configure.ac 180 KB
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dnl Autoconf settings for vlc
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AC_INIT(vlc,0.8.5-svn)
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VERSION_MAJOR="0"
VERSION_MINOR="8"
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VERSION_REVISION="5"
VERSION_EXTRA="svn"
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CONFIGURE_LINE="$0 $*"
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CODENAME="Janus"
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AC_PREREQ(2.50)
AC_CONFIG_SRCDIR(src/libvlc.c)
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AC_CONFIG_AUX_DIR(autotools)
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AC_CANONICAL_SYSTEM

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dnl XXX: we don't put any flags here, because automake 1.5 doesn't support
dnl them. And we need the comma otherwize automake will choke on it.
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AM_INIT_AUTOMAKE(vlc,0.8.5-svn)
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AM_CONFIG_HEADER(config.h)

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dnl Too many people are not aware of maintainer mode:
dnl If you want to use it, you definitely know what you are doing, so
dnl you can specify "--disable-maintainer-mode". But if you want the default
dnl automake behavior, you've likely never heard of maintainer mode, so we
dnl can't expect you to enable it manually.

AS_IF([test "x${enable_maintainer_mode}" != "xno"],
	[enable_maintainer_mode="yes"])

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dnl HA! HA!
AM_MAINTAINER_MODE

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dnl
dnl  Save *FLAGS
dnl
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VLC_SAVE_FLAGS
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dnl
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dnl Check for tools
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dnl
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AC_PROG_CC
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AM_PROG_CC_C_O
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AC_PROG_CPP
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AC_PROG_CXX
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eval "${CXX} --version" >/dev/null 2>&1 || CXX=""
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if test "${CXX}" != ""; then
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  AC_PROG_CXXCPP
fi
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AC_PROG_MAKE_SET
AC_PROG_INSTALL
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AM_PROG_AS
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dnl AC_PROG_EGREP only exists in autoconf 2.54+, so we use AC_EGREP_CPP right
dnl now otherwise it might be set in an obscure if statement.
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AC_EGREP_CPP(foo,foo)
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dnl AC_PROG_OBJC doesn't seem to exist, this is the KDE workaround
AC_MSG_CHECKING(for an Objective-C compiler)
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OBJC="${CXX}"
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AC_SUBST(OBJC)
OBJCFLAGS="${CXXFLAGS} -fgnu-runtime -fconstant-string-class=NSConstantString"
AC_SUBST(OBJCFLAGS)
dnl _AM_DEPENDENCIES(OBJC) doesn't work, so hard code OBJCDEPMODE here
#OBJCDEPMODE="depmode=gcc3"
#AC_SUBST(OBJCDEPMODE)
_AM_DEPENDENCIES(OBJC)
AC_MSG_RESULT(not implemented yet)

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dnl Find the right ranlib, even when cross-compiling
AC_CHECK_TOOL(RANLIB, ranlib, :)
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AC_CHECK_TOOL(STRIP, strip, :)
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AC_CHECK_TOOL(AR, ar, :)
AC_CHECK_TOOL(LD, ld, :)
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AC_DISABLE_STATIC
AC_LIBTOOL_DLOPEN
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL

AC_ARG_ENABLE(libtool,
    [  --enable-libtool        use libtool (default disabled, EXPERIMENTAL)],
    [],[enable_libtool="no"])
AM_CONDITIONAL(USE_LIBTOOL, [test "${enable_libtool}" != "no"])
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dnl Check for compiler properties
AC_C_CONST
AC_C_INLINE

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dnl
dnl  Check for the contrib directory
dnl
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AC_ARG_WITH(contrib,
    [  --without-contrib       do not use the libraries in extras/contrib],[],[])
  if test "${with_contrib}" != "no"; then 
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    topdir="`dirname $0`"
    if test "`echo \"$topdir\" | cut -c 1`" != "/"; then
       topdir="`pwd`/$topdir"
    fi

  if test -d ${topdir}/extras/contrib/lib; then
    export PATH=${topdir}/extras/contrib/bin:$PATH
    CPPFLAGS="${CPPFLAGS} -I${topdir}/extras/contrib/include"
    CPPFLAGS_save="${CPPFLAGS_save} -I${topdir}/extras/contrib/include"
    CFLAGS="${CFLAGS} -I${topdir}/extras/contrib/include"
    CFLAGS_save="${CFLAGS_save} -I${topdir}/extras/contrib/include"
    CXXFLAGS="${CXXFLAGS} -I${topdir}/extras/contrib/include"
    CXXFLAGS_save="${CXXFLAGS_save} -I${topdir}/extras/contrib/include"
    OBJCFLAGS="${OBJCFLAGS} -I${topdir}/extras/contrib/include"
    OBJCFLAGS_save="${OBJCFLAGS_save} -I${topdir}/extras/contrib/include"
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    if test $build = $host -o $PKG_CONFIG_LIBDIR; then
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    	export PKG_CONFIG_PATH=${topdir}/extras/contrib/lib/pkgconfig:$PKG_CONFIG_PATH
    else
    	export PKG_CONFIG_LIBDIR=${topdir}/extras/contrib/lib/pkgconfig
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    fi
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    if test -d ${topdir}/extras/contrib/vlc-lib; then
      LDFLAGS="${LDFLAGS} -L${topdir}/extras/contrib/vlc-lib"
      LDFLAGS_save="${LDFLAGS_save} -L${topdir}/extras/contrib/vlc-lib"
    fi
    LDFLAGS="${LDFLAGS} -L${topdir}/extras/contrib/lib"
    LDFLAGS_save="${LDFLAGS_save} -L${topdir}/extras/contrib/lib"
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dnl kludge because only the debian package provides a ffmpeg-config
    if test -z $with_ffmpeg_config_path; then 
       with_ffmpeg_config_path=${topdir}/extras/contrib/bin;
    fi
    if test -z $with_livedotcom_tree; then
       with_livedotcom_tree=${topdir}/extras/contrib/src/live
    fi
    if test -z $with_goom_tree; then
      with_goom_tree=${topdir}/extras/contrib/src/goom
    fi

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    if test ".`uname -s`" = ".Darwin"; then
      export LD_LIBRARY_PATH=${topdir}/extras/contrib/lib:$LD_LIBRARY_PATH
      export DYLD_LIBRARY_PATH=${topdir}/extras/contrib/lib:$DYLD_LIBRARY_PATH
    elif test ".`uname -s`" = ".BeOS"; then
      export LIBRARY_PATH=${topdir}/extras/contrib/lib:$LIBRARY_PATH
      export BELIBRARIES=${topdir}/extras/contrib/lib:$BELIBRARIES
    fi
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  fi
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fi
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dnl
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dnl  Set default values
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dnl
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LDFLAGS_vlc="${LDFLAGS}"
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dnl
dnl  Check the operating system
dnl
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case "${target_os}" in
  "")
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    SYS=unknown
    ;;
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  linux*)
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    SYS=linux
    ;;
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  bsdi*)
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    SYS=bsdi
    CFLAGS_save="${CFLAGS_save} -pthread"; CFLAGS="${CFLAGS_save}"
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    VLC_ADD_LDFLAGS([dvd dvdcss vcd cdda vcdx cddax],[-ldvd])
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    ;;
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  *bsd*)
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    SYS="${target_os}"
    CFLAGS_save="${CFLAGS_save} -pthread"; CFLAGS="${CFLAGS_save}"
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    case "${target_os}" in
      freebsd*)
        CPPFLAGS_save="${CPPFLAGS_save} -I/usr/local/include"
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        CPPFLAGS="${CPPFLAGS_save}"
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        LDFLAGS_save="${LDFLAGS_save} -L/usr/local/lib"
        LDFLAGS="${LDLFAGS_save}"
        ;;
    esac
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    ;;
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  darwin1.[0123])
    dnl Mac OS X < 10.3
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    SYS=darwin
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    CFLAGS_save="${CFLAGS_save} -no-cpp-precomp -D_INTL_REDIRECT_MACROS"; CFLAGS="${CFLAGS_save}"
    CXXFLAGS_save="${CXXFLAGS_save} -no-cpp-precomp -D_INTL_REDIRECT_MACROS"; CXXFLAGS="${CXXFLAGS_save}"
    OBJCFLAGS_save="${OBJCFLAGS_save} -no-cpp-precomp -D_INTL_REDIRECT_MACROS"; OBJCFLAGS="${OBJCFLAGS_save}"
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    VLC_ADD_LDFLAGS([vlc ffmpeg ffmpegaltivec],[-all_load])
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    VLC_ADD_LDFLAGS([mp4], [-framework IOKit -framework CoreFoundation])
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    VLC_ADD_CFLAGS([libvlc],[-x objective-c])
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    VLC_ADD_CFLAGS([vlc],[-x objective-c])
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    VLC_ADD_LDFLAGS([vlc],[-Wl,-m -Wl,-multiply_defined -Wl,suppress])
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    ;;
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  darwin*)
    SYS=darwin
    CFLAGS_save="${CFLAGS_save} -D_INTL_REDIRECT_MACROS"; CFLAGS="${CFLAGS_save}"
    CXXFLAGS_save="${CXXFLAGS_save} -D_INTL_REDIRECT_MACROS"; CXXFLAGS="${CXXFLAGS_save}"
    OBJCFLAGS_save="${OBJCFLAGS_save} -D_INTL_REDIRECT_MACROS"; OBJCFLAGS="${OBJCFLAGS_save}"
    VLC_ADD_LDFLAGS([mp4], [-framework IOKit -framework CoreFoundation])
    VLC_ADD_CFLAGS([libvlc],[-x objective-c])
    VLC_ADD_CFLAGS([vlc],[-x objective-c])
    ;;
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  *mingw32* | *cygwin* | *wince* | *mingwce* | *pe*)
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    AC_CHECK_TOOL(WINDRES, windres, :)
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    case "${target_os}" in
      *mingw32*)
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        SYS=mingw32
        ;;
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      *cygwin*)
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        dnl Check if we are using the mno-cygwin mode in which case we are
        dnl actually dealing with a mingw32 compiler.
        AC_EGREP_CPP(yes,
            [#ifdef WIN32
             yes
             #endif],
            SYS=mingw32, SYS=cygwin)
        ;;
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      *wince* | *mingwce* | *pe*)
        SYS=mingwce
        ;;
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    esac

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    if test "${SYS}" = "mingw32"; then
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        # add ws2_32 for closesocket, select, recv
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        CPPFLAGS_save="${CPPFLAGS_save} -D_OFF_T_ -D_off_t=long"; CPPFLAGS="${CPPFLAGS_save}"
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        VLC_ADD_LDFLAGS([vlc],[-lws2_32 -lnetapi32 -lwinmm -mwindows])
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        VLC_ADD_LDFLAGS([cdda vcdx cddax],[-lwinmm])
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        VLC_ADD_LDFLAGS([ipv4 ipv6 access_http access_mms access_udp access_tcp access_ftp access_output_udp sap slp http stream_out_standard stream_out_rtp vod_rtsp telnet netsync growl],[-lws2_32])
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    fi
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    if test "${SYS}" = "mingwce"; then
        # add ws2 for closesocket, select, recv
        CPPFLAGS_save="${CPPFLAGS_save} -D_OFF_T_ -D_off_t=long"; CPPFLAGS="${CPPFLAGS_save}"
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        VLC_ADD_CPPFLAGS([vlc],[-Dmain(a,b)=maince(a,b)])
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        VLC_ADD_LDFLAGS([vlc],[-lws2 -e WinMainCRTStartup])
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        VLC_ADD_LDFLAGS([ipv4 ipv6 access_http access_mms access_udp access_tcp access_ftp access_output_udp sap http netsync],[-lws2])
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   fi
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    ;;
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  *nto*)
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    SYS=nto
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    VLC_ADD_LDFLAGS([x11 xvideo],[-lsocket])
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    ;;
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  solaris*)
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    SYS=solaris
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    # _POSIX_PTHREAD_SEMANTICS is needed to get the POSIX ctime_r
    # Perhaps it is useful other places as well? 
    CFLAGS_save="${CFLAGS_save} -D_POSIX_PTHREAD_SEMANTICS"; CFLAGS="${CFLAGS_save}"
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    ;;
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  hpux*)
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    SYS=hpux
    ;;
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  beos)
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    SYS=beos
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    CFLAGS_save="${CFLAGS_save} -Wno-multichar"; CFLAGS="${CFLAGS_save}"
    CXXFLAGS_save="${CXXFLAGS_save} -Wno-multichar"; CXXFLAGS="${CXXFLAGS_save}"
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    VLC_ADD_CXXFLAGS([beos],[])
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    VLC_ADD_LDFLAGS([vlc beos logger],[-lbe])
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    VLC_ADD_LDFLAGS([beos],[-lmedia -ltranslation -ltracker -lgame])
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    dnl Check for BONE
    if test -f /boot/beos/system/lib/libbind.so; then
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        VLC_ADD_LDFLAGS([access_file access_ftp access_mms access_output_udp telnet netsync sap ipv4 vlc growl],[-lbind -lsocket])
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    else
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        VLC_ADD_LDFLAGS([access_file access_ftp access_mms access_output_udp telnet netsync sap ipv4 vlc growl],[-lnet])
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    fi
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    dnl Ugly check for Zeta
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    if test -f /boot/beos/system/lib/libzeta.so; then
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        VLC_ADD_LDFLAGS([beos],[-lzeta])
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    fi
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    ;;
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  *)
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    SYS="${target_os}"
    ;;
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esac
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AM_CONDITIONAL(HAVE_BEOS, test "${SYS}" = "beos")
AM_CONDITIONAL(HAVE_DARWIN, test "${SYS}" = "darwin")
AM_CONDITIONAL(HAVE_WIN32, test "${SYS}" = "mingw32")
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AM_CONDITIONAL(HAVE_WINCE, test "${SYS}" = "mingwce")
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dnl
dnl  Check for Mac OS X SDK settings
dnl
AC_ARG_WITH(macosx-sdk,
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   [  --with-macosx-sdk       compile for Mac OS X 10.3 SDK],[], with_macosx_sdk=no)
if test "${with_macosx_sdk}" != "no" ; then
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  CFLAGS_save="${CFLAGS_save} -DMACOSX_DEPLOYMENT_TARGET=10.3 -isysroot /Developer/SDKs/MacOSX10.3.9.sdk"; CFLAGS="${CFLAGS_save}"
  CXXFLAGS_save="${CXXFLAGS_save} -DMACOSX_DEPLOYMENT_TARGET=10.3 -isysroot /Developer/SDKs/MacOSX10.3.9.sdk"; CXXFLAGS="${CXXFLAGS_save}"
  OBJCFLAGS_save="${OBJCFLAGS_save} -DMACOSX_DEPLOYMENT_TARGET=10.3 -isysroot /Developer/SDKs/MacOSX10.3.9.sdk"; OBJCFLAGS="${OBJCFLAGS_save}"
  LDFLAGS_save="${LDFLAGS_save} -isysroot /Developer/SDKs/MacOSX10.3.9.sdk -Wl,-syslibroot,/Developer/SDKs/MacOSX10.3.9.sdk"; LDFLAGS="${LDFLAGS_save}"
  export MACOSX_DEPLOYMENT_TARGET=10.3
  MACOSX_DEPLOYMENT_TARGET="10.3"
fi

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dnl
dnl Gettext stuff
dnl
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ALL_LINGUAS="ca da de en_GB es fr it ja ka ko nl oc pt_BR ro ru sv tr zh_CN zh_TW"
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AM_GNU_GETTEXT_VERSION(0.11.5)
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AM_GNU_GETTEXT
if test "${nls_cv_force_use_gnu_gettext}" = "yes"; then
  AC_DEFINE(HAVE_INCLUDED_GETTEXT, 1, Define if we use the local libintl)
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  INCLUDES="${INCLUDES} -I\$(top_builddir)/intl"
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  AS_IF([test "${enable_libtool}" != "no"], [
    INCLUDED_LIBINTL="${LTLIBINTL}"
  ],[
    INCLUDED_LIBINTL="${LIBINTL}"
  ])
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else
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  VLC_ADD_LDFLAGS([vlc],[${LIBINTL}])
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  INCLUDED_LIBINTL=
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fi
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AC_SUBST(INCLUDED_LIBINTL)
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XGETTEXT="${XGETTEXT} --keyword=_NS --keyword=_ANS"
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dnl
dnl Iconv stuff
dnl
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if test "${SYS}" != "mingwce"; then
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AS_IF([test "$am_cv_func_iconv" != "yes"],
	[AC_MSG_ERROR([libiconv is needed for VLC to work properly])])
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fi
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VLC_ADD_CFLAGS([vlc],[${INCICONV}])
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AS_IF([test "${enable_libtool}" != "no"], [
  VLC_ADD_LDFLAGS([vlc],[${LIBICONV}])
],[
  VLC_ADD_LDFLAGS([vlc],[${LTLIBICONV}])
])
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dnl Check for the need to include the mingwex lib for mingw32
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if test "${SYS}" = "mingw32"
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then
    AC_CHECK_LIB(mingwex,opendir,
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        AC_CHECK_LIB(mingw32,opendir,VLC_ADD_LDFLAGS([vlc],[]),
            [VLC_ADD_LDFLAGS([vlc gtk],[-lmingwex])])
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    )
fi

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dnl Check for fnative-struct or mms-bitfields support for mingw32
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if test "${SYS}" = "mingw32"
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then
    AC_CACHE_CHECK([if \$CC accepts -mms-bitfields],
        [ac_cv_c_mms_bitfields],
        [CFLAGS="${CFLAGS_save} -mms-bitfields"
         AC_TRY_COMPILE([],,ac_cv_c_mms_bitfields=yes, ac_cv_c_mms_bitfields=no)])
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    if test "${ac_cv_c_mms_bitfields}" != "no"; then
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        CFLAGS_save="${CFLAGS_save} -mms-bitfields";
        CXXFLAGS_save="${CXXFLAGS_save} -mms-bitfields";
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    else
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        AC_CACHE_CHECK([if \$CC accepts -fnative-struct],
            [ac_cv_c_fnative_struct],
            [CFLAGS="${CFLAGS_save} -fnative-struct"
             AC_TRY_COMPILE([],,ac_cv_c_fnative_struct=yes, ac_cv_c_fnative_struct=no)])
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        if test "${ac_cv_c_fnative_struct}" != "no"; then
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            CFLAGS_save="${CFLAGS_save} -fnative-struct";
            CXXFLAGS_save="${CXXFLAGS_save} -fnative-struct";
        fi
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    fi

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    CFLAGS="${CFLAGS_save}"; CXXFLAGS="${CXXFLAGS_save}"
fi

dnl Check for fvtable-thunks support for mingw32
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if test "${SYS}" = "mingw32" -a "${CXX}" != ""
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then
AC_LANG_PUSH(C++)
    AC_CACHE_CHECK([if \$CXX accepts -fvtable-thunks],
        [ac_cv_cxx_fvtable_thunks],
        [CXXFLAGS="${CXXFLAGS_save} -Wall -Werror -fvtable-thunks"
         AC_TRY_COMPILE([],,ac_cv_cxx_fvtable_thunks=yes,
                        ac_cv_cxx_fvtable_thunks=no)])
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    if test "${ac_cv_cxx_fvtable_thunks}" = "yes"; then
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        CXXFLAGS_mingw32_special="-fvtable-thunks"
    fi

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    CXXFLAGS_save="${CXXFLAGS_save} ${CXXFLAGS_mingw32_special}"; CXXFLAGS="${CXXFLAGS_save}"
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AC_LANG_POP(C++)
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fi

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dnl Plugin compilation stuff

VLC_LIBRARY_SUFFIX

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VLC_SYMBOL_PREFIX
AC_SUBST(SYMPREF)

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AS_IF([test "${enable_libtool}" = "no"], [
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case "${SYS}" in
  mingw32|cygwin)
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    VLC_ADD_CFLAGS([pic plugin mozilla activex],[${CFLAGS_mingw32_special}])
    VLC_ADD_CXXFLAGS([pic plugin mozilla activex],[${CFLAGS_mingw32_special} ${CXXFLAGS_mingw32_special}])
    VLC_ADD_OBJCFLAGS([pic plugin mozilla activex],[${CFLAGS_mingw32_special}])
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    ;;
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  mingwce)
    ;;
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  *)
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    VLC_ADD_CFLAGS([pic plugin mozilla],[-fpic -fPIC])
    VLC_ADD_CXXFLAGS([pic plugin mozilla],[-fpic -fPIC])
    VLC_ADD_OBJCFLAGS([pic plugin mozilla],[-fpic -fPIC])
    VLC_ADD_LDFLAGS([plugin mozilla],[-fpic -fPIC])
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    ;;
esac
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])
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dnl The -DSYS_FOO flag
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CPPFLAGS_save="${CPPFLAGS_save} -DSYS_`echo ${SYS} | sed -e 's/-.*//' | tr 'abcdefghijklmnopqrstuvwxyz.' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`"; CPPFLAGS="${CPPFLAGS_save}"
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dnl Check for system libs needed
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need_libc=false
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AC_CHECK_FUNCS(gettimeofday select strerror strtod strtol strtof strtoll strtoull strsep isatty vasprintf asprintf swab sigrelse getpwuid memalign posix_memalign if_nametoindex atoll getenv putenv setenv gmtime_r ctime_r localtime_r lrintf daemon scandir fork bsearch lstat)
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dnl Check for usual libc functions
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AC_CHECK_FUNCS(strdup strndup atof)
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AC_CHECK_FUNCS(strcasecmp,,[AC_CHECK_FUNCS(stricmp)])
AC_CHECK_FUNCS(strncasecmp,,[AC_CHECK_FUNCS(strnicmp)])
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AC_CHECK_FUNCS(strcasestr,,[AC_CHECK_FUNCS(stristr)])
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dnl Check for setlocal and langinfo
AC_CHECK_FUNCS(setlocale)
AC_CHECK_HEADERS(langinfo.h)
AC_CHECK_FUNCS(nl_langinfo)

AC_CACHE_CHECK([for nl_langinfo and CODESET], ac_cv_langinfo_codeset,
  [AC_TRY_LINK([#include <langinfo.h>],
    [char* cs = nl_langinfo(CODESET);],
    ac_cv_langinfo_codeset=yes,
    ac_cv_langinfo_codeset=no)
  ])
if test ${ac_cv_langinfo_codeset} = yes; then
  AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
    [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
fi

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AC_CHECK_FUNCS(connect,,[
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  AC_CHECK_LIB(socket,connect,[
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    VLC_ADD_LDFLAGS([vlc ipv4 ipv6 cdda cddax],-lsocket)
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    LIBS_socket="-lsocket"
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  ])
])
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AC_CHECK_FUNCS(send,,[
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  AC_CHECK_LIB(socket,send,[
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    VLC_ADD_LDFLAGS([access_http access_mms access_udp access_tcp access_ftp sap access_output_udp stream_out_standard growl],[-lsocket])
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  ])
])
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AC_CHECK_FUNCS(gethostbyname,,[
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  AC_CHECK_LIB(nsl,gethostbyname,[
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    VLC_ADD_LDFLAGS([cdda cddax ipv4 ipv6 vlc],[-lnsl])
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  ],[
    AC_CHECK_LIB(bind,gethostbyname,[
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      VLC_ADD_LDFLAGS([ipv4 access_mms],[-lbind])
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    ])
  ])
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])
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dnl Check for socklen_t
AC_CACHE_CHECK([for socklen_t], ac_cv_type_socklen_t,
  [AC_TRY_COMPILE(
     [#include <sys/types.h>
      #include <sys/socket.h>],
     [socklen_t len = 42; return len;],
     ac_cv_type_socklen_t=yes,
     ac_cv_type_socklen_t=no)])
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if test "${ac_cv_type_socklen_t}" != "no"; then
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  AC_DEFINE(HAVE_SOCKLEN_T, 1, [Define if <sys/socket.h> defines socklen_t.])
fi

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dnl Check for struct sockaddr_storage
AH_TEMPLATE(sockaddr_storage, [Define to `sockaddr' if <sys/socket.h> does not define.])
AH_TEMPLATE(ss_family, [Define to `sa_family' if <sys/socket.h> does not define.])
AC_CACHE_CHECK([for struct sockaddr_storage], ac_cv_struct_sockaddr_storage,
  [AC_TRY_COMPILE(
    [#include <sys/types.h>
     #if defined( UNDER_CE )
     # include <winsock.h>
     #elif defined( WIN32 )
     # include <winsock2.h>
     #else
     # include <sys/socket.h>
     #endif], [struct sockaddr_storage addr;],
     ac_cv_struct_sockaddr_storage=yes,
     ac_cv_struct_sockaddr_storage=no)])
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AS_IF([test "${ac_cv_struct_sockaddr_storage}" = no], [
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  AC_DEFINE(sockaddr_storage, sockaddr)
  AC_DEFINE(ss_family, sa_family)
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])
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dnl getaddrinfo, getnameinfo and gai_strerror check
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dnl  -lnsl and -lsocket are needed on Solaris;
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dnl  we purposedly make the test fail on Windows
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LIBS_save="${LIBS}"
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AH_TEMPLATE(HAVE_GETADDRINFO, [Define to 1 if you have the `getaddrinfo' function.])
AC_SEARCH_LIBS([getaddrinfo], [-lnsl], [AC_DEFINE(HAVE_GETADDRINFO)],, [${LIBS_socket}])
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dnl NOTE: we assume getaddrinfo will be present if getnameinfo or gai_strerro
dnl are
LIBS="${LIBS_gai}"
AC_CHECK_FUNCS([getnameinfo gai_strerror])
LIBS="${LIBS_save}"

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AH_TEMPLATE(HAVE_ADDRINFO, [Define to 1 if <netdb.h> defines `struct addrinfo'.])
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AC_CHECK_TYPES([struct addrinfo],[AC_DEFINE(HAVE_ADDRINFO)],,
[#include <sys/types.h>
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#if defined( WIN32 ) || defined( UNDER_CE )
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# if defined(UNDER_CE) && defined(sockaddr_storage)
#  undef sockaddr_storage
# endif
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# include <winsock2.h>
# include <ws2tcpip.h>
#else
# include <netdb.h>
#endif])
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dnl Check for va_copy
AC_CACHE_CHECK([for va_copy], ac_cv_c_va_copy,
  AC_TRY_LINK(
    [#include <stdarg.h>],
    [va_list ap1, ap2; va_copy(ap1,ap2);],
    [ac_cv_c_va_copy="yes"],
    [ac_cv_c_va_copy="no"]))
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if test "${ac_cv_c_va_copy}" = "yes"; then
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  AC_DEFINE(HAVE_VA_COPY, 1, [Define if <stdarg.h> defines va_copy.])
fi
AC_CACHE_CHECK([for __va_copy], ac_cv_c___va_copy,
  AC_TRY_LINK(
    [#include <stdarg.h>],
    [va_list ap1, ap2; __va_copy(ap1,ap2);],
    [ac_cv_c___va_copy="yes"],
    [ac_cv_c___va_copy="no"]))
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if test "${ac_cv_c___va_copy}" = "yes"; then
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  AC_DEFINE(HAVE___VA_COPY, 1, [Define if <stdarg.h> defines __va_copy.])
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fi

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AC_CHECK_FUNCS(inet_aton,,[
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  AC_CHECK_LIB(resolv,inet_aton,[
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    VLC_ADD_LDFLAGS([ipv4 vlc],[-lresolv])
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  ])
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])
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dnl Check for getopt (always use builtin one on win32)
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if test "${SYS}" = "mingw32" -o "${SYS}" = "mingwce"; then
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need_getopt=:
else
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need_getopt=false
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AC_CHECK_FUNCS(getopt_long,[AC_DEFINE(HAVE_GETOPT_LONG,1,long getopt support)],
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[ # FreeBSD has a gnugetopt library for this:
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  AC_CHECK_LIB([gnugetopt],[getopt_long],
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    [AC_DEFINE(HAVE_GETOPT_LONG,1,getopt support)
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     VLC_ADD_LDFLAGS([vlc],[-lgnugetopt])],
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    [need_getopt=:])])
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fi
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AM_CONDITIONAL(BUILD_GETOPT, ${need_getopt})
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if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
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AC_TYPE_SIGNAL
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AC_CHECK_LIB(m,cos,[
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  VLC_ADD_LDFLAGS([adjust distort a52tofloat32 dtstofloat32 x264 goom],[-lm])
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])
AC_CHECK_LIB(m,pow,[
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  VLC_ADD_LDFLAGS([ffmpeg ffmpegaltivec stream_out_transrate i420_rgb faad twolame equalizer param_eq vlc freetype mpc],[-lm])
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])
AC_CHECK_LIB(m,sqrt,[
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  VLC_ADD_LDFLAGS([headphone_channel_mixer normvol speex],[-lm])
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])
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AC_CHECK_LIB(mx,sqrtf,[
  VLC_ADD_LDFLAGS([x264],[-lmx])
])
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fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
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dnl Check for dynamic plugins
ac_cv_have_plugins=no

# OS X style
AC_CHECK_HEADERS(mach-o/dyld.h,
  [AC_CHECK_FUNCS(NSLinkModule,
    [AC_DEFINE(HAVE_DL_DYLD, 1, [Define if you have the Darwin dyld API])
     ac_cv_have_plugins=yes])])

# HP-UX style
if test "${ac_cv_have_plugins}" = "no"; then
  AC_CHECK_HEADERS(dl.h)
  ac_cv_my_have_shl_load=no
  AC_CHECK_FUNC(shl_load,
   [ac_cv_my_have_shl_load=yes,
    AC_CHECK_LIB(dld, shl_load,
     [ac_cv_my_have_shl_load=yes
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      VLC_ADD_LDFLAGS([vlc],[-ldld])])])
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  if test "${ac_cv_my_have_shl_load}" = "yes"; then
    AC_DEFINE(HAVE_DL_SHL_LOAD, 1, [Define if you have the shl_load API])
    ac_cv_have_plugins=yes
  fi
fi

# Whatever style
if test "${ac_cv_have_plugins}" = "no"; then
  AC_CHECK_LIB(dld, dld_link,
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   [VLC_ADD_LDFLAGS([vlc],[-ldld])
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    AC_DEFINE(HAVE_DL_DLD_LINK, 1, [Define if you have the GNU dld library])
    ac_cv_have_plugins=yes])
fi

# Win32 style
if test "${ac_cv_have_plugins}" = "no"; then
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  if test "${SYS}" = "mingw32" -o "${SYS}" = "cygwin"; then
    AC_CHECK_LIB(kernel32, main,
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     [VLC_ADD_LDFLAGS([vlc],[-lkernel32])
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      AC_DEFINE(HAVE_DL_WINDOWS, 1, [Define if you have Windows' LoadLibrary])
      ac_cv_have_plugins=yes])
  fi
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fi

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# WinCE style
if test "${ac_cv_have_plugins}" = "no"; then
  if test "${SYS}" = "mingwce"; then
    AC_DEFINE(HAVE_DL_WINDOWS, 1, [Define if you have Windows' LoadLibrary])
    ac_cv_have_plugins=yes
  fi
fi

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# BeOS style
if test "${ac_cv_have_plugins}" = "no"; then
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  AC_CHECK_HEADERS(image.h)
  AC_CHECK_FUNCS(load_add_on,
   [AC_DEFINE(HAVE_DL_BEOS, 1, [Define if you have the BeOS dl])
    ac_cv_have_plugins=yes])
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fi

# Only test for dlopen() if the others didn't work
if test "${ac_cv_have_plugins}" = "no"; then
  AC_CHECK_HEADERS(dlfcn.h sys/dl.h)
  ac_cv_my_have_dlopen=no
  AC_CHECK_FUNC(dlopen,
    ac_cv_my_have_dlopen=yes,
    AC_CHECK_LIB(dl, dlopen,
      ac_cv_my_have_dlopen=yes
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      VLC_ADD_LDFLAGS([vlc],[-ldl]),
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      AC_CHECK_LIB(svld, dlopen,
        ac_cv_my_have_dlopen=yes
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        VLC_ADD_LDFLAGS([vlc],[-lsvld]))))
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  if test "${ac_cv_my_have_dlopen}" = "yes"; then
    AC_DEFINE(HAVE_DL_DLOPEN, 1, [Define if you have the dlopen API])
    ac_cv_have_plugins=yes
  fi
fi

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if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
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dnl Check for pthreads - borrowed from XMMS
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THREAD_LIB=error
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if test "${THREAD_LIB}" = "error"; then
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  AC_CHECK_LIB(pthread,main,THREAD_LIB="-lpthread")
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fi
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if test "${THREAD_LIB}" = "error"; then
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  AC_CHECK_LIB(pthreads,main,THREAD_LIB="-lpthreads")
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fi
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if test "${THREAD_LIB}" = "error"; then
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  AC_CHECK_LIB(c_r,main,THREAD_LIB="-lc_r")
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fi
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if test "${THREAD_LIB}" = "error"; then
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  AC_CHECK_FUNCS(pthread_mutex_lock)
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  THREAD_LIB=""
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fi
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dnl Check for cthreads under GNU/Hurd for instance
AC_CHECK_LIB(threads,cthread_fork,THREAD_LIB="-lthreads")
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dnl
dnl  GNU portable threads
dnl
AC_ARG_ENABLE(pth,
  [  --enable-pth            GNU Pth support (default disabled)],
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  [ if test "${enable_pth}" = "yes"; then
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    AC_CHECK_LIB(pth,pth_init)
    AC_MSG_CHECKING(for pth_init in pth.h)
    AC_EGREP_HEADER(pth_init,pth.h,[
      AC_MSG_RESULT(yes)
      AC_DEFINE(PTH_INIT_IN_PTH_H, 1,
                Define if <pth.h> defines pth_init)
      THREAD_LIB="-lpth"
    ],[
      AC_MSG_RESULT(no)
    ])
    fi
])

dnl
dnl  State Threads
dnl
AC_ARG_ENABLE(st,
  [  --enable-st             State Threads (default disabled)],
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  [ if test "${enable_st}" = "yes"; then
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    AC_CHECK_LIB(st,st_init)
    AC_MSG_CHECKING(for st_init in st.h)
    AC_EGREP_HEADER(st_init,st.h,[
      AC_MSG_RESULT(yes)
      AC_DEFINE(ST_INIT_IN_ST_H, 1,
                Define if <st.h> defines st_init)
      THREAD_LIB="-lst"
    ],[
      AC_MSG_RESULT(yes)
    ])
    fi
])

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VLC_ADD_LDFLAGS([vlc plugin],[${THREAD_LIB}])
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dnl Don't link with rt when using GNU-pth
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if test "${THREAD_LIB}" != "-lpth" && test "${THREAD_LIB}" != "-lst"; then
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  dnl HP/UX port
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  AC_CHECK_LIB(rt,sem_init, [VLC_ADD_LDFLAGS([vlc],[-lrt])])
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  have_nanosleep=false
  AC_CHECK_FUNCS(nanosleep,have_nanosleep=:,[
    AC_CHECK_LIB(rt,nanosleep,
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      [VLC_ADD_LDFLAGS([vlc],[-lrt]) have_nanosleep=:],
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      [AC_CHECK_LIB(posix4,nanosleep,
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          [VLC_ADD_LDFLAGS([vlc],[-lposix4]) have_nanosleep=:])]
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    )
  ])
  if ${have_nanosleep}; then
    AC_DEFINE(HAVE_NANOSLEEP, 1,
              Define if nanosleep is available.)
  fi
fi

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dnl Check for misc headers
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AC_MSG_CHECKING(for pthread_cond_t in pthread.h)
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AC_EGREP_HEADER(pthread_cond_t,pthread.h,[
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  AC_MSG_RESULT(yes)
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  AC_DEFINE(PTHREAD_COND_T_IN_PTHREAD_H, 1,
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            Define if <pthread.h> defines pthread_cond_t.)],[
  AC_MSG_RESULT(no)])

AC_MSG_CHECKING(for pthread_once in pthread.h)
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AC_EGREP_HEADER(pthread_once,pthread.h,[
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  AC_MSG_RESULT(yes)
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  AC_DEFINE(PTHREAD_ONCE_IN_PTHREAD_H, 1,
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            Define if <pthread.h> defines pthread_once.)],[
  AC_MSG_RESULT(no)])
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fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
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AC_MSG_CHECKING(for strncasecmp in strings.h)
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AC_EGREP_HEADER(strncasecmp,strings.h,[
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  AC_MSG_RESULT(yes)
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  AC_DEFINE(STRNCASECMP_IN_STRINGS_H, 1,
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            Define if <strings.h> defines strncasecmp.)],[
  AC_MSG_RESULT(no)])
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dnl Check for headers
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AC_CHECK_HEADERS(signal.h time.h errno.h stdint.h stdbool.h getopt.h strings.h inttypes.h sys/int_types.h wchar.h)
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AC_CHECK_HEADERS(sys/sockio.h fcntl.h sys/types.h sys/time.h sys/times.h sys/ioctl.h sys/stat.h)
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AC_CHECK_HEADERS(arpa/inet.h net/if.h netinet/in.h sys/socket.h)
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if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
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AC_CHECK_HEADERS(machine/param.h sys/shm.h)
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AC_CHECK_HEADERS(linux/version.h)
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AC_CHECK_HEADERS(syslog.h)
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fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
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AC_HEADER_TIME

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dnl Check for dirent
need_dirent=false
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AC_CHECK_HEADERS(dirent.h,,[need_dirent=:])
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AM_CONDITIONAL(BUILD_DIRENT, ${need_dirent})

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dnl Mac OS X and other OSes don't have declaration for nanosleep
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if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
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AC_MSG_CHECKING(for nanosleep in time.h)
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AC_EGREP_HEADER(nanosleep,time.h,[
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  AC_MSG_RESULT(yes)
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  AC_DEFINE(HAVE_DECL_NANOSLEEP, 1,
            Define if <time.h> defines nanosleep.)
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],[
  AC_MSG_RESULT(no)
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])
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fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
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dnl Make sure we have timespecs
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AC_MSG_CHECKING(for timespec in sys/time.h)
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AC_EGREP_HEADER(timespec,sys/time.h,[
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  AC_MSG_RESULT(yes)
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  AC_DEFINE(HAVE_STRUCT_TIMESPEC, 1,
            Define if <sys/time.h> defines struct timespec.)
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],[
  AC_MSG_RESULT(no)
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])
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dnl Check for threads library
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if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
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AC_CHECK_HEADERS(cthreads.h pthread.h kernel/scheduler.h kernel/OS.h)
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fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
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dnl Find where are the X headers and libraries
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AC_PATH_XTRA()
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dnl it seems that autoconf do the pkg-config detection only for the first PKG_CHECK_MODULES in the configure.ac ( which is logical) but in our case it is nested in a if so it was not working if you're not on linux or have disable hal.

PKG_PROG_PKG_CONFIG()

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dnl Check for hal
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AC_ARG_ENABLE(hal,
  [  --enable-hal            Linux HAL services discovery (default enabled)])
 
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if test "${enable_hal}" != "no" -a "${SYS}" = "linux"
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then
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  PKG_CHECK_MODULES(HAL, hal >= 0.5.0,
    [ AC_DEFINE( HAVE_HAL_1, [] , [Define if you have the new HAL library API])
      AC_DEFINE( HAVE_HAL, [], [Define if you have the HAL library] )
      VLC_ADD_PLUGINS([hal]) 
      VLC_ADD_LDFLAGS([vlc hal],[$HAL_LIBS])
      VLC_ADD_CFLAGS([vlc hal],[$HAL_CFLAGS])],   
    dnl No hal 0.5 Test for 0.2
    [ PKG_CHECK_MODULES( HAL, hal >= 0.2.97, 
       [AC_DEFINE(HAVE_HAL, [], [Define if you have the HAL library])
        VLC_ADD_PLUGINS([hal])
        VLC_ADD_LDFLAGS([vlc hal],[$HAL_LIBS])
        VLC_ADD_CFLAGS([vlc hal],[$HAL_CFLAGS])],
       [AC_MSG_WARN(HAL library not found)])
    ]
  )
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fi
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dnl Build the gtk_main plugins?
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NEED_GTK_MAIN=no
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NEED_GNOME_MAIN=no
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NEED_GTK2_MAIN=no
NEED_GNOME2_MAIN=no
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dnl build the qte plugin ?
NEED_QTE_MAIN=no

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dnl Check for ntohl, etc.
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AC_CACHE_CHECK([for ntohl in sys/param.h],
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    [ac_cv_c_ntohl_sys_param_h],
    [CFLAGS="${CFLAGS_save} -Wall -Werror"
     AC_TRY_COMPILE([#include <sys/param.h>],
        [void foo() { int meuh; ntohl(meuh); }],
        ac_cv_c_ntohl_sys_param_h=yes, ac_cv_c_ntohl_sys_param_h=no)])
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if test "${ac_cv_c_ntohl_sys_param_h}" != "no"; then
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    AC_DEFINE(NTOHL_IN_SYS_PARAM_H, 1, Define if <sys/param.h> defines ntohl.)
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fi
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# XXX: do this with an M4 macro?
#dnl Check for various -W flags
#for flag in "" all unreachable-code conversion sign-compare disabled-optimization
#do
#    AC_CACHE_CHECK([if \$CC accepts -W${flag}],
#        [ac_cv_c_W${flag}],
#        [CFLAGS="-W${flag} ${CFLAGS_save}"
#         AC_TRY_COMPILE([],,ac_cv_c_W${flag}=yes, ac_cv_c_W${flag}=no)])
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#    if test "${ac_cv_c_W${flag}}" != "no"; then
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#        CFLAGS_save="-W${flag} ${CFLAGS_save}"; CFLAGS="${CFLAGS_save}"
#        CXXFLAGS_save="-W${flag} ${CFLAGS_save}"; CXXFLAGS="${CXXFLAGS_save}"
#        OBJCFLAGS_save="-W${flag} ${OBJCFLAGS_save}"; OBJCFLAGS="${OBJCFLAGS_save}"
#    fi
#done

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AC_CACHE_CHECK([if \$CC accepts -Wall],
    [ac_cv_c_Wall],
    [CFLAGS="-Wall ${CFLAGS_save}"
     AC_TRY_COMPILE([],,ac_cv_c_Wall=yes, ac_cv_c_Wall=no)])

AC_CACHE_CHECK([if \$CC accepts -Wconversion],
    [ac_cv_c_Wconversion],
    [CFLAGS="-Wconversion ${CFLAGS_save}"
     AC_TRY_COMPILE([],,ac_cv_c_Wconversion=yes, ac_cv_c_Wconversion=no)])

AC_CACHE_CHECK([if \$CC accepts -Wunreachable-code],
    [ac_cv_c_Wunreachable_code],
    [CFLAGS="-Wunreachable-code ${CFLAGS_save}"
     AC_TRY_COMPILE([],,ac_cv_c_Wunreachable_code=yes, ac_cv_c_Wunreachable_code=no)])

AC_CACHE_CHECK([if \$CC accepts -Wsign-compare],
    [ac_cv_c_Wsign_compare],
    [CFLAGS="-Wsign-compare ${CFLAGS_save}"
     AC_TRY_COMPILE([],,ac_cv_c_Wsign_compare=yes, ac_cv_c_Wsign_compare=no)])

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if test "${ac_cv_c_Wall}" != "no"; then
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    CFLAGS_save="-Wall ${CFLAGS_save}"; CFLAGS="${CFLAGS_save}"
    CXXFLAGS_save="-Wall ${CFLAGS_save}"; CXXFLAGS="${CXXFLAGS_save}"
    OBJCFLAGS_save="-Wall ${OBJCFLAGS_save}"; OBJCFLAGS="${OBJCFLAGS_save}"
fi
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if test "${ac_cv_c_Wsign_compare}" != "no"; then
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    CFLAGS_save="-Wsign-compare ${CFLAGS_save}"; CFLAGS="${CFLAGS_save}"
    CXXFLAGS_save="-Wsign-compare ${CFLAGS_save}"; CXXFLAGS="${CXXFLAGS_save}"
    OBJCFLAGS_save="-Wsign-compare ${OBJCFLAGS_save}"; OBJCFLAGS="${OBJCFLAGS_save}"
fi

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dnl Check for -pipe
AC_CACHE_CHECK([if \$CC accepts -pipe],
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    [ac_cv_c_pipe],
    [CFLAGS="${CFLAGS_save} -pipe"
     AC_TRY_COMPILE([],,ac_cv_c_pipe=yes, ac_cv_c_pipe=no)])
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if test "${ac_cv_c_pipe}" != "no"; then
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    CFLAGS_save="${CFLAGS_save} -pipe"; CFLAGS="${CFLAGS_save}"
    CXXFLAGS_save="${CXXFLAGS_save} -pipe"; CXXFLAGS="${CXXFLAGS_save}"
    OBJCFLAGS_save="${OBJCFLAGS_save} -pipe"; OBJCFLAGS="${OBJCFLAGS_save}"
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fi

dnl Check for various optimization flags
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AC_CACHE_CHECK([if \$CC accepts -Os],
    [ac_cv_c_os],
    [CFLAGS="${CFLAGS_save} -Os"
     AC_TRY_COMPILE([],,ac_cv_c_os=yes, ac_cv_c_os=no)])
if test "${ac_cv_c_os}" != "no" -a "${target_cpu}" = "mipsel"; then
    CFLAGS_OPTIM="${CFLAGS_OPTIM} -Os"
fi

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AC_CACHE_CHECK([if \$CC accepts -O3],
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    [ac_cv_c_o3],
    [CFLAGS="${CFLAGS_save} -O3"
     AC_TRY_COMPILE([],,ac_cv_c_o3=yes, ac_cv_c_o3=no)])
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if test "${ac_cv_c_o3}" != "no" -a "${target_cpu}" != "mipsel"; then
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    CFLAGS_OPTIM="${CFLAGS_OPTIM} -O3"
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fi

AC_CACHE_CHECK([if \$CC accepts -O2],
    [ac_cv_c_o2],
    [CFLAGS="${CFLAGS_save} -O2"
     AC_TRY_COMPILE([],,ac_cv_c_o2=yes, ac_cv_c_o2=no)])
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if test "${ac_cv_c_o2}" != "no" -a "${target_cpu}" != "mipsel"; then
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    if test "${ac_cv_c_o3}" = "no"; then
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        CFLAGS_OPTIM="${CFLAGS_OPTIM} -O2"
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    fi
    CFLAGS_NOOPTIM="${CFLAGS_NOOPTIM} -O2"
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else 
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    AC_CACHE_CHECK([if \$CC accepts -O],
        [ac_cv_c_o],
        [CFLAGS="${CFLAGS_save} -O"
         AC_TRY_COMPILE([],,ac_cv_c_o=yes, ac_cv_c_o=no)])
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    if test "${ac_cv_c_o}" != "no" -a "${target_cpu}" != "mipsel"; then
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        if test "${ac_cv_c_o3}" = "no"; then
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            CFLAGS_OPTIM="${CFLAGS_OPTIM} -O"
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	fi
        CFLAGS_NOOPTIM="${CFLAGS_NOOPTIM} -O"
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    fi
fi

dnl Check for -ffast-math
AC_CACHE_CHECK([if \$CC accepts -ffast-math],
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    [ac_cv_c_fast_math],
    [CFLAGS="${CFLAGS_save} -ffast-math"
     AC_TRY_COMPILE([],,ac_cv_c_fast_math=yes, ac_cv_c_fast_math=no)])
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if test "${ac_cv_c_fast_math}" != "no"; then
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    CFLAGS_OPTIM="${CFLAGS_OPTIM} -ffast-math"
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fi

dnl Check for -funroll-loops
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dnl Disabled on BeOS because BeOS' gcc is buggy and may crash with it
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if test "${SYS}" != "beos"
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then
  AC_CACHE_CHECK([if \$CC accepts -funroll-loops],
      [ac_cv_c_unroll_loops],
      [CFLAGS="${CFLAGS_save} -funroll-loops"
       AC_TRY_COMPILE([],,ac_cv_c_unroll_loops=yes, ac_cv_c_unroll_loops=no)])
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  if test "${ac_cv_c_unroll_loops}" != "no"; then
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      CFLAGS_OPTIM="${CFLAGS_OPTIM} -funroll-loops"
  fi
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fi

dnl Check for -fomit-frame-pointer
AC_CACHE_CHECK([if \$CC accepts -fomit-frame-pointer],
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    [ac_cv_c_omit_frame_pointer],
    [CFLAGS="${CFLAGS_save} -fomit-frame-pointer"
     AC_TRY_COMPILE([],,ac_cv_c_omit_frame_pointer=yes, ac_cv_c_omit_frame_pointer=no)])
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if test "${ac_cv_c_omit_frame_pointer}" != "no"; then
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    CFLAGS_OPTIM_NODEBUG="${CFLAGS_OPTIM_NODEBUG} -fomit-frame-pointer"
    # this plugin does not compile without -fomit-frame-pointer, damn gcc!
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    VLC_ADD_CFLAGS([i420_yuy2_mmx],[-fomit-frame-pointer])
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fi

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dnl Check for -mdynamic-no-pic
AC_CACHE_CHECK([if \$CC accepts -mdynamic-no-pic],
    [ac_cv_c_dynamic_no_pic],
    [CFLAGS="${CFLAGS_save} -mdynamic-no-pic"
     AC_TRY_COMPILE([],,ac_cv_c_dynamic_no_pic=yes, ac_cv_c_dynamic_no_pic=no)])
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AS_IF([test "${enable_libtool}" = "no" && test "${ac_cv_c_dynamic_no_pic}" != "no"], [
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    VLC_ADD_CFLAGS([builtin],[-mdynamic-no-pic])
    VLC_ADD_CFLAGS([libvlc],[-mdynamic-no-pic])
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])
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dnl Check for Darwin plugin linking flags
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AC_CACHE_CHECK([if \$CC accepts -bundle -undefined error],
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    [ac_cv_ld_darwin],
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    [CFLAGS="${CFLAGS_save} -bundle -undefined error"