# Configure paths for SDL
# Sam Lantinga 9/21/99
# stolen from Manish Singh
# stolen back from Frank Belew
# stolen from Manish Singh
# Shamelessly stolen from Owen Taylor

dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
dnl
AC_DEFUN([AM_PATH_SDL],
[dnl 
dnl Get the cflags and libraries from the sdl-config script
dnl
AC_ARG_WITH(sdl-static,[  --with-sdl-static       Link SDL staticaly (optional)],
            sdl_static="$withval", sdl_static="")
AC_ARG_WITH(sdl-prefix,[  --with-sdl-prefix=PFX   Prefix where SDL is installed (optional)],
            sdl_prefix="$withval", sdl_prefix="")
AC_ARG_WITH(sdl-exec-prefix,[  --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
            sdl_exec_prefix="$withval", sdl_exec_prefix="")
AC_ARG_ENABLE(sdltest, [  --disable-sdltest       Do not try to compile and run a test SDL program],
		    , enable_sdltest=yes)

  if test x$sdl_exec_prefix != x ; then
     sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix"
     if test x${SDL_CONFIG+set} != xset ; then
        SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
     fi
  fi
  if test x$sdl_prefix != x ; then
     sdl_args="$sdl_args --prefix=$sdl_prefix"
     if test x${SDL_CONFIG+set} != xset ; then
        SDL_CONFIG=$sdl_prefix/bin/sdl-config
     fi
  fi

  AC_REQUIRE([AC_CANONICAL_TARGET])
  PATH="$prefix/bin:$prefix/usr/bin:$PATH"
  AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH])
  min_sdl_version=ifelse([$1], ,0.11.0,$1)
  AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
  no_sdl=""
  if test "$SDL_CONFIG" = "no" ; then
    no_sdl=yes
  else
    SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`

	if test x"$sdl_static" = x"yes"; then
    SDL_LIBS=`$SDL_CONFIG $sdlconf_args --static-libs`
	else
    SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
	fi

    sdl_major_version=`$SDL_CONFIG $sdl_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    if test "x$enable_sdltest" = "xyes" ; then
      ac_save_CFLAGS="$CFLAGS"
      ac_save_CXXFLAGS="$CXXFLAGS"
      ac_save_LIBS="$LIBS"
      CFLAGS="$CFLAGS $SDL_CFLAGS"
      CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
      LIBS="$LIBS $SDL_LIBS"
dnl
dnl Now check if the installed SDL is sufficiently new. (Also sanity
dnl checks the results of sdl-config to some extent
dnl
      rm -f conf.sdltest
      AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "SDL.h"

char*
my_strdup (char *str)
{
  char *new_str;
  
  if (str)
    {
      new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
      strcpy (new_str, str);
    }
  else
    new_str = NULL;
  
  return new_str;
}

int main (int argc, char *argv[])
{
  int major, minor, micro;
  char *tmp_version;

  /* This hangs on some systems (?)
  system ("touch conf.sdltest");
  */
  { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }

  /* HP/UX 9 (%@#!) writes to sscanf strings */
  tmp_version = my_strdup("$min_sdl_version");
  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
     printf("%s, bad version string\n", "$min_sdl_version");
     exit(1);
   }

   if (($sdl_major_version > major) ||
      (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
      (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
    {
      return 0;
    }
  else
    {
      printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
      printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
      printf("*** best to upgrade to the required version.\n");
      printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
      printf("*** to point to the correct copy of sdl-config, and remove the file\n");
      printf("*** config.cache before re-running configure\n");
      return 1;
    }
}

],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
       CFLAGS="$ac_save_CFLAGS"
       CXXFLAGS="$ac_save_CXXFLAGS"
       LIBS="$ac_save_LIBS"
     fi
  fi
  if test "x$no_sdl" = x ; then
     AC_MSG_RESULT(yes)
     ifelse([$2], , :, [$2])     
  else
     AC_MSG_RESULT(no)
     if test "$SDL_CONFIG" = "no" ; then
       echo "*** The sdl-config script installed by SDL could not be found"
       echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
       echo "*** your path, or set the SDL_CONFIG environment variable to the"
       echo "*** full path to sdl-config."
     else
       if test -f conf.sdltest ; then
        :
       else
          echo "*** Could not run SDL test program, checking why..."
          CFLAGS="$CFLAGS $SDL_CFLAGS"
          CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
          LIBS="$LIBS $SDL_LIBS"
          AC_TRY_LINK([
#include <stdio.h>
#include "SDL.h"

int main(int argc, char *argv[])
{ return 0; }
#undef  main
#define main K_and_R_C_main
],      [ return 0; ],
        [ echo "*** The test program compiled, but did not run. This usually means"
          echo "*** that the run-time linker is not finding SDL or finding the wrong"
          echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
          echo "*** is required on your system"
	  echo "***"
          echo "*** If you have an old version installed, it is best to remove it, although"
          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
        [ echo "*** The test program failed to compile or link. See the file config.log for the"
          echo "*** exact error that occured. This usually means SDL was incorrectly installed"
          echo "*** or that you have moved SDL since it was installed. In the latter case, you"
          echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
          CFLAGS="$ac_save_CFLAGS"
          CXXFLAGS="$ac_save_CXXFLAGS"
          LIBS="$ac_save_LIBS"
       fi
     fi
     SDL_CFLAGS=""
     SDL_LIBS=""
     ifelse([$3], , :, [$3])
  fi
  AC_SUBST(SDL_CFLAGS)
  AC_SUBST(SDL_LIBS)
  rm -f conf.sdltest
])
dnl ---------------------------------------------------------------------------
dnl Macros for wxWindows detection. Typically used in configure.in as:
dnl
dnl 	AC_ARG_ENABLE(...)
dnl 	AC_ARG_WITH(...)
dnl	...
dnl	AM_OPTIONS_WXCONFIG
dnl	...
dnl	...
dnl	AM_PATH_WXCONFIG(2.3.4, wxWin=1)
dnl     if test "$wxWin" != 1; then
dnl        AC_MSG_ERROR([
dnl     	   wxWindows must be installed on your system
dnl     	   but wx-config script couldn't be found.
dnl     
dnl     	   Please check that wx-config is in path, the directory
dnl     	   where wxWindows libraries are installed (returned by
dnl     	   'wx-config --libs' command) is in LD_LIBRARY_PATH or
dnl     	   equivalent variable and wxWindows version is 2.3.4 or above.
dnl        ])
dnl     fi
dnl     CPPFLAGS="$CPPFLAGS $WX_CPPFLAGS"
dnl     CXXFLAGS="$CXXFLAGS $WX_CXXFLAGS_ONLY"
dnl     CFLAGS="$CFLAGS $WX_CFLAGS_ONLY"
dnl     
dnl     LDFLAGS="$LDFLAGS $WX_LIBS"
dnl ---------------------------------------------------------------------------

dnl ---------------------------------------------------------------------------
dnl AM_OPTIONS_WXCONFIG
dnl
dnl adds support for --wx-prefix, --wx-exec-prefix and --wx-config 
dnl command line options
dnl ---------------------------------------------------------------------------

AC_DEFUN([AM_OPTIONS_WXCONFIG],
[
   AC_ARG_WITH(wx-prefix, [  --with-wx-prefix=PREFIX   Prefix where wxWindows is installed (optional)],
               wx_config_prefix="$withval", wx_config_prefix="")
   AC_ARG_WITH(wx-exec-prefix,[  --with-wx-exec-prefix=PREFIX Exec prefix where wxWindows is installed (optional)],
               wx_config_exec_prefix="$withval", wx_config_exec_prefix="")
   AC_ARG_WITH(wx-config,[  --with-wx-config=CONFIG   wx-config script to use (optional)],
               wx_config_name="$withval", wx_config_name="")
])

dnl ---------------------------------------------------------------------------
dnl AM_PATH_WXCONFIG(VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl
dnl Test for wxWindows, and define WX_C*FLAGS, WX_LIBS and WX_LIBS_STATIC
dnl (the latter is for static linking against wxWindows). Set WX_CONFIG_NAME
dnl environment variable to override the default name of the wx-config script
dnl to use. Set WX_CONFIG_PATH to specify the full path to wx-config - in this
dnl case the macro won't even waste time on tests for its existence.
dnl ---------------------------------------------------------------------------

dnl
dnl Get the cflags and libraries from the wx-config script
dnl
AC_DEFUN([AM_PATH_WXCONFIG],
[
  dnl do we have wx-config name: it can be wx-config or wxd-config or ...
  if test x${WX_CONFIG_NAME+set} != xset ; then
     WX_CONFIG_NAME=wx-config
  fi
  if test "x$wx_config_name" != x ; then
     WX_CONFIG_NAME="$wx_config_name"
  fi

  dnl deal with optional prefixes
  if test x$wx_config_exec_prefix != x ; then
     wx_config_args="$wx_config_args --exec-prefix=$wx_config_exec_prefix"
     WX_LOOKUP_PATH="$wx_config_exec_prefix/bin"
  fi
  if test x$wx_config_prefix != x ; then
     wx_config_args="$wx_config_args --prefix=$wx_config_prefix"
     WX_LOOKUP_PATH="$WX_LOOKUP_PATH:$wx_config_prefix/bin"
  fi

  dnl don't search the PATH if WX_CONFIG_NAME is absolute filename
  if test -x "$WX_CONFIG_NAME" ; then
     AC_MSG_CHECKING(for wx-config)
     WX_CONFIG_PATH="$WX_CONFIG_NAME"
     AC_MSG_RESULT($WX_CONFIG_PATH)
  else
     AC_PATH_PROG(WX_CONFIG_PATH, $WX_CONFIG_NAME, no, "$WX_LOOKUP_PATH:$PATH")
  fi

  if test "$WX_CONFIG_PATH" != "no" ; then
    WX_VERSION=""
    no_wx=""

    min_wx_version=ifelse([$1], ,2.2.1,$1)
    AC_MSG_CHECKING(for wxWindows version >= $min_wx_version)

    WX_CONFIG_WITH_ARGS="$WX_CONFIG_PATH $wx_config_args"

    WX_VERSION=`$WX_CONFIG_WITH_ARGS --version`
    wx_config_major_version=`echo $WX_VERSION | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    wx_config_minor_version=`echo $WX_VERSION | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    wx_config_micro_version=`echo $WX_VERSION | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`

    wx_requested_major_version=`echo $min_wx_version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    wx_requested_minor_version=`echo $min_wx_version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    wx_requested_micro_version=`echo $min_wx_version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`

    wx_ver_ok=""
    if test $wx_config_major_version -gt $wx_requested_major_version; then
      wx_ver_ok=yes
    else
      if test $wx_config_major_version -eq $wx_requested_major_version; then
         if test $wx_config_minor_version -gt $wx_requested_minor_version; then
            wx_ver_ok=yes
         else
            if test $wx_config_minor_version -eq $wx_requested_minor_version; then
               if test $wx_config_micro_version -ge $wx_requested_micro_version; then
                  wx_ver_ok=yes
               fi
            fi
         fi
      fi
    fi

    if test "x$wx_ver_ok" = x ; then
      no_wx=yes
    else
      WX_LIBS=`$WX_CONFIG_WITH_ARGS --libs`
      WX_LIBS_STATIC=`$WX_CONFIG_WITH_ARGS --static --libs`

      dnl starting with version 2.2.6 wx-config has --cppflags argument
      wx_has_cppflags=""
      if test $wx_config_major_version -gt 2; then
        wx_has_cppflags=yes
      else
        if test $wx_config_major_version -eq 2; then
           if test $wx_config_minor_version -gt 2; then
              wx_has_cppflags=yes
           else
              if test $wx_config_minor_version -eq 2; then
                 if test $wx_config_micro_version -ge 6; then
                    wx_has_cppflags=yes
                 fi
              fi
           fi
        fi
      fi

      if test "x$wx_has_cppflags" = x ; then
         dnl no choice but to define all flags like CFLAGS
         WX_CFLAGS=`$WX_CONFIG_WITH_ARGS --cflags`
         WX_CPPFLAGS=$WX_CFLAGS
         WX_CXXFLAGS=$WX_CFLAGS

         WX_CFLAGS_ONLY=$WX_CFLAGS
         WX_CXXFLAGS_ONLY=$WX_CFLAGS
      else
         dnl we have CPPFLAGS included in CFLAGS included in CXXFLAGS
         WX_CPPFLAGS=`$WX_CONFIG_WITH_ARGS --cppflags`
         WX_CXXFLAGS=`$WX_CONFIG_WITH_ARGS --cxxflags`
         WX_CFLAGS=`$WX_CONFIG_WITH_ARGS --cflags`

         WX_CFLAGS_ONLY=`echo $WX_CFLAGS | sed "s@^$WX_CPPFLAGS *@@"`
         WX_CXXFLAGS_ONLY=`echo $WX_CXXFLAGS | sed "s@^$WX_CFLAGS *@@"`
      fi
    fi

    if test "x$no_wx" = x ; then
       AC_MSG_RESULT(yes (version $WX_VERSION))
       ifelse([$2], , :, [$2])
    else
       if test "x$WX_VERSION" = x; then
	  dnl no wx-config at all
	  AC_MSG_RESULT(no)
       else
	  AC_MSG_RESULT(no (version $WX_VERSION is not new enough))
       fi

       WX_CFLAGS=""
       WX_CPPFLAGS=""
       WX_CXXFLAGS=""
       WX_LIBS=""
       WX_LIBS_STATIC=""
       ifelse([$3], , :, [$3])
    fi
  fi

  AC_SUBST(WX_CPPFLAGS)
  AC_SUBST(WX_CFLAGS)
  AC_SUBST(WX_CXXFLAGS)
  AC_SUBST(WX_CFLAGS_ONLY)
  AC_SUBST(WX_CXXFLAGS_ONLY)
  AC_SUBST(WX_LIBS)
  AC_SUBST(WX_LIBS_STATIC)
  AC_SUBST(WX_VERSION)
])
# Configure paths for FreeType2
# Marcelo Magallon 2001-10-26, based on gtk.m4 by Owen Taylor
#
# serial 2

# AC_CHECK_FT2([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
# Test for FreeType 2, and define FT2_CFLAGS and FT2_LIBS.
# MINIMUM-VERSION is what libtool reports; the default is `7.0.1' (this is
# FreeType 2.0.4).
#
AC_DEFUN([AC_CHECK_FT2],
  [# Get the cflags and libraries from the freetype-config script
   #
   AC_ARG_WITH([ft-prefix],
     AC_HELP_STRING([--with-ft-prefix=PREFIX],
                    [Prefix where FreeType is installed (optional)]),
     [ft_config_prefix="$withval"],
     [ft_config_prefix=""])

   AC_ARG_WITH([ft-exec-prefix],
     AC_HELP_STRING([--with-ft-exec-prefix=PREFIX],
                    [Exec prefix where FreeType is installed (optional)]),
     [ft_config_exec_prefix="$withval"],
     [ft_config_exec_prefix=""])

   AC_ARG_ENABLE([freetypetest],
     AC_HELP_STRING([--disable-freetypetest],
                    [Do not try to compile and run a test FreeType program]),
     [],
     [enable_fttest=yes])

   if test x$ft_config_exec_prefix != x ; then
     ft_config_args="$ft_config_args --exec-prefix=$ft_config_exec_prefix"
     if test x${FT2_CONFIG+set} != xset ; then
       FT2_CONFIG=$ft_config_exec_prefix/bin/freetype-config
     fi
   fi

   if test x$ft_config_prefix != x ; then
     ft_config_args="$ft_config_args --prefix=$ft_config_prefix"
     if test x${FT2_CONFIG+set} != xset ; then
       FT2_CONFIG=$ft_config_prefix/bin/freetype-config
     fi
   fi

   AC_PATH_PROG([FT2_CONFIG], [freetype-config], [no])

   min_ft_version=m4_if([$1], [], [7.0.1], [$1])
   AC_MSG_CHECKING([for FreeType -- version >= $min_ft_version])
   no_ft=""
   if test "$FT2_CONFIG" = "no" ; then
     no_ft=yes
   else
     FT2_CFLAGS=`$FT2_CONFIG $ft_config_args --cflags`
     FT2_LIBS=`$FT2_CONFIG $ft_config_args --libs`
     ft_config_major_version=`$FT2_CONFIG $ft_config_args --version | \
       sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
     ft_config_minor_version=`$FT2_CONFIG $ft_config_args --version | \
       sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
     ft_config_micro_version=`$FT2_CONFIG $ft_config_args --version | \
       sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
     ft_min_major_version=`echo $min_ft_version | \
       sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
     ft_min_minor_version=`echo $min_ft_version | \
       sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
     ft_min_micro_version=`echo $min_ft_version | \
       sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
     if test x$enable_fttest = xyes ; then
       ft_config_is_lt=""
       if test $ft_config_major_version -lt $ft_min_major_version ; then
         ft_config_is_lt=yes
       else
         if test $ft_config_major_version -eq $ft_min_major_version ; then
           if test $ft_config_minor_version -lt $ft_min_minor_version ; then
             ft_config_is_lt=yes
           else
             if test $ft_config_minor_version -eq $ft_min_minor_version ; then
               if test $ft_config_micro_version -lt $ft_min_micro_version ; then
                 ft_config_is_lt=yes
               fi
             fi
           fi
         fi
       fi
       if test x$ft_config_is_lt = xyes ; then
         no_ft=yes
       else
         ac_save_CFLAGS="$CFLAGS"
         ac_save_LIBS="$LIBS"
         CFLAGS="$CFLAGS $FT2_CFLAGS"
         LIBS="$FT2_LIBS $LIBS"

         #
         # Sanity checks for the results of freetype-config to some extent.
         #
         AC_RUN_IFELSE([
             AC_LANG_SOURCE([[

#include <ft2build.h>
#include FT_FREETYPE_H
#include <stdio.h>
#include <stdlib.h>

int
main()
{
  FT_Library library;
  FT_Error  error;

  error = FT_Init_FreeType(&library);

  if (error)
    return 1;
  else
  {
    FT_Done_FreeType(library);
    return 0;
  }
}

             ]])
           ],
           [],
           [no_ft=yes],
           [echo $ECHO_N "cross compiling; assuming OK... $ECHO_C"])

         CFLAGS="$ac_save_CFLAGS"
         LIBS="$ac_save_LIBS"
       fi             # test $ft_config_version -lt $ft_min_version
     fi               # test x$enable_fttest = xyes
   fi                 # test "$FT2_CONFIG" = "no"

   if test x$no_ft = x ; then
     AC_MSG_RESULT([yes])
     m4_if([$2], [], [:], [$2])
   else
     AC_MSG_RESULT([no])
     if test "$FT2_CONFIG" = "no" ; then
       AC_MSG_WARN([

  The freetype-config script installed by FreeType 2 could not be found.
  If FreeType 2 was installed in PREFIX, make sure PREFIX/bin is in
  your path, or set the FT2_CONFIG environment variable to the
  full path to freetype-config.
       ])
     else
       if test x$ft_config_is_lt = xyes ; then
         AC_MSG_WARN([

  Your installed version of the FreeType 2 library is too old.
  If you have different versions of FreeType 2, make sure that
  correct values for --with-ft-prefix or --with-ft-exec-prefix
  are used, or set the FT2_CONFIG environment variable to the
  full path to freetype-config.
         ])
       else
         AC_MSG_WARN([

  The FreeType test program failed to run.  If your system uses
  shared libraries and they are installed outside the normal
  system library path, make sure the variable LD_LIBRARY_PATH
  (or whatever is appropiate for your system) is correctly set.
         ])
       fi
     fi

     FT2_CFLAGS=""
     FT2_LIBS=""
     m4_if([$3], [], [:], [$3])
   fi

   AC_SUBST([FT2_CFLAGS])
   AC_SUBST([FT2_LIBS])])

# end of freetype2.m4
# Configure paths for libogg
# Jack Moffitt <jack@icecast.org> 10-21-2000
# Shamelessly stolen from Owen Taylor and Manish Singh

dnl XIPH_PATH_OGG([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl Test for libogg, and define OGG_CFLAGS and OGG_LIBS
dnl
AC_DEFUN([XIPH_PATH_OGG],
[dnl 
dnl Get the cflags and libraries
dnl
AC_ARG_WITH(ogg,[  --with-ogg=PFX   Prefix where libogg is installed (optional)], ogg_prefix="$withval", ogg_prefix="")
AC_ARG_WITH(ogg-libraries,[  --with-ogg-libraries=DIR   Directory where libogg library is installed (optional)], ogg_libraries="$withval", ogg_libraries="")
AC_ARG_WITH(ogg-includes,[  --with-ogg-includes=DIR   Directory where libogg header files are installed (optional)], ogg_includes="$withval", ogg_includes="")
AC_ARG_ENABLE(oggtest, [  --disable-oggtest       Do not try to compile and run a test Ogg program],, enable_oggtest=yes)

  if test "x$ogg_libraries" != "x" ; then
    OGG_LIBS="-L$ogg_libraries"
  elif test "x$ogg_prefix" != "x" ; then
    OGG_LIBS="-L$ogg_prefix/lib"
  elif test "x$prefix" != "xNONE" ; then
    OGG_LIBS="-L$prefix/lib"
  fi

  OGG_LIBS="$OGG_LIBS -logg"

  if test "x$ogg_includes" != "x" ; then
    OGG_CFLAGS="-I$ogg_includes"
  elif test "x$ogg_prefix" != "x" ; then
    OGG_CFLAGS="-I$ogg_prefix/include"
  elif test "x$prefix" != "xNONE"; then
    OGG_CFLAGS="-I$prefix/include"
  fi

  AC_MSG_CHECKING(for Ogg)
  no_ogg=""


  if test "x$enable_oggtest" = "xyes" ; then
    ac_save_CFLAGS="$CFLAGS"
    ac_save_LIBS="$LIBS"
    CFLAGS="$CFLAGS $OGG_CFLAGS"
    LIBS="$LIBS $OGG_LIBS"
dnl
dnl Now check if the installed Ogg is sufficiently new.
dnl
      rm -f conf.oggtest
      AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ogg/ogg.h>

int main ()
{
  system("touch conf.oggtest");
  return 0;
}

],, no_ogg=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
       CFLAGS="$ac_save_CFLAGS"
       LIBS="$ac_save_LIBS"
  fi

  if test "x$no_ogg" = "x" ; then
     AC_MSG_RESULT(yes)
     ifelse([$1], , :, [$1])     
  else
     AC_MSG_RESULT(no)
     if test -f conf.oggtest ; then
       :
     else
       echo "*** Could not run Ogg test program, checking why..."
       CFLAGS="$CFLAGS $OGG_CFLAGS"
       LIBS="$LIBS $OGG_LIBS"
       AC_TRY_LINK([
#include <stdio.h>
#include <ogg/ogg.h>
],     [ return 0; ],
       [ echo "*** The test program compiled, but did not run. This usually means"
       echo "*** that the run-time linker is not finding Ogg or finding the wrong"
       echo "*** version of Ogg. If it is not finding Ogg, you'll need to set your"
       echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
       echo "*** to the installed location  Also, make sure you have run ldconfig if that"
       echo "*** is required on your system"
       echo "***"
       echo "*** If you have an old version installed, it is best to remove it, although"
       echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
       [ echo "*** The test program failed to compile or link. See the file config.log for the"
       echo "*** exact error that occured. This usually means Ogg was incorrectly installed"
       echo "*** or that you have moved Ogg since it was installed." ])
       CFLAGS="$ac_save_CFLAGS"
       LIBS="$ac_save_LIBS"
     fi
     OGG_CFLAGS=""
     OGG_LIBS=""
     ifelse([$2], , :, [$2])
  fi
  AC_SUBST(OGG_CFLAGS)
  AC_SUBST(OGG_LIBS)
  rm -f conf.oggtest
])
# Configure paths for libvorbis
# Jack Moffitt <jack@icecast.org> 10-21-2000
# Shamelessly stolen from Owen Taylor and Manish Singh
# thomasvs added check for vorbis_bitrate_addblock which is new in rc3

dnl XIPH_PATH_VORBIS([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl Test for libvorbis, and define VORBIS_CFLAGS and VORBIS_LIBS
dnl
AC_DEFUN([XIPH_PATH_VORBIS],
[dnl 
dnl Get the cflags and libraries
dnl
AC_ARG_WITH(vorbis,[  --with-vorbis=PFX   Prefix where libvorbis is installed (optional)], vorbis_prefix="$withval", vorbis_prefix="")
AC_ARG_WITH(vorbis-libraries,[  --with-vorbis-libraries=DIR   Directory where libvorbis library is installed (optional)], vorbis_libraries="$withval", vorbis_libraries="")
AC_ARG_WITH(vorbis-includes,[  --with-vorbis-includes=DIR   Directory where libvorbis header files are installed (optional)], vorbis_includes="$withval", vorbis_includes="")
AC_ARG_ENABLE(vorbistest, [  --disable-vorbistest       Do not try to compile and run a test Vorbis program],, enable_vorbistest=yes)

  if test "x$vorbis_libraries" != "x" ; then
    VORBIS_LIBS="-L$vorbis_libraries"
  elif test "x$vorbis_prefix" != "x" ; then
    VORBIS_LIBS="-L$vorbis_prefix/lib"
  elif test "x$prefix" != "xNONE"; then
    VORBIS_LIBS="-L$prefix/lib"
  fi

  VORBIS_LIBS="$VORBIS_LIBS -lvorbis -lm"
  VORBISFILE_LIBS="-lvorbisfile"
  VORBISENC_LIBS="-lvorbisenc"

  if test "x$vorbis_includes" != "x" ; then
    VORBIS_CFLAGS="-I$vorbis_includes"
  elif test "x$vorbis_prefix" != "x" ; then
    VORBIS_CFLAGS="-I$vorbis_prefix/include"
  elif test "x$prefix" != "xNONE"; then
    VORBIS_CFLAGS="-I$prefix/include"
  fi


  AC_MSG_CHECKING(for Vorbis)
  no_vorbis=""


  if test "x$enable_vorbistest" = "xyes" ; then
    ac_save_CFLAGS="$CFLAGS"
    ac_save_LIBS="$LIBS"
    CFLAGS="$CFLAGS $VORBIS_CFLAGS $OGG_CFLAGS"
    LIBS="$LIBS $VORBIS_LIBS $VORBISENC_LIBS $OGG_LIBS"
dnl
dnl Now check if the installed Vorbis is sufficiently new.
dnl
      rm -f conf.vorbistest
      AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vorbis/codec.h>
#include <vorbis/vorbisenc.h>

int main ()
{
    vorbis_block 	vb;
    vorbis_dsp_state	vd;
    vorbis_info		vi;

    vorbis_info_init (&vi);
    vorbis_encode_init (&vi, 2, 44100, -1, 128000, -1);
    vorbis_analysis_init (&vd, &vi);
    vorbis_block_init (&vd, &vb);
    /* this function was added in 1.0rc3, so this is what we're testing for */
    vorbis_bitrate_addblock (&vb);

    system("touch conf.vorbistest");
    return 0;
}

],, no_vorbis=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
       CFLAGS="$ac_save_CFLAGS"
       LIBS="$ac_save_LIBS"
  fi

  if test "x$no_vorbis" = "x" ; then
     AC_MSG_RESULT(yes)
     ifelse([$1], , :, [$1])     
  else
     AC_MSG_RESULT(no)
     if test -f conf.vorbistest ; then
       :
     else
       echo "*** Could not run Vorbis test program, checking why..."
       CFLAGS="$CFLAGS $VORBIS_CFLAGS"
       LIBS="$LIBS $VORBIS_LIBS $OGG_LIBS"
       AC_TRY_LINK([
#include <stdio.h>
#include <vorbis/codec.h>
],     [ return 0; ],
       [ echo "*** The test program compiled, but did not run. This usually means"
       echo "*** that the run-time linker is not finding Vorbis or finding the wrong"
       echo "*** version of Vorbis. If it is not finding Vorbis, you'll need to set your"
       echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
       echo "*** to the installed location  Also, make sure you have run ldconfig if that"
       echo "*** is required on your system"
       echo "***"
       echo "*** If you have an old version installed, it is best to remove it, although"
       echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
       [ echo "*** The test program failed to compile or link. See the file config.log for the"
       echo "*** exact error that occured. This usually means Vorbis was incorrectly installed"
       echo "*** or that you have moved Vorbis since it was installed." ])
       CFLAGS="$ac_save_CFLAGS"
       LIBS="$ac_save_LIBS"
     fi
     VORBIS_CFLAGS=""
     VORBIS_LIBS=""
     VORBISFILE_LIBS=""
     VORBISENC_LIBS=""
     ifelse([$2], , :, [$2])
  fi
  AC_SUBST(VORBIS_CFLAGS)
  AC_SUBST(VORBIS_LIBS)
  AC_SUBST(VORBISFILE_LIBS)
  AC_SUBST(VORBISENC_LIBS)
  rm -f conf.vorbistest
])