File giflib-4.1.6-windows.patch of Package mingw64-giflib

--- giflib-4.1.6/configure.ac	2007-11-10 23:49:15.000000000 +0100
+++ giflib-4.1.6/configure.ac	2013-04-18 17:43:54.459335949 +0200
@@ -2,9 +2,10 @@
 AC_INIT(giflib, [4.1.6], [abadger1999@sourceforge.net], giflib)
 AC_CONFIG_SRCDIR([lib/dgif_lib.c])
 AM_INIT_AUTOMAKE([gnu check-news dist-bzip2 -Wall])
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 
 dnl Checks for programs.
+m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 AC_PROG_LIBTOOL
 AC_PROG_CC
 AC_PROG_CPP
--- giflib-4.1.6/lib/Makefile.am	2007-11-10 23:47:55.000000000 +0100
+++ giflib-4.1.6/lib/Makefile.am	2013-04-18 17:41:11.717188551 +0200
@@ -21,6 +21,6 @@
                     quantize.c  \
 					gif_lib_private.h
 
-libgif_la_LDFLAGS = -version-info 5:6:1
+libgif_la_LDFLAGS = -version-info 5:6:1 -no-undefined
 libgif_la_LIBADD = @DEVS@
 libgif_CFLAGS = $(X_CFLAGS) $(AM_CFLAGS)