use-kbuild-compiler.patch

Author: Luca Boccassi <luca.boccassi@gmail.com>
Description: let Kbuild set the compiler version
 If CC=cc is passed to make, the default system compiler will be used. But we
 want to build the kernel modules with the same compiler version used to build
 the kernel itself. Remove the CC parameter from upstream's Makefile's make
 invocation.

--- a/Makefile
+++ b/Makefile
@@ -82,8 +82,8 @@ else
 
   .PHONY: modules module clean clean_conftest modules_install
   modules clean modules_install:
-	@$(MAKE) "CC=$(CC)" $(KBUILD_PARAMS) $@
-	@if [ "$@" = "modules" ]; then \
+	$(MAKE) $(KBUILD_PARAMS) $@
+	@set -x; if [ "$@" = "modules" ]; then \
 	  for module in $(NV_KERNEL_MODULES); do \
 	    if [ -x split-object-file.sh ]; then \
 	      ./split-object-file.sh $$module.ko; \