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kbuild: tell sparse about the $ARCH

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Sparse uses the same executable for all archs and uses flags
like -m64, -mbig-endian or -D__arm__ for arch-specific parameters.
But Sparse also uses value from the host machine used to build
Sparse as default value for the target machine.

This works, of course, well for native build but can create
problems when cross-compiling, like defining both '__i386__'
and '__arm__' when cross-compiling for arm on a x86-64 machine.

Fix this by explicitely telling sparse the target architecture.

Reported-by: Ben Dooks <[email protected]>
Signed-off-by: Luc Van Oostenryck <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>
This commit is contained in:
Luc Van Oostenryck 2019-11-09 13:12:16 +01:00 • committed by Masahiro Yamada
commit 80591e61a0
1 changed files with 3 additions and 0 deletions
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3
Makefile
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@ -917,6 +917,9 @@ ifeq ($(CONFIG_RELR),y)
LDFLAGS_vmlinux += --pack-dyn-relocs=relr
endif
# make the checker run with the right architecture
CHECKFLAGS += --arch=$(ARCH)
# insure the checker run with the right endianness
CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)