linux-kernel - [PATCH] kbuild: do not pass $(KBUILD_CFLAGS) to scripts/mkcompile

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Message-Id: <20200403212459.13914-1-masahiroy@kernel.org>
Date:   Sat,  4 Apr 2020 06:24:59 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] kbuild: do not pass $(KBUILD_CFLAGS) to scripts/mkcompile_h

scripts/mkcompile_h uses $(CC) only for getting the version string.

I suspected there was a specific reason why the additional flags were
needed, and dug the commit history. This code dates back to at least
2002 [1], but I could not get any more clue.

Just get rid of it.

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/history/history.git/commit/?id=29f3df7eba8ddf91a55183f9967f76fbcc3ab742

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 init/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/init/Makefile b/init/Makefile
index 30aa8ab11120..d45e967483b2 100644
--- a/init/Makefile
+++ b/init/Makefile
@@ -35,4 +35,4 @@ include/generated/compile.h: FORCE
 	@$($(quiet)chk_compile.h)
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@	\
 	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)"	\
-	"$(CONFIG_PREEMPT_RT)" "$(CC) $(KBUILD_CFLAGS)" "$(LD)"
+	"$(CONFIG_PREEMPT_RT)" "$(CC)" "$(LD)"
-- 
2.17.1