#!/bin/sh

 #

 # FFmpeg configure script
 #

 # Copyright (c) 2000-2002 Fabrice Bellard
 # Copyright (c) 2005-2008 Diego Biurrun
 # Copyright (c) 2005-2008 Mans Rullgard

 #

 # Prevent locale nonsense from breaking basic text processing.

 LC_ALL=C
 export LC_ALL

 # 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 "  --logfile=FILE           log tests and output to FILE [config.err]"
   echo "  --disable-logging        do not log configure debug information"

   echo "  --prefix=PREFIX          install in PREFIX [$prefix]"

   echo "  --bindir=DIR             install binaries in DIR [PREFIX/bin]"

   echo "  --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]"

   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]"

   echo "  --mandir=DIR             install man page in DIR [PREFIX/share/man]"

   echo
   echo "Configuration options:"

   echo "  --disable-static         do not build static libraries [no]"
   echo "  --enable-shared          build shared libraries [no]"

   echo "  --enable-gpl             allow use of GPL code, the resulting libs"
   echo "                           and binaries will be under GPL [no]"

   echo "  --enable-version3        upgrade (L)GPL to version 3 [no]"

   echo "  --enable-nonfree         allow use of nonfree code, the resulting libs"
   echo "                           and binaries will be unredistributable [no]"

   echo "  --disable-ffmpeg         disable ffmpeg build"
   echo "  --disable-ffplay         disable ffplay build"
   echo "  --disable-ffserver       disable ffserver build"

   echo "  --enable-postproc        enable GPLed postprocessing support [no]"

   echo "  --enable-swscale         enable software scaler support [no]"

   echo "  --enable-avfilter        video filter support (replaces vhook) [no]"

   echo "  --enable-avfilter-lavf   video filters dependent on avformat [no]"

   echo "  --disable-vhook          disable video hooking support"

   echo "  --enable-beosthreads     use BeOS threads [no]"
   echo "  --enable-os2threads      use OS/2 threads [no]"
   echo "  --enable-pthreads        use pthreads [no]"
   echo "  --enable-w32threads      use Win32 threads [no]"
   echo "  --enable-x11grab         enable X11 grabbing [no]"

   echo "  --enable-vdpau           enable VDPAU support [no]"

   echo "  --disable-network        disable network support [no]"
   echo "  --disable-ipv6           disable IPv6 support [no]"
   echo "  --disable-mpegaudio-hp   faster (but less accurate) MPEG audio decoding [no]"
   echo "  --enable-gray            enable full grayscale support (slower color)"

   echo "  --enable-fastdiv         enable table-based division"

   echo "  --enable-small           optimize for size instead of speed"
   echo "  --disable-aandct         disable AAN DCT code"
   echo "  --disable-fft            disable FFT code"
   echo "  --disable-golomb         disable Golomb code"
   echo "  --disable-mdct           disable MDCT code"

   echo "  --disable-rdft           disable RDFT code"

   echo "  --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)"

   echo "  --enable-hardcoded-tables use hardcoded tables instead of runtime generation"
   echo "  --enable-memalign-hack   emulate memalign, interferes with memory debuggers"
   echo "  --enable-beos-netserver  enable BeOS netserver"
   echo "  --disable-encoder=NAME   disable encoder NAME"
   echo "  --enable-encoder=NAME    enable encoder NAME"
   echo "  --disable-encoders       disable all encoders"
   echo "  --disable-decoder=NAME   disable decoder NAME"
   echo "  --enable-decoder=NAME    enable decoder NAME"
   echo "  --disable-decoders       disable all decoders"
   echo "  --disable-muxer=NAME     disable muxer NAME"
   echo "  --enable-muxer=NAME      enable muxer NAME"
   echo "  --disable-muxers         disable all muxers"
   echo "  --disable-demuxer=NAME   disable demuxer NAME"
   echo "  --enable-demuxer=NAME    enable demuxer NAME"
   echo "  --disable-demuxers       disable all demuxers"
   echo "  --enable-parser=NAME     enable parser NAME"
   echo "  --disable-parser=NAME    disable parser NAME"
   echo "  --disable-parsers        disable all parsers"
   echo "  --enable-bsf=NAME        enable bitstream filter NAME"
   echo "  --disable-bsf=NAME       disable bitstream filter NAME"
   echo "  --disable-bsfs           disable all bitstream filters"
   echo "  --enable-protocol=NAME   enable protocol NAME"
   echo "  --disable-protocol=NAME  disable protocol NAME"
   echo "  --disable-protocols      disable all protocols"
   echo "  --disable-indevs         disable input devices"
   echo "  --disable-outdevs        disable output devices"
   echo "  --disable-devices        disable all devices"
   echo "  --enable-filter=NAME     enable filter NAME"
   echo "  --disable-filter=NAME    disable filter NAME"
   echo "  --disable-filters        disable all filters"
   echo "  --list-decoders          show all available decoders"
   echo "  --list-encoders          show all available encoders"
   echo "  --list-muxers            show all available muxers"
   echo "  --list-demuxers          show all available demuxers"
   echo "  --list-parsers           show all available parsers"
   echo "  --list-protocols         show all available protocols"
   echo "  --list-bsfs              show all available bitstream filters"
   echo "  --list-indevs            show all available input devices"
   echo "  --list-outdevs           show all available output devices"
   echo "  --list-filters           show all available filters"

   echo
   echo "External library support:"

   echo "  --enable-avisynth        enable reading of AVISynth script files [no]"

   echo "  --enable-bzlib           enable bzlib [autodetect]"
   echo "  --enable-libamr-nb       enable libamr-nb floating point audio codec [no]"
   echo "  --enable-libamr-wb       enable libamr-wb floating point audio codec [no]"

   echo "  --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]"
   echo "  --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]"

   echo "  --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394"

   echo "                           and libraw1394 [no]"
   echo "  --enable-libdirac        enable Dirac support via libdirac [no]"
   echo "  --enable-libfaac         enable FAAC support via libfaac [no]"
   echo "  --enable-libfaad         enable FAAD support via libfaad [no]"
   echo "  --enable-libfaadbin      open libfaad.so.0 at runtime [no]"
   echo "  --enable-libgsm          enable GSM support via libgsm [no]"
   echo "  --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]"

   echo "  --enable-libnut          enable NUT (de)muxing via libnut,"

   echo "                           native (de)muxer exists [no]"

   echo "  --enable-libopenjpeg     enable JPEG 2000 decoding via OpenJPEG [no]"

   echo "  --enable-libschroedinger enable Dirac support via libschroedinger [no]"
   echo "  --enable-libspeex        enable Speex decoding via libspeex [no]"
   echo "  --enable-libtheora       enable Theora encoding via libtheora [no]"

   echo "  --enable-libvorbis       enable Vorbis encoding via libvorbis,"

   echo "                           native implementation exists [no]"
   echo "  --enable-libx264         enable H.264 encoding via x264 [no]"

   echo "  --enable-libxvid         enable Xvid encoding via xvidcore,"

   echo "                           native MPEG-4/Xvid encoder exists [no]"

   echo "  --enable-mlib            enable Sun medialib [no]"

   echo "  --enable-zlib            enable zlib [autodetect]"

   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 "  --enable-cross-compile   assume a cross-compiler is used"

   echo "  --sysroot=PATH           root of cross-build tree"
   echo "  --sysinclude=PATH        location of cross-build system headers"

   echo "  --target-os=OS           compiler targets OS [$target_os]"

   echo "  --target-exec=CMD        command to run executables on target"
   echo "  --target-path=DIR        path to view of build directory on target"

   echo "  --nm=NM                  use nm tool"

   echo "  --cc=CC                  use C compiler CC [$cc_default]"

   echo "  --host-cc=HOSTCC         use host C compiler HOSTCC"
   echo "  --host-cflags=HCFLAGS    use HCFLAGS when compiling for host"
   echo "  --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host"
   echo "  --host-libs=HLIBS        use libs HLIBS when linking for host"

   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 "  --extra-version=STRING   version string suffix []"

   echo "  --build-suffix=SUFFIX    library name suffix []"
   echo "  --arch=ARCH              select architecture [$arch]"
   echo "  --cpu=CPU                select the minimum required CPU (affects"

   echo "                           instruction selection, may crash on older CPUs)"

   echo "  --enable-powerpc-perf    enable performance report on PPC"

   echo "                           (requires enabling PMC)"

   echo "  --disable-altivec        disable AltiVec optimizations"

   echo "  --disable-amd3dnow       disable 3DNow! optimizations"

   echo "  --disable-amd3dnowext    disable 3DNow! extended optimizations"

   echo "  --disable-mmx            disable MMX optimizations"
   echo "  --disable-mmx2           disable MMX2 optimizations"

   echo "  --disable-sse            disable SSE optimizations"

   echo "  --disable-ssse3          disable SSSE3 optimizations"
   echo "  --disable-armv5te        disable armv5te optimizations"
   echo "  --disable-armv6          disable armv6 optimizations"

   echo "  --disable-armv6t2        disable armv6t2 optimizations"

   echo "  --disable-armvfp         disable ARM VFP optimizations"

   echo "  --disable-iwmmxt         disable iwmmxt optimizations"

   echo "  --disable-mmi            disable MMI optimizations"
   echo "  --disable-neon           disable neon optimizations"
   echo "  --disable-vis            disable VIS optimizations"

   echo "  --disable-yasm           disable use of yasm assembler"

   echo
   echo "Developer options (useful when working on FFmpeg itself):"

   echo "  --disable-debug          disable debugging symbols"

   echo "  --enable-debug=LEVEL     set the debug level [$debuglevel]"

   echo "  --enable-gprof           enable profiling with gprof [$gprof]"

   echo "  --disable-optimizations  disable compiler optimizations"

   echo "  --enable-extra-warnings  enable more compiler warnings"

   echo "  --disable-stripping      disable stripping of executables and shared libraries"

   echo ""
   echo "NOTE: Object files are built at the place where configure is launched."

   exit 0

 }

 log(){

     echo "$@" >> $logfile

 }
 

 log_file(){

     log BEGIN $1

     pr -n -t $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-user@mplayerhq.hu mailing list or IRC #ffmpeg on irc.freenode.net.

 EOF

     if disabled logging; then

         cat <<EOF

 Rerun configure with logging enabled (do not use --disable-logging), and
 include the log this produces with your report.

 EOF
     else
 cat <<EOF

 Include the log file "$logfile" produced by configure as this will help
 solving the problem.

 EOF
     fi

     exit 1
 }
 

 # Avoid locale weirdness, besides we really just want to translate ASCII.

 toupper(){

     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ

 }
 

 tolower(){

     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz

 }
 

 c_escape(){
     echo "$*" | sed 's/["\\]/\\\0/g'
 }
 

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

 set_weak(){
     value=$1
     shift
     for var; do
         eval : \${$var:=$value}
     done
 }
 

 pushvar(){
     for var in $*; do
         eval level=\${${var}_level:=0}
         eval ${var}_${level}="\$$var"
         eval ${var}_level=$(($level+1))
     done
 }
 
 popvar(){
     for var in $*; do
         eval level=\${${var}_level:-0}
         test $level = 0 && continue
         eval level=$(($level-1))
         eval $var="\${${var}_${level}}"
         eval ${var}_level=$level
         eval unset ${var}_${level}
     done
 }
 

 enable(){
     set_all yes $*
 }
 
 disable(){
     set_all no $*
 }
 

 enable_weak(){
     set_weak yes $*
 }
 
 disable_weak(){
     set_weak no $*
 }
 

 enable_safe(){
     enable $(echo "$*" | sed 's/[^A-Za-z0-9_ ]/_/g')
 }
 
 disable_safe(){
     disable $(echo "$*" | sed 's/[^A-Za-z0-9_ ]/_/g')
 }
 

 do_enable_deep(){
     for var; do
         enabled $var && continue
         eval sel="\$${var}_select"

         eval sgs="\$${var}_suggest"
         pushvar var sgs

         enable_deep $sel

         popvar sgs
         enable_deep_weak $sgs

         popvar var
     done
 }
 
 enable_deep(){
     do_enable_deep $*
     enable $*
 }
 

 enable_deep_weak(){
     do_enable_deep $*
     enable_weak $*
 }
 

 enabled(){

     test "${1#!}" = "$1" && op== || op=!=
     eval test "x\$${1#!}" $op "xyes"

 }
 

 disabled(){

     test "${1#!}" = "$1" && op== || op=!=
     eval test "x\$${1#!}" $op "xno"

 }
 

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

 disabled_all(){
     for opt; do
         disabled $opt || return 1
     done
 }
 

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

 disabled_any(){
     for opt; do
         disabled $opt && return 0
     done

     return 1

 }
 

 set_default(){
     for opt; do

         eval : \${$opt:=\$${opt}_default}

     done
 }
 

 is_in(){
     value=$1
     shift
     for var in $*; do
         [ $var = $value ] && return 0
     done
     return 1
 }
 

 check_deps(){
     for cfg; do

         cfg="${cfg#!}"

         enabled ${cfg}_checking && die "Circular dependency for $cfg."
         disabled ${cfg}_checking && continue
         enable ${cfg}_checking
 

         eval dep_all="\$${cfg}_deps"
         eval dep_any="\$${cfg}_deps_any"

         eval dep_sel="\$${cfg}_select"

         eval dep_sgs="\$${cfg}_suggest"

         pushvar cfg dep_all dep_any dep_sel dep_sgs
         check_deps $dep_all $dep_any $dep_sel $dep_sgs
         popvar cfg dep_all dep_any dep_sel dep_sgs

         enabled_all  $dep_all || disable $cfg
         enabled_any  $dep_any || disable $cfg

         disabled_any $dep_sel && disable $cfg

         if enabled $cfg; then
             eval dep_extralibs="\$${cfg}_extralibs"
             test -n "$dep_extralibs" && add_extralibs $dep_extralibs

             enable_deep $dep_sel

             enable_deep_weak $dep_sgs

         fi
 

         disable ${cfg}_checking

     done
 }
 

 print_config(){
     pfx=$1
     header=$2
     makefile=$3
     shift 3
     for cfg; do

         ucname="`toupper $cfg`"

         if enabled $cfg; then

             echo "#define ${pfx}${ucname} 1" >> $header
             echo "${pfx}${ucname}=yes" >> $makefile
         else

             echo "#define ${pfx}${ucname} 0" >> $header

         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(){

     flags_saved || return

     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_asm(){
     log check_asm "$@"
     name="$1"
     asm="$2"
     shift 2
     check_cc "$@" <<EOF && enable $name || disable $name

 void foo(void){ __asm__ volatile($asm); }

 EOF
 }
 

 check_yasm(){
     log check_yasm "$@"
     echo "$1" > $TMPS
     log_file $TMPS
     shift 1
     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
 }
 

 check_ld(){

     log check_ld "$@"

     check_cc || return

     flags=''
     libs=''
     for f; do
         test "${f}" = "${f#-l}" && flags="$flags $f" || libs="$libs $f"
     done
     check_cmd $cc $LDFLAGS $flags -o $TMPE $TMPO $extralibs $libs

 }
 
 check_cflags(){

     log check_cflags "$@"
     check_cc "$@" <<EOF && add_cflags "$@"

 int x;
 EOF
 }
 

 test_ldflags(){
     log test_ldflags "$@"
     check_ld "$@" <<EOF

 int main(void){ return 0; }

 EOF
 }
 

 check_ldflags(){
     log check_ldflags "$@"
     test_ldflags "$@" && add_ldflags "$@"
 }
 

 check_header(){

     log check_header "$@"

     header=$1
     shift

     disable_safe $header
     check_cpp "$@" <<EOF && enable_safe $header

 #include <$header>
 int x;
 EOF
 }
 
 check_func(){

     log check_func "$@"

     func=$1
     shift

     disable $func
     check_ld "$@" <<EOF && enable $func

 extern int $func();

 int main(void){ $func(); }

 EOF
 }
 

 check_func_headers(){
     log check_func_headers "$@"

     headers=$1
     func=$2
     shift 2
     disable $func
     incs=""
     for hdr in $headers; do
         incs="$incs
 #include <$hdr>"
     done

     check_ld "$@" <<EOF && enable $func && enable_safe $headers

 $incs

 int main(int argc, char **argv){

     (void) $func;
     return 0;
 }
 EOF
 }
 

 check_cpp_condition(){
     log check_cpp_condition "$@"
     header=$1
     condition=$2
     check_cpp <<EOF
 #include <$header>
 #if !($condition)
 #error "unsatisfied condition: $condition"
 #endif
 EOF
 }
 

 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_lib2(){
     log check_lib2 "$@"
     headers="$1"
     func="$2"
     shift 2
     temp_extralibs "$@"

     check_func_headers "$headers" $func && add_extralibs "$@"

     err=$?
     restore_flags
     return $err
 }
 

 check_exec(){

     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }

 }
 

 check_exec_crash(){
     code=`cat`
 
     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
     # are safe but may not be available everywhere.  Thus we use
     # raise(SIGTERM) instead.  The check is run in a subshell so we
     # can redirect the "Terminated" message from the shell.  SIGBUS
     # is not defined by standard C so it is used conditionally.
 

     (check_exec "$@") >> $logfile 2>&1 <<EOF

 #include <signal.h>
 static void sighandler(int sig){
     raise(SIGTERM);
 }

 int main(void){

     signal(SIGILL, sighandler);
     signal(SIGFPE, sighandler);
     signal(SIGSEGV, sighandler);
 #ifdef SIGBUS
     signal(SIGBUS, sighandler);
 #endif
     { $code }
 }
 EOF
 }
 

 check_type(){
     log check_type "$@"
     headers=$1
     type=$2
     shift 2
     disable $type
     incs=""
     for hdr in $headers; do
         incs="$incs
 #include <$hdr>"
     done
     check_cc "$@" <<EOF && enable $type
 $incs
 $type v;
 EOF
 }
 

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

 }
 

 require2(){
     name="$1"
     headers="$2"
     func="$3"
     shift 3
     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
 }
 

 check_foo_config(){
     cfg=$1
     pkg=$2
     header=$3
     func=$4
     shift 4
     disable $cfg
     check_cmd ${pkg}-config --version
     err=$?
     if test "$err" = 0; then
         temp_cflags `${pkg}-config --cflags`
         temp_extralibs `${pkg}-config --libs`
         check_lib "$@" $header $func && enable $cfg
     fi
     return $err
 }
 

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

 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
 # system-dependent things.
 

 COMPONENT_LIST="
     bsfs
     decoders
     demuxers
     encoders

     filters

     indevs

     muxers

     outdevs

     parsers
     protocols
 "
 
 CONFIG_LIST="
     $COMPONENT_LIST

     aandct

     avfilter
     avfilter_lavf

     avisynth
     beos_netserver

     bzlib

     fastdiv

     ffmpeg
     ffplay
     ffserver

     fft

     golomb

     gpl

     gprof

     gray

     hardcoded_tables

     ipv6

     libamr_nb
     libamr_wb

     libdc1394

     libdirac

     libfaac
     libfaad
     libfaadbin

     libgsm

     libmp3lame

     libnut

     libopencore_amrnb
     libopencore_amrwb

     libopenjpeg

     libschroedinger

     libspeex

     libtheora

     libvorbis

     libx264
     libxvid

     mdct

     memalign_hack

     mlib

     mpegaudio_hp
     network

     nonfree

     postproc

     powerpc_perf

     rdft

     runtime_cpudetect

     shared

     small

     static

     swscale

     vdpau

     vhook

     version3

     x11grab

     zlib

 "

 THREADS_LIST='
     beosthreads

     os2threads

     pthreads
     w32threads
 '
 

 ARCH_LIST='
     alpha

     arm

     bfin
     ia64
     m68k
     mips
     parisc

     ppc

     s390
     sh4
     sparc
     sparc64
     x86
     x86_32
     x86_64
 '
 
 ARCH_EXT_LIST='

     altivec

     amd3dnow

     amd3dnowext

     armv5te

     armv6

     armv6t2

     armvfp

     iwmmxt
     mmi
     mmx

     mmx2

     neon

     ppc4xx

     sse

     ssse3

     vis

 '
 
 HAVE_LIST="
     $ARCH_EXT_LIST
     $THREADS_LIST

     alsa_asoundlib_h

     altivec_h

     arpa_inet_h

     bswap

     closesocket

     cmov

     conio_h

     dcbzl

     dev_bktr_ioctl_bt848_h
     dev_bktr_ioctl_meteor_h
     dev_ic_bt8xx_h
     dev_video_meteor_ioctl_meteor_h
     dev_video_bktr_ioctl_bt848_h

     dlfcn_h

     dlopen

     dos_paths

     ebp_available
     ebx_available

     fast_64bit

     fast_cmov

     fast_unaligned

     fork

     freetype2

     gethrtime

     GetProcessTimes

     getrusage

     imlib2

     inet_aton

     inline_asm

     libdc1394_1
     libdc1394_2

     llrint
     lrint

     lrintf

     machine_ioctl_bt848_h
     machine_ioctl_meteor_h

     malloc_h
     memalign

     mkstemp

     pld

     posix_memalign

     ppc64

     round
     roundf

     sdl
     sdl_video_size

     setmode

     socklen_t

     soundcard_h

     poll_h

     sys_mman_h

     sys_resource_h

     sys_select_h

     sys_soundcard_h

     sys_videoio_h

     ten_operands

     termios_h

     threads

     truncf

     winsock2_h

     yasm

 "

 # options emitted with CONFIG_ prefix but not available on command line
 CONFIG_EXTRA="

     gplv3
     lgplv3

     oldscaler

 "
 

 CMDLINE_SELECT="

     $ARCH_EXT_LIST

     $CONFIG_LIST

     $THREADS_LIST

     cross_compile

     debug
     extra_warnings

     logging

     optimizations

     stripping

     yasm

 "

 
 PATHS_LIST='

     bindir

     datadir

     incdir
     libdir
     mandir
     prefix
     shlibdir

 '
 
 CMDLINE_SET="
     $PATHS_LIST
     arch
     build_suffix
     cc
     cpu
     cross_prefix

     extra_version

     host_cc
     host_cflags
     host_ldflags
     host_libs

     logfile

     nm

     source_path

     sysinclude
     sysroot

     target_exec

     target_os

     target_path

 "

 # code dependency declarations
 

 # architecture extensions

 altivec_deps="ppc"

 amd3dnow_deps="mmx"

 amd3dnowext_deps="amd3dnow"

 armv5te_deps="arm"
 armv6_deps="arm"

 armv6t2_deps="arm"

 armvfp_deps="arm"
 iwmmxt_deps="arm"

 mmi_deps="mips"

 mmx_deps="x86"

 mmx2_deps="mmx"

 neon_deps="arm"

 ppc4xx_deps="ppc"

 sse_deps="mmx"
 ssse3_deps="sse"

 vis_deps="sparc"

 # common features

 oldscaler_deps="!swscale"

 # decoders / encoders

 aac_decoder_select="fft mdct"
 ac3_decoder_select="fft mdct"
 atrac3_decoder_select="fft mdct"

 cavs_decoder_select="golomb"

 cook_decoder_select="fft mdct"

 cscd_decoder_suggest="zlib"

 dca_decoder_select="fft mdct"

 dnxhd_encoder_select="aandct"

 dxa_decoder_select="zlib"

 eac3_decoder_select="fft mdct"

 eatgq_decoder_select="aandct"

 eatqi_decoder_select="aandct"

 ffv1_decoder_select="golomb"
 flac_decoder_select="golomb"
 flac_encoder_select="golomb"

 flashsv_decoder_select="zlib"
 flashsv_encoder_select="zlib"

 flv_encoder_select="aandct"
 h261_encoder_select="aandct"
 h263_encoder_select="aandct"
 h263p_encoder_select="aandct"

 h264_decoder_select="golomb"

 h264_vdpau_decoder_deps="vdpau"

 imc_decoder_select="fft mdct"

 jpegls_decoder_select="golomb"
 jpegls_encoder_select="golomb"

 ljpeg_encoder_select="aandct"

 loco_decoder_select="golomb"

 mjpeg_encoder_select="aandct"
 mpeg1video_encoder_select="aandct"
 mpeg2video_encoder_select="aandct"
 mpeg4_encoder_select="aandct"

 mpeg_vdpau_decoder_deps="vdpau"

 mpeg1_vdpau_decoder_deps="vdpau"

 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"

 msmpeg4v1_encoder_select="aandct"
 msmpeg4v2_encoder_select="aandct"
 msmpeg4v3_encoder_select="aandct"

 nellymoser_decoder_select="fft mdct"
 nellymoser_encoder_select="fft mdct"

 png_decoder_select="zlib"
 png_encoder_select="zlib"

 qdm2_decoder_select="fft mdct rdft"

 rv10_encoder_select="aandct"
 rv20_encoder_select="aandct"

 rv30_decoder_select="golomb"
 rv40_decoder_select="golomb"

 shorten_decoder_select="golomb"
 sonic_decoder_select="golomb"
 sonic_encoder_select="golomb"
 sonic_ls_encoder_select="golomb"
 svq3_decoder_select="golomb"

 svq3_decoder_suggest="zlib"

 tiff_decoder_suggest="zlib"
 tiff_encoder_suggest="zlib"
 tscc_decoder_select="zlib"

 vc1_vdpau_decoder_deps="vdpau"

 vorbis_decoder_select="fft mdct"
 vorbis_encoder_select="fft mdct"
 wmav1_decoder_select="fft mdct"
 wmav1_encoder_select="fft mdct"
 wmav2_decoder_select="fft mdct"
 wmav2_encoder_select="fft mdct"

 wmv1_encoder_select="aandct"
 wmv2_encoder_select="aandct"

 wmv3_vdpau_decoder_deps="vdpau"

 zlib_decoder_select="zlib"
 zlib_encoder_select="zlib"
 zmbv_decoder_select="zlib"
 zmbv_encoder_select="zlib"

 # external libraries

 libamr_nb_decoder_deps="libamr_nb"
 libamr_nb_encoder_deps="libamr_nb"
 libamr_wb_decoder_deps="libamr_wb"
 libamr_wb_encoder_deps="libamr_wb"

 libdirac_decoder_deps="libdirac !libschroedinger"

 libdirac_encoder_deps="libdirac"

 libfaac_encoder_deps="libfaac"

 libfaad_decoder_deps="libfaad"

 libfaadbin_decoder_extralibs='$ldl'

 libgsm_decoder_deps="libgsm"
 libgsm_encoder_deps="libgsm"

 libgsm_ms_decoder_deps="libgsm"
 libgsm_ms_encoder_deps="libgsm"

 libmp3lame_encoder_deps="libmp3lame"

 libopencore_amrnb_decoder_deps="libopencore_amrnb"
 libopencore_amrnb_encoder_deps="libopencore_amrnb"
 libopencore_amrwb_decoder_deps="libopencore_amrwb"

 libopenjpeg_decoder_deps="libopenjpeg"

 libschroedinger_decoder_deps="libschroedinger"
 libschroedinger_encoder_deps="libschroedinger"

 libspeex_decoder_deps="libspeex"

 libtheora_encoder_deps="libtheora"

 libvorbis_encoder_deps="libvorbis"

 libx264_encoder_deps="libx264"
 libxvid_encoder_deps="libxvid"

 mpeg4aac_decoder_deps="libfaad"

 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"

 # demuxers / muxers

 ac3_demuxer_deps="ac3_parser"

 alsa_demuxer_deps="alsa_asoundlib_h snd_pcm_htimestamp"
 alsa_demuxer_extralibs="-lasound"
 alsa_muxer_deps="alsa_asoundlib_h"
 alsa_muxer_extralibs="-lasound"

 audio_beos_demuxer_deps="audio_beos"

 audio_beos_demuxer_extralibs="-lmedia -lbe"

 audio_beos_muxer_deps="audio_beos"

 audio_beos_muxer_extralibs="-lmedia -lbe"

 avisynth_demuxer_deps="avisynth"

 bktr_demuxer_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"

 dirac_demuxer_deps="dirac_parser"

 dv1394_demuxer_deps="dv1394 dv_demuxer"

 libdc1394_demuxer_deps="libdc1394"

 libnut_demuxer_deps="libnut"
 libnut_muxer_deps="libnut"

 matroska_demuxer_suggest="zlib bzlib"
 mov_demuxer_suggest="zlib"

 mp3_demuxer_deps="mpegaudio_parser"

 oss_demuxer_deps_any="soundcard_h sys_soundcard_h"
 oss_muxer_deps_any="soundcard_h sys_soundcard_h"

 redir_demuxer_deps="network"

 rtp_muxer_deps="network rtp_protocol"

 rtsp_demuxer_deps="sdp_demuxer"
 sdp_demuxer_deps="rtp_protocol mpegts_demuxer"

 v4l_demuxer_deps="linux_videodev_h"

 v4l2_demuxer_deps_any="linux_videodev2_h sys_videoio_h"

 vfwcap_demuxer_deps="capCreateCaptureWindow"
 vfwcap_demuxer_extralibs="-lvfw32"

 x11_grab_device_demuxer_deps="x11grab XShmCreateImage"

 x11_grab_device_demuxer_extralibs="-lX11 -lXext"

 # protocols

 gopher_protocol_deps="network"

 http_protocol_deps="network"
 rtp_protocol_deps="udp_protocol"
 tcp_protocol_deps="network"
 udp_protocol_deps="network"
 

 # filters

 movie_filter_deps="avfilter_lavf"

 # programs

 ffplay_deps="sdl"

 ffserver_deps="ffm_muxer rtp_protocol rtsp_demuxer"

 ffserver_extralibs='$ldl'
 vhook_extralibs='$ldl'

 # default parameters

 logfile="config.err"

 
 # installation paths

 prefix_default="/usr/local"
 bindir_default='${prefix}/bin'

 datadir_default='${prefix}/share/ffmpeg'

 incdir_default='${prefix}/include'
 libdir_default='${prefix}/lib'
 mandir_default='${prefix}/share/man'
 shlibdir_default="$libdir_default"

 
 # toolchain

 ar="ar"

 cc_default="gcc"

 host_cc_default="gcc"

 ln_s="ln -sf"

 nm_default="nm"

 objformat="elf"

 ranlib="ranlib"

 strip="strip"

 yasmexe="yasm"

 
 # machine

 arch=`uname -m`

 cpu="generic"

 
 # OS

 target_os=$(tolower $(uname -s))

 
 # configurable options

 enable debug
 enable ffmpeg
 enable ffplay
 enable ffserver
 enable ipv6
 enable mpegaudio_hp
 enable network

 enable oldscaler

 enable optimizations

 enable protocols

 enable static

 enable stripping

 vhook="default"
 
 # build settings

 add_cflags -D_ISOC99_SOURCE -D_POSIX_C_SOURCE=200112

 SHFLAGS='-shared -Wl,-soname,$$(@F)'

 VHOOKSHFLAGS='-shared -Wl,-soname,$$(@F)'

 FFSERVERLDFLAGS=-Wl,-E

 LIBPREF="lib"
 LIBSUF=".a"

 FULLNAME='$(NAME)$(BUILDSUF)'
 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'

 SLIBPREF="lib"
 SLIBSUF=".so"

 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'

 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'

 LIB_INSTALL_EXTRA_CMD='$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'

 host_cflags='-O3 -g -Wall'
 host_libs='-lm'
 

 target_path='.'
 

 # gcc stupidly only outputs the basename of targets with -MM, but we need the
 # full relative path for objects in subdirectories for non-recursive Make.

 DEPEND_CMD='$(CC) $(CFLAGS) -MM $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o,"'

 # find source path
 source_path="`dirname \"$0\"`"

 enable source_path_used

 if test -z "$source_path" -o "$source_path" = "." ; then
     source_path="`pwd`"

     disable source_path_used

 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
 
 FFMPEG_CONFIGURATION="$@"
 

 find_things(){
     thing=$1
     pattern=$2
     file=$source_path/$3

     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"

 }
 
 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
 OUTDEV_LIST=$(find_things   muxer    _MUX     libavdevice/alldevices.c)
 INDEV_LIST=$(find_things    demuxer  DEMUX    libavdevice/alldevices.c)
 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)

 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)

 enable $ARCH_EXT_LIST \
        $DECODER_LIST \
        $ENCODER_LIST \
        $PARSER_LIST \
        $BSF_LIST \
        $DEMUXER_LIST \
        $MUXER_LIST \

        $FILTER_LIST \

        $PROTOCOL_LIST \
        $INDEV_LIST \
        $OUTDEV_LIST \

 
 die_unknown(){
     echo "Unknown option \"$1\"."
     echo "See $0 --help for available options."
     exit 1
 }
 

 show_list() {

     suffix=_$1
     shift
     echo $* | sed s/$suffix//g | tr ' ' '\n' | sort

     exit 0
 }
 

 for opt do

     optval="${opt#*=}"
     case "$opt" in

     --extra-cflags=*) add_cflags $optval

     ;;

     --extra-ldflags=*) add_ldflags $optval

     ;;

     --extra-libs=*) add_extralibs $optval

     ;;

     --disable-devices) disable $INDEV_LIST $OUTDEV_LIST

     ;;

     --enable-debug=*) debuglevel="$optval"
     ;;

     --enable-*=*|--disable-*=*)
     eval `echo "$opt" | sed 's/=/-/;s/--/action=/;s/-/ thing=/;s/-/ name=/'`
     case "$thing" in

         encoder|decoder|muxer|demuxer|parser|bsf|protocol|filter) $action ${optval}_${thing} ;;

         *) die_unknown "$opt" ;;
     esac
     ;;
     --enable-?*|--disable-?*)
     eval `echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g'`

     if is_in $option $COMPONENT_LIST; then
         eval $action \$$(toupper ${option%s})_LIST
     elif is_in $option $CMDLINE_SELECT; then
         $action $option
     else
         die_unknown $opt
     fi

     ;;
     --list-*)
         NAME="${opt#--list-}"
         is_in $NAME $COMPONENT_LIST || die_unknown $opt
         NAME=${NAME%s}
         eval show_list $NAME \$$(toupper $NAME)_LIST
     ;;
     --help|-h) show_help
     ;;
     *)

     optname="${opt%%=*}"

     optname="${optname#--}"
     optname=$(echo "$optname" | sed 's/-/_/g')
     is_in $optname $CMDLINE_SET || die_unknown $opt
     eval $optname='$optval'

     ;;
     esac

 done
 

 disabled logging && logfile=/dev/null
 
 echo "# $0 $@" > $logfile
 set >> $logfile
 

 test -n "$cross_prefix" && enable cross_compile
 

 ar="${cross_prefix}${ar}"

 cc_default="${cross_prefix}${cc_default}"

 nm_default="${cross_prefix}${nm_default}"

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

 sysinclude_default="${sysroot}/usr/include"
 
 set_default cc nm sysinclude

 enabled cross_compile || host_cc_default=$cc
 set_default host_cc

 case $target_os in
     mingw32*|cygwin*|*-dos|freedos|opendos|os/2*) EXESUF=.exe ;;
 esac
 

 # set temporary file name

 : ${TMPDIR:=$TEMPDIR}

 : ${TMPDIR:=$TMP}

 : ${TMPDIR:=/tmp}

 
 if ! check_cmd type mktemp; then
     # simple replacement for missing mktemp
     # NOT SAFE FOR GENERAL USE
     mktemp(){
         echo "${2%XXX*}.${HOSTNAME}.${UID}.$$"
     }
 fi
 
 
 tmpfile(){
     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
         (set -C; exec > $tmp) 2>/dev/null ||
         die "Unable to create temoporary file in $TMPDIR."
     append TMPFILES $tmp
     eval $1=$tmp
 }
 
 trap 'rm -f -- $TMPFILES' EXIT
 trap exit HUP INT TERM
 
 tmpfile TMPC  .c
 tmpfile TMPE  $EXESUF
 tmpfile TMPH  .h
 tmpfile TMPO  .o
 tmpfile TMPS  .S
 tmpfile TMPV  .ver
 tmpfile TMPSH .sh
 
 unset -f mktemp

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

 if   $cc --version 2>/dev/null | grep -qi gcc; then

     cc_type=gcc
 elif $cc --version 2>/dev/null | grep -q Intel; then
     cc_type=icc
 elif $cc -v 2>&1 | grep -q xlc; then
     cc_type=xlc

 elif $cc -V 2>/dev/null | grep -q Compaq; then
     cc_type=ccc
     DEPEND_CMD='$(CC) $(CFLAGS) -M $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o,"'
     add_ldflags -Wl,-z,now # calls to libots crash without this

 fi
 
 test -n "$cc_type" && enable $cc_type || echolog "Unknown C compiler $cc"
 

 if test -n "$sysroot"; then
     case "$cc_type" in
         gcc)
             add_cflags  --sysroot="$sysroot"
             add_ldflags --sysroot="$sysroot"
         ;;
     esac
 fi
 

 # compiler sanity check
 check_exec <<EOF
 int main(void){ return 0; }
 EOF
 if test "$?" != 0; then
     echo "$cc is unable to create an executable file."
     if test -z "$cross_prefix" && ! enabled cross_compile ; then
         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
         echo "Only do this if you know what cross compiling means."
     fi
     die "C compiler test failed."
 fi
 

 check_cflags -std=c99
 

 case "$arch" in
     alpha)
         arch="alpha"
         enable fast_64bit

         check_cflags -mieee

     ;;

     arm|armv[4567]*l)
         arch="arm"

     ;;

     avr32)
     ;;

     bfin)
         arch="bfin"
     ;;
     ia64)
         arch="ia64"

         enable fast_64bit

     ;;
     m68k)
         arch="m68k"

     ;;

     mips|mipsel|IP*)

         arch="mips"
     ;;

     mips64)
         arch="mips"
         enable fast_64bit
     ;;

     parisc|hppa)

         arch="parisc"
     ;;

     parisc64|hppa64)

         arch="parisc"
         enable fast_64bit
     ;;

     "Power Macintosh"|ppc|powerpc)
         arch="ppc"
         enable fast_unaligned
     ;;
     ppc64)
         arch="ppc"
         enable fast_64bit
         enable fast_unaligned
     ;;

     s390|s390x)
         arch="s390"
     ;;

     sh4|sh)
         arch="sh4"

     ;;

     sparc)
         arch="sparc"
     ;;
     sun4u|sparc64)
         arch="sparc"
         subarch="sparc64"

         enable fast_64bit
     ;;

     i386|i486|i586|i686|i86pc|BePC)
         arch="x86"
         subarch="x86_32"
         enable fast_unaligned
     ;;
     x86_64|amd64)
         arch="x86"
         subarch="x86_32"
         enable cmov
         enable fast_cmov
         enable fast_unaligned
         check_cc <<EOF && enable fast_64bit && subarch="x86_64"
         int test[sizeof(char*) - 7];
 EOF

     ;;
     *)
         arch="unknown"
     ;;
 esac
 

 enable $arch $subarch

 # OS specific

 case $target_os in

     beos|haiku|zeta)

         prefix_default="$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"
             disable mmx
             ;;
           *20010315*) echo "BeBits gcc"

             add_cflags -fno-expensive-optimizations

             ;;
         esac
         SHFLAGS=-nostart
         # enable BeOS things
         enable audio_beos
         # no need for libm, but the inet stuff
         # Check for BONE
         # XXX: actually should check for NOT net_server

         if echo $BEINCLUDES | grep -q 'headers/be/bone'; then

             network_extralibs="-lbind -lsocket"
         else
             enable beos_netserver
             network_extralibs="-lnet"
         fi ;;
     sunos)
         FFSERVERLDFLAGS=""

         SHFLAGS='-shared -Wl,-h,$$(@F)'

         network_extralibs="-lsocket -lnsl"

         add_cflags -D__EXTENSIONS__

         ;;
     netbsd)
         oss_demuxer_extralibs="-lossaudio"
         oss_muxer_extralibs="-lossaudio"
         ;;
     openbsd)
         disable need_memalign
         LIBOBJFLAGS='$(PIC)'
         SHFLAGS='-shared'
         oss_demuxer_extralibs="-lossaudio"
         oss_muxer_extralibs="-lossaudio"
         ;;
     freebsd)
         disable need_memalign
         ;;
     bsd/os)
         osextralibs="-lpoll -lgnugetopt"
         strip="strip -d"
         ;;
     darwin)
         disable need_memalign

         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR) -Wl,-read_only_relocs,suppress'

         VHOOKSHFLAGS='-dynamiclib -Wl,-single_module -flat_namespace -undefined suppress -Wl,-install_name,$(SHLIBDIR)/vhook/$$(@F)'

         strip="strip -x"
         FFLDFLAGS="-Wl,-dynamic,-search_paths_first"
         SLIBSUF=".dylib"
         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
         FFSERVERLDFLAGS=-Wl,-bind_at_load

         objformat="macho"

         enabled x86_64 && objformat="macho64"

         ;;
     mingw32*)

         target_os=mingw32

         LIBTARGET=i386

         if enabled x86_64; then

             disable need_memalign
             LIBTARGET=x64
         fi

         shlibdir_default="$bindir_default"

         VHOOKSHFLAGS='-shared -L$(BUILD_ROOT)/libavformat -L$(BUILD_ROOT)/libavcodec -L$(BUILD_ROOT)/libavutil'
         VHOOKLIBS='-lavformat$(BUILDSUF) -lavcodec$(BUILDSUF) -lavutil$(BUILDSUF) $(EXTRALIBS)'

         if enabled swscale; then

             VHOOKSHFLAGS="$VHOOKSHFLAGS -L\$(BUILD_ROOT)/libswscale"
             VHOOKLIBS="$VHOOKLIBS -lswscale\$(BUILDSUF)"
         fi
         disable ffserver
         SLIBPREF=""
         SLIBSUF=".dll"
         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'

         SLIB_EXTRA_CMD='-lib /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.lib)'

         SLIB_INSTALL_EXTRA_CMD='-install -m 644 $(SUBDIR)$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.lib) "$(SHLIBDIR)/$(SLIBNAME:$(SLIBSUF)=.lib)"; \
             install -m 644 $(SUBDIR)$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.lib) "$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.lib)"'

         SLIB_UNINSTALL_EXTRA_CMD='rm -f "$(SHLIBDIR)/$(SLIBNAME:$(SLIBSUF)=.lib)"'

         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.def) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'

         objformat="win32"

         enable dos_paths

         check_cflags -fno-common

         if ! enabled x86_64; then

             check_cpp_condition _mingw.h "(__MINGW32_MAJOR_VERSION > 3) || (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
                 die "ERROR: MinGW runtime version must be >= 3.15."
             enabled_any avisynth vfwcap_demuxer &&
                 { check_cpp_condition w32api.h "(__W32API_MAJOR_VERSION > 3) || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION >= 13)" ||
                   die "ERROR: avisynth and vfwcap_demuxer require w32api version 3.13 or later."; }
             fi

         ;;
     cygwin*)

         target_os=cygwin

         shlibdir_default="$bindir_default"

         VHOOKSHFLAGS='-shared -L$(BUILD_ROOT)/libavformat -L$(BUILD_ROOT)/libavcodec -L$(BUILD_ROOT)/libavutil'
         VHOOKLIBS='-lavformat$(BUILDSUF) -lavcodec$(BUILDSUF) -lavutil$(BUILDSUF) $(EXTRALIBS)'

         if enabled swscale; then

             VHOOKSHFLAGS="$VHOOKSHFLAGS -L\$(BUILD_ROOT)/libswscale"
             VHOOKLIBS="$VHOOKLIBS -lswscale\$(BUILDSUF)"
         fi
         SLIBPREF="cyg"
         SLIBSUF=".dll"
         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
         SHFLAGS='-shared -Wl,--enable-auto-image-base'

         objformat="win32"

         enable dos_paths

         check_cflags -fno-common

         ;;

     *-dos|freedos|opendos)
         disable ffplay ffserver vhook
         disable $INDEV_LIST $OUTDEV_LIST
         network_extralibs="-lsocket"

         objformat="coff"

         enable dos_paths

         ;;

     linux)
         enable dv1394
         ;;
     irix*)

         target_os=irix

         ranlib="echo ignoring ranlib"
         ;;

     os/2*)
         strip="lxlite"
         ln_s="cp -f"
         FFLDFLAGS="-Zomf -Zbin-files -Zargs-wild -Zmap"

         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'

         FFSERVERLDFLAGS=""

         LIBSUF="_s.a"

         SLIBPREF=""
         SLIBSUF=".dll"
         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'

         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
           echo PROTMODE >> $(SUBDIR)$(NAME).def; \
           echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
           echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
           echo EXPORTS >> $(SUBDIR)$(NAME).def; \
           emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
           emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
         SLIB_INSTALL_EXTRA_CMD='install -m 644 $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib "$(LIBDIR)"'

         SLIB_UNINSTALL_EXTRA_CMD='rm -f "$(LIBDIR)"/$(LIBPREF)$(NAME)_dll.a "$(LIBDIR)"/$(LIBPREF)$(NAME)_dll.lib'

         disable vhook

         enable dos_paths

         ;;

     interix)
         disable vhook
         ;;

     gnu/kfreebsd)
         ;;

     gnu)
         disable dv1394
         ;;

     *)

         die "Unknown OS '$target_os'."

         ;;
 esac
 

 set_default $PATHS_LIST
 

 add_extralibs $osextralibs

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

 # we need to build at least one lib type

 if ! enabled_any static shared; 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
 

 disabled static && LIBNAME=""

 if enabled_any libfaad libfaadbin ; 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
         test $? = 0 && enable libfaad2
     else

         die "FAAD test failed."

     fi
 fi
 
 

 die_license_disabled() {

     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }

 }
 
 die_license_disabled gpl libfaad2
 die_license_disabled gpl libx264
 die_license_disabled gpl libxvid
 die_license_disabled gpl postproc
 die_license_disabled gpl x11grab
 
 die_license_disabled nonfree libamr_nb
 die_license_disabled nonfree libamr_wb

 die_license_disabled nonfree libfaac

 die_license_disabled version3 libopencore_amrnb
 die_license_disabled version3 libopencore_amrwb
 

 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }

 check_deps $ARCH_EXT_LIST

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

 #Darwin CC versions

 if test $target_os = darwin; then

     if enabled xlc; then

         add_cflags -qpdf2 -qlanglvl=extc99 -qmaxmem=-1 -qarch=auto -qtune=auto

     else

         add_cflags -pipe
         check_cflags -force_cpusubtype_ALL
         check_cflags -Wno-sign-compare

         enabled shared || check_cflags -mdynamic-no-pic

     fi

 fi
 

 disabled optimizations || check_cflags -fomit-frame-pointer

 # Add processor-specific flags

 if test $cpu != "generic"; then

     warn_altivec(){
         $1 altivec && echo "WARNING: Tuning for $2 but AltiVec $1.";

     }

     case $cpu in

         601|ppc601|PowerPC601)

             add_cflags -mcpu=601

             warn_altivec enabled PPC601

         ;;
         603*|ppc603*|PowerPC603*)

             add_cflags -mcpu=603

             warn_altivec enabled PPC603

         ;;
         604*|ppc604*|PowerPC604*)

             add_cflags -mcpu=604

             warn_altivec enabled PPC604

         ;;
         G3|g3|75*|ppc75*|PowerPC75*)

             add_cflags -mcpu=750 -mpowerpc-gfxopt

             warn_altivec enabled PPC75x

         ;;
         G4|g4|745*|ppc745*|PowerPC745*)

             add_cflags -mcpu=7450 -mpowerpc-gfxopt

             warn_altivec disabled PPC745x

         ;;
         74*|ppc74*|PowerPC74*)

             add_cflags -mcpu=7400 -mpowerpc-gfxopt

             warn_altivec disabled PPC74xx

         ;;
         G5|g5|970|ppc970|PowerPC970|power4*|Power4*)

             add_cflags -mcpu=970 -mpowerpc-gfxopt -mpowerpc64

             warn_altivec disabled PPC970

             enable ppc64

         ;;

         Cell|CELL|cell)

             add_cflags -mcpu=cell

             warn_altivec disabled Cell

             enable ppc64

         ;;

         # 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

             disable cmov

         ;;
         # 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|core2)

             add_cflags -march=$cpu

             enable cmov
             enable fast_cmov

         ;;
         # targets that do support conditional mov but on which it's slow

         pentium4|pentium4m|prescott|nocona)

             add_cflags -march=$cpu

             enable cmov
             disable fast_cmov

         ;;

         sparc64)

             add_cflags -mcpu=v9

         ;;

         arm11*|cortex*)

             add_cflags -mcpu=$cpu

             enable fast_unaligned
         ;;

         armv*)

             add_cflags -march=$cpu

         ;;

         arm*)

             add_cflags -mcpu=$cpu

         ;;

         ev4|ev45|ev5|ev56|pca56|ev6|ev67)

             enabled ccc && add_cflags -arch $cpu || add_cflags -mcpu=$cpu

         ;;

         *)

             echo "WARNING: Unknown CPU \"$cpu\", ignored."

         ;;

     esac
 fi
 

 check_cc <<EOF || die "Symbol mangling check failed."
 int ff_extern;
 EOF

 sym=$($nm -P -g $TMPO | grep ff_extern)

 extern_prefix=${sym%%ff_extern*}
 

 check_asm inline_asm '""'
 

 if enabled x86; then

     # check whether EBP is available on x86
     # As 'i' is stored on the stack, this program will crash
     # if the base pointer is used to access it because the
     # base pointer is cleared in the inline assembly code.

     check_exec_crash <<EOF && enable ebp_available

     volatile int i=0;

     __asm__ volatile (

         "xorl %%ebp, %%ebp"
     ::: "%ebp");
     return i;
 EOF
 
     # check wether EBX is available on x86

     check_asm ebx_available '"":::"%ebx"'

     # check whether more than 10 operands are supported
     check_cc <<EOF && enable ten_operands
 int main(void) {
     int x=0;
     __asm__ volatile(
         ""
         :"+&rm"(x), "+&rm"(x), "+&rm"(x), "+&rm"(x), "+&rm"(x), "+&rm"(x)
     );
     return 0;
 }
 EOF
 

     # check whether binutils is new enough to compile SSSE3/MMX2

     enabled ssse3 && check_asm ssse3 '"pabsw %xmm0, %xmm0"'

     enabled mmx2  && check_asm mmx2  '"movss %xmm0, %xmm0"'

 
     check_asm bswap '"bswap %%eax" ::: "%eax"'

     YASMFLAGS="-f $objformat -DARCH_$(toupper $subarch)"

     enabled     x86_64        && append YASMFLAGS "-m amd64"
     enabled_all x86_64 shared && append YASMFLAGS "-DPIC"
     case "$objformat" in
         elf) enabled debug && append YASMFLAGS "-g dwarf2" ;;

         macho64)              append YASMFLAGS "-DPIC -DPREFIX" ;;

         *)                    append YASMFLAGS "-DPREFIX"  ;;
     esac

     disabled yasm || { check_yasm "pabsw xmm0, xmm0" && enable yasm; }

 fi
 

 # check for assembler specific support
 

 enabled ppc && check_asm dcbzl '"dcbzl 0, 1"'

 enabled ppc && check_asm ppc4xx '"maclhw r10, r11, r12"'

 # check for SIMD availability
 

 # AltiVec flags: The FSF version of GCC differs from the Apple version

 if enabled altivec; then

     check_cflags -maltivec -mabi=altivec &&
         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||

         check_cflags -faltivec

     # check if our compiler supports Motorola AltiVec C API

     check_cc <<EOF || disable altivec

 $inc_altivec_h

 int main(void) {
     vector signed int v1, v2, v3;
     v1 = vec_add(v2,v3);
     return 0;
 }
 EOF

 
     # check if our compiler supports braces for vector declarations

     check_cc <<EOF || die "You need a compiler that supports {} in AltiVec vector declarations."

 $inc_altivec_h

 int main (void) { (vector int) {1}; return 0; }

 EOF

 fi

 # We have to check if pld is a nop and disable it.

 enabled arm     && check_asm pld     '"pld [r0]"'

 enabled armv5te && check_asm armv5te '"qadd r0, r0, r0"'
 enabled armv6   && check_asm armv6   '"sadd16 r0, r0, r0"'

 enabled armv6t2 && check_asm armv6t2 '"movt r0, #0"'

 enabled armvfp  && check_asm armvfp  '"fadds s0, s0, s0"'

 enabled iwmmxt  && check_asm iwmmxt  '"wunpckelub wr6, wr4"'
 enabled mmi     && check_asm mmi     '"lq $2, 0($2)"'

 enabled neon    && check_asm neon    '"vadd.i16 q0, q0, q0"'

 enabled vis     && check_asm vis     '"pdist %f0, %f0, %f0"' -mcpu=ultrasparc

 enabled vis && add_cflags -mcpu=ultrasparc -mtune=ultrasparc

 # ---
 # big/little-endian test

 check_cc <<EOF || die "endian test failed"
 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';

 EOF

 od -A n -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian

 # ---

 # check availability of some header files
 

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

 fi
 

 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
 check_func nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
 

 check_func  fork
 check_func  gethrtime
 check_func  getrusage

 check_func  inet_aton $network_extralibs

 check_func  memalign
 check_func  mkstemp

 check_func  posix_memalign

 check_func_headers io.h setmode

 check_func_headers windows.h GetProcessTimes

 check_header conio.h

 check_header dlfcn.h
 check_header malloc.h

 check_header poll.h

 check_header sys/mman.h

 check_header sys/resource.h

 check_header sys/select.h

 check_header termios.h

 check_header vdpau/vdpau.h
 check_header vdpau/vdpau_x11.h

 check_header X11/extensions/XvMClib.h

 if ! enabled_any memalign memalign_hack posix_memalign && enabled need_memalign ; then
     die "Error, no aligned memory allocator but SSE enabled, disable it or use --enable-memalign-hack."

 fi

 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib

 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib

 
 # 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_extralibs -pthread

     elif check_func pthread_create -pthreads; then
         add_cflags -pthreads

         add_extralibs -pthreads

     elif check_func pthread_create -lpthreadGC2; then
         add_extralibs -lpthreadGC2

     elif ! check_lib pthread.h pthread_create -lpthread; then
         die "ERROR: can't find pthreads library"
     fi

 fi
 

 for thread in $THREADS_LIST; do

     if enabled $thread; then

         test -n "$thread_type" &&
             die "ERROR: Only one thread type must be selected." ||

             thread_type="$thread"
     fi
 done
 

 check_lib math.h sin -lm
 

 # test for C99 functions in math.h

 for func in llrint lrint lrintf round roundf truncf; do

     check_exec <<EOF && enable $func || disable $func

 #include <math.h>

 int main(void) { return ($func(3.999f) > 0)?0:1; }

 EOF

 done

 # these are off by default, so fail if requested and not available

 enabled avisynth   && require2 vfw32 "windows.h vfw.h" AVIFileInit -lvfw32

 enabled libamr_nb  && require  libamrnb amrnb/interf_dec.h Speech_Decode_Frame_init -lamrnb -lm
 enabled libamr_wb  && require  libamrwb amrwb/dec_if.h D_IF_init -lamrwb -lm

 enabled libdirac   && add_cflags $(pkg-config --cflags dirac) &&

                       require  libdirac libdirac_decoder/dirac_parser.h dirac_decoder_init -ldirac_decoder &&
                       require  libdirac libdirac_encoder/dirac_encoder.h dirac_encoder_init -ldirac_encoder

 enabled libfaac    && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
 enabled libfaad    && require2 libfaad faad.h faacDecOpen -lfaad

 enabled libgsm     && require  libgsm gsm.h gsm_create -lgsm

 enabled libmp3lame && require  libmp3lame lame/lame.h lame_init -lmp3lame -lm

 enabled libnut     && require  libnut libnut.h nut_demuxer_init -lnut

 enabled libopencore_amrnb  && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb -lm
 enabled libopencore_amrwb  && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb -lm

 enabled libopenjpeg && require libopenjpeg openjpeg.h opj_version -lopenjpeg

 enabled libschroedinger && add_cflags $(pkg-config --cflags schroedinger-1.0) &&
                            require libschroedinger schroedinger/schro.h schro_init $(pkg-config --libs schroedinger-1.0)

 enabled libspeex   && require  libspeex speex/speex.h speex_decoder_init -lspeex

 enabled libtheora  && require  libtheora theora/theora.h theora_info_init -ltheora -logg
 enabled libvorbis  && require  libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg

 enabled libx264    && require  libx264 x264.h x264_encoder_encode -lx264 -lm &&

                       { check_cpp_condition x264.h "X264_BUILD >= 65" ||
                         die "ERROR: libx264 version must be >= 0.65."; }

 enabled libxvid    && require  libxvid xvid.h xvid_global -lxvidcore

 enabled mlib       && require  mediaLib mlib_types.h mlib_VectorSub_S16_U8_Mod -lmlib

 # libdc1394 check
 if enabled libdc1394; then
     { check_lib dc1394/dc1394.h dc1394_new -ldc1394 -lraw1394 &&
         enable libdc1394_2; } ||
     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
         enable libdc1394_1; } ||
     die "ERROR: No version of libdc1394 found "
 fi
 
 

 _restrict=
 for restrict_keyword in restrict __restrict__ __restrict; do

     check_cc <<EOF && _restrict=$restrict_keyword && break

 void foo(char * $restrict_keyword p);
 EOF

 done
 

 test "$vhook" = "default" && vhook="$dlopen"

 if test "$target_os" = cygwin -o "$target_os" = mingw32 && enabled_all static vhook ; then

     disable vhook

     echo

     echo "At the moment vhooks don't work on Cygwin or MinGW static builds."

     echo "Patches welcome."
     echo
 fi
 

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

 check_foo_config imlib2 imlib2 Imlib2.h imlib_load_font
 check_foo_config freetype2 freetype ft2build.h FT_Init_FreeType

 ##########################################

 # SDL check

 disable sdl_too_old
 disable sdl

 SDL_CONFIG="${cross_prefix}sdl-config"

 if "${SDL_CONFIG}" --version > /dev/null 2>&1; then

     sdl_cflags=`"${SDL_CONFIG}" --cflags`
     temp_cflags $sdl_cflags

     temp_extralibs `"${SDL_CONFIG}" --libs`

     if check_lib2 SDL.h SDL_Init; then

         _sdlversion=`"${SDL_CONFIG}" --version | sed 's/[^0-9]//g'`

         if test "$_sdlversion" -lt 121 ; then

             enable sdl_too_old

         else

             enable sdl

             check_cc $sdl_cflags <<EOF && enable sdl_video_size

 #include <SDL.h>

 int main(int argc, char **argv){

     const SDL_VideoInfo *vi = SDL_GetVideoInfo();
     int w = vi->current_w;
     return 0;
 }
 EOF

         fi
     fi

     restore_flags

 fi

 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html

 ##########################################

 # Network check
 
 if enabled network; then

     check_type "sys/types.h sys/socket.h" socklen_t

     # Prefer arpa/inet.h over winsock2
     if check_header arpa/inet.h ; then
         check_func closesocket
     elif check_header winsock2.h ; then

         network_extralibs="-lws2_32"

         check_type ws2tcpip.h socklen_t

         check_func_headers winsock2.h closesocket

     fi
 fi
 
 ##########################################

 # IPv6 check

 enabled network && enabled ipv6 && check_ld <<EOF && enable ipv6 || disable ipv6

 #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_header linux/videodev.h
 check_header linux/videodev2.h

 check_header sys/videoio.h

 check_func_headers "windows.h vfw.h" capCreateCaptureWindow -lvfw32

 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives

 { check_header dev/bktr/ioctl_meteor.h &&
   check_header dev/bktr/ioctl_bt848.h; } ||
 { check_header machine/ioctl_meteor.h &&
   check_header machine/ioctl_bt848.h; } ||
 { check_header dev/video/meteor/ioctl_meteor.h &&
   check_header dev/video/bktr/ioctl_bt848.h; } ||
 check_header dev/ic/bt8xx.h

 check_header sys/soundcard.h
 check_header soundcard.h

 check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
 

 # deal with the X11 frame grabber

 enabled x11grab                         &&

 check_header X11/Xlib.h                 &&
 check_header X11/extensions/XShm.h      &&
 check_func XOpenDisplay -lX11           &&

 check_func XShmCreateImage -lX11 -lXext

 enabled debug && add_cflags -g"$debuglevel"

 
 # 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

 check_cflags -Wno-pointer-sign

 check_cflags -Wcast-qual

 check_cflags -Wwrite-strings

 check_cflags -Wtype-limits

 check_cflags -Wundef

 enabled extra_warnings && check_cflags -Winline

 # add some linker flags

 check_ldflags -Wl,--warn-common

 check_ldflags -Wl,--as-needed
 check_ldflags '-Wl,-rpath-link,\$(BUILD_ROOT)/libpostproc -Wl,-rpath-link,\$(BUILD_ROOT)/libswscale -Wl,-rpath-link,\$(BUILD_ROOT)/libavfilter -Wl,-rpath-link,\$(BUILD_ROOT)/libavdevice -Wl,-rpath-link,\$(BUILD_ROOT)/libavformat -Wl,-rpath-link,\$(BUILD_ROOT)/libavcodec -Wl,-rpath-link,\$(BUILD_ROOT)/libavutil'

 check_ldflags -Wl,-Bsymbolic

 echo "X{};" > $TMPV
 test_ldflags -Wl,--version-script,$TMPV &&
     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
 

 if enabled small; then
     check_cflags -Os            # not all compilers support -Os

     optimizations="small"
 elif enabled optimizations; then

     if enabled xlc; then

         add_cflags  -O5
         add_ldflags -O5

     elif enabled ccc; then
         add_cflags -fast

     else

         add_cflags -O3

     fi

 fi

 check_cflags -fno-math-errno

 check_cflags -fno-signed-zeros

 # add some flags for Intel C Compiler

 if enabled icc; then

     # Just warnings, no remarks
     check_cflags -w1
     # -wd: Disable following warnings
     # 144, 167, 556: -Wno-pointer-sign
     # 10006: ignoring unknown option -fno-signed-zeros
     # 10156: ignoring option '-W'; no argument required
     check_cflags -wd144,167,556,10006,10156
     # 11030: Warning unknown option --as-needed
     # 10156: ignoring option '-export'; no argument required
     check_ldflags -wd10156,11030
     # Allow to compile with optimizations
     check_ldflags -march=$cpu

 elif enabled ccc; then
     # disable some annoying warnings
     add_cflags -msg_disable cvtu32to64
     add_cflags -msg_disable embedcomment
     add_cflags -msg_disable needconstext
     add_cflags -msg_disable nomainieee
     add_cflags -msg_disable ptrmismatch1
     add_cflags -msg_disable unreachcode

 fi
 

 # PIC flags for shared library objects where they are needed

 if enabled shared; then

     # LIBOBJFLAGS may have already been set in the OS configuration
     if test -z "$LIBOBJFLAGS" ; then

         case "${subarch-$arch}" in

             x86_64|ia64|alpha|sparc*|ppc|power*|parisc*|mips*) LIBOBJFLAGS='$(PIC)' ;;

         esac
     fi

 fi
 

 if enabled gprof; then

     add_cflags  -p
     add_ldflags -p

 fi
 

 VHOOKCFLAGS="-fPIC"

 # Find out if the .align argument is a power of two or not.

 check_asm asmalign_pot '".align 3"'

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

 enabled_any $FILTER_LIST       && enable filters

 enabled_any $INDEV_LIST        && enable demuxers
 enabled_any $OUTDEV_LIST       && enable muxers
 enabled_any $PROTOCOL_LIST     && enable protocols
 
 enabled_any $THREADS_LIST      && enable threads
 
 check_deps $CONFIG_LIST       \

            $CONFIG_EXTRA      \

            $HAVE_LIST         \
            $DECODER_LIST      \
            $ENCODER_LIST      \
            $PARSER_LIST       \
            $BSF_LIST          \
            $DEMUXER_LIST      \
            $MUXER_LIST        \

            $FILTER_LIST       \

            $INDEV_LIST        \
            $OUTDEV_LIST       \
            $PROTOCOL_LIST     \

 echo "install prefix            $prefix"

 echo "source path               $source_path"
 echo "C compiler                $cc"

 echo ".align is power-of-two    $asmalign_pot"

 echo "ARCH                      $arch ($cpu)"

 if test "$build_suffix" != ""; then
     echo "build suffix              $build_suffix"

 fi

 if test "$extra_version" != ""; then
     echo "version string suffix     $extra_version"
 fi

 echo "big-endian                ${bigendian-no}"

 echo "runtime cpu detection     ${runtime_cpudetect-no}"

 if enabled x86; then

     echo "yasm                      ${yasm-no}"

     echo "MMX enabled               ${mmx-no}"

     echo "MMX2 enabled              ${mmx2-no}"

     echo "3DNow! enabled            ${amd3dnow-no}"

     echo "3DNow! extended enabled   ${amd3dnowext-no}"

     echo "SSE enabled               ${sse-no}"

     echo "SSSE3 enabled             ${ssse3-no}"

     echo "CMOV enabled              ${cmov-no}"
     echo "CMOV is fast              ${fast_cmov-no}"

     echo "EBX available             ${ebx_available-no}"
     echo "EBP available             ${ebp_available-no}"

     echo "10 operands supported     ${ten_operands-no}"

 fi

 if enabled arm; then

     echo "ARMv5TE enabled           ${armv5te-no}"
     echo "ARMv6 enabled             ${armv6-no}"

     echo "ARMv6T2 enabled           ${armv6t2-no}"

     echo "ARM VFP enabled           ${armvfp-no}"

     echo "IWMMXT enabled            ${iwmmxt-no}"

     echo "NEON enabled              ${neon-no}"

 fi

 if enabled mips; then

     echo "MMI enabled               ${mmi-no}"

 fi

 if enabled ppc; then

     echo "AltiVec enabled           ${altivec-no}"

     echo "PPC 4xx optimizations     ${ppc4xx-no}"

     echo "dcbzl available           ${dcbzl-no}"

     echo "performance report        ${powerpc_perf-no}"
 fi
 if enabled sparc; then
     echo "VIS enabled               ${vis-no}"

 fi

 echo "gprof enabled             ${gprof-no}"
 echo "debug symbols             ${debug-no}"

 echo "strip symbols             ${stripping-no}"

 echo "optimizations             ${optimizations-no}"

 echo "static                    ${static-no}"
 echo "shared                    ${shared-no}"

 echo "postprocessing support    ${postproc-no}"

 echo "software scaler enabled   ${swscale-no}"

 echo "new filter support        ${avfilter-no}"

 echo "filters using lavformat   ${avfilter_lavf-no}"

 echo "video hooking             ${vhook-no}"

 if enabled vhook; then

     echo "Imlib2 support            ${imlib2-no}"
     echo "FreeType support          ${freetype2-no}"

 fi

 echo "network support           ${network-no}"

 if enabled network; then

     echo "IPv6 support              ${ipv6-no}"

 fi

 echo "threading support         ${thread_type-no}"
 echo "SDL support               ${sdl-no}"

 if enabled sdl_too_old; then

     echo "-> Your SDL version is too old - please upgrade to have FFplay/SDL support."
 fi

 echo "Sun medialib support      ${mlib-no}"
 echo "AVISynth enabled          ${avisynth-no}"
 echo "libamr-nb support         ${libamr_nb-no}"
 echo "libamr-wb support         ${libamr_wb-no}"

 echo "libdc1394 support         ${libdc1394-no}"

 echo "libdirac enabled          ${libdirac-no}"

 echo "libfaac enabled           ${libfaac-no}"
 echo "libfaad enabled           ${libfaad-no}"

 echo "libfaad dlopened          ${libfaadbin-no}"

 echo "libgsm enabled            ${libgsm-no}"
 echo "libmp3lame enabled        ${libmp3lame-no}"
 echo "libnut enabled            ${libnut-no}"

 echo "libopencore-amrnb support ${libopencore_amrnb-no}"
 echo "libopencore-amrwb support ${libopencore_amrwb-no}"

 echo "libopenjpeg enabled       ${libopenjpeg-no}"

 echo "libschroedinger enabled   ${libschroedinger-no}"

 echo "libspeex enabled          ${libspeex-no}"

 echo "libtheora enabled         ${libtheora-no}"
 echo "libvorbis enabled         ${libvorbis-no}"

 echo "libx264 enabled           ${libx264-no}"
 echo "libxvid enabled           ${libxvid-no}"

 echo "vdpau enabled             ${vdpau-no}"

 echo "zlib enabled              ${zlib-no}"

 echo "bzlib enabled             ${bzlib-no}"

 echo

 for type in decoder encoder parser demuxer muxer protocol filter bsf indev outdev; do

     echo "Enabled ${type}s:"

     eval list=\$$(toupper $type)_LIST

     for part in $list; do

         enabled $part && echo ${part%_*}
     done | sort | pr -3 -t
     echo

 done
 

 license="LGPL version 2.1 or later"

 if enabled nonfree; then

     license="nonfree and unredistributable"

 elif enabled gplv3; then
     license="GPL version 3 or later"
 elif enabled lgplv3; then
     license="LGPL version 3 or later"

 elif enabled gpl; then

     license="GPL version 2 or later"

 fi
 
 echo "License: $license"

 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 "#ifndef FFMPEG_CONFIG_H" >> $TMPH
 echo "#define FFMPEG_CONFIG_H" >> $TMPH

 echo "#define FFMPEG_CONFIGURATION \"$FFMPEG_CONFIGURATION\"" >> $TMPH

 echo "#define FFMPEG_DATADIR \"$(eval c_escape $datadir)\"" >> $TMPH

 echo "FFMPEG_CONFIGURATION=$FFMPEG_CONFIGURATION" >> config.mak

 echo "prefix=$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 "DATADIR=\$(DESTDIR)$datadir" >> config.mak

 echo "MANDIR=\$(DESTDIR)$mandir" >> config.mak

 echo "CC=$cc" >> config.mak

 echo "YASM=$yasmexe" >> config.mak

 echo "AR=$ar" >> config.mak

 echo "RANLIB=$ranlib" >> config.mak

 echo "LN_S=$ln_s" >> config.mak

 enabled stripping &&

     echo "STRIP=$strip" >> config.mak ||

     echo "STRIP=echo ignoring strip" >> config.mak

 echo "OPTFLAGS=$CFLAGS" >> config.mak

 echo "VHOOKCFLAGS=$VHOOKCFLAGS" >> config.mak

 echo "LDFLAGS=$LDFLAGS" >> config.mak

 echo "FFSERVERLDFLAGS=$FFSERVERLDFLAGS" >> config.mak

 echo "SHFLAGS=$SHFLAGS" >> config.mak

 echo "YASMFLAGS=$YASMFLAGS" >> config.mak

 echo "VHOOKSHFLAGS=$VHOOKSHFLAGS" >> config.mak

 echo "VHOOKLIBS=$VHOOKLIBS" >> config.mak

 echo "LIBOBJFLAGS=$LIBOBJFLAGS" >> config.mak

 echo "BUILD_STATIC=$static" >> config.mak

 echo "BUILDSUF=$build_suffix" >> config.mak

 echo "FULLNAME=$FULLNAME" >> config.mak

 echo "LIBPREF=$LIBPREF" >> config.mak

 echo "LIBSUF=$LIBSUF" >> config.mak

 echo "LIBNAME=$LIBNAME" >> config.mak

 echo "SLIBPREF=$SLIBPREF" >> config.mak

 echo "SLIBSUF=$SLIBSUF" >> config.mak
 echo "EXESUF=$EXESUF" >> config.mak

 echo "EXTRA_VERSION=$extra_version" >> config.mak

 echo "DEPEND_CMD=$DEPEND_CMD" >> config.mak

 echo "HOSTCC=$host_cc" >> config.mak
 echo "HOSTCFLAGS=$host_cflags" >> config.mak
 echo "HOSTLDFLAGS=$host_ldflags" >> config.mak
 echo "HOSTLIBS=$host_libs" >> config.mak

 echo "TARGET_EXEC=$target_exec" >> config.mak
 echo "TARGET_PATH=$target_path" >> config.mak

 if enabled bigendian; then

     echo "WORDS_BIGENDIAN=yes" >> config.mak
     echo "#define WORDS_BIGENDIAN 1" >> $TMPH

 fi

 if enabled sdl; then

     echo "SDL_LIBS=`"${SDL_CONFIG}" --libs`" >> config.mak
     echo "SDL_CFLAGS=`"${SDL_CONFIG}" --cflags`" >> config.mak

 fi

 if enabled texi2html; then

     echo "BUILD_DOC=yes" >> config.mak

 fi

 get_version(){
     name=$1
     file=$source_path/$2

     eval $(grep "#define ${name}_VERSION_M" "$file" | awk '{ print $2"="$3 }')
     eval ${name}_VERSION=\$${name}_VERSION_MAJOR.\$${name}_VERSION_MINOR.\$${name}_VERSION_MICRO

     lcname=$(tolower $name)
     eval echo "${lcname}_VERSION=\$${name}_VERSION" >> config.mak
     eval echo "${lcname}_VERSION_MAJOR=\$${name}_VERSION_MAJOR" >> config.mak

 }
 

 get_version LIBSWSCALE  libswscale/swscale.h
 get_version LIBPOSTPROC libpostproc/postprocess.h
 get_version LIBAVCODEC  libavcodec/avcodec.h
 get_version LIBAVDEVICE libavdevice/avdevice.h
 get_version LIBAVFORMAT libavformat/avformat.h
 get_version LIBAVUTIL   libavutil/avutil.h

 get_version LIBAVFILTER libavfilter/avfilter.h

 if enabled shared; then

     echo "BUILD_SHARED=yes" >> config.mak
     echo "PIC=-fPIC -DPIC" >> config.mak

     echo "LIBTARGET=${LIBTARGET}" >> 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_CREATE_DEF_CMD=${SLIB_CREATE_DEF_CMD}" >> config.mak

     echo "SLIB_EXTRA_CMD=${SLIB_EXTRA_CMD}" >> config.mak
     echo "SLIB_INSTALL_EXTRA_CMD=${SLIB_INSTALL_EXTRA_CMD}" >> config.mak
     echo "SLIB_UNINSTALL_EXTRA_CMD=${SLIB_UNINSTALL_EXTRA_CMD}" >> config.mak

 fi

 echo "LIB_INSTALL_EXTRA_CMD=${LIB_INSTALL_EXTRA_CMD}" >> config.mak

 echo "EXTRALIBS=$extralibs" >> config.mak

 echo "ARCH=$arch" >> config.mak
 

 print_config ARCH_   $TMPH config.mak $ARCH_LIST
 print_config HAVE_   $TMPH config.mak $HAVE_LIST

 print_config CONFIG_ $TMPH config.mak $CONFIG_LIST       \

                                       $CONFIG_EXTRA      \

                                       $DECODER_LIST      \
                                       $ENCODER_LIST      \
                                       $PARSER_LIST       \
                                       $BSF_LIST          \
                                       $DEMUXER_LIST      \
                                       $MUXER_LIST        \

                                       $FILTER_LIST       \

                                       $PROTOCOL_LIST     \
                                       $INDEV_LIST        \
                                       $OUTDEV_LIST       \

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

 if enabled small; then

     echo "#define av_always_inline"  >> $TMPH

 fi
 

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

 # Apparently it's not possible to portably echo a backslash.

 enabled asmalign_pot &&

     printf '#define ASMALIGN(ZEROBITS) ".align " #ZEROBITS "\\n\\t"\n' >> $TMPH ||

     printf '#define ASMALIGN(ZEROBITS) ".align 1 << " #ZEROBITS "\\n\\t"\n' >> $TMPH

 echo "#define EXTERN_PREFIX \"${extern_prefix}\"" >> $TMPH

 echo "#endif /* FFMPEG_CONFIG_H */" >> $TMPH
 

 # Do not overwrite an unchanged config.h to avoid superfluous rebuilds.

 cmp -s $TMPH config.h &&
     echo "config.h is unchanged" ||
     mv -f $TMPH config.h

 # build tree in object directory if source path is different from current one

 if enabled source_path_used; then

     DIRS="\

         doc               \
         libavcodec        \
         libavcodec/alpha  \

         libavcodec/arm    \

         libavcodec/bfin   \
         libavcodec/mlib   \
         libavcodec/ppc    \
         libavcodec/sh4    \
         libavcodec/sparc  \

         libavcodec/x86    \

         libavdevice       \

         libavfilter       \

         libavformat       \
         libavutil         \
         libpostproc       \
         libswscale        \
         tests             \
         tools             \
         vhook             \
         "

     FILES="\

         Makefile             \
         common.mak           \

         subdir.mak           \

         doc/texi2pod.pl      \
         libavcodec/Makefile  \

         libavdevice/Makefile \

         libavfilter/Makefile \

         libavformat/Makefile \
         libavutil/Makefile   \
         libpostproc/Makefile \
         libswscale/Makefile  \
         "

     for dir in $DIRS ; do

         mkdir -p $dir

     done
     for f in $FILES ; do

         $ln_s "$source_path/$f" $f

     done
 fi

 # build pkg-config files

 pkgconfig_generate(){
 name=$1

 shortname=${name#lib}${build_suffix}

 comment=$2
 version=$3
 libs=$4
 requires=$5

 cat <<EOF > $name/$name.pc

 prefix=$prefix

 exec_prefix=\${prefix}

 libdir=$libdir

 includedir=$incdir

 Name: $name
 Description: $comment
 Version: $version

 Requires: $(disabled shared && echo $requires)
 Requires.private: $(enabled shared && echo $requires)

 Conflicts:

 Libs: -L\${libdir} -l${shortname} $(disabled shared && echo $libs)
 Libs.private: $(enabled shared && echo $libs)

 Cflags: -I\${includedir}

 EOF

 cat <<EOF > $name/$name-uninstalled.pc

 prefix=
 exec_prefix=

 libdir=\${pcfiledir}

 includedir=${source_path}

 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" "$LIBAVUTIL_VERSION"

 pkgconfig_generate libavcodec "FFmpeg codec library" "$LIBAVCODEC_VERSION" "$extralibs" "libavutil = $LIBAVUTIL_VERSION"
 pkgconfig_generate libavformat "FFmpeg container format library" "$LIBAVFORMAT_VERSION" "$extralibs" "libavcodec = $LIBAVCODEC_VERSION"
 pkgconfig_generate libavdevice "FFmpeg device handling library" "$LIBAVDEVICE_VERSION" "$extralibs" "libavformat = $LIBAVFORMAT_VERSION"

 enabled avfilter &&

     pkgconfig_generate libavfilter "FFmpeg video filtering library" "$LIBAVFILTER_VERSION" "$extralibs" "libavutil = $LIBAVUTIL_VERSION"

 enabled postproc &&

     pkgconfig_generate libpostproc "FFmpeg post processing library" "$LIBPOSTPROC_VERSION"

 if enabled swscale; then

     pkgconfig_generate libswscale "FFmpeg image rescaling library" "$LIBSWSCALE_VERSION" "" "libavutil = $LIBAVUTIL_VERSION"

 else

     pkgconfig_generate libswscale "FFmpeg image rescaling library" "$LIBSWSCALE_VERSION" "" "libavcodec = $LIBAVCODEC_VERSION"

     apply libswscale/libswscale.pc sed s/^Libs:.*$/Libs:/

 fi