build: support for automake-1.12

automake-1.12 wants that AM_PROG_AR be used when LT_INIT is.

Signed-off-by: Jan Engelhardt <jengelh@inai.de>

diff --git a/configure.ac b/configure.ac
index 179c2d822ca21793edb4a93a7927de7bc545370a..861f5b3e7d06e97f294f47bc8ee66d47532e16d8 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -13,6 +13,7 @@ AM_INIT_AUTOMAKE([-Wall])
 AC_PROG_CC
 AM_PROG_CC_C_O
 AC_DISABLE_STATIC
+m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 AM_PROG_LIBTOOL
 
 AC_ARG_WITH([kernel],