diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-02-22 16:40:09 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-02-27 21:43:31 +0900 |
| commit | 6b12de69ad82ceed317bdbae9ede1a256f84bf4e (patch) | |
| tree | e4c4d7bd1268398b17966407d3675ebfd46dc13a /Makefile | |
| parent | b999923c29d69d795229e5bf1b49e1266491ff35 (diff) | |
| download | lwn-6b12de69ad82ceed317bdbae9ede1a256f84bf4e.tar.gz lwn-6b12de69ad82ceed317bdbae9ede1a256f84bf4e.zip | |
kbuild: simplify single target rules
The dependency will be checked anyway after Kbuild descends into a
sub-directory. Skip object/source dependency checks in top Makefile.
VPATH can be simpler since the top Makefile no longer checks the
presence of the source file, which is located in in the external
module directory.
One good thing is, it can compile an object from a generated source
file.
$ make crypto/rsapubkey.asn1.o
...
ASN.1 crypto/rsapubkey.asn1.c
CC crypto/rsapubkey.asn1.o
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 47 |
1 files changed, 18 insertions, 29 deletions
@@ -219,7 +219,7 @@ objtree := . src := $(srctree) obj := $(objtree) -VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) +VPATH := $(srctree) export srctree objtree VPATH @@ -1699,31 +1699,23 @@ tools/%: FORCE # target-dir => where to store outputfile # build-dir => directory in kernel source tree to use -ifeq ($(KBUILD_EXTMOD),) - build-dir = $(patsubst %/,%,$(dir $@)) - target-dir = $(dir $@) -else - zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) - build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) - target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) -endif - -%.s: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.i: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.o: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.lst: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.s: %.S prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.o: %.S prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.symtypes: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.ll: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ +build-dir = $(patsubst %/,%,$(dir $(build-target))) + +%.i: prepare FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) +%.ll: prepare FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) +%.lst: prepare FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) +%.o: prepare FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) +%.s: prepare FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) +%.symtypes: prepare FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) +%.ko: %.o + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost # Modules PHONY += / @@ -1733,9 +1725,6 @@ PHONY += / Documentation/ samples/: headers_install %/: prepare FORCE $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) -%.ko: prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(@:.ko=.o) - $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost # FIXME Should go into a make.lib or something # =========================================================================== |