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# Configure paths for GtkGLExt
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# Shamelessly stolen from gtk-2.0.m4
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# Configure paths for GTK+
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# Owen Taylor 1997-2001
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dnl AM_PATH_GTKGLEXT_1_0([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
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dnl Test for GtkGLExt, and define GTKGLEXT_CFLAGS and GTKGLEXT_LIBS.
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AC_DEFUN([AM_PATH_GTKGLEXT_1_0],
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# GtkGLExt pkg-config module
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gtkglext_module=gtkglext-1.0
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# minimum GtkGLExt version
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gtkglext_min_version=ifelse([$1], ,1.0.0,$1)
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# minimum pkg-config version
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pkgconfig_min_version=0.7
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AC_ARG_ENABLE(gtkglext-test,
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[ --disable-gtkglext-test do not try to compile and run a test GtkGLExt program],
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, enable_gtkglext_test=yes)
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dnl Get the cflags and libraries from pkg-config
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pkg_config_modules=$gtkglext_module
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AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
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if test x$PKG_CONFIG != xno ; then
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if pkg-config --atleast-pkgconfig-version $pkgconfig_min_version ; then
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echo "*** pkg-config too old; version $pkgconfig_min_version or better required."
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AC_MSG_CHECKING(for GtkGLExt - version >= $gtkglext_min_version)
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if test x$PKG_CONFIG != xno ; then
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## don't try to run the test against uninstalled libtool libs
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if $PKG_CONFIG --uninstalled $pkg_config_modules; then
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echo "Will use uninstalled version of GtkGLExt found in PKG_CONFIG_PATH"
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enable_gtkglext_test=no
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if $PKG_CONFIG --atleast-version $gtkglext_min_version $pkg_config_modules; then
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echo "*** pkg-config cannot find $gtkglext_module >= $gtkglext_min_version"
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echo "*** Set the environment variable PKG_CONFIG_PATH to point to the correct"
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echo "*** configuration files."
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enable_gtkglext_test=no
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if test x"$no_gtkglext" = x ; then
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GTKGLEXT_CFLAGS=`$PKG_CONFIG --cflags $pkg_config_modules`
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GTKGLEXT_LIBS=`$PKG_CONFIG --libs $pkg_config_modules`
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gtkglext_config_major_version=`$PKG_CONFIG --modversion $gtkglext_module | \
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sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
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gtkglext_config_minor_version=`$PKG_CONFIG --modversion $gtkglext_module | \
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sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
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gtkglext_config_micro_version=`$PKG_CONFIG --modversion $gtkglext_module | \
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sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
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if test "x$enable_gtkglext_test" = "xyes" ; then
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ac_save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $GTKGLEXT_CFLAGS"
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LIBS="$GTKGLEXT_LIBS $LIBS"
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dnl Now check if the installed GtkGLExt is sufficiently new. (Also sanity
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dnl checks the results of pkg-config to some extent)
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#include <gtk/gtkgl.h>
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int major, minor, micro;
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system ("touch conf.gtkgltest");
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/* HP/UX 9 (%@#!) writes to sscanf strings */
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tmp_version = g_strdup ("$gtkglext_min_version");
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if (sscanf (tmp_version, "%d.%d.%d", &major, &minor, µ) != 3)
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printf ("%s, bad version string\n", "$gtkglext_min_version");
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if ((gtkglext_major_version != $gtkglext_config_major_version) ||
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(gtkglext_minor_version != $gtkglext_config_minor_version) ||
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(gtkglext_micro_version != $gtkglext_config_micro_version))
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printf ("\n*** 'pkg-config --modversion $gtkglext_module' returned %d.%d.%d, but GtkGLExt\n",
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$gtkglext_config_major_version, $gtkglext_config_minor_version, $gtkglext_config_micro_version);
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printf ("*** library %d.%d.%d was found!\n",
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gtkglext_major_version, gtkglext_minor_version, gtkglext_micro_version);
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printf ("*** If pkg-config was correct, then it is best to remove the old version\n");
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printf ("*** of GtkGLExt. You may also be able to fix the error by modifying your\n");
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printf ("*** LD_LIBRARY_PATH enviroment variable, or by editing /etc/ld.so.conf.\n");
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printf ("*** Make sure you have run ldconfig if that is required on your system.\n");
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printf ("*** If pkg-config was wrong, set the environment variable PKG_CONFIG_PATH\n");
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printf ("*** to point to the correct configuration files.\n");
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else if ((gtkglext_major_version != GTKGLEXT_MAJOR_VERSION) ||
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(gtkglext_minor_version != GTKGLEXT_MINOR_VERSION) ||
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(gtkglext_micro_version != GTKGLEXT_MICRO_VERSION))
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printf ("\n*** GtkGLExt header files (version %d.%d.%d) do not match library (version %d.%d.%d).\n",
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GTKGLEXT_MAJOR_VERSION, GTKGLEXT_MINOR_VERSION, GTKGLEXT_MICRO_VERSION,
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gtkglext_major_version, gtkglext_minor_version, gtkglext_micro_version);
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if ((gtkglext_major_version > major) ||
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((gtkglext_major_version == major) && (gtkglext_minor_version > minor)) ||
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((gtkglext_major_version == major) && (gtkglext_minor_version == minor) && (gtkglext_micro_version >= micro)))
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printf ("\n*** An old version of GtkGLExt library (%d.%d.%d) was found.\n",
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gtkglext_major_version, gtkglext_minor_version, gtkglext_micro_version);
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printf ("*** You need a version of GtkGLExt newer than %d.%d.%d. The latest version of\n",
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major, minor, micro);
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printf ("*** GtkGLExt is always available from http://gtkglext.sourceforge.net/.\n");
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printf ("*** If you have already installed a sufficiently new version, this error\n");
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printf ("*** probably means that the wrong copy of the pkg-config shell script is\n");
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printf ("*** being found. The easiest way to fix this is to remove the old version\n");
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printf ("*** of GtkGLExt, but you can also set the PKG_CONFIG environment to point\n");
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printf ("*** to the correct copy of pkg-config. (In this case, you will have to\n");
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printf ("*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n");
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printf ("*** so that the correct libraries are found at run-time)\n");
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],, no_gtkglext=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
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CFLAGS="$ac_save_CFLAGS"
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if test "x$no_gtkglext" = x ; then
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AC_MSG_RESULT(yes (version $gtkglext_config_major_version.$gtkglext_config_minor_version.$gtkglext_config_micro_version))
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ifelse([$2], , :, [$2])
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if test "$PKG_CONFIG" = "no" ; then
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echo "*** A new enough version of pkg-config was not found."
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echo "*** See http://www.freedesktop.org/software/pkgconfig/."
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elif test "x$enable_gtkglext_test" = "xyes" ; then
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if test -f conf.gtkgltest ; then
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echo "*** Could not run GtkGLExt test program, checking why..."
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ac_save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $GTKGLEXT_CFLAGS"
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LIBS="$LIBS $GTKGLEXT_LIBS"
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#include <gtk/gtkgl.h>
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], [ return ((gtkglext_major_version) || (gtkglext_minor_version) || (gtkglext_micro_version)); ],
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[ echo "*** The test program compiled, but did not run. This usually means"
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echo "*** that the run-time linker is not finding GtkGLExt or finding the wrong"
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echo "*** version of GtkGLExt. If it is not finding GtkGLExt, you'll need to set your"
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echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
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echo "*** to the installed location Also, make sure you have run ldconfig if that"
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echo "*** is required on your system"
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echo "*** If you have an old version installed, it is best to remove it, although"
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echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH" ],
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[ echo "*** The test program failed to compile or link. See the file config.log for the"
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echo "*** exact error that occured. This usually means GtkGLExt is incorrectly installed."])
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CFLAGS="$ac_save_CFLAGS"
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ifelse([$3], , :, [$3])
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AC_SUBST(GTKGLEXT_CFLAGS)
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AC_SUBST(GTKGLEXT_LIBS)
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dnl AC_GTKGLEXT_SUPPORTS_MULTIHEAD([ACTION-IF-SUPPORTED [, ACTION-IF-NOT-SUPPORTED]])
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dnl Checks whether GtkGLExt supports multihead.
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AC_DEFUN([AC_GTKGLEXT_SUPPORTS_MULTIHEAD],
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[ AC_CACHE_CHECK([whether GtkGLExt supports multihead],
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[ac_cv_gtkglext_supports_multihead],
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[AC_TRY_LINK([#include <gdk/gdkglquery.h>],
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[gdk_gl_query_extension_for_display(gdk_display_get_default());],
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[ac_cv_gtkglext_supports_multihead=yes],
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[ac_cv_gtkglext_supports_multihead=no])])
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if test "x$ac_cv_gtkglext_supports_multihead" = "xyes" ; then
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ifelse([$1], , :, [$1])
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ifelse([$2], , :, [$2])
added
removed
m4macros/gtkglext.m4
