mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 00:52:01 +00:00
d8ecc5cd8e
There is an increasing amount of header files
shared between individual architectures in asm-generic.
To avoid a lot of dummy wrapper files that just
include the corresponding file in asm-generic provide
some basic support in kbuild for this.
With the following patch an architecture can maintain
a list of files in the file arch/$(ARCH)/include/asm/Kbuild
To use a generic file just add:
generic-y += <name-of-header-file.h>
For each file listed kbuild will generate the necessary
wrapper in arch/$(ARCH)/include/generated/asm.
When installing userspace headers a wrapper is likewise created.
The original inspiration for this came from the unicore32
patchset - although a different method is used.
The patch includes several improvements from Arnd Bergmann.
Michael Marek contributed Makefile.asm-generic.
Remis Baima did an intial implementation along to achive
the same - see https://patchwork.kernel.org/patch/13352/
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Guan Xuetao <guanxuetao@mprc.pku.edu.cn>
Tested-by: Guan Xuetao <guanxuetao@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
112 lines
3.7 KiB
Makefile
112 lines
3.7 KiB
Makefile
# ==========================================================================
|
|
# Installing headers
|
|
#
|
|
# header-y - list files to be installed. They are preprocessed
|
|
# to remove __KERNEL__ section of the file
|
|
# objhdr-y - Same as header-y but for generated files
|
|
#
|
|
# ==========================================================================
|
|
|
|
# called may set destination dir (when installing to asm/)
|
|
_dst := $(if $(dst),$(dst),$(obj))
|
|
|
|
kbuild-file := $(srctree)/$(obj)/Kbuild
|
|
include $(kbuild-file)
|
|
|
|
_dst := $(if $(destination-y),$(destination-y),$(_dst))
|
|
|
|
include scripts/Kbuild.include
|
|
|
|
install := $(INSTALL_HDR_PATH)/$(_dst)
|
|
|
|
header-y := $(sort $(header-y))
|
|
subdirs := $(patsubst %/,%,$(filter %/, $(header-y)))
|
|
header-y := $(filter-out %/, $(header-y))
|
|
|
|
# files used to track state of install/check
|
|
install-file := $(install)/.install
|
|
check-file := $(install)/.check
|
|
|
|
# generic-y list all files an architecture uses from asm-generic
|
|
# Use this to build a list of headers which require a wrapper
|
|
wrapper-files := $(filter $(header-y), $(generic-y))
|
|
|
|
# all headers files for this dir
|
|
header-y := $(filter-out $(generic-y), $(header-y))
|
|
all-files := $(header-y) $(objhdr-y) $(wrapper-files)
|
|
input-files := $(addprefix $(srctree)/$(obj)/,$(header-y)) \
|
|
$(addprefix $(objtree)/$(obj)/,$(objhdr-y))
|
|
output-files := $(addprefix $(install)/, $(all-files))
|
|
|
|
# Work out what needs to be removed
|
|
oldheaders := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
|
|
unwanted := $(filter-out $(all-files),$(oldheaders))
|
|
|
|
# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
|
|
unwanted-file := $(addprefix $(install)/, $(unwanted))
|
|
|
|
printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
|
|
|
|
quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
|
|
file$(if $(word 2, $(all-files)),s))
|
|
cmd_install = \
|
|
$(PERL) $< $(srctree)/$(obj) $(install) $(SRCARCH) $(header-y); \
|
|
$(PERL) $< $(objtree)/$(obj) $(install) $(SRCARCH) $(objhdr-y); \
|
|
for F in $(wrapper-files); do \
|
|
echo "\#include <asm-generic/$$F>" > $(install)/$$F; \
|
|
done; \
|
|
touch $@
|
|
|
|
quiet_cmd_remove = REMOVE $(unwanted)
|
|
cmd_remove = rm -f $(unwanted-file)
|
|
|
|
quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
|
|
# Headers list can be pretty long, xargs helps to avoid
|
|
# the "Argument list too long" error.
|
|
cmd_check = for f in $(all-files); do \
|
|
echo "$(install)/$${f}"; done \
|
|
| xargs \
|
|
$(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
|
|
touch $@
|
|
|
|
PHONY += __headersinst __headerscheck
|
|
|
|
ifndef HDRCHECK
|
|
# Rules for installing headers
|
|
__headersinst: $(subdirs) $(install-file)
|
|
@:
|
|
|
|
targets += $(install-file)
|
|
$(install-file): scripts/headers_install.pl $(input-files) FORCE
|
|
$(if $(unwanted),$(call cmd,remove),)
|
|
$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
|
|
$(call if_changed,install)
|
|
|
|
else
|
|
__headerscheck: $(subdirs) $(check-file)
|
|
@:
|
|
|
|
targets += $(check-file)
|
|
$(check-file): scripts/headers_check.pl $(output-files) FORCE
|
|
$(call if_changed,check)
|
|
|
|
endif
|
|
|
|
# Recursion
|
|
hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
|
|
.PHONY: $(subdirs)
|
|
$(subdirs):
|
|
$(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
|
|
|
|
targets := $(wildcard $(sort $(targets)))
|
|
cmd_files := $(wildcard \
|
|
$(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
|
|
|
|
ifneq ($(cmd_files),)
|
|
include $(cmd_files)
|
|
endif
|
|
|
|
.PHONY: $(PHONY)
|
|
PHONY += FORCE
|
|
FORCE: ;
|