On Mon, Apr 15, 2024 at 7:14 PM Valerii Chernous <vchernou@xxxxxxxxx> wrote: > > The change allow to build external modules with nested makefiles. > Current unofficial way(using "src" variable) allow to build > external(out of tree) kernel module with separating source and build > artifacts dirs but with nested makefiles it doesn't work properly. > Build system trap to recursion inside makefiles, articafts output dir > path grow with each iteration until exceed max path len and build failed > This fix update "src" var during processing subdirs and resolve > recursion issue > Usage example: > make -C KERNEL_SOURCE_TREE M=BUILD_OUT_DIR src=EXT_MOD_SRC_DIR modules > > Cc: Valerii Chernous <vchernou@xxxxxxxxx> > Cc: xe-linux-external@xxxxxxxxx > Signed-off-by: Valerii Chernous <vchernou@xxxxxxxxx> NACK. Please do not send hacks over again. > --- > scripts/Makefile.build | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/scripts/Makefile.build b/scripts/Makefile.build > index a293950e2e07..75ea9052ea4a 100644 > --- a/scripts/Makefile.build > +++ b/scripts/Makefile.build > @@ -490,6 +490,7 @@ $(single-subdir-goals): $(single-subdirs) > PHONY += $(subdir-ym) > $(subdir-ym): > $(Q)$(MAKE) $(build)=$@ \ > + $(if $(findstring command line,$(origin src)),src=$(patsubst $(obj)/%,$(src)/%,$@)) \ > need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \ > need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) \ > $(filter $@/%, $(single-subdir-goals)) > -- > 2.35.6 > -- Best Regards Masahiro Yamada
