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-rw-r--r--includes/Stg.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/includes/Stg.h b/includes/Stg.h
index 9b54526342..57cb00d0a4 100644
--- a/includes/Stg.h
+++ b/includes/Stg.h
@@ -197,7 +197,11 @@
#endif
/* Used to mark a switch case that falls-through */
-#if (defined(__GNUC__) && __GNUC__ >= 7) || defined(__clang__)
+#if (defined(__GNUC__) && __GNUC__ >= 7)
+// N.B. Don't enable fallthrough annotations when compiling with Clang.
+// Apparently clang doesn't enable implicitly fallthrough warnings by default
+// http://llvm.org/viewvc/llvm-project?revision=167655&view=revision
+// when compiling C and the attribute cause warnings of their own (#16019).
#define FALLTHROUGH GNU_ATTRIBUTE(fallthrough)
#else
#define FALLTHROUGH ((void)0)