Make sparse pick up the gcc internal include directory automatically.

m68k used to do this by hand, but it really ends up being needed
for any environment that does cross-builds, so just do it
unconditionally.

This should mean that you never need to cross-build sparse or
have any other hacks for checking a cross-built environment.

arch/m68k/Makefile

@@ -28,7 +28,7 @@ ifdef CONFIG_SUN3
 LDFLAGS_vmlinux = -N
 endif
 
-CHECKFLAGS += -D__mc68000__ -I$(shell $(CC) -print-file-name=include)
+CHECKFLAGS += -D__mc68000__
 
 # without -fno-strength-reduce the 53c7xx.c driver fails ;-(
 CFLAGS += -pipe -fno-strength-reduce -ffixed-a2

scripts/Makefile.build

@@ -83,6 +83,7 @@ __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
 
 # Linus' kernel sanity checking tool
 ifneq ($(KBUILD_CHECKSRC),0)
+  CHECKFLAGS += -I$(shell $(CC) -print-file-name=include)
   ifeq ($(KBUILD_CHECKSRC),2)
     quiet_cmd_force_checksrc = CHECK   $<
           cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;