kbuild: use in-kernel unifdef
Let headers_install use in-kernel unifdef
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/Makefile b/Makefile
index edfc2fd..b06b1ea 100644
--- a/Makefile
+++ b/Makefile
@@ -893,8 +893,8 @@
export INSTALL_HDR_PATH
PHONY += headers_install
-headers_install: include/linux/version.h
- $(Q)unifdef -Ux /dev/null
+headers_install: include/linux/version.h scripts_basic FORCE
+ $(Q)$(MAKE) $(build)=scripts scripts/unifdef
$(Q)rm -rf $(INSTALL_HDR_PATH)/include
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include