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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-17 17:45:29 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-17 17:45:29 -0800 |
| commit | 09bd7c75e55cbaa6c731b0c3a5512ad89159f26f (patch) | |
| tree | a73bd9f94d7661d6ff82f3374d4efea81925f7c8 /Kbuild | |
| parent | fa7f578076a8814caa5371e9f4949e408140766d (diff) | |
| parent | 7f855fc805cd9c29867aed56cc20f818b36a7b7b (diff) | |
| download | linux-09bd7c75e55cbaa6c731b0c3a5512ad89159f26f.tar.gz linux-09bd7c75e55cbaa6c731b0c3a5512ad89159f26f.tar.bz2 linux-09bd7c75e55cbaa6c731b0c3a5512ad89159f26f.zip | |
Merge tag 'kbuild-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
"One of the most remarkable improvements in this cycle is, Kbuild is
now able to cache the result of shell commands. Some variables are
expensive to compute, for example, $(call cc-option,...) invokes the
compiler. It is not efficient to redo this computation every time,
even when we are not actually building anything. Kbuild creates a
hidden file ".cache.mk" that contains invoked shell commands and their
results. The speed-up should be noticeable.
Summary:
- Fix arch build issues (hexagon, sh)
- Clean up various Makefiles and scripts
- Fix wrong usage of {CFLAGS,LDFLAGS}_MODULE in arch Makefiles
- Cache variables that are expensive to compute
- Improve cc-ldopton and ld-option for Clang
- Optimize output directory creation"
* tag 'kbuild-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits)
kbuild: move coccicheck help from scripts/Makefile.help to top Makefile
sh: decompressor: add shipped files to .gitignore
frv: .gitignore: ignore vmlinux.lds
selinux: remove unnecessary assignment to subdir-
kbuild: specify FORCE in Makefile.headersinst as .PHONY target
kbuild: remove redundant mkdir from ./Kbuild
kbuild: optimize object directory creation for incremental build
kbuild: create object directories simpler and faster
kbuild: filter-out PHONY targets from "targets"
kbuild: remove redundant $(wildcard ...) for cmd_files calculation
kbuild: create directory for make cache only when necessary
sh: select KBUILD_DEFCONFIG depending on ARCH
kbuild: fix linker feature test macros when cross compiling with Clang
kbuild: shrink .cache.mk when it exceeds 1000 lines
kbuild: do not call cc-option before KBUILD_CFLAGS initialization
kbuild: Cache a few more calls to the compiler
kbuild: Add a cache for generated variables
kbuild: add forward declaration of default target to Makefile.asm-generic
kbuild: remove KBUILD_SUBDIR_ASFLAGS and KBUILD_SUBDIR_CCFLAGS
hexagon/kbuild: replace CFLAGS_MODULE with KBUILD_CFLAGS_MODULE
...
Diffstat (limited to 'Kbuild')
| -rw-r--r-- | Kbuild | 2 |
1 files changed, 0 insertions, 2 deletions
@@ -18,7 +18,6 @@ targets := kernel/bounds.s # We use internal kbuild rules to avoid the "is up to date" message from make kernel/bounds.s: kernel/bounds.c FORCE - $(Q)mkdir -p $(dir $@) $(call if_changed_dep,cc_s_c) $(obj)/$(bounds-file): kernel/bounds.s FORCE @@ -54,7 +53,6 @@ targets += arch/$(SRCARCH)/kernel/asm-offsets.s # We use internal kbuild rules to avoid the "is up to date" message from make arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ $(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE - $(Q)mkdir -p $(dir $@) $(call if_changed_dep,cc_s_c) $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE |