Commit d8aa9b09 authored Dec 02, 2021 by Nick Desaulniers

BACKPORT: arm64: vdso32: suppress error message for 'make mrproper'



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.

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>
[nd: adjusted context due to missing e35123d83ee3]
[nd: backported because Android backported compat vdso support to 4.19.y]
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20211019223646.1146945-4-ndesaulniers@google.com


Signed-off-by: Will Deacon <will@kernel.org>
Bug: 202827173
Change-Id: Ic1ad9eb2871fd4f6c4f0e27df673df5cb4012df9

parent c8fea9b9

arch/arm64/kernel/vdso32/Makefile

+2 −1

Original line number	Diff line number	Diff line
		@@ -40,7 +40,8 @@ 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 2>/dev/null)
		VDSO_CPPFLAGS += $(LINUXINCLUDE)

		# Common C and assembly flags