Hi Valerii, On 4/5/24 9:56 AM, Valerii Chernous wrote: > The change allow to build external modules with nested makefiles. > With current unofficial way(using "src" variable) it is possible to build > external(out of tree) kernel module with separate source and build > artifacts dirs but with nested makefiles it doesn't work properly. > Build system trap to recursion inside makefiles, artifacts output dir > path grow with each iteration until exceed max path len and build failed. > Providing "MO" variable and using "override" directive with declaring > "src" variable solves the problem > Usage example: > make -C KERNEL_SOURCE_TREE MO=BUILD_OUT_DIR M=EXT_MOD_SRC_DIR modules > > Cc: xe-linux-external@xxxxxxxxx > Cc: Valerii Chernous <vchernou@xxxxxxxxx> > Signed-off-by: Valerii Chernous <vchernou@xxxxxxxxx> > --- > Documentation/kbuild/kbuild.rst | 14 +++++++++++++- > Documentation/kbuild/modules.rst | 16 +++++++++++++++- > Makefile | 17 +++++++++++++++++ > scripts/Makefile.build | 7 +++++++ > 4 files changed, 52 insertions(+), 2 deletions(-) > I can read it now. There are still a few small things that I would change, but they aren't a big deal. I'll leave it for Masahiro or others to comment on. Thanks. -- #Randy
