kbuild: make single target builds much faster

Since commit 394053f4a4b3 ("kbuild: make single targets work more correctly"), building single targets is really slow. Speed it up by not descending into unrelated directories.

Masahiro Yamada committed 7 years ago

Commit 2dffd231 parent 20312621 file · +4 −1Browse files

Showing the changes to scripts (1 of 1 file). Show all

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scripts/Makefile.build+4−1

@@ -479,7 +479,10 @@ curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \ · 478 unmodified lines
479	479	unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \
480	480	$(filter-out $(curdir-single), $(KBUILD_SINGLE_TARGETS)))
481	481
482		−__build: $(curdir-single) $(subdir-ym)
	482	+single-subdirs := $(foreach d, $(subdir-ym), \
	483	+ $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
	484	+
	485	+__build: $(curdir-single) $(single-subdirs)
483	486	ifneq ($(unknown-single),)
484	487	$(Q)$(MAKE) -f /dev/null $(unknown-single)
485	488	endif