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-rw-r--r--include/features.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/features.h b/include/features.h
index 7f99741a95..18f743cb75 100644
--- a/include/features.h
+++ b/include/features.h
@@ -341,7 +341,8 @@
 
 /* Decide whether we can define 'extern inline' functions in headers.  */
 #if __GNUC_PREREQ (2, 7) && defined __OPTIMIZE__ \
-    && !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__
+    && !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__ \
+    && defined __extern_inline
 # define __USE_EXTERN_INLINES	1
 #endif