=\${prefix}
libdir=\${exec_prefix}/lib
includedir=\${prefix}/include

Name: $name
Description: $comment
Version: $version
Requires: $requires
Conflicts:
Libs: -L\${libdir} $libs
Cflags: -I\${includedir} -I\${includedir}/$include
EOF
}

pkgconfig_generate_uninstalled(){
name=$1
shortname=${name#lib}
comment=$2
version=$3
libs=$4
requires=$5
cat <<EOF >$name-uninstalled.pc
prefix=
exec_prefix=
libdir=\${pcfiledir}/$name
includedir=\${pcfiledir}/$name

Name: $name
Description: $comment
Version: $version
Requires: $requires
Conflicts:
Libs: \${libdir}/${LIBPREF}${shortname}${LIBSUF} $libs
Cflags: -I\${includedir}
EOF
}

pkgconfig_generate libavutil "FFmpeg utility library" "$lavu_version" -lavutil "" ffmpeg
pkgconfig_generate_uninstalled libavutil "FFmpeg utility library" "$lavu_version"

pkgconfig_generate libavcodec "FFmpeg codec library" "$lavc_version" "-lavcodec $extralibs" "$pkg_requires libavutil = $lavu_version" ffmpeg
pkgconfig_generate_uninstalled libavcodec "FFmpeg codec library" "$lavc_version" "$extralibs" "$pkg_requires libavutil = $lavu_version"

pkgconfig_generate libavformat "FFmpeg container format library" "$lavf_version" "-lavformat $extralibs" "$pkg_requires libavcodec = $lavc_version" ffmpeg
pkgconfig_generate_uninstalled libavformat "FFmpeg container format library" "$lavf_version" "$extralibs" "$pkg_requires libavcodec = $lavc_version"

pkgconfig_generate libpostproc "FFmpeg post processing library" "$pp_version" -lpostproc "" postproc
pkgconfig_generate_uninstalled libpostproc "FFmpeg post processing library" "$pp_version"

if test "$swscaler" != "no"; then
  pkgconfig_generate libswscale "FFmpeg image rescaling library" "$sws_version" "-lswscale" "$pkg_requires libavutil = $lavu_version" swscale
  pkgconfig_generate_uninstalled libswscale "FFmpeg image rescaling library" "$sws_version" "" "$pkg_requires libavutil = $lavu_version"
else
  pkgconfig_generate libswscale "FFmpeg image rescaling library" "$sws_version" "" "$pkg_requires libavcodec = $lavc_version" swscale
  pkgconfig_generate_uninstalled libswscale "FFmpeg image rescaling library" "$sws_version" "" "$pkg_requires libavcodec = $lavc_version"
  apply libswscale.pc sed s/^Libs:.*$/Libs:/
  apply libswscale-uninstalled.pc sed s/^Libs:.*$/Libs:/
fi