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# DP: Build libitm with -U_FORTIFY_SOURCE on x86 and x86_64.
--- a/src/libitm/configure.tgt
+++ b/src/libitm/configure.tgt
@@ -119,6 +119,12 @@ case "${target_cpu}" in
;;
esac
+# FIXME: ftbfs with -D_FORTIFY_SOURCE (error: invalid use of '__builtin_va_arg_pack ())
+case "${target}" in
+ *-*-linux*)
+ XCFLAGS="${XCFLAGS} -U_FORTIFY_SOURCE"
+esac
+
# For the benefit of top-level configure, determine if the cpu is supported.
test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1
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