5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Arnd Bergmann arnd@arndb.de
commit 02e9a22ceef0227175e391902d8760425fa072c6 upstream.
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 1b71c2fb04e7 ("kbuild: userprogs: fix bitsize and target detection on clang").
Reviewed-by: Nathan Chancellor nathan@kernel.org Fixes: feb843a469fb ("kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS") Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- usr/include/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/usr/include/Makefile +++ b/usr/include/Makefile @@ -10,7 +10,7 @@ UAPI_CFLAGS := -std=c90 -Wall -Werror=im
# 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, $(KBUILD_CFLAGS)) +UAPI_CFLAGS += $(filter -m32 -m64, $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS))
override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I$(objtree)/usr/include