diff -up giflib-4.2.1/configure.ac.automake-1_13 giflib-4.2.1/configure.ac
--- giflib-4.2.1/configure.ac.automake-1_13	2012-10-09 05:35:05.000000000 +0200
+++ giflib-4.2.1/configure.ac	2013-01-04 09:24:45.169760159 +0100
@@ -5,7 +5,7 @@ AM_INIT_AUTOMAKE([gnu dist-bzip2 -Wall])
 
 dnl Note: config.h is not used in the current build
 dnl We leave this in place only to supptess an error message at autogen time
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 
 dnl Checks for programs.
 AC_PROG_LIBTOOL