configure.ac 127 KB
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dnl Autoconf settings for vlc
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AC_COPYRIGHT([Copyright 2002-2012 VLC authors and VideoLAN])
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AC_INIT(vlc, 2.1.0-git)
VERSION_MAJOR=2
VERSION_MINOR=1
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VERSION_REVISION=0
VERSION_EXTRA=0
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VERSION_DEV=git
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PKGDIR="vlc"
AC_SUBST(PKGDIR)
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CONFIGURE_LINE="`echo "$0 $ac_configure_args" | sed -e 's/\\\/\\\\\\\/g'`"
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CODENAME="Rincewind"
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COPYRIGHT_YEARS="1996-2012"
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AC_CONFIG_SRCDIR(src/libvlc.c)
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AC_CONFIG_AUX_DIR(autotools)
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AC_CONFIG_MACRO_DIR(m4)
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AC_CONFIG_LIBOBJ_DIR(compat)
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AC_CANONICAL_BUILD
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AC_CANONICAL_HOST
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AC_PRESERVE_HELP_ORDER
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AM_INIT_AUTOMAKE(tar-ustar color-tests)
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AM_CONFIG_HEADER(config.h)

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# Disable with "./configure --disable-silent-rules" or "make V=1"
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AM_SILENT_RULES([yes])
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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"],
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    [enable_maintainer_mode="yes"])
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AM_MAINTAINER_MODE

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dnl
dnl Directories
dnl
dnl vlcincludedir="\${includedir}/\${PKGDIR}"
dnl AC_SUBST(vlcincludedir)
vlcdatadir="\${datadir}/\${PKGDIR}"
AC_SUBST(vlcdatadir)
vlclibdir="\${libdir}/\${PKGDIR}"
AC_SUBST(vlclibdir)

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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.])
AC_DEFINE([_FILE_OFFSET_BITS], 64, [Define to 64 for large files support.])
AC_DEFINE([_REENTRANT],, [Define to expose reentrant functions.])
AC_DEFINE([_THREAD_SAFE],, [Same as _REENTANT for some other OSes.])
AC_DEFINE([__LIBVLC__],, [Define within the LibVLC source code tree.])
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AC_DEFINE([WIN32_LEAN_AND_MEAN],, [Define to limit the scope of <windows.h>.])
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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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AC_ARG_VAR([DESKTOP_FILE_VALIDATE], [Validator for desktop entry files])
AC_CHECK_PROGS(DESKTOP_FILE_VALIDATE, [${DESKTOP_FILE_VALIDATE} desktop-file-validate], :)

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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 Extend the --help string at the current spot.
AC_DEFUN([EXTEND_HELP_STRING], [m4_divert_once([HELP_ENABLE], [$1])])

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dnl Allow binary package maintainer to pass a custom string to avoid
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dnl cache problem
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AC_ARG_WITH(binary-version,
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    AS_HELP_STRING([--with-binary-version=STRING],
         [To avoid plugins cache problem between binary version]),[],[])
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AS_IF([test -n "${with_binary_version}"],[
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    AC_DEFINE_UNQUOTED([DISTRO_VERSION],["${with_binary_version}"],
         [Binary specific version])
])
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dnl
dnl  Check the operating system
dnl
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HAVE_WIN64="0"
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case "${host_os}" in
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  "")
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    SYS=unknown
    ;;
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  linux*)
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    SYS=linux
    ;;
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  bsdi*)
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    SYS=bsdi
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    CFLAGS="${CFLAGS} -pthread"
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    VLC_ADD_LIBS([vcd cdda vcdx],[-ldvd])
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    ;;
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  freebsd*)
    SYS=freebsd
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    CFLAGS="${CFLAGS} -pthread"
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    CPPFLAGS="${CPPFLAGS} -I/usr/local/include"
    LDFLAGS="${LDFLAGS} -L/usr/local/lib"
    ;;
  openbsd*)
    SYS=openbsd
    CPPFLAGS="${CPPFLAGS} -I/usr/local/include -I/usr/X11R6/include"
    LDFLAGS="${LDFLAGS} -L/usr/local/lib -L/usr/X11R6/lib/"
    ;;
  netbsd*)
    SYS=netbsd
    ;;
  dragonfly*)
    SYS=dragonfly
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    ;;
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  darwin*)
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    dnl Force gcc "-arch" flag
    ARCH_flag=""
    case "${host}" in
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      i?86*)
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        ARCH_flag="-arch i386"
      ;;
      ppc64*)
        ARCH_flag="-arch ppc64"
      ;;
      ppc*)
        ARCH_flag="-arch ppc"
      ;;
      x86_64*)
        ARCH_flag="-arch x86_64"
      ;;
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      arm*)
        ARCH_flag="-arch armv7"
        ac_cv_c_bigendian="no"
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        ac_cv_c_attribute_packed="no"
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      ;;
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    esac

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    SYS=darwin
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    CFLAGS="${CFLAGS} -D_INTL_REDIRECT_MACROS ${ARCH_flag}"
    CXXFLAGS="${CXXFLAGS} -D_INTL_REDIRECT_MACROS ${ARCH_flag}"
    CPPFLAGS="${CPPFLAGS} ${ARCH_flag}"
    OBJCFLAGS="${OBJCFLAGS} -D_INTL_REDIRECT_MACROS -std=gnu99 ${ARCH_flag}"
    LDFLAGS="${LDFLAGS} -Wl,-headerpad_max_install_names ${ARCH_flag}"
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    VLC_ADD_LIBS([mkv mp4 motion], [-Wl,-framework,IOKit,-framework,CoreFoundation])
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    VLC_ADD_LIBS([libvlc vlc],[-Wl,-undefined,dynamic_lookup,-framework,Appkit])
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    VLC_ADD_LIBS([avcodec avformat access_avio swscale postproc i420_rgb_mmx x264 x26410b],[-Wl,-read_only_relocs,suppress])
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    VLC_ADD_CFLAGS([motion],[-fconstant-cfstrings])
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    VLC_ADD_LIBS([libvlccore],[-Wl,-framework,CoreFoundation])
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    dnl Allow binaries created on Lion to run on earlier releases
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    AC_EGREP_CPP(yes,
           [#import <Cocoa/Cocoa.h>
            #ifdef MAC_OS_X_VERSION_10_7
            yes
            #endif],
            [AC_MSG_RESULT([yes])
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            AC_LIBOBJ([getdelim])
            AC_LIBOBJ([strndup])
            AC_LIBOBJ([strnlen])],)
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    dnl
    dnl  Check for Mac OS X SDK settings
    dnl
    AC_ARG_WITH(macosx-sdk,
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      [AS_HELP_STRING([--with-macosx-sdk=DIR],
        [compile using the SDK in DIR])])
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    test "${with_macosx_sdk}" = "" && with_macosx_sdk=/Developer/SDKs/MacOSX10.6.sdk
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    test ! -d "${with_macosx_sdk}" && AC_MSG_ERROR([SDK "${with_macosx_sdk}" not found])
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    AC_ARG_WITH(macosx-version-min,
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      [AS_HELP_STRING([--with-macosx-version-min=VERSION],
        [compile for MacOS X VERSION and above])])
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    if test "${with_macosx_version_min}" = "" ; then
       with_macosx_version_min=10.5
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    fi
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    MACOSX_DEPLOYMENT_TARGET=${with_macosx_version_min}
    CPP="${CPP} -isysroot ${with_macosx_sdk} -mmacosx-version-min=${with_macosx_version_min}"
    CC="${CC} -isysroot ${with_macosx_sdk} -mmacosx-version-min=${with_macosx_version_min}"
    CXX="${CXX} -isysroot ${with_macosx_sdk} -mmacosx-version-min=${with_macosx_version_min}"
    OBJC="${OBJC} -isysroot ${with_macosx_sdk} -mmacosx-version-min=${with_macosx_version_min}"
    LD="${LD} -syslibroot ${with_macosx_sdk} -mmacosx_version_min=${with_macosx_version_min}"
    CFLAGS="${CFLAGS} -DMACOSX_DEPLOYMENT_TARGET=${with_macosx_version_min}"
    CXXFLAGS="${CXXFLAGS} -DMACOSX_DEPLOYMENT_TARGET=${with_macosx_version_min}"
    OBJCFLAGS="${OBJCFLAGS} -DMACOSX_DEPLOYMENT_TARGET=${with_macosx_version_min}"
    export MACOSX_DEPLOYMENT_TARGET
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    ;;
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  *mingw32* | *cygwin* | *wince* | *mingwce*)
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    AC_CHECK_TOOL(WINDRES, windres, :)
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    AC_CHECK_TOOL(OBJCOPY, objcopy, :)
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    AC_DEFINE([_WIN32_WINNT], 0x0502, [Define to '0x0502' for Windows XP SP2 APIs.])
    AC_DEFINE([_WIN32_IE], 0x0600, [Define to '0x0600' for IE 6.0 (and shell) APIs.])
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    case "${host_os}" in
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      *wince* | *mingwce* | *mingw32ce*)
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        SYS=mingwce
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        dnl Sadly CeGCC still needs non-wince macros
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        ;;
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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],
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            SYS=mingw32, AC_MSG_ERROR([VLC requires -mno-cygwin]))
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        ;;
    esac

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    if test "${SYS}" = "mingw32"; then
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        VLC_ADD_LIBS([libvlccore],[-lnetapi32 -lwinmm])
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        VLC_ADD_LDFLAGS([vlc],[-mwindows])
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        VLC_ADD_LIBS([win32text],[-lgdi32])
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        VLC_ADD_LIBS([cdda vcdx sdl_image vout_sdl],[-lwinmm])
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        AC_CHECK_PROGS(U2D, [unix2dos todos], unix2dos)
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        ac_default_prefix="`pwd`/_win32"
        DESTDIR="`pwd`/_win32/"
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        dnl
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        dnl NSIS Installer prefix and WIN64
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        dnl
        case "${host}" in
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            amd64*|x86_64*)
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                HAVE_WIN64="1"
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                PROGRAMFILES="PROGRAMFILES64"
            ;;
            *)
                PROGRAMFILES="PROGRAMFILES"
            ;;
        esac
        AC_SUBST(PROGRAMFILES)

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    fi
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    if test "${SYS}" = "mingwce"; then
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        VLC_ADD_LIBS([libvlccore],[-lmmtimer])
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        AC_CHECK_PROGS(U2D, [unix2dos todos], unix2dos)
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        ac_default_prefix="`pwd`/_wince"
        DESTDIR="`pwd`/_wince/"
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    fi
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    ;;
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  *nto*)
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    SYS=nto
    ;;
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  solaris*)
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    SYS=solaris
    ;;
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  hpux*)
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    SYS=hpux
    ;;
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  symbian*)
    SYS=symbian
    ;;
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  *os2*)
    SYS=os2
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    LDFLAGS="${LDFLAGS} -Zomf -Zbin-files -Zargs-wild"
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    ;;
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  *)
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    SYS="${host_os}"
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    ;;
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esac
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AM_CONDITIONAL(HAVE_DARWIN,  test "${SYS}" = "darwin")
AM_CONDITIONAL(HAVE_LINUX,   test "${SYS}" = "linux")
AM_CONDITIONAL(HAVE_OS2,     test "${SYS}" = "os2")
AM_CONDITIONAL(HAVE_WIN32,   test "${SYS}" = "mingw32")
AM_CONDITIONAL(HAVE_WIN64,   test "${HAVE_WIN64}" = "1")
AM_CONDITIONAL(HAVE_WINCE,   test "${SYS}" = "mingwce")
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AM_CONDITIONAL(HAVE_SYMBIAN, test "${SYS}" = "symbian")
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dnl
dnl  Check for the contrib directory
dnl
AC_ARG_WITH(contrib,
  [AS_HELP_STRING([--with-contrib[=DIR]],
    [search for 3rd party libraries in DIR/include and DIR/lib])
])
AC_MSG_CHECKING([for 3rd party libraries path])
AS_IF([test -z "${with_contrib}" || test "${with_contrib}" = "yes"], [
  CONTRIB_DIR="${srcdir}/contrib/${host}"
  AS_IF([test ! -d "${CONTRIB_DIR}"], [
    echo "${CONTRIB_DIR} not found" >&AS_MESSAGE_LOG_FD
    CONTRIB_DIR="${srcdir}/contrib/`$CC -dumpmachine`"
    AS_IF([test ! -d "${CONTRIB_DIR}"], [
      echo "${CONTRIB_DIR} not found" >&AS_MESSAGE_LOG_FD
      CONTRIB_DIR="${srcdir}/extras/contrib/hosts/${host}"
      AS_IF([test ! -d "${CONTRIB_DIR}"], [
        echo "${CONTRIB_DIR} not found" >&AS_MESSAGE_LOG_FD
        CONTRIB_DIR="${srcdir}/extras/contrib/hosts/`$CC -dumpmachine`"
        AS_IF([test ! -d "${CONTRIB_DIR}"], [
          echo "${CONTRIB_DIR} not found" >&AS_MESSAGE_LOG_FD
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          CONTRIB_DIR=""
          AC_MSG_RESULT([not found])
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        ])
      ])
    ])
  ])
], [
  AS_IF([test "${with_contrib}" != "no"], [
    CONTRIB_DIR="${with_contrib}"
  ], [
    CONTRIB_DIR=""
    AC_MSG_RESULT([disabled])
  ])
])
AS_IF([test -n "${CONTRIB_DIR}"], [
  AS_IF([test -d "${CONTRIB_DIR}/lib"],[
    CONTRIB_DIR=`cd "${CONTRIB_DIR}" && pwd`
  ], [
    echo "${CONTRIB_DIR}/lib not found" >&AS_MESSAGE_LOG_FD
    CONTRIB_DIR=""
    AC_MSG_RESULT([not usable])
  ])

])
AS_IF([test -n "${CONTRIB_DIR}"], [
  AC_MSG_RESULT([${CONTRIB_DIR}])
  export PATH=${CONTRIB_DIR}/bin:$PATH
  CPPFLAGS="${CPPFLAGS} -I${CONTRIB_DIR}/include"
  CFLAGS="${CFLAGS} -I${CONTRIB_DIR}/include"
  CXXFLAGS="${CXXFLAGS} -I${CONTRIB_DIR}/include"
  OBJCFLAGS="${OBJCFLAGS} -I${CONTRIB_DIR}/include"
  AS_IF([test "$build" = "$host" -o "$PKG_CONFIG_LIBDIR"], [
    export PKG_CONFIG_PATH="${CONTRIB_DIR}/lib/pkgconfig:$PKG_CONFIG_PATH"
  ], [
    export PKG_CONFIG_LIBDIR="${CONTRIB_DIR}/lib/pkgconfig"
  ])
  LDFLAGS="${LDFLAGS} -L${CONTRIB_DIR}/lib"

  AS_IF([test "${SYS}" = "darwin"], [
    export LD_LIBRARY_PATH="${CONTRIB_DIR}/lib:$LD_LIBRARY_PATH"
    export DYLD_LIBRARY_PATH="${CONTRIB_DIR}/lib:$DYLD_LIBRARY_PATH"
  ])
], [
  AS_IF([test -n "${with_contrib}" && test "${with_contrib}" != "no"], [
    AC_MSG_ERROR([Third party libraries not found!])
  ])
])
AC_SUBST(CONTRIB_DIR)

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dnl
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dnl Sadly autoconf does not think about testing foo.exe when ask to test
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dnl for program foo on win32

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

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dnl Android is linux, but a bit different
AS_IF([test "$SYS" = linux],[
    AC_MSG_CHECKING([for an Android system])
    AC_PREPROC_IFELSE([AC_LANG_PROGRAM(
        [[#ifndef __ANDROID__
         # error Not Android
         #endif
        ]],[[;]])
    ],[
      HAVE_ANDROID="1"
      AC_MSG_RESULT([yes])
    ],[
      AC_MSG_RESULT([no])
    ])
])
AM_CONDITIONAL(HAVE_ANDROID, test "${HAVE_ANDROID}" = "1")

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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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LT_INIT([dlopen win32-dll shared disable-static])
LT_LANG([C++])
LT_LANG([Windows Resource])
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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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AS_IF([test "${enable_shared}" = "no" -a "${enable_vlc}" != "no"], [
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  AC_MSG_ERROR([VLC is based on plugins. Shared libraries cannot be disabled.])
])

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dnl
dnl Gettext stuff
dnl
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AM_GNU_GETTEXT_VERSION([0.18.1])
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AM_GNU_GETTEXT([external], [need-ngettext])
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dnl
dnl Iconv stuff
dnl
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AM_ICONV
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dnl Check for broken versions of mingw-runtime compatability library
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AS_IF([test "${SYS}" = "mingw32" -o "${SYS}" = "mingwce"], [
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    AC_MSG_CHECKING(for broken mingw-runtime)
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    AC_PREPROC_IFELSE([AC_LANG_SOURCE([
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#include <_mingw.h>
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#if defined(__MINGW64_VERSION_MAJOR)
# if __MINGW64_VERSION_MAJOR < 3
#  error Attempting to use mingw-runtime with broken vsnprintf and direct2d support
# endif
#elif __MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION < 15
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# error Attempting to use mingw-runtime with broken vsnprintf support
#endif
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    ])], [
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        AC_MSG_RESULT([ok])
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    ], [
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        AC_MSG_RESULT([present])
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        AC_MSG_ERROR([LibVLC requires mingw-runtime version 3.15 or higher, or mingw-w64 version 3.0 or higher!])
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    ])
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    dnl force use of mingw provided c99 *printf over msvcrt
    CPPFLAGS="${CPPFLAGS} -D__USE_MINGW_ANSI_STDIO=1"
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])
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dnl Check for the need to include the mingwex lib for mingw32
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if test "${SYS}" = "mingw32" ; then
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    AC_CHECK_LIB(mingwex,opendir,
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        AC_CHECK_LIB(mingw32,opendir,,
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            [VLC_ADD_LIBS([libvlccore],[-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 "${SYS}" = "mingw32" ; then
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    VLC_SAVE_FLAGS
    CFLAGS="${CFLAGS} -mms-bitfields"
    CXXFLAGS="${CXXFLAGS} -mms-bitfields"
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    AC_CACHE_CHECK([if \$CC accepts -mms-bitfields],
        [ac_cv_c_mms_bitfields],
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        [AC_TRY_COMPILE([],,ac_cv_c_mms_bitfields=yes, ac_cv_c_mms_bitfields=no)])
    if test "${ac_cv_c_mms_bitfields}" = "no"; then
        VLC_RESTORE_FLAGS
        CFLAGS="${CFLAGS} -fnative-struct"
        CXXFLAGS="${CXXFLAGS} -fnative-struct"
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        AC_CACHE_CHECK([if \$CC accepts -fnative-struct],
            [ac_cv_c_fnative_struct],
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            [AC_TRY_COMPILE([],,ac_cv_c_fnative_struct=yes, ac_cv_c_fnative_struct=no)])
        "${ac_cv_c_fnative_struct}" = "no" && VLC_RESTORE_FLAGS
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    fi
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fi

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dnl
dnl Buggy glibc prevention. Purposedly not cached.
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dnl See sourceware.org bugs 5058 and 5443.
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dnl Ubuntu alone has 20 bug numbers for this...
dnl
AC_MSG_CHECKING(for buggy GNU/libc versions)
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AC_PREPROC_IFELSE([AC_LANG_SOURCE([
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#include <limits.h>
#if defined (__GLIBC__) && (__GLIBC__ == 2) \
  && (__GLIBC_MINOR__ >= 5) && (__GLIBC_MINOR__ <= 7)
# error GNU/libc with dcgettext killer bug!
#endif
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])], [
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  AC_MSG_RESULT([not present])
], [
  AC_MSG_RESULT([found])
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  AS_IF([test "x${enable_nls}" != "xno"], [
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    AC_MSG_ERROR([Buggy GNU/libc (version 2.5 - 2.7) present. VLC would crash; there is no viable
work-around for this. Check with your distribution vendor on how to update the
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glibc run-time. Alternatively, build with --disable-nls.])
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  ])
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])

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dnl Plugin compilation stuff

VLC_LIBRARY_SUFFIX

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dnl Check for system libs needed
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need_libc=false
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dnl Check for usual libc functions
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AC_CHECK_DECLS([nanosleep],,,[#include <time.h>])
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AC_CHECK_FUNCS([daemon fcntl fstatvfs fork getenv getpwuid_r isatty lstat memalign mmap openat pread posix_fadvise posix_madvise setlocale stricmp strnicmp strptime uselocale])
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AC_REPLACE_FUNCS([atof atoll dirfd fdopendir flockfile fsync getdelim getpid gmtime_r inet_pton lldiv localtime_r nrand48 poll posix_memalign rewind setenv strcasecmp strcasestr strdup strlcpy strncasecmp strndup strnlen strsep strtof strtok_r strtoll swab tdestroy strverscmp])
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AC_CHECK_FUNCS(fdatasync,,
  [AC_DEFINE(fdatasync, fsync, [Alias fdatasync() to fsync() if missing.])
])
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dnl mingw64 implements those as static inline, not functions with C linkage
AC_LINK_IFELSE([
    AC_LANG_PROGRAM([#include <stdio.h>], [
        char *c;
        if (asprintf(&c, "%s %d", "string", 1) == -1)
            c = NULL;
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    ])],[AC_DEFINE([HAVE_ASPRINTF],[1],[Define to 1 if you have asprintf function])],[AC_LIBOBJ([asprintf])])
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AC_LINK_IFELSE([
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    AC_LANG_PROGRAM([#include <stdio.h>
                     #include <stdarg.h>], [
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        char *c;
        va_list ap;
        if (vasprintf(&c, "%s %d", ap) == -1)
            c = NULL;
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    ])],[AC_DEFINE([HAVE_VASPRINTF],[1],[Define to 1 if you have asprintf function])],[AC_LIBOBJ([vasprintf])])
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dnl C11 static_assert()
AC_MSG_CHECKING([for static_assert in assert.h])
AC_PREPROC_IFELSE([AC_LANG_SOURCE([
#include <assert.h>
#ifndef static_assert
# error BOOM!
#endif
])], [
  AC_MSG_RESULT([yes])
  AC_DEFINE([HAVE_STATIC_ASSERT], [1], [Define to 1 if <assert.h> defines static_assert.])
], [
  AC_MSG_RESULT([no])
])

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# Windows CE does not have strcoll()
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AC_FUNC_STRCOLL

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dnl Check for non-standard system calls
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AC_CHECK_FUNCS([accept4 pipe2 eventfd vmsplice sched_getaffinity])
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AH_BOTTOM([#include <vlc_fixups.h>])

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dnl Check for struct pollfd
AC_CHECK_TYPES([struct pollfd],,,
[#include <sys/types.h>
#if HAVE_POLL
# include <poll.h>
#elif defined (WIN32)
# include <winsock2.h>
#endif
])

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dnl Checks for socket stuff
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VLC_SAVE_FLAGS
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SOCKET_LIBS=""
AC_SEARCH_LIBS(connect, [socket], [
  AS_IF([test "$ac_cv_search_connect" != "none required"], [
    SOCKET_LIBS="$ac_cv_search_connect"
  ])
], [
  AS_IF([test "${SYS}" = "mingw32"], [
    SOCKET_LIBS="-lws2_32"
  ])
  AS_IF([test "${SYS}" = "mingwce"], [
    SOCKET_LIBS="-lws2"
  ])
])
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AC_SEARCH_LIBS([getaddrinfo], [nsl], [
 AS_IF([test "$ac_cv_search_getaddrinfo" != "none required"], [
    SOCKET_LIBS="$ac_cv_search_getaddrinfo $SOCKET_LIBS"
  ])
],, [${SOCKET_LIBS}])

AC_CHECK_FUNCS([if_nameindex if_nametoindex])
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VLC_RESTORE_FLAGS
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AS_IF([test -n "$SOCKET_LIBS"], [
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  VLC_ADD_LIBS([access_http access_mms access_udp access_tcp access_ftp access_rtmp access_output_udp access_output_shout sap stream_out_select stream_out_standard stream_out_rtp stream_out_raop vod_rtsp access_realrtsp rtp oldrc netsync gnutls flac ts audioscrobbler lua remoteosd zvbi audiobargraph_a netsync stream_filter_dash],[${SOCKET_LIBS}])
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])
AC_SUBST(SOCKET_LIBS)
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dnl Check for socklen_t
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AH_TEMPLATE(socklen_t, [Define to `int' if <sys/socket.h> does not define.])
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AC_CACHE_CHECK([for socklen_t in sys/socket.h], dnl ` (fix VIM syntax highlight
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ac_cv_type_socklen_t,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
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[#include <sys/types.h>
#ifdef WIN32
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# include <winsock2.h>
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# include <ws2tcpip.h>
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#else
# include <sys/socket.h>
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#endif]], [[socklen_t len; len = 0;]])],
ac_cv_type_socklen_t=yes,
ac_cv_type_socklen_t=no)])
AS_IF([test "$ac_cv_type_socklen_t" = no],
 [AC_DEFINE(socklen_t, int)])
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dnl Check for struct sockaddr_storage
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AH_TEMPLATE(sockaddr_storage, [Define to `sockaddr' if <sys/socket.h> does not define.]) dnl ` (fix VIM syntax highlight
AH_TEMPLATE(ss_family, [Define to `sa_family' if <sys/socket.h> does not define.]) dnl ` (fix VIM syntax highlight
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AC_CACHE_CHECK([for struct sockaddr_storage], ac_cv_struct_sockaddr_storage,
  [AC_TRY_COMPILE(
    [#include <sys/types.h>
     #if defined( UNDER_CE )
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     # include <winsock2.h>
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     #elif defined( WIN32 )
     # include <winsock2.h>
     #else
     # include <sys/socket.h>
     #endif], [struct sockaddr_storage addr;],
     ac_cv_struct_sockaddr_storage=yes,
     ac_cv_struct_sockaddr_storage=no)])
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AS_IF([test "${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 FreeBSD has a gnugetopt library for this:
GNUGETOPT_LIBS=""
AC_CHECK_FUNC(getopt_long,, [
  AC_CHECK_LIB([gnugetopt],[getopt_long], [
    GNUGETOPT_LIBS="-lgnugetopt"
  ])
])
AC_SUBST(GNUGETOPT_LIBS)
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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 scene kate flac lua chorus_flanger freetype avcodec avformat access_avio swscale postproc i420_rgb faad twolame equalizer spatializer param_eq samplerate freetype mpc dmo mp4 quicktime qt4 compressor headphone_channel_mixer normvol audiobargraph_a speex mono colorthres extract ball access_imem hotkeys mosaic gaussianblur dbus x26410b hqdn3d anaglyph oldrc ncurses],[-lm])
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  LIBM="-lm"
], [
  LIBM=""
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])
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AC_SUBST(LIBM)
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AC_CHECK_LIB(m,lrintf, [
  AC_DEFINE(HAVE_LRINTF, 1, [Define to 1 if you have the lrintf function])
  VLC_ADD_LIBS([skins2],[-lm])
])

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643
dnl Check for dynamic plugins
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LIBDL=""
have_dynamic_objects="no"
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VLC_SAVE_FLAGS
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AC_SEARCH_LIBS(dlopen, [dl svld], [
  AS_IF([test "$ac_cv_search_dlopen" != "none required"], [
    LIBDL="$ac_cv_search_dlopen"
  ])
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  have_dynamic_objects="yes"
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])
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VLC_RESTORE_FLAGS
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# Windows
AS_IF([test "${SYS}" = "mingw32" -o "${SYS}" = "mingwce"], [
  LIBDL=""
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  have_dynamic_objects="yes" #assume we can use shared objects
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])
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test "${enable_shared}" = "no" && have_dynamic_objects=no

AS_IF([test "${have_dynamic_objects}" != "no"], [
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  AC_DEFINE(HAVE_DYNAMIC_PLUGINS, 1,
            [Define to 1 if dynamic plugins are supported.])
], [
  dnl Clear $LIBDL so as not to break linking
  LIBDL=""
])
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AM_CONDITIONAL(HAVE_DYNAMIC_PLUGINS, [test "${have_dynamic_objects}" != "no"])

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AC_SUBST(LIBDL)
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VLC_ADD_LIBS([lua],[$LIBDL])
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674

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dnl Check for thread library
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if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
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  VLC_SAVE_FLAGS
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  LIBS=""
  AC_SEARCH_LIBS(pthread_rwlock_init, pthread pthreads c_r, [
    VLC_ADD_LIBS([libvlccore libvlc vlc plugin],[${LIBS}])
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  ])
  VLC_RESTORE_FLAGS
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  AC_CHECK_LIB(rt, clock_nanosleep, [
    VLC_ADD_LIBS([libvlccore],[-lrt])
  ], [
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    AC_CHECK_FUNC(nanosleep,,[
      AC_CHECK_LIB(rt,nanosleep, [
        VLC_ADD_LIBS([libvlccore],[-lrt])
      ], [
        AC_CHECK_LIB(posix4,nanosleep, [
          VLC_ADD_LIBS([libvlccore],[-lposix4])
        ])
      ])
    ])
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    dnl HP/UX port
    AC_CHECK_LIB(rt,sem_init, [VLC_ADD_LIBS([libvlccore],[-lrt])])
  ])
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fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
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dnl Check for headers
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AC_CHECK_HEADERS([search.h])
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AC_CHECK_HEADERS(getopt.h locale.h xlocale.h)
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AC_CHECK_HEADERS([sys/time.h sys/ioctl.h])
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AC_CHECK_HEADERS([arpa/inet.h netinet/udplite.h sys/eventfd.h])
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AC_CHECK_HEADERS([net/if.h], [], [],
  [
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    #include <sys/types.h>
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    #include <sys/socket.h>
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  ])
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AC_CHECK_HEADERS([sys/mount.h], [], [],
  [
    #include <sys/param.h>
  ])
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if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
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  AC_CHECK_HEADERS(machine/param.h sys/shm.h)
  AC_CHECK_HEADERS([linux/version.h linux/dccp.h scsi/scsi.h linux/magic.h])
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  AC_CHECK_HEADERS(syslog.h mntent.h)
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fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
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dnl LP64 and LLP64 architectures had better define ssize_t by themselves...
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724
AH_TEMPLATE(ssize_t, [Define to `int' if <stddef.h> does not define.]) dnl ` (fix VIM syntax highlight
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AC_CHECK_TYPE(ssize_t,, [
  AC_DEFINE(ssize_t, int)
])

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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(pthread.h)
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fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
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dnl It seems that autoconf detects pkg-config only during the first
dnl PKG_CHECK_MODULES from configure.ac - which makes sense. But in our case,
dnl it is nested within a conditional block, so it was not working right.
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dnl Make PKG_CONFIG_PATH precious so that it appears in the help and get saved
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AC_ARG_VAR(PKG_CONFIG_PATH,
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       [Paths where to find .pc not at the default location])
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PKG_PROG_PKG_CONFIG()

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dnl On some OS we need static linking
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AS_IF([test -n "${PKG_CONFIG}" ],[
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    AS_IF([test "${SYS}" = "mingw32" -o "${SYS}" = "mingwce" -o "${SYS}" = "darwin" -o "${SYS}" = "os2" ],[
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        PKG_CONFIG="${PKG_CONFIG} --static"
    ])
])
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dnl
dnl Check for zlib.h and -lz along with system -lminizip if available
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dnl
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AC_CHECK_HEADERS(zlib.h, [ have_zlib=yes ], [ have_zlib=no ])
AM_CONDITIONAL(HAVE_ZLIB, [ test "${have_zlib}" = "yes" ])
if test "${have_zlib}" = "yes"
then
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  VLC_ADD_LIBS([access_http mp4 skins2 sap mkv unzip zip],[-lz])
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  PKG_CHECK_MODULES([MINIZIP], [minizip] , [ have_minizip=yes ], [
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    AC_CHECK_HEADERS([unzip.h], [
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      have_minizip=yes
      MINIZIP_LIBS="-lminizip -lz"
    ], [
      have_minizip=no
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      MINIZIP_CFLAGS="-I\\\${top_srcdir}/modules/access/zip/unzip"
      MINIZIP_LIBS="\\\${top_builddir}/modules/access/zip/unzip/libunzip.la"
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    ])
  ])
  VLC_ADD_CPPFLAGS([skins2],[$MINIZIP_CFLAGS])
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  VLC_ADD_LIBS([skins2],[$MINIZIP_LIBS])
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fi
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AM_CONDITIONAL(HAVE_MINIZIP, [ test "${have_minizip}" = "yes" ])
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dnl Check for dbus
AC_ARG_ENABLE(dbus,
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  [AS_HELP_STRING([--enable-dbus],
    [compile D-Bus message bus support (default enabled)])])
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case "${SYS}" in
    linux*|*bsd*)
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if test "${enable_dbus}" != "no" -a "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
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then
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  dnl api stable dbus
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  PKG_CHECK_MODULES(DBUS, [dbus-1 >= 1.0.0],
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    [ AC_DEFINE( HAVE_DBUS, 1, [Define if you have the D-BUS library] )
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      VLC_ADD_LIBS([libvlccore],[$DBUS_LIBS])
      VLC_ADD_CFLAGS([libvlccore],[$DBUS_CFLAGS])
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      dnl Check for dbus control interface
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        AC_ARG_ENABLE(dbus-control,
          [AS_HELP_STRING([--disable-dbus-control],
            [D-Bus control interface (default enabled)])])
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        if test "${enable_dbus_control}" != "no"
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        then
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          VLC_ADD_PLUGIN([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,
          AS_HELP_STRING([--enable-telepathy],[Telepathy Presence plugin through DBus(default enabled)]))
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        if test "${enable_telepathy}" != "no"; then
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          VLC_ADD_PLUGIN([telepathy])
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          VLC_ADD_LIBS([telepathy],[$DBUS_LIBS])
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          VLC_ADD_CFLAGS([telepathy],[$DBUS_CFLAGS])
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        fi
        dnl Power Management Inhibiter
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        VLC_ADD_PLUGIN([inhibit])
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        VLC_ADD_LIBS([inhibit],[$DBUS_LIBS])
        VLC_ADD_CFLAGS([inhibit],[$DBUS_CFLAGS])
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    ],
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    [AC_MSG_ERROR([${DBUS_PKG_ERRORS}.])]
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  )
fi
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;;
esac
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dnl Check for ntohl, etc.
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VLC_SAVE_FLAGS
CFLAGS="${CFLAGS} -Wall -Werror"
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AC_CACHE_CHECK([for ntohl in sys/param.h],
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    [ac_cv_c_ntohl_sys_param_h],
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    [     AC_TRY_COMPILE([#include <sys/param.h>],
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        [int meuh; ntohl(meuh);],
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        ac_cv_c_ntohl_sys_param_h=yes, ac_cv_c_ntohl_sys_param_h=no)])
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if test "${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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VLC_RESTORE_FLAGS
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EXTEND_HELP_STRING([Optimization options:])
dnl
dnl  Compiler warnings
dnl
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RDC_PROG_CC_WFLAGS([all extra sign-compare undef pointer-arith bad-function-cast write-strings missing-prototypes volatile-register-var error-implicit-function-declaration])
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RDC_PROG_CC_FLAGS([-pipe])
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AC_LANG_PUSH([C++])
RDC_PROG_CXX_WFLAGS([all extra sign-compare undef pointer-arith volatile-register-var])
AC_LANG_POP([C++])
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dnl
dnl  Debugging mode
dnl
AC_ARG_ENABLE(debug,
  [AS_HELP_STRING([--enable-debug],
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    [build with run-time assertions (default disabled)])],,
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  [enable_debug="no"])
AH_TEMPLATE(NDEBUG,
            [Define to 1 if debug code should NOT be compiled])
AS_IF([test "${enable_debug}" != "no"], [
  AC_CHECK_HEADERS([valgrind/valgrind.h])
], [
  AC_DEFINE(NDEBUG)
])

dnl
dnl  Profiling
dnl
AC_ARG_ENABLE(gprof,
  [AS_HELP_STRING([--enable-gprof],[profile with gprof (default disabled)])],,
  [enable_gprof="no"])
AS_IF([test "${enable_gprof}" != "no"], [
  CFLAGS="${CFLAGS} -pg"
  CXXFLAGS="${CXXFLAGS} -pg"
  OBJCFLAGS="${OBJCFLAGS} -pg"
  LDFLAGS="${LDFLAGS} -pg"
])

AC_ARG_ENABLE(cprof,
  [AS_HELP_STRING([--enable-cprof],[profile with cprof (default disabled)])],,
  [enable_cprof="no"])
AS_IF([test "${enable_gprof}" != "no"], [
  CFLAGS="${CFLAGS} -finstrument-functions"
  CXXFLAGS="${CXXFLAGS} -finstrument-functions"
  OBJCFLAGS="${OBJCFLAGS} -finstrument-functions"
  LDFLAGS="${LDFLAGS} -finstrument-functions"
])

dnl
dnl  Test coverage
dnl
AC_ARG_ENABLE(coverage,
  [AS_HELP_STRING([--enable-coverage],
    [build for test coverage (default disabled)])],,
  [enable_coverage="no"])
AS_IF([test "${enable_coverage}" != "no"], [
  CFLAGS="-fprofile-arcs -ftest-coverage ${CFLAGS}"
  CXXFLAGS="-fprofile-arcs -ftest-coverage ${CXXFLAGS}"
  LDFLAGS="-lgcov ${LDFLAGS}"
])

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AS_IF([test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"], [
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  VLC_SAVE_FLAGS
  CFLAGS="${CFLAGS} -fvisibility=hidden"
  CXXFLAGS="${CXXFLAGS} -fvisibility=hidden"
  OBJCFLAGS="${OBJCFLAGS} -fvisibility=hidden"
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  AC_CACHE_CHECK([if $CC accepts -fvisibility=hidden],
                 [ac_cv_c_visibility_hidden], [
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
      ac_cv_c_visibility_hidden=yes
    ], [
      ac_cv_c_visibility_hidden=no
    ])
  ])
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  AS_IF([test "${ac_cv_c_visibility_hidden}" = "no"], [VLC_RESTORE_FLAGS])
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])

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dnl
dnl  Enable/disable optimizations
dnl
AC_ARG_ENABLE(optimizations,
  [AS_HELP_STRING([--disable-optimizations],
    [disable compiler optimizations (default enabled)])],,
  [enable_optimizations="yes"])

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dnl Check for various optimization flags
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AS_IF([test "${enable_optimizations}" != "no"], [

  dnl -O4 and -O3 only in production builds
  AS_IF([test "{enable_debug}" = "no"], [
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    VLC_SAVE_FLAGS
    CFLAGS="${CFLAGS} -O4"
    CXXFLAGS="${CXXFLAGS} -O4"
    OBJCFLAGS="${OBJCFLAGS} -O4"
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    AC_CACHE_CHECK([if $CC accepts -O4], [ac_cv_c_o4], [
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
        ac_cv_c_o4=yes
      ], [
        ac_cv_c_o4=no
      ])
    ])
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    AS_IF([test "${ac_cv_c_o4}" = "no"], [
      VLC_RESTORE_FLAGS
      CFLAGS="${CFLAGS} -O3"
      CXXFLAGS="${CXXFLAGS} -O3"
      OBJCFLAGS="${OBJCFLAGS} -O3"
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      AC_CACHE_CHECK([if $CC accepts -O3],  [ac_cv_c_o3], [
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
          ac_cv_c_o3=yes
        ], [
          ac_cv_c_o3=no
        ])
      ])
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      AS_IF([test "${ac_cv_c_o3}" = "no"], [VLC_RESTORE_FLAGS])
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    ])
  ])
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  dnl Check for -ffast-math
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  VLC_SAVE_FLAGS
  CFLAGS="${CFLAGS} -ffast-math"
  CXXFLAGS="${CXXFLAGS} -ffast-math"
  OBJCFLAGS="${OBJCFLAGS} -ffast-math"
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  AC_CACHE_CHECK([if $CC accepts -ffast-math], [ac_cv_c_fast_math], [
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
      ac_cv_c_fast_math=yes
    ], [
      ac_cv_c_fast_math=no
    ])
  ])
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  AS_IF([test "${ac_cv_c_fast_math}" = "no"], [VLC_RESTORE_FLAGS])
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  AH_BOTTOM([
#ifndef __FAST_MATH__
# pragma STDC FENV_ACCESS OFF
# pragma STDC FP_CONTRACT ON
#endif
])
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  dnl Check for -funroll-loops
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  VLC_SAVE_FLAGS
  CFLAGS="${CFLAGS} -funroll-loops"
  CXXFLAGS="${CXXFLAGS} -funroll-loops"
  OBJCFLAGS="${OBJCFLAGS} -funroll-loops"
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  AC_CACHE_CHECK([if $CC accepts -funroll-loops], [ac_cv_c_unroll_loops], [
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
      ac_cv_c_unroll_loops=yes
    ], [
      ac_cv_c_unroll_loops=no
    ])
  ])
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  AS_IF([test "${ac_cv_c_unroll_loops}" = "no"], [VLC_RESTORE_FLAGS])
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  AS_IF([test "$enable_debug" = "no"], [
    dnl Check for -fomit-frame-pointer
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    VLC_SAVE_FLAGS
    CFLAGS="${CFLAGS} -fomit-frame-pointer"
    CXXFLAGS="${CXXFLAGS} -fomit-frame-pointer"
    OBJCFLAGS="${OBJCFLAGS} -fomit-frame-pointer"
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    AC_CACHE_CHECK([if $CC accepts -fomit-frame-pointer],
      [ac_cv_c_omit_frame_pointer], [
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
        ac_cv_c_omit_frame_pointer=yes
      ], [
        ac_cv_c_omit_frame_pointer=no
      ])
    ])
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    AS_IF([test "${ac_cv_c_omit_frame_pointer}" = "no"], [VLC_RESTORE_FLAGS])
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  ])
])
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dnl Check for Darwin plugin linking flags
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AS_IF([test "${SYS}" = "darwin"], [
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  VLC_SAVE_FLAGS
  CFLAGS="${CFLAGS} -bundle -undefined error"
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  AC_CACHE_CHECK([if $CC accepts -bundle -undefined error],
    [ac_cv_ld_darwin], [
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
      ac_cv_ld_darwin=yes
    ], [
      ac_cv_ld_darwin=no
    ])
  ])
  AS_IF([test "${ac_cv_ld_darwin}" != "no"], [
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    VLC_ADD_LDFLAGS([plugin],[-bundle -undefined error])
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  ])
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  VLC_RESTORE_FLAGS
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])
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dnl Checks for __attribute__(aligned()) directive
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VLC_SAVE_FLAGS
CFLAGS="${CFLAGS} -Werror"
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AC_CACHE_CHECK([__attribute__ ((aligned ())) support],
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    [ac_cv_c_attribute_aligned],
    [ac_cv_c_attribute_aligned=0
    for ac_cv_c_attr_align_try in 2 4 8 16 32 64; do
        AC_TRY_COMPILE([],
        [static char c __attribute__ ((aligned(${ac_cv_c_attr_align_try}))) = 0; return c;],
        [ac_cv_c_attribute_aligned="${ac_cv_c_attr_align_try}"])
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    done])
VLC_RESTORE_FLAGS
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Sam Hocevar committed
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if test "${ac_cv_c_attribute_aligned}" != "0"; then
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    AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX],
        [${ac_cv_c_attribute_aligned}],[Maximum supported data alignment])
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fi

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dnl Check for __attribute__((packed))
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AC_CACHE_CHECK([for __attribute__((packed))],
  [ac_cv_c_attribute_packed],
  [ac_cv_c_attribute_packed=no
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   AC_TRY_COMPILE(, [struct __attribute__((__packed__)) foo { int a; } b; (void)b;],
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                    [ac_cv_c_attribute_packed=yes])])
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if test "${ac_cv_c_attribute_packed}" != "no"; then
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  AC_DEFINE(HAVE_ATTRIBUTE_PACKED, 1, Support for __attribute__((packed)) for structs)
fi

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dnl
dnl  Check the CPU
dnl
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case "${host_cpu}" in
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  "")
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    ARCH=unknown
    ;;
  *)
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    ARCH="${host_cpu}"
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    ;;
esac

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dnl Check for backtrace() support
AC_CHECK_HEADERS(execinfo.h)
AC_CHECK_FUNCS(backtrace)

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dnl
dnl  default modules
dnl
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ALIASES="${ALIASES} cvlc rvlc"
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dnl
dnl Some plugins aren't useful on some platforms
dnl
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if test "${SYS}" = "os2"; then
    VLC_ADD_PLUGIN([dynamicoverlay])
elif test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
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    VLC_ADD_PLUGIN([dynamicoverlay access_shm])
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elif test "${SYS}" != "mingwce"; then
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    VLC_ADD_PLUGIN([access_smb dmo globalhotkeys])
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    VLC_ADD_LIBS([dmo],[-lole32 -luuid])
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fi
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if test "${SYS}" = "darwin"; then
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    VLC_ADD_LIBS([quartztext],[-Wl,-framework,ApplicationServices])
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fi
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dnl
dnl  Accelerated modules
dnl
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dnl  Check for fully working MMX intrinsics
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dnl  We need support for -mmmx, we need <mmintrin.h>, and we also need a
dnl  working compiler (http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23963)
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AC_ARG_ENABLE(mmx,
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  [AS_HELP_STRING([--disable-mmx],
    [disable MMX optimizations (default auto)])],,[
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  case "${host_cpu}" in
    i?86|x86_64)
      enable_mmx="yes"
      ;;
    *)
      enable_mmx="no"
      ;;
  esac
])
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have_mmx="no"
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AS_IF([test "${enable_mmx}" != "no"], [
  ARCH="${ARCH} mmx"
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  VLC_SAVE_FLAGS
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  CFLAGS="${CFLAGS} -mmmx"
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  AC_CACHE_CHECK([if $CC groks MMX intrinsics], [ac_cv_c_mmx_intrinsics], [
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
[#include <mmintrin.h>
#include <stdint.h>
uint64_t frobzor;]], [
[__m64 a, b, c;
a = b = c = (__m64)frobzor;
a = _mm_slli_pi16(a, 3);
a = _mm_adds_pi16(a, b);
c = _mm_srli_pi16(c, 8);
c = _mm_slli_pi16(c, 3);
b = _mm_adds_pi16(b, c);
a = _mm_unpacklo_pi8(a, b);
frobzor = (uint64_t)a;]])], [
      ac_cv_c_mmx_intrinsics=yes
    ], [
      ac_cv_c_mmx_intrinsics=no
    ])
  ])
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  VLC_RESTORE_FLAGS
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  AS_IF([test "${ac_cv_c_mmx_intrinsics}" != "no"], [
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    AC_DEFINE(HAVE_MMX_INTRINSICS, 1, [Define to 1 if MMX intrinsics are available.])
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  ])

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  VLC_SAVE_FLAGS
  CFLAGS="${CFLAGS} -mmmx"
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  AC_CACHE_CHECK([if $CC groks MMX inline assembly], [ac_cv_mmx_inline], [
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,[[
void *p;
asm volatile("packuswb %%mm1,%%mm2"::"r"(p):"mm1", "mm2");
]])
    ], [
      ac_cv_mmx_inline=yes
    ], [
      ac_cv_mmx_inline=no
    ])
  ])
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  AS_IF([test "${ac_cv_mmx_inline}" != "no"], [
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    AC_DEFINE(CAN_COMPILE_MMX, 1, [Define to 1 inline MMX assembly is available.])
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    have_mmx="yes"
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  ])

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  VLC_RESTORE_FLAGS