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-rw-r--r--string/string.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/string/string.h b/string/string.h
index 9226850640..5ded08f58b 100644
--- a/string/string.h
+++ b/string/string.h
@@ -239,7 +239,8 @@ extern int ffs __P ((int __i)) __attribute__ ((const));
 # ifdef	__USE_GNU
 extern int ffsl __P ((long int __l)) __attribute__ ((const));
 #  ifdef __GNUC__
-extern int ffsll __P ((long long int __ll)) __attribute__ ((const));
+__extension__ extern int ffsll __P ((long long int __ll))
+     __attribute__ ((const));
 #  endif
 # endif