Use __STDC_VERSION__ not __STDC_VERSION.

diff --git a/include/features.h b/include/features.h
index 366fcc5..5e39b7f 100644 (file)
--- a/include/features.h
+++ b/include/features.h
@@ -281,7 +281,7 @@
 #if defined __GNUC__ \
     || (defined __PGI && defined __i386__ ) \
     || (defined __INTEL_COMPILER && (defined __i386__ || defined __ia64__)) \
-    || (defined __STDC_VERSION && __STDC_VERSION >= 199901L)
+    || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
 # define __GLIBC_HAVE_LONG_LONG        1
 #endif