kbuild: tell sparse about the $ARCH

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]>
boxfire · Nov 14, 2019 · 80591e6 · 80591e6
1 parent 5347291
commit 80591e6
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/Makefile b/Makefile
@@ -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)