This patch is needed for building the package as of F-11. It can be dropped whenever autoconf 2.63 is no longer used on any live branch. diff -Naur tiff-3.9.4.orig/configure.ac tiff-3.9.4/configure.ac --- tiff-3.9.4.orig/configure.ac 2010-06-15 14:58:12.000000000 -0400 +++ tiff-3.9.4/configure.ac 2010-06-15 17:13:11.000000000 -0400 @@ -24,7 +24,7 @@ dnl Process this file with autoconf to produce a configure script. -AC_PREREQ(2.64) +AC_PREREQ(2.63) AC_INIT([LibTIFF Software],[3.9.4],[tiff@lists.maptools.org],[tiff]) AC_CONFIG_AUX_DIR(config) AC_CONFIG_MACRO_DIR(m4)