gtk: prefer gtk3 over gtk2

In case the configure script finds both gtk2 and gtk3 installed it
still prefers gtk2 over gtk3.  Prefer gtk3 instead.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20170606105339.3613-2-kraxel@redhat.com

diff --git a/configure b/configure
index b147191..bfba156 100755 (executable)
--- a/configure
+++ b/configure
@@ -2301,14 +2301,14 @@ fi
 # GTK probe
 
 if test "$gtkabi" = ""; then
-    # The GTK ABI was not specified explicitly, so try whether 2.0 is available.
-    # Use 3.0 as a fallback if that is available.
-    if $pkg_config --exists "gtk+-2.0 >= 2.18.0"; then
-        gtkabi=2.0
-    elif $pkg_config --exists "gtk+-3.0 >= 3.0.0"; then
+    # The GTK ABI was not specified explicitly, so try whether 3.0 is available.
+    # Use 2.0 as a fallback if that is available.
+    if $pkg_config --exists "gtk+-3.0 >= 3.0.0"; then
         gtkabi=3.0
-    else
+    elif $pkg_config --exists "gtk+-2.0 >= 2.18.0"; then
         gtkabi=2.0
+    else
+        gtkabi=3.0
     fi
 fi
 
@@ -2331,7 +2331,7 @@ if test "$gtk" != "no"; then
         libs_softmmu="$gtk_libs $libs_softmmu"
         gtk="yes"
     elif test "$gtk" = "yes"; then
-        feature_not_found "gtk" "Install gtk2 or gtk3 devel"
+        feature_not_found "gtk" "Install gtk3-devel"
     else
         gtk="no"
     fi