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glibc-rh1293976-2.patch introduced a -Wundef warning related to the
POWER architecture preprocessor macros. No upstream patch because
upstream has fixed the underlying malloc alignment issue on 32-bit POWER
this portion of the code attempts to work around.
diff --git a/malloc/tst-malloc-thread-fail.c b/malloc/tst-malloc-thread-fail.c
index 7edcd7122fb084b7..5dfb24f5a3154fd7 100644
--- a/malloc/tst-malloc-thread-fail.c
+++ b/malloc/tst-malloc-thread-fail.c
@@ -156,7 +156,7 @@ static void *
allocate (void)
{
struct allocate_result r = allocate_1 ();
-#if __powerpc__ == 1 && __powerpc64__ == 0
+#if defined (__powerpc__) == 1 && !defined (__powerpc64__)
/* Sourceware bug 6527 on 32-bit POWER.
Ignore 16-byte alignment requirement when using malloc, realloc, or
calloc, since these functions are known not to provide enough