* [PATCH v2] kbuild: Fix -Wimplicit-fallthrough=5 error for GCC 5.x and 6.x
@ 2021-11-15 2:07 Gustavo A. R. Silva
0 siblings, 0 replies; only message in thread
From: Gustavo A. R. Silva @ 2021-11-15 2:07 UTC (permalink / raw)
To: Linus Torvalds
Cc: Nathan Chancellor, linux-kernel, Gustavo A. R. Silva,
linux-hardening, linux-kbuild
-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: dee2b702bcf0 ("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>
---
Changes in v2:
- Add Fixes tag.
init/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/init/Kconfig b/init/Kconfig
index 036b750e8d8a..85882c317235 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -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-option,-Wimplicit-fallthrough=5)
default "-Wimplicit-fallthrough" if CC_IS_CLANG && $(cc-option,-Wunreachable-code-fallthrough)
#
--
2.27.0
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2021-11-15 2:07 [PATCH v2] kbuild: Fix -Wimplicit-fallthrough=5 error for GCC 5.x and 6.x Gustavo A. R. Silva
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