__attribute__((fallthrough)) only when -Wimplicit-fallthrough (#7448)

That is version 7 or greater
https://developers.redhat.com/blog/2017/03/10/wimplicit-fallthrough-in-gcc-7/

Fix regression of https://github.com/elogind/elogind/pull/7389
82a27ba8217d09e4fef4c9550f8b733d174c5705
on older gccs

bumping to re-run CI
upstream             FAIL timed out
boot-smoke           FAIL non-zero exit status 1

diff --git a/src/basic/macro.h b/src/basic/macro.h
index 34e0657ac764c2abf815f0e60afe080065d8794d..c5671d7db6d2498cb6cae340d67f02a8574ad969 100644 (file)
--- a/src/basic/macro.h
+++ b/src/basic/macro.h
@@ -47,7 +47,11 @@
 #define _weakref_(x) __attribute__((weakref(#x)))
 #define _alignas_(x) __attribute__((aligned(__alignof(x))))
 #define _cleanup_(x) __attribute__((cleanup(x)))
+#if __GNUC__ >= 7
 #define _fallthrough_ __attribute__((fallthrough))
+#else
+#define _fallthrough_
+#endif
 
 /* Temporarily disable some warnings */
 #define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT                     \