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-rw-r--r--math/math.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/math/math.h b/math/math.h
index d7487dda4a..2a5f8d3821 100644
--- a/math/math.h
+++ b/math/math.h
@@ -312,6 +312,13 @@ extern int matherr __P ((struct exception *__exc));
 #endif
 
 
+/* When compiling in strict ISO C compatible mode we must not use the
+   inline functions since they, among other things, do not set the
+   `errno' variable correctly.  */
+#if defined __STRICT_ANSI__ && !defined __NO_MATH_INLINES
+# define __NO_MATH_INLINES	1
+#endif
+
 /* Get machine-dependent inline versions (if there are any).  */
 #ifdef __USE_EXTERN_INLINES
 # include <bits/mathinline.h>