LU-15492 build: fallthrough macro for pre/post gcc-7

[fs/lustre-release.git] / lustre / include / lustre / lustreapi.h

diff --git a/lustre/include/lustre/lustreapi.h b/lustre/include/lustre/lustreapi.h
index 4c60b6e..caaa780 100644 (file)
--- a/lustre/include/lustre/lustreapi.h
+++ b/lustre/include/lustre/lustreapi.h
@@ -62,7 +62,11 @@ extern "C" {
 #endif
 
 #ifndef fallthrough
-#define fallthrough do {} while (0)  /* fallthrough */
+# if defined(__GNUC__) && __GNUC__ >= 7
+#  define fallthrough  __attribute__((fallthrough)) /* fallthrough */
+# else
+#  define fallthrough do {} while (0)  /* fallthrough */
+# endif
 #endif
 
 typedef struct statx lstatx_t;