Basic implementation of 'make headers_check'

Based on the 'headers_install' target, this performs a basic sanity check
on the exported headers -- so far only checking that they do not include
any other headers which aren't selected for import, but easily extendable.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 98e5af72983f..dbab1a9eabeb 100644
--- a/Makefile
+++ b/Makefile
@@ -866,6 +866,10 @@ headers_install: include/linux/version.h
         $(Q)rm -rf $(INSTALL_HDR_PATH)/include
         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include
 
+PHONY += headers_check
+headers_check: headers_install
+        $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
+
 # ---------------------------------------------------------------------------
 # Modules