From f5caef19e9e4cf68a697f94b4f6f4c023079d244 Mon Sep 17 00:00:00 2001
From: Stefano Karapetsas <stefano@karapetsas.com>
Date: Sun, 3 Nov 2013 21:21:15 +0100
Subject: Add GTK3 support in configure

---
 configure.ac | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/configure.ac b/configure.ac
index af6de54..f0b6c9f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,13 +46,30 @@ GLIB_GSETTINGS
 
 DBUS_REQUIRED_VERSION=0.30
 GLIB_REQUIRED_VERSION=2.15.0
-GDK_REQUIRED_VERSION=2.14.0
-GTK_REQUIRED_VERSION=2.11.5
 X11_REQUIRED_VERSION=1.0
 LIBMATE_MENU_REQUIRED_VERSION=1.5.0
 MATE_DESKTOP_REQUIRED_VERSION=1.5.3
 LIBMATEKBDUI_REQUIRED_VERSION=1.5.0
 
+AC_MSG_CHECKING([which gtk+ version to compile against])
+AC_ARG_WITH([gtk],
+  [AS_HELP_STRING([--with-gtk=2.0|3.0],[which gtk+ version to compile against (default: 2.0)])],
+  [case "$with_gtk" in
+     2.0|3.0) ;;
+     *) AC_MSG_ERROR([invalid gtk version specified]) ;;
+   esac],
+  [with_gtk=2.0])
+AC_MSG_RESULT([$with_gtk])
+
+case "$with_gtk" in
+  2.0) GTK_API_VERSION=2.0
+       GTK_REQUIRED_VERSION=2.14.0
+       ;;
+  3.0) GTK_API_VERSION=3.0
+       GTK_REQUIRED_VERSION=3.0.0
+       ;;
+esac
+
 AC_CHECK_HEADERS(unistd.h)
 AC_CHECK_HEADERS(crypt.h sys/select.h)
 AC_CHECK_FUNCS(select fcntl uname nice setpriority getcwd getwd putenv sbrk)
@@ -64,7 +81,7 @@ AC_CHECK_FUNCS([setresuid setenv unsetenv clearenv])
 PKG_CHECK_MODULES(MATE_SCREENSAVER,
         x11 >= $X11_REQUIRED_VERSION
         xscrnsaver
-        gtk+-2.0 >= $GTK_REQUIRED_VERSION
+        gtk+-$GTK_API_VERSION >= $GTK_REQUIRED_VERSION
         dbus-glib-1 >= $DBUS_REQUIRED_VERSION
         gio-2.0 >= $GLIB_REQUIRED_VERSION
         mate-desktop-2.0 >= $MATE_DESKTOP_REQUIRED_VERSION
@@ -75,13 +92,13 @@ AC_SUBST(MATE_SCREENSAVER_LIBS)
 PKG_CHECK_MODULES(MATE_SCREENSAVER_DIALOG,
         gio-2.0 >= $GLIB_REQUIRED_VERSION
         gthread-2.0
-        gtk+-2.0 >= $GTK_REQUIRED_VERSION)
+        gtk+-$GTK_API_VERSION >= $GTK_REQUIRED_VERSION)
 AC_SUBST(MATE_SCREENSAVER_DIALOG_CFLAGS)
 AC_SUBST(MATE_SCREENSAVER_DIALOG_LIBS)
 
 PKG_CHECK_MODULES(MATE_SCREENSAVER_CAPPLET,
         gio-2.0 >= $GLIB_REQUIRED_VERSION
-        gtk+-2.0 >= $GTK_REQUIRED_VERSION
+        gtk+-$GTK_API_VERSION >= $GTK_REQUIRED_VERSION
         libmate-menu >= $LIBMATE_MENU_REQUIRED_VERSION)
 AC_SUBST(MATE_SCREENSAVER_CAPPLET_CFLAGS)
 AC_SUBST(MATE_SCREENSAVER_CAPPLET_LIBS)
@@ -111,7 +128,7 @@ esac
 
 # Optional dependencies for the theme engines
 
-SAVER_MODULES="gthread-2.0 gtk+-2.0 >= $GTK_REQUIRED_VERSION gobject-2.0 >= $GLIB_REQUIRED_VERSION"
+SAVER_MODULES="gthread-2.0 gtk+-$GTK_API_VERSION >= $GTK_REQUIRED_VERSION gobject-2.0 >= $GLIB_REQUIRED_VERSION"
 
 PKG_CHECK_MODULES(MATE_SCREENSAVER_SAVER, $SAVER_MODULES)
 AC_SUBST(MATE_SCREENSAVER_SAVER_CFLAGS)
@@ -175,7 +192,7 @@ AC_SUBST(PAM_PREFIX)
 # Desktop entry handling
 
 PKG_CHECK_MODULES(LIB_MATE_MENU,
-        gtk+-2.0 >= $GTK_REQUIRED_VERSION)
+        gtk+-$GTK_API_VERSION >= $GTK_REQUIRED_VERSION)
 
 AC_SUBST(LIB_MATE_MENU_CFLAGS)
 AC_SUBST(LIB_MATE_MENU_LIBS)
@@ -1142,6 +1159,7 @@ echo "
         Docs enabled:             ${enable_docbook_docs}
 
         GL:                       ${have_libgl}
+        GTK+ API version:         ${GTK_API_VERSION}
 
         Screen locking enabled:   ${enable_locking}
         Show keyboard indicator:  ${with_kbd_layout_indicator}
-- 
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