Bump autoconf requirement to 2.60

Since ae63479 we use AC_PROG_CC_C99 which was introduced in autoconf 2.60.

Unfortunately this means you can't build from git anymore on RHEL5, but
so be it. Building from tarball of course still works.

diff --git a/configure.ac b/configure.ac
index 5171dec..2ac9c72 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
+AC_PREREQ([2.60])
 AC_INIT([collectd],[m4_esyscmd(./version-gen.sh)])
 AC_CONFIG_SRCDIR(src/target_set.c)
 AC_CONFIG_HEADERS(src/config.h)