From 2dffd23f81a365307c0edcf9cb40b6ddae2b481e Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Wed, 16 Oct 2019 14:15:47 +0900 Subject: [PATCH] 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. Signed-off-by: Masahiro Yamada --- scripts/Makefile.build | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index dcbb0124dac4..7eabbb66a65c 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -479,7 +479,10 @@ curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \ unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \ $(filter-out $(curdir-single), $(KBUILD_SINGLE_TARGETS))) -__build: $(curdir-single) $(subdir-ym) +single-subdirs := $(foreach d, $(subdir-ym), \ + $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) + +__build: $(curdir-single) $(single-subdirs) ifneq ($(unknown-single),) $(Q)$(MAKE) -f /dev/null $(unknown-single) endif