configure.ac 207 KB
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dnl Autoconf settings for vlc
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AC_INIT(vlc,0.9.0-svn)
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VERSION_MAJOR="0"
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VERSION_MINOR="9"
VERSION_REVISION="0"
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VERSION_EXTRA="svn"
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CONFIGURE_LINE="`echo "$0 $ac_configure_args" | sed -e 's/\\\/\\\\\\\/g'`"
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CODENAME="Grishenko"
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AC_PREREQ(2.59) dnl this really should be 2.59c
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AC_CONFIG_SRCDIR(src/libvlc.c)
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AC_CONFIG_AUX_DIR(autotools)
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AC_CANONICAL_BUILD
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AC_CANONICAL_HOST
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AM_INIT_AUTOMAKE([1.9 check-news dist-bzip2 no-dist-gzip -Wall])
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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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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_C99
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AC_USE_SYSTEM_EXTENSIONS
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AC_DEFINE([_FORTIFY_SOURCE], 2, [Define to `2' to get glibc warnings.])
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AM_PROG_CC_C_O
AC_PROG_CXX
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AC_PROG_CPP
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AC_PROG_OBJC
_AM_DEPENDENCIES([OBJC])
AC_PROG_EGREP
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AC_PROG_MAKE_SET
AC_PROG_INSTALL
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AM_PROG_AS
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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_CHECK_TOOL(DLLTOOL, dlltool, :)
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dnl Check for compiler properties
AC_C_CONST
AC_C_INLINE
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AC_C_RESTRICT
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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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    AC_MSG_CHECKING([for libs in extras/contrib])
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    topdir="`dirname $0`"
    if test "`echo \"$topdir\" | cut -c 1`" != "/"; then
       topdir="`pwd`/$topdir"
    fi
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   if test "`grep HOST ${topdir}/extras/contrib/config.mak 2>/dev/null|awk '{print $3}'`" != "`$CC -dumpmachine`"; then
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      if test "${with_contrib}" = "yes"; then
        AC_MSG_RESULT([no])
	AC_MSG_ERROR([ not using the libs in extras/contrib as it is not the same host])
      else
        AC_MSG_RESULT([no])
	AC_MSG_WARN([ not using the libs in extras/contrib as it is not the same host])
      fi
     else
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  if test -d ${topdir}/extras/contrib/lib; then
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    AC_MSG_RESULT([yes])
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    export PATH=${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=${topdir}/extras/contrib/lib/pkgconfig
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    fi
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    LDFLAGS="${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
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    if test -z $with_live555_tree; then
       with_live555_tree=${topdir}/extras/contrib/src/live
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    fi
    if test -z $with_goom_tree; then
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       with_goom_tree=${topdir}/extras/contrib/src/goom
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    fi
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    if test -z $with_mozilla_sdk_path; then
       with_mozilla_sdk_path=${topdir}/extras/contrib/gecko-sdk
    fi
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    if test -z $with_cyberlink_tree; then
       with_cyberlink_tree=${topdir}/extras/contrib/src/clinkcc
    fi
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    if test -z $with_libmpeg2_tree; then
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       with_libmpeg2_tree=${topdir}/extras/contrib/src/mpeg2dec
    fi
    if test -z $with_a52_tree; then
       with_a52_tree=${topdir}/extras/contrib/src/a52dec
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    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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  else
     AC_MSG_RESULT([no])
  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="${LDFLAGS}"
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dnl
dnl  Check the operating system
dnl
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case "${host_os}" in
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  "")
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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_LIBS([dvd dvdcss vcd cdda vcdx cddax],[-ldvd])
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    ;;
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  *bsd*)
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    SYS="${host_os}"
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    CFLAGS_save="${CFLAGS_save} -pthread"; CFLAGS="${CFLAGS_save}"
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    case "${host_os}" in
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      freebsd*)
        CPPFLAGS_save="${CPPFLAGS_save} -I/usr/local/include"
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        CPPFLAGS="${CPPFLAGS_save}"
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        LDFLAGS_save="${LDFLAGS_save} -L/usr/local/lib"
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        LDFLAGS="${LDFLAGS_save}"
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        ;;
    esac
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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}"
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    OBJCFLAGS_save="${OBJCFLAGS_save} -D_INTL_REDIRECT_MACROS -std=gnu99"; OBJCFLAGS="${OBJCFLAGS_save}"
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    VLC_ADD_LDFLAGS([mp4], [-Wl,-framework,IOKit,-framework,CoreFoundation])
    VLC_ADD_LDFLAGS([mkv mp4], [-Wl,-framework,IOKit,-framework,CoreFoundation])
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    VLC_ADD_CFLAGS([libvlc vlc],[-x objective-c])
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    VLC_ADD_LDFLAGS([vlc],[-Wl,-undefined,dynamic_lookup])
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    VLC_ADD_LDFLAGS([libvlc_control],[-Wl,dynamic_lookup])
    VLC_ADD_LDFLAGS([ffmpeg i420_rgb_mmx],[-Wl,-read_only_relocs,suppress])
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    VLC_ADD_CFLAGS([motion],[-fconstant-cfstrings])
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    VLC_ADD_LDFLAGS([libvlc],[-Wl,-framework,Cocoa,-framework,CoreFoundation])
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    VLC_ADD_LDFLAGS([motion],[-Wl,-framework,IOKit,-framework,CoreFoundation])
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    AC_ARG_ENABLE(macosx-defaults,
        [  --enable-macosx-defaults Build the default configuration on Mac OS X (default enabled)])
    if test "x${enable_macosx_defaults}" != "xno"
    then
        echo ""
        echo "Building with Mac OS X defaults:"
        enable_faad="yes"
        echo "  Assuming --enable-faad"
        enable_flac="yes"
        echo "  Assuming --enable-flac"
        enable_theora="yes"
        echo "  Assuming --enable-theora"
        enable_shout="yes"
        echo "  Assuming --enable-shout"
        enable_cddax="yes"
        echo "  Assuming --enable-cddax"
        enable_vcdx="yes"
        echo "  Assuming --enable-vcdx"
        enable_caca="yes"
        echo "  Assuming --enable-caca"
        enable_goom="yes"
        echo "  Assuming --enable-goom"
        enable_ncurses="yes"
        echo "  Assuming --enable-ncurses"
        enable_twolame="yes"
        echo "  Assuming --enable-twolame"
        enable_realrtsp="yes"
        echo "  Assuming --enable-realrtsp"

        enable_skins2="no"
        echo "  Assuming --disable-skins2"
        enable_x11="no"
        echo "  Assuming --disable-x11"
        enable_glx="no"
        echo "  Assuming --disable-glx"
        enable_xvideo="no"
        echo "  Assuming --disable-xvideo"

    fi
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    ;;
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  *mingw32* | *cygwin* | *wince* | *mingwce* | *pe*)
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    AC_CHECK_TOOL(WINDRES, windres, :)
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    case "${host_os}" in
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      *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 "${SYS}" = "mingw32"; then
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        # add ws2_32 for closesocket, select, recv
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        VLC_ADD_LIBS([libvlc],[-lws2_32 -lnetapi32 -lwinmm])
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        VLC_ADD_LDFLAGS([vlc],[-mwindows])
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        VLC_ADD_LIBS([activex mozilla],[-lgdi32])
        VLC_ADD_LIBS([cdda vcdx cddax sdl_image],[-lwinmm])
        VLC_ADD_LIBS([access_http access_mms access_udp access_tcp access_ftp access_output_udp access_output_shout sap slp http stream_out_standard stream_out_rtp vod_rtsp access_realrtsp telnet rc netsync gnutls growl flac ts audioscrobbler],[-lws2_32])
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    fi
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    if test "${SYS}" = "mingwce"; then
        # add ws2 for closesocket, select, recv
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        VLC_ADD_CPPFLAGS([libvlc vlc],[-Dmain(a,b)=maince(a,b)])
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        VLC_ADD_LDFLAGS([libvlc vlc],[-e WinMainCRTStartup])
        VLC_ADD_LIBS([libvlc 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_LIBS([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_LIBS([vlc libvlc logger],[-lbe])
    VLC_ADD_LIBS([beos],[-lbe -lmedia -ltranslation -ltracker -lgame])
    VLC_ADD_LIBS([dvdnav dvdread],[-ldl])
    VLC_ADD_LIBS([access_file],[-lpoll])
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    LDFLAGS_save="${LDFLAGS_save} -lintl"; LDFLAGS="${LDFLAGS_save}"
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    dnl Check for BONE
    if test -f /boot/beos/system/lib/libbind.so; then
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        VLC_ADD_LIBS([access_file access_ftp access_mms access_output_udp telnet netsync sap libvlc growl],[-lbind -lsocket])
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    else
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        VLC_ADD_LIBS([access_file access_ftp access_mms access_output_udp telnet netsync sap libvlc 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_LIBS([beos],[-lzeta])
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    fi
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    ;;
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  *)
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    SYS="${host_os}"
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    ;;
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esac
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AM_CONDITIONAL(HAVE_BEOS, test "${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
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dnl Sadly autoconf doesn't think about testing foo.exe when ask to test 
dnl for program foo on win32

case "${build_os}" in
    cygwin|msys)
        ac_executable_extensions=".exe"
 	;;
    *)
 	;;
esac

dnl 
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dnl  Libtool
dnl  It's very bad, but our former custom system was worst
dnl  -- Courmisch
dnl
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dnl override platform specific check for dependent libraries
dnl otherwise libtool linking of shared libraries will
dnl fail on anything other than pass_all.
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AC_CACHE_VAL(lt_cv_deplibs_check_method,
    [lt_cv_deplibs_check_method=pass_all])
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AC_DISABLE_STATIC
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AC_DISABLE_FAST_INSTALL
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AC_LIBTOOL_DLOPEN
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AC_LIBTOOL_WIN32_DLL
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m4_undefine([AC_PROG_F77])
m4_defun([AC_PROG_F77],[])
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AC_PROG_LIBTOOL

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m4_undefine([AC_DEPLIBS_CHECK_METHOD])
m4_defun([AC_DEPLIBS_CHECK_METHOD],[])

lt_cv_deplibs_check_method=pass_all

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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 with the Mac OS X 10.4u SDK],[], with_macosx_sdk=no)
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if test "${with_macosx_sdk}" != "no" ; then
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    CC="${CC} -isysroot /Developer/SDKs/MacOSX10.4u.sdk" 
    CXX="${CXX} -isysroot /Developer/SDKs/MacOSX10.4u.sdk" 
    OBJC="${OBJC} -isysroot /Developer/SDKs/MacOSX10.4u.sdk" 
    LD="${LD} -syslibroot /Developer/SDKs/MacOSX10.4u.sdk"
    CFLAGS_save="${CFLAGS_save} -DMACOSX_DEPLOYMENT_TARGET=10.4 -mmacosx-version-min=10.4"; CFLAGS="${CFLAGS_save}"
    CXXFLAGS_save="${CXXFLAGS_save} -DMACOSX_DEPLOYMENT_TARGET=10.4 -mmacosx-version-min=10.4"; CXXFLAGS="${CXXFLAGS_save}"
    OBJCFLAGS_save="${OBJCFLAGS_save} -DMACOSX_DEPLOYMENT_TARGET=10.4 -mmacosx-version-min=10.4"; OBJCFLAGS="${OBJCFLAGS_save}"
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    MACOSX_DEPLOYMENT_TARGET="10.4"
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    export MACOSX_DEPLOYMENT_TARGET
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fi

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dnl
dnl Gettext stuff
dnl
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AM_GNU_GETTEXT_VERSION(0.16.1)
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AM_GNU_GETTEXT
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AS_IF([test "${nls_cv_force_use_gnu_gettext}" = "yes"], [
  AC_DEFINE(HAVE_INCLUDED_GETTEXT, 1, [Define if we use the local libintl])
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  AM_CPPFLAGS="${AM_CPPFLAGS} -I\$(top_builddir)/intl"
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], [
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  VLC_ADD_LIBS([libvlc vlc], [${LTLIBINTL}])
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])
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dnl
dnl Iconv stuff
dnl
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AS_IF([test "$am_cv_func_iconv" != "yes"],
	[AC_MSG_ERROR([libiconv is needed for VLC to work properly])])
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VLC_ADD_CFLAGS([libvlc],[${INCICONV}])
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VLC_ADD_LIBS([libvlc],[${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_LIBS([libvlc 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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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 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 strlcpy)
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dnl Check for usual libc functions
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AC_CHECK_FUNCS(strdup strndup strnlen 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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AS_IF([test "${SYS}" = "linux"], [
  AC_CHECK_FUNCS(tee)
])

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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_LIBS([libvlc 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_LIBS([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_LIBS([cdda cddax libvlc],[-lnsl])
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  ],[
    AC_CHECK_LIB(bind,gethostbyname,[
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      VLC_ADD_LIBS([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.])
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AC_SEARCH_LIBS([getaddrinfo], [nsl], [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_LIBS([libvlc],[-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_LIBS([libvlc],[-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 "${SYS}" != "mingwce"; then
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AC_TYPE_SIGNAL
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AC_CHECK_LIB(m,cos,[
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  VLC_ADD_LIBS([adjust wave ripple psychedelic gradient a52tofloat32 dtstofloat32 x264 goom visual panoramix rotate noise grain],[-lm])
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])
AC_CHECK_LIB(m,pow,[
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  VLC_ADD_LIBS([ffmpeg ffmpegaltivec stream_out_transrate i420_rgb faad twolame equalizer spatializer param_eq libvlc vorbis freetype mod mpc dmo quicktime realaudio galaktos opengl],[-lm])
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])
AC_CHECK_LIB(m,sqrt,[
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  VLC_ADD_LIBS([headphone_channel_mixer normvol speex mono colorthres extract],[-lm])
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])
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AC_CHECK_LIB(m,ceil,[
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  VLC_ADD_LIBS([mosaic],[-lm])
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])
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AC_CHECK_LIB(m,exp,[
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  VLC_ADD_LIBS([gaussianblur],[-lm])
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])
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AC_CHECK_LIB(mx,sqrtf,[
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  VLC_ADD_LIBS([x264],[-lmx])
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])
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fi # end "${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 "${ac_cv_have_plugins}" = "no"; then
  AC_CHECK_HEADERS(dl.h)
  ac_cv_my_have_shl_load=no
  AC_CHECK_FUNC(shl_load,
   [ac_cv_my_have_shl_load=yes,
    AC_CHECK_LIB(dld, shl_load,
     [ac_cv_my_have_shl_load=yes
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      VLC_ADD_LIBS([libvlc],[-ldld])])])
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  if test "${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_LIBS([libvlc],[-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_LIBS([libvlc],[-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 "${ac_cv_have_plugins}" = "no"; then
  AC_CHECK_HEADERS(dlfcn.h sys/dl.h)
  ac_cv_my_have_dlopen=no
  AC_CHECK_FUNC(dlopen,
    ac_cv_my_have_dlopen=yes,
    AC_CHECK_LIB(dl, dlopen,
      ac_cv_my_have_dlopen=yes
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      VLC_ADD_LIBS([libvlc],[-ldl]),
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      AC_CHECK_LIB(svld, dlopen,
        ac_cv_my_have_dlopen=yes
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        VLC_ADD_LIBS([libvlc],[-lsvld]))))
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  if test "${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_LIBS([libvlc 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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  AC_CHECK_LIB(rt, clock_nanosleep, [
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    VLC_ADD_LIBS([libvlc],[-lrt])
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    AC_DEFINE(HAVE_CLOCK_NANOSLEEP, 1, [Define to 1 if you have clock_nanosleep.])
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  ], [
    dnl HP/UX port
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    AC_CHECK_LIB(rt,sem_init, [VLC_ADD_LIBS([libvlc],[-lrt])])
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  ])
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  have_nanosleep=false
  AC_CHECK_FUNCS(nanosleep,have_nanosleep=:,[
    AC_CHECK_LIB(rt,nanosleep,
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      [VLC_ADD_LIBS([libvlc],[-lrt]) have_nanosleep=:],
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      [AC_CHECK_LIB(posix4,nanosleep,
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          [VLC_ADD_LIBS([libvlc],[-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 locale.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 netinet/in.h sys/socket.h netinet/udplite.h])
AC_CHECK_HEADERS([net/if.h], [], [],
  [
    #if HAVE_SYS_SOCKET_H
    # include <sys/socket.h>
    #endif
  ])
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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 linux/dccp.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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AC_CHECK_TYPE(ssize_t, int)
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AC_SEARCH_LIBS(poll, [poll], [AC_DEFINE(HAVE_POLL, 1, [Define to 1 if the OS is usabl... err, has poll().])])

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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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            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 "${enable_hal}" != "no"
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then
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  PKG_CHECK_MODULES(HAL, hal >= 0.5.0,
    [ AC_DEFINE( HAVE_HAL_1, [] , [Define if you have the new HAL library API])
      AC_DEFINE( HAVE_HAL, [], [Define if you have the HAL library] )
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      VLC_ADD_PLUGINS([hal probe_hal]) 
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      VLC_ADD_LIBS([libvlc hal probe_hal],[$HAL_LIBS])
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      VLC_ADD_CFLAGS([libvlc hal probe_hal],[$HAL_CFLAGS])],   
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    dnl No hal 0.5 Test for 0.2
    [ PKG_CHECK_MODULES( HAL, hal >= 0.2.97, 
       [AC_DEFINE(HAVE_HAL, [], [Define if you have the HAL library])
        VLC_ADD_PLUGINS([hal])
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        VLC_ADD_LIBS([libvlc hal],[$HAL_LIBS])
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        VLC_ADD_CFLAGS([libvlc hal],[$HAL_CFLAGS])],
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       [AC_MSG_WARN(HAL library not found)])
    ]
  )
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fi
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dnl Check for dbus
AC_ARG_ENABLE(dbus,
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  [  --enable-dbus           Linux D-BUS message bus system (default enabled)])
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case "${SYS}" in
    linux*|*bsd*)
if test "${enable_dbus}" != "no"
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then
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  dnl api stable dbus
  PKG_CHECK_MODULES(DBUS, dbus-1 >= 1.0.0,
    [ AC_DEFINE( HAVE_DBUS_3, 1, [Define if you have the D-BUS library API >= 1.0.0] )
      AC_DEFINE( HAVE_DBUS_2, 1, [Define if you have the D-BUS library API >= 0.92] )
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      AC_DEFINE( HAVE_DBUS_1, 1, [Define if you have the D-BUS library API >= 0.30] )
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      AC_DEFINE( HAVE_DBUS, 1, [Define if you have the D-BUS library] )
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      VLC_ADD_LIBS([screensaver libvlc],[$DBUS_LIBS])
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      VLC_ADD_CFLAGS([screensaver libvlc],[$DBUS_CFLAGS])
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      dnl Check for dbus control interface
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        AC_ARG_ENABLE(dbus-control, [  --disable-dbus-control  D-BUS control interface (default enabled)])
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        if test "${enable_dbus_control}" != "no"
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        then
          VLC_ADD_PLUGINS([dbus])
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          VLC_ADD_LIBS([dbus],[$DBUS_LIBS])
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          VLC_ADD_CFLAGS([dbus],[$DBUS_CFLAGS])
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        fi
      dnl Check for Telepathy
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        AC_ARG_ENABLE(telepathy, [  --enable-telepathy      Telepathy Presence plugin through DBus(default enabled)])
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        if test "${enable_telepathy}" != "no"; then
          VLC_ADD_PLUGINS([telepathy])
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          VLC_ADD_LIBS([telepathy],[$DBUS_LIBS])
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          VLC_ADD_CFLAGS([telepathy],[$DBUS_CFLAGS])
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        fi
        dnl Power Management Inhibiter
        VLC_ADD_PLUGINS([inhibit])
        VLC_ADD_LIBS([inhibit],[$DBUS_LIBS])
        VLC_ADD_CFLAGS([inhibit],[$DBUS_CFLAGS])
        ],
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    if ${PKG_CONFIG} --exists dbus-1
    then
      [AC_ARG_ENABLE(old-dbus,
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        [  --enable-old-dbus       Deprecated D-Bus support (default disabled)])]
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      if test "${enable_old_dbus}" != "yes"
      then
        echo ""
        echo "****** WARNING **** WARNING ***** WARNING *************"
        echo "*** Your D-Bus version is < 1.0.0"
        echo "*** You are using old and buggy software and so"
        echo "*** D-Bus support has been disabled."
        echo "*** Please upgrade D-Bus : http://dbus.freedesktop.org"
        echo "*** Alternatively you can force the use of your old and"
        echo "*** buggy D-Bus version by specifying --enable-old-dbus"
        echo "*******************************************************"
        echo ""
      else
        dnl not too old dbus
        [ PKG_CHECK_MODULES(DBUS, dbus-1 >= 0.92,
          [ AC_DEFINE( HAVE_DBUS_2, 1, [Define if you have the D-BUS library API >= 0.92] )
            AC_DEFINE( HAVE_DBUS_1, 1, [Define if you have the D-BUS library API >= 0.30] )
            AC_DEFINE( HAVE_DBUS, 1, [Define if you have the D-BUS library] )
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            VLC_ADD_LIBS([screensaver],[$DBUS_LIBS])
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            VLC_ADD_CFLAGS([screensaver],[$DBUS_CFLAGS])],
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          dnl older dbus
          [ PKG_CHECK_MODULES(DBUS, dbus-1 >= 0.30,
            [ AC_DEFINE( HAVE_DBUS_1, 1, [Define if you have the D-BUS library API >= 0.30 ] )
              AC_DEFINE( HAVE_DBUS, 1, [Define if you have the D-BUS library] )
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              VLC_ADD_LIBS([screensaver],[$DBUS_LIBS])
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              VLC_ADD_CFLAGS([screensaver],[$DBUS_CFLAGS])],
            dnl much older dbus
            [ PKG_CHECK_MODULES( DBUS, dbus-1, 
               [AC_DEFINE(HAVE_DBUS, 1, [Define if you have the D-BUS library])
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                VLC_ADD_LIBS([screensaver],[$DBUS_LIBS])
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                VLC_ADD_CFLAGS([screensaver],[$DBUS_CFLAGS])],
               [AC_MSG_WARN(DBUS library not found)])
            ]
          )]
        )]
      fi
    fi
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  )
fi
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;;
esac
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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="${CFLAGS_save} -Wall -Werror"
     AC_TRY_COMPILE([#include <sys/param.h>],
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        [int meuh; ntohl(meuh);],
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        ac_cv_c_ntohl_sys_param_h=yes, ac_cv_c_ntohl_sys_param_h=no)])
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if test "${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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CFLAGS="${CFLAGS_save}"
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RDC_PROG_CC_WFLAGS([all extra no-unused-parameter sign-compare undef pointer-arith bad-function-cast cast-align write-strings missing-prototypes volatile-register-var])
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RDC_PROG_CC_FLAGS_IFELSE([-pipe])
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dnl This helps detect broken plugins with undefined symbols
dnl Better fail loudly at build-time than silenty at run-time.
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dnl Unfortunately, this sucks on FreeBSD (won't even link with -lc)
dnl RDC_PROG_LINK_FLAGS_IFELSE([-Wl,-z,defs], [
dnl   VLC_ADD_LDFLAGS([plugin],[-Wl,-z,defs])
dnl ])
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dnl Check for various optimization flags
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AC_CACHE_CHECK([if \$CC accepts -Os],
    [ac_cv_c_os],
    [CFLAGS="${CFLAGS_save} -Os"
     AC_TRY_COMPILE([],,ac_cv_c_os=yes, ac_cv_c_os=no)])
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if test "${ac_cv_c_os}" != "no"; then
    CFLAGS_OPTIM_SIZE="${CFLAGS_OPTIM_SIZE} -Os"
else 
    AC_CACHE_CHECK([if \$CC accepts -O],
        [ac_cv_c_o],
        [CFLAGS="${CFLAGS_save} -O"
         AC_TRY_COMPILE([],,ac_cv_c_o=yes, ac_cv_c_o=no)])
    if test "${ac_cv_c_o}" != "no"; then
        if test "${ac_cv_c_o3}" = "no"; then
            CFLAGS_OPTIM_SIZE="${CFLAGS_OPTIM_SIZE} -O"
        fi
    fi
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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 "x${enable_debug}" = "xno"; then
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    CFLAGS_OPTIM_SPEED="${CFLAGS_OPTIM_SPEED} -O3"
else
    AC_CACHE_CHECK([if \$CC accepts -O2],
        [ac_cv_c_o2],
        [CFLAGS="${CFLAGS_save} -O2"
         AC_TRY_COMPILE([],,ac_cv_c_o2=yes, ac_cv_c_o2=no)])
    if test "${ac_cv_c_o2}" != "no"; then
        CFLAGS_OPTIM_SPEED="${CFLAGS_OPTIM_SPEED} -O2"
    else
        AC_CACHE_CHECK([if \$CC accepts -O],
            [ac_cv_c_o],
            [CFLAGS="${CFLAGS_save} -O"
             AC_TRY_COMPILE([],,ac_cv_c_o=yes, ac_cv_c_o=no)])
        if test "${ac_cv_c_o}" != "no"; then
            CFLAGS_OPTIM_SPEED="${CFLAGS_OPTIM_SPEED} -O"
        fi
    fi
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fi

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AC_CACHE_CHECK([if \$CC accepts -O0],
    [ac_cv_c_o0],
    [CFLAGS="${CFLAGS_save} -O0"
     AC_TRY_COMPILE([],,ac_cv_c_o0=yes, ac_cv_c_o0=no)])
if test "${ac_cv_c_o0}" != "no"; then
    CFLAGS_NOOPTIM="${CFLAGS_NOOPTIM} -O0"
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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_SPEED="${CFLAGS_OPTIM_SPEED} -ffast-math"
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fi

dnl Check for -funroll-loops