Commit 158ea2d2 authored Nov 14, 2021 by Gustavo A. R. Silva Committed by Linus Torvalds Nov 14, 2021

kbuild: Fix -Wimplicit-fallthrough=5 error for GCC 5.x and 6.x



-Wimplicit-fallthrough=5 was under cc-option because it was only
available in GCC 7.x and newer so the build is now broken for GCC 5.x
and 6.x:

gcc: error: unrecognized command line option '-Wimplicit-fallthrough=5';
did you mean '-Wno-fallthrough'?

Fix this by moving -Wimplicit-fallthrough=5 under cc-option.

Fixes: dee2b702 ("kconfig: Add support for -Wimplicit-fallthrough")
Reported-by: Nathan Chancellor <nathan@kernel.org>
Co-developed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent fa55b7dc

init/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -887,7 +887,7 @@ config CC_HAS_INT128

		config CC_IMPLICIT_FALLTHROUGH
		string
		default "-Wimplicit-fallthrough=5" if CC_IS_GCC
		default "-Wimplicit-fallthrough=5" if CC_IS_GCC && $(cc-option,-Wimplicit-fallthrough=5)
		default "-Wimplicit-fallthrough" if CC_IS_CLANG && $(cc-option,-Wunreachable-code-fallthrough)

		#