From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 8 Sep 2020 20:55:57 +0000 (+0900)
Subject: kbuild: do not create built-in objects for external module builds
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6212804f2d78e86f15dba5b46a4065cbf1403cde;p=linux.git

kbuild: do not create built-in objects for external module builds

'make M=/path/to/your/external/module' creates a pointless built-in.a
in the top of the external module directory because KBUILD_BUILTIN is
set to 1.

Clear KBUILD_BUILTIN when we are building external modules so that
'make M=...' and 'make M=... modules' work equivalently.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

diff --git a/Makefile b/Makefile
index 97b1dae1783b4..744b6c6644049 100644
--- a/Makefile
+++ b/Makefile
@@ -1702,7 +1702,8 @@ else # KBUILD_EXTMOD
 #                      Install the modules built in the module directory
 #                      Assumes install directory is already created
 
-# We are always building modules
+# We are always building only modules.
+KBUILD_BUILTIN :=
 KBUILD_MODULES := 1
 
 build-dirs := $(KBUILD_EXTMOD)