[PATCH] configure.ac: Use AM_PROG_AR when it exists

[Keng-Yu Lin]

The new AM_PROG_AR macro was added in automake 1.11.2.
automake warns on this. And because the -Werror flag is default in fwts,
this breaks the Saucy build.

The patch just checks if the macro is defined. If so, just use it.

Signed-off-by: Keng-Yu Lin <kengyu at canonical.com>
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index 77d44bf..c0411c1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,6 @@
 	  AC_INIT([fwts],[0.1],[colin.king at canonical.com])
           AM_INIT_AUTOMAKE([-Wall -Werror foreign])
+          m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 	  AC_CANONICAL_HOST
 	  AC_CONFIG_MACRO_DIR([m4])
           AC_PROG_CC
-- 
1.8.1.2