There has been a long-standing request to support building external
modules in a separate build directory.
The first half is cleanups of documents and Makefiles.
The last part adds KBUILD_EXTMOD_OUTPUT (MO=).
This is too big changes, and too late for the current MW.
(I did not test kselftest at all.)
I hope people test this and may uncover some issues.
Masahiro Yamada (23):
kbuild: doc: update the description about Kbuild/Makefile split
kbuild: doc: remove description about grepping CONFIG options
kbuild: doc: remove outdated description of the limitation on -I usage
kbuild: doc: remove the description about shipped files
kbuild: doc: describe the -C option precisely for external module
builds
kbuild: doc: replace "gcc" in external module description
kbuild: remove unnecessary prune of rust/alloc for rustfmt
kbuild: simplify find command for rustfmt
speakup: use SPKDIR=$(src) to specify the source directory
kbuild: refactor the check for missing config files
kbuild: check the presence of include/generated/rustc_cfg
scripts/nsdeps: use VPATH as src_prefix
kbuild: replace two $(abs_objtree) with $(CURDIR) in top Makefile
kbuild: add $(objtree)/ prefix to some in-kernel build artifacts
kbuild: rename abs_objtree to abs_output
kbuild: use 'output' variable to create the output directory
kbuild: build external modules in their directory
kbuild: remove extmod_prefix, MODORDER, MODULES_NSDEPS variables
kbuild: support building external modules in a separate build
directory
kbuild: support -fmacro-prefix-map for external modules
kbuild: use absolute path in the generated wrapper Makefile
kbuild: make wrapper Makefile more convenient for external modules
kbuild: allow to start building external module in any directory
Documentation/dev-tools/coccinelle.rst | 19 +--
Documentation/kbuild/kbuild.rst | 11 ++
Documentation/kbuild/modules.rst | 104 ++++----------
Makefile | 184 ++++++++++++++++---------
drivers/accessibility/speakup/Makefile | 4 +-
rust/Makefile | 4 +-
scripts/Kbuild.include | 2 +-
scripts/Makefile.build | 4 +-
scripts/Makefile.compiler | 2 +-
scripts/Makefile.modfinal | 16 +--
scripts/Makefile.modinst | 4 +-
scripts/Makefile.modpost | 24 ++--
scripts/coccicheck | 6 +-
scripts/depmod.sh | 4 +-
scripts/nsdeps | 6 +-
scripts/package/install-extmod-build | 7 +
16 files changed, 209 insertions(+), 192 deletions(-)
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2.43.0
