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-rw-r--r--gcc/config/float-i32.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/config/float-i32.h b/gcc/config/float-i32.h
index 27e3394a5fb..3e633d8f38d 100644
--- a/gcc/config/float-i32.h
+++ b/gcc/config/float-i32.h
@@ -93,7 +93,7 @@
#undef LDBL_MAX_10_EXP
#define LDBL_MAX_10_EXP 38
-#if __STDC_VERSION__ >= 199901L
+#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
/* The floating-point expression evaluation method.
-1 indeterminate
0 evaluate all operations and constants just to the range and