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Subject[PATCH] kbuild: do not create built-in objects for external module builds
Date
'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>
---

Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index ec2330ce0fc5..29878033f9d6 100644
--- a/Makefile
+++ b/Makefile
@@ -1692,7 +1692,8 @@ 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)
--
2.25.1
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