configure.ac: Use prefered AC_CONFIG_HEADERS over AM_CONFIG_HEADER
This macro is preferred by autofoo upstream. It was added around
automake 1.7, and offers backward compatibility with AM_CONFIG_HEADER.
Related: OS#3230
Change-Id: I88707d4895d9c231715d5252d2cfab589b42fe0c
diff --git a/configure.ac b/configure.ac
index 5fda6eb..5581c32 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,8 +1,7 @@
# Process this file with autoconf to produce a configure script.
AC_INIT([osmo-ggsn],[m4_esyscmd(./git-version-gen .tarball-version)],[osmocom-net-gprs@lists.osmocom.org])
AC_CONFIG_SRCDIR([gtp/gtp.c])
-AM_CONFIG_HEADER([config.h])
-#AC_CONFIG_HEADER([config.h])
+AC_CONFIG_HEADERS([config.h])
dnl *This* is the root dir, even if an install-sh exists in ../ or ../../
AC_CONFIG_AUX_DIR([.])