Commit 02e9a22c authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Masahiro Yamada
Browse files

kbuild: hdrcheck: fix cross build with clang 



The headercheck tries to call clang with a mix of compiler arguments
that don't include the target architecture. When building e.g. x86
headers on arm64, this produces a warning like

   clang: warning: unknown platform, assuming -mfloat-abi=soft

Add in the KBUILD_CPPFLAGS, which contain the target, in order to make it
build properly.

See also 1b71c2fb ("kbuild: userprogs: fix bitsize and target
detection on clang").

Reviewed-by: default avatarNathan Chancellor <nathan@kernel.org>
Fixes: feb843a4 ("kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS")
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent dfc1b168

usr/include/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -10,7 +10,7 @@ UAPI_CFLAGS := -std=c90 -Wall -Werror=implicit-function-declaration 


# In theory, we do not care -m32 or -m64 for header compile tests.

# It is here just because CONFIG_CC_CAN_LINK is tested with -m32 or -m64.

UAPI_CFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))

UAPI_CFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS))



# USERCFLAGS might contain sysroot location for CC.

UAPI_CFLAGS += $(USERCFLAGS)