linux-kernel - Re: [PATCH 5.10 11/21] arm64: vdso32: suppress error message for make mrproper

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Date:   Fri, 19 Nov 2021 22:47:13 +0100
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Lucas Henneman <henneman@...gle.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Nathan Chancellor <nathan@...nel.org>,
        Will Deacon <will@...nel.org>
Subject: Re: [PATCH 5.10 11/21] arm64: vdso32: suppress error message for
 make mrproper

Hi!

> commit 14831fad73f5ac30ac61760487d95a538e6ab3cb upstream.
> 
> 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.

Upstream commit is fine, but 5.10 port misses the 2> part of the
change.

> +++ b/arch/arm64/kernel/vdso32/Makefile
> @@ -48,7 +48,8 @@ cc32-as-instr = $(call try-run,\
>  # As a result we set our own flags here.
>  
>  # KBUILD_CPPFLAGS and NOSTDINC_FLAGS from top-level Makefile
> -VDSO_CPPFLAGS := -D__KERNEL__ -nostdinc -isystem $(shell $(CC_COMPAT) -print-file-name=include)
> +VDSO_CPPFLAGS := -D__KERNEL__ -nostdinc
> +VDSO_CPPFLAGS += -isystem $(shell $(CC_COMPAT) -print-file-name=include)
>  VDSO_CPPFLAGS += $(LINUXINCLUDE)
>  
>  # Common C and assembly flags
>

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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