make math.h compatibe with c89

diff --git a/include/math.h b/include/math.h
index 1a5f6fe9a4969c1be02810c2ceef6e11bc921235..4af75ed735f85f15020479271b8a57fff3b85161 100644 (file)
--- a/include/math.h
+++ b/include/math.h
@@ -52,7 +52,11 @@ int __fpclassifyl(long double);
 
 #define isunordered(x,y) (isnan((x)) ? ((y),1) : isnan((y)))
 
-static inline int __isrel(long double __x, long double __y, int __rel)
+static
+#if __STDC_VERSION >= 199901L
+inline
+#endif
+int __isrel(long double __x, long double __y, int __rel)
 {
        if (isunordered(__x, __y)) return 0;
        if (__rel==-2) return __x < __y;