autoconf: require libtool minimum level 2.2

This is the updated minimum level as referenced in:
http://www.x.org/wiki/Building_the_X_Window_System/#index2h3

Libtool version 2 has been used for several years now. There should be
no surprises.

Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Gaetan Nadon <memsize@videotron.ca>

diff --git a/configure.ac b/configure.ac
index cba8ade..eeb76a3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -20,8 +20,8 @@ AM_PATH_PYTHON([2.6])
 AC_USE_SYSTEM_EXTENSIONS
 
 # Initialize libtool
-AC_LIBTOOL_WIN32_DLL
-AC_PROG_LIBTOOL
+LT_PREREQ([2.2])
+LT_INIT([win32-dll])
 
 # Require xorg-macros minimum of 1.18 - Initial version
 m4_ifndef([XORG_MACROS_VERSION],