diff -up gtkglext-1.2.0/configure.in.automake-1_13 gtkglext-1.2.0/configure.in
--- gtkglext-1.2.0/configure.in.automake-1_13	2013-01-04 14:24:22.870596282 +0100
+++ gtkglext-1.2.0/configure.in	2013-01-04 14:25:41.019875913 +0100
@@ -89,7 +89,7 @@ cflags_set=${CFLAGS+set}
 AM_INIT_AUTOMAKE([1.7 no-define dist-bzip2 dist-zip])
 
 # Specify a configuration file
-AM_CONFIG_HEADER([config.h])
+AC_CONFIG_HEADERS([config.h])
 
 dnl Initialize maintainer mode
 AM_MAINTAINER_MODE
@@ -201,7 +201,6 @@ AC_SUBST([gtkglext_targetlib])
 AM_SANITY_CHECK
 
 # Checks for programs.
-AM_PROG_CC_STDC
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
 AC_PROG_LN_S