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-rw-r--r--gcc/system.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/system.h b/gcc/system.h
index 48c9c894e34..ed36bae3e3b 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -638,6 +638,11 @@ extern int vsnprintf(char *, size_t, const char *, va_list);
/* Get libiberty declarations. */
#include "libiberty.h"
+#undef FFS /* Some systems predefine this symbol; don't let it interfere. */
+#undef FLOAT /* Likewise. */
+#undef ABS /* Likewise. */
+#undef PC /* Likewise. */
+
/* Provide a default for the HOST_BIT_BUCKET.
This suffices for POSIX-like hosts. */