configure: Check for GTK+ 3.0 and if it's not available for GTK+ 2.0

diff --git a/configure.ac b/configure.ac
index 48859f7..b3dbb95 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -242,7 +242,8 @@ AC_SUBST(GSTPB_PREFIX)
 
 dnl GTK is optional and used in examples
 if test "x$BUILD_EXAMPLES" = "xyes"; then
-  PKG_CHECK_MODULES(GTK, gtk+-2.0 >= 2.8.0, HAVE_GTK=yes, HAVE_GTK=no)
+  PKG_CHECK_MODULES(GTK, gtk+-3.0, HAVE_GTK=yes,
+  [PKG_CHECK_MODULES(GTK, gtk+-2.0 >= 2.8.0, HAVE_GTK=yes, HAVE_GTK=no)])
   AC_SUBST(GTK_LIBS)
   AC_SUBST(GTK_CFLAGS)
 fi