work with newer versions of automake

when using a newer automake, the autoreconf step fails with warnings:
"linking libtool libraries using a non-POSIX archiver requires 'AM_PROG_AR' in 'configure.ac' "

This happens for instance on ubuntu 13.10.
Doing just that, adding 'AM_PROG_AR' to configure.ac fixes the problem.

diff --git a/configure.ac b/configure.ac
index e9a069fc22367b323f76a52a367a546d48d9b306..41b6e5047b44b1c5117adc7224d8aa5affce684d 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -8,6 +8,7 @@ AC_PREREQ([2.61])
 AC_CONFIG_AUX_DIR([config])
 AM_INIT_AUTOMAKE([parallel-tests foreign -Wall])
 AM_SILENT_RULES([yes])
+AM_PROG_AR
 AC_PROG_CC
 AC_PROG_CC_STDC
 AC_PROG_CPP_WERROR