X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=os.h;h=da80fbd4f7207e66a0cbb9821bdfabcf389f6ebf;hb=b2fdda43cf0699f60e711429c778ff1685e30062;hp=a2699dd2d0b14e69c5091e412bf20a2dab32045f;hpb=0268b8ba7b2c79c669323cb1fcc0b045b84313f1;p=fio.git

diff --git a/os.h b/os.h
index a2699dd2..da80fbd4 100644
--- a/os.h
+++ b/os.h
@@ -54,4 +54,10 @@
 #define FIO_HUGE_PAGE			(4096 * 1024)
 #endif
 
+#if __GNUC__ < 3
+#define __must_check
+#else
+#define __must_check			__attribute__((warn_unused_result))
+#endif
+
 #endif