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-rw-r--r--config.h.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/config.h.in b/config.h.in
index 5bafd13a6e..b3dd601f3b 100644
--- a/config.h.in
+++ b/config.h.in
@@ -4,7 +4,7 @@
/* Another evil option when it comes to compiling the C library is
--ffast-math since it alters the ABI. */
-#ifdef __FAST_MATH__
+#if defined __FAST_MATH__ && !defined TEST_FAST_MATH
# error "glibc must not be compiled with -ffast-math"
#endif