--- util-macros-1.6.0/xorg-macros.m4.in.strictaliasing~ 2010-02-05 14:03:04.000000000 +0000 +++ util-macros-1.6.0/xorg-macros.m4.in 2010-02-08 09:21:10.722764263 +0000 @@ -877,7 +877,7 @@ AC_DEFUN([XORG_CWARNFLAGS], [ AC_REQUIRE([AC_PROG_CC]) if test "x$GCC" = xyes ; then CWARNFLAGS="-Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes \ --Wmissing-declarations -Wnested-externs -fno-strict-aliasing \ +-Wmissing-declarations -Wnested-externs -Wstrict-aliasing -Werror=strict-aliasing \ -Wbad-function-cast -Wformat=2" case `$CC -dumpversion` in 3.4.* | 4.*)