hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

kbuild: optimize object directory creation for incremental build 

The previous commit largely optimized the object directory creation.
We can optimize it more for incremental build.

There are already *.cmd files in the output directory.  The existing
*.cmd files have been picked up by $(wildcard ...).  Obviously,
directories containing them exist too, so we can skip "mkdir -p".

With this, Kbuild runs almost zero "mkdir -p" in incremental building.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2017-11-13 19:29:38 +09:00
parent 8a78756eb5
commit c4da7ed0e7
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
scripts/Makefile.build
View File

@ -583,8 +583,13 @@ endif
ifneq ($(KBUILD_SRC),) ifneq ($(KBUILD_SRC),)
# Create directories for object files if they do not exist # Create directories for object files if they do not exist
obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets)))) obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
# If cmd_files exist, their directories apparently exist. Skip mkdir.
exist-dirs := $(sort $(patsubst %/,%, $(dir $(cmd_files))))
obj-dirs := $(strip $(filter-out $(exist-dirs), $(obj-dirs)))
ifneq ($(obj-dirs),)
$(shell mkdir -p $(obj-dirs)) $(shell mkdir -p $(obj-dirs))
endif endif
endif
# Declare the contents of the .PHONY variable as phony. We keep that # Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable se we can use it in if_changed and friends. # information in a variable se we can use it in if_changed and friends.