From: Nathan Chancellor <nathan@kernel.org>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
llvm@lists.linux.dev, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Lucas Henneman <henneman@google.com>,
Masahiro Yamada <masahiroy@kernel.org>
Subject: Re: [PATCH v2 3/4] arm64: vdso32: suppress error message for 'make mrproper'
Date: Tue, 19 Oct 2021 17:50:09 -0700 [thread overview]
Message-ID: <YW9nwT2m7Ft30BSm@archlinux-ax161> (raw)
In-Reply-To: <20211019223646.1146945-4-ndesaulniers@google.com>
On Tue, Oct 19, 2021 at 03:36:45PM -0700, Nick Desaulniers wrote:
> When running the following command without arm-linux-gnueabi-gcc in
> one's $PATH, the following warning is observed:
>
> $ ARCH=arm64 CROSS_COMPILE_COMPAT=arm-linux-gnueabi- make -j72 LLVM=1 mrproper
> make[1]: arm-linux-gnueabi-gcc: No such file or directory
>
> This is because KCONFIG is not run for mrproper, so CONFIG_CC_IS_CLANG
> is not set, and we end up eagerly evaluating various variables that try
> to invoke CC_COMPAT.
>
> This is a similar problem to what was observed in
> commit dc960bfeedb0 ("h8300: suppress error messages for 'make clean'")
>
> Reported-by: Lucas Henneman <henneman@google.com>
> Suggested-by: Masahiro Yamada <masahiroy@kernel.org>
> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
> ---
> Changes v1 -> v2:
> * Change to suppressing via redirecting stderr to /dev/null, as per
> Masahiro.
> * Add Masahiro's SB tag.
> * Cite dc960bfeedb0.
>
> arch/arm64/kernel/vdso32/Makefile | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
> index 1407516e041e..e478cebb9891 100644
> --- a/arch/arm64/kernel/vdso32/Makefile
> +++ b/arch/arm64/kernel/vdso32/Makefile
> @@ -38,7 +38,8 @@ cc32-disable-warning = $(call try-run,\
> # As a result we set our own flags here.
>
> # KBUILD_CPPFLAGS and NOSTDINC_FLAGS from top-level Makefile
> -VDSO_CPPFLAGS := -DBUILD_VDSO -D__KERNEL__ -nostdinc -isystem $(shell $(CC_COMPAT) -print-file-name=include)
> +VDSO_CPPFLAGS := -DBUILD_VDSO -D__KERNEL__ -nostdinc
> +VDSO_CPPFLAGS += -isystem $(shell $(CC_COMPAT) -print-file-name=include 2>/dev/null)
> VDSO_CPPFLAGS += $(LINUXINCLUDE)
>
> # Common C and assembly flags
> --
> 2.33.0.1079.g6e70778dc9-goog
>
>
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next prev parent reply other threads:[~2021-10-20 0:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-19 22:36 [PATCH v2 0/4] compat vdso cleanups Nick Desaulniers
2021-10-19 22:36 ` [PATCH v2 1/4] arm64: vdso32: drop the test for dmb ishld Nick Desaulniers
2021-10-20 0:42 ` Nathan Chancellor
2021-10-20 7:51 ` Vincenzo Frascino
2021-10-19 22:36 ` [PATCH v2 2/4] arm64: vdso32: drop test for -march=armv8-a Nick Desaulniers
2021-10-20 0:43 ` Nathan Chancellor
2021-10-20 7:52 ` Vincenzo Frascino
2021-10-19 22:36 ` [PATCH v2 3/4] arm64: vdso32: suppress error message for 'make mrproper' Nick Desaulniers
2021-10-20 0:50 ` Nathan Chancellor [this message]
2021-10-20 7:54 ` Vincenzo Frascino
2021-10-19 22:36 ` [PATCH v2 4/4] arm64: vdso32: require CROSS_COMPILE_COMPAT for gcc+bfd Nick Desaulniers
2021-10-20 9:08 ` Vincenzo Frascino
2021-10-21 10:05 ` [PATCH v2 0/4] compat vdso cleanups Will Deacon
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