# Configure paths for GLIB

# Owen Taylor     1997-2001

dnl AM_PATH_GLIB_2_0([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, MODULES]]]])

dnl Test for GLIB, and define GLIB_CFLAGS and GLIB_LIBS, if gmodule, gobject or 

dnl gthread is specified in MODULES, pass to pkg-config

dnl

AC_DEFUN([AM_PATH_GLIB_2_0],

[dnl 

dnl Get the cflags and libraries from pkg-config

dnl

AC_ARG_ENABLE(glibtest, [  --disable-glibtest      do not try to compile and run a test GLIB program],

		    , enable_glibtest=yes)

  pkg_config_args=glib-2.0

  for module in . $4

  do

      case "$module" in

         gmodule) 

             pkg_config_args="$pkg_config_args gmodule-2.0"

         ;;

         gobject) 

             pkg_config_args="$pkg_config_args gobject-2.0"

         ;;

         gthread) 

             pkg_config_args="$pkg_config_args gthread-2.0"

         ;;

      esac

  done

  AC_PATH_PROG(PKG_CONFIG, pkg-config, no)

  no_glib=""

  if test x$PKG_CONFIG != xno ; then

    if $PKG_CONFIG --atleast-pkgconfig-version 0.7 ; then

      :

    else

      echo *** pkg-config too old; version 0.7 or better required.

      no_glib=yes

      PKG_CONFIG=no

    fi

  else

    no_glib=yes

  fi

  min_glib_version=ifelse([$1], ,2.0.0,$1)

  AC_MSG_CHECKING(for GLIB - version >= $min_glib_version)

  if test x$PKG_CONFIG != xno ; then

    ## don't try to run the test against uninstalled libtool libs

    if $PKG_CONFIG --uninstalled $pkg_config_args; then

	  echo "Will use uninstalled version of GLib found in PKG_CONFIG_PATH"

	  enable_glibtest=no

    fi

    if $PKG_CONFIG --atleast-version $min_glib_version $pkg_config_args; then

	  :

    else

	  no_glib=yes

    fi

  fi

  if test x"$no_glib" = x ; then

    GLIB_GENMARSHAL=`$PKG_CONFIG --variable=glib_genmarshal glib-2.0`

    GOBJECT_QUERY=`$PKG_CONFIG --variable=gobject_query glib-2.0`

    GLIB_MKENUMS=`$PKG_CONFIG --variable=glib_mkenums glib-2.0`

    GLIB_CFLAGS=`$PKG_CONFIG --cflags $pkg_config_args`

    GLIB_LIBS=`$PKG_CONFIG --libs $pkg_config_args`

    glib_config_major_version=`$PKG_CONFIG --modversion glib-2.0 | \

           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`

    glib_config_minor_version=`$PKG_CONFIG --modversion glib-2.0 | \

           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`

    glib_config_micro_version=`$PKG_CONFIG --modversion glib-2.0 | \

           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`

    if test "x$enable_glibtest" = "xyes" ; then

      ac_save_CFLAGS="$CFLAGS"

      ac_save_LIBS="$LIBS"

      CFLAGS="$CFLAGS $GLIB_CFLAGS"

      LIBS="$GLIB_LIBS $LIBS"

dnl

dnl Now check if the installed GLIB is sufficiently new. (Also sanity

dnl checks the results of pkg-config to some extent)

dnl

      rm -f conf.glibtest

      AC_TRY_RUN([

#include <glib.h>

#include <stdio.h>

#include <stdlib.h>

int 

main ()

{

  int major, minor, micro;

  char *tmp_version;

  system ("touch conf.glibtest");

  /* HP/UX 9 (%@#!) writes to sscanf strings */

  tmp_version = g_strdup("$min_glib_version");

  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {

     printf("%s, bad version string\n", "$min_glib_version");

     exit(1);

   }

  if ((glib_major_version != $glib_config_major_version) ||

      (glib_minor_version != $glib_config_minor_version) ||

      (glib_micro_version != $glib_config_micro_version))

    {

      printf("\n*** 'pkg-config --modversion glib-2.0' returned %d.%d.%d, but GLIB (%d.%d.%d)\n", 

             $glib_config_major_version, $glib_config_minor_version, $glib_config_micro_version,

             glib_major_version, glib_minor_version, glib_micro_version);

      printf ("*** was found! If pkg-config was correct, then it is best\n");

      printf ("*** to remove the old version of GLib. You may also be able to fix the error\n");

      printf("*** by modifying your LD_LIBRARY_PATH enviroment variable, or by editing\n");

      printf("*** /etc/ld.so.conf. Make sure you have run ldconfig if that is\n");

      printf("*** required on your system.\n");

      printf("*** If pkg-config was wrong, set the environment variable PKG_CONFIG_PATH\n");

      printf("*** to point to the correct configuration files\n");

    } 

  else if ((glib_major_version != GLIB_MAJOR_VERSION) ||

	   (glib_minor_version != GLIB_MINOR_VERSION) ||

           (glib_micro_version != GLIB_MICRO_VERSION))

    {

      printf("*** GLIB header files (version %d.%d.%d) do not match\n",

	     GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION);

      printf("*** library (version %d.%d.%d)\n",

	     glib_major_version, glib_minor_version, glib_micro_version);

    }

  else

    {

      if ((glib_major_version > major) ||

        ((glib_major_version == major) && (glib_minor_version > minor)) ||

        ((glib_major_version == major) && (glib_minor_version == minor) && (glib_micro_version >= micro)))

      {

        return 0;

       }

     else

      {

        printf("\n*** An old version of GLIB (%d.%d.%d) was found.\n",

               glib_major_version, glib_minor_version, glib_micro_version);

        printf("*** You need a version of GLIB newer than %d.%d.%d. The latest version of\n",

	       major, minor, micro);

        printf("*** GLIB is always available from ftp://ftp.gtk.org.\n");

        printf("***\n");

        printf("*** If you have already installed a sufficiently new version, this error\n");

        printf("*** probably means that the wrong copy of the pkg-config shell script is\n");

        printf("*** being found. The easiest way to fix this is to remove the old version\n");

        printf("*** of GLIB, but you can also set the PKG_CONFIG environment to point to the\n");

        printf("*** correct copy of pkg-config. (In this case, you will have to\n");

        printf("*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n");

        printf("*** so that the correct libraries are found at run-time))\n");

      }

    }

  return 1;

}

],, no_glib=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])

       CFLAGS="$ac_save_CFLAGS"

       LIBS="$ac_save_LIBS"

     fi

  fi

  if test "x$no_glib" = x ; then

     AC_MSG_RESULT(yes (version $glib_config_major_version.$glib_config_minor_version.$glib_config_micro_version))

     ifelse([$2], , :, [$2])     

  else

     AC_MSG_RESULT(no)

     if test "$PKG_CONFIG" = "no" ; then

       echo "*** A new enough version of pkg-config was not found."

       echo "*** See http://www.freedesktop.org/software/pkgconfig/"

     else

       if test -f conf.glibtest ; then

        :

       else

          echo "*** Could not run GLIB test program, checking why..."

          ac_save_CFLAGS="$CFLAGS"

          ac_save_LIBS="$LIBS"

          CFLAGS="$CFLAGS $GLIB_CFLAGS"

          LIBS="$LIBS $GLIB_LIBS"

          AC_TRY_LINK([

#include <glib.h>

#include <stdio.h>

],      [ return ((glib_major_version) || (glib_minor_version) || (glib_micro_version)); ],

        [ echo "*** The test program compiled, but did not run. This usually means"

          echo "*** that the run-time linker is not finding GLIB or finding the wrong"

          echo "*** version of GLIB. If it is not finding GLIB, 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 GLIB is incorrectly installed."])

          CFLAGS="$ac_save_CFLAGS"

          LIBS="$ac_save_LIBS"

       fi

     fi

     GLIB_CFLAGS=""

     GLIB_LIBS=""

     GLIB_GENMARSHAL=""

     GOBJECT_QUERY=""

     GLIB_MKENUMS=""

     ifelse([$3], , :, [$3])

  fi

  AC_SUBST(GLIB_CFLAGS)

  AC_SUBST(GLIB_LIBS)

  AC_SUBST(GLIB_GENMARSHAL)

  AC_SUBST(GOBJECT_QUERY)

  AC_SUBST(GLIB_MKENUMS)

  rm -f conf.glibtest

])