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| author | Masahiro Yamada <masahiroy@kernel.org> | 2024-11-10 10:34:38 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2024-11-28 08:11:55 +0900 |
| commit | a2a45ebee0969b804b1d474a930001a83c954140 (patch) | |
| tree | b2933b6138a92c5e2745be0a81e8445d5ffe6d3b /Makefile | |
| parent | 822b11a74ba2bc79ddd4165d55e988514c053d71 (diff) | |
kbuild: make wrapper Makefile more convenient for external modules
When Kbuild starts building in a separate output directory, it generates
a wrapper Makefile, allowing you to invoke 'make' from the output
directory.
This commit makes it more convenient, so you can invoke 'make' without
M= or MO=.
First, you need to build external modules in a separate directory:
$ make M=/path/to/module/source/dir MO=/path/to/module/build/dir
Once the wrapper Makefile is generated in /path/to/module/build/dir,
you can proceed as follows:
$ cd /path/to/module/build/dir
$ make
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 12 |
1 files changed, 11 insertions, 1 deletions
@@ -642,10 +642,20 @@ ifdef building_out_of_srctree # At the same time when output Makefile generated, generate .gitignore to # ignore whole output directory +ifdef KBUILD_EXTMOD +print_env_for_makefile = \ + echo "export KBUILD_OUTPUT = $(objtree)"; \ + echo "export KBUILD_EXTMOD = $(realpath $(srcroot))" ; \ + echo "export KBUILD_EXTMOD_OUTPUT = $(CURDIR)" +else +print_env_for_makefile = \ + echo "export KBUILD_OUTPUT = $(CURDIR)" +endif + quiet_cmd_makefile = GEN Makefile cmd_makefile = { \ echo "\# Automatically generated by $(abs_srctree)/Makefile: don't edit"; \ - echo "export KBUILD_OUTPUT = $(CURDIR)"; \ + $(print_env_for_makefile); \ echo "include $(abs_srctree)/Makefile"; \ } > Makefile |