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Date: Sun, 14 Nov 2021 20:07:58 -0600 From: "Gustavo A. R. Silva" <gustavoars@...nel.org> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Nathan Chancellor <nathan@...nel.org>, linux-kernel@...r.kernel.org, "Gustavo A. R. Silva" <gustavoars@...nel.org>, linux-hardening@...r.kernel.org, linux-kbuild@...r.kernel.org Subject: [PATCH v2] 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: dee2b702bcf0 ("kconfig: Add support for -Wimplicit-fallthrough") Reported-by: Nathan Chancellor <nathan@...nel.org> Co-developed-by: Nathan Chancellor <nathan@...nel.org> Signed-off-by: Nathan Chancellor <nathan@...nel.org> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.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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