kbuild: gitignore output directory

Backported from kernel
commit 3a51ff344204 ("kbuild: gitignore output directory"

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

diff --git a/Makefile b/Makefile
index 00c0d76..2b9516b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -513,10 +513,13 @@ PHONY += outputmakefile
 # outputmakefile generates a Makefile in the output directory, if using a
 # separate output directory. This allows convenient use of make in the
 # output directory.
+# At the same time when output Makefile generated, generate .gitignore to
+# ignore whole output directory
 outputmakefile:
 ifneq ($(KBUILD_SRC),)
        $(Q)ln -fsn $(srctree) source
        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
+       $(Q){ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
 endif
 
 # To make sure we do not include .config for any of the *config targets