mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-19 02:34:01 +08:00
919987318a
Some time ago, Sam pointed out a certain degree of overwrap between generic-y and mandatory-y. (https://lkml.org/lkml/2017/7/10/121) I tweaked the meaning of mandatory-y a little bit; now it defines the minimum set of ASM headers that all architectures must have. If arch does not have specific implementation of a mandatory header, Kbuild will let it fallback to the asm-generic one by automatically generating a wrapper. This will allow to drop lots of redundant generic-y defines. Previously, "mandatory" was used in the context of UAPI, but I guess this can be extended to kernel space ASM headers. Suggested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Sam Ravnborg <sam@ravnborg.org>
123 lines
3.8 KiB
Makefile
123 lines
3.8 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
# ==========================================================================
|
|
# Installing headers
|
|
#
|
|
# All headers under include/uapi, include/generated/uapi,
|
|
# arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are
|
|
# exported.
|
|
# They are preprocessed to remove __KERNEL__ section of the file.
|
|
#
|
|
# ==========================================================================
|
|
|
|
PHONY := __headers
|
|
__headers:
|
|
|
|
include scripts/Kbuild.include
|
|
|
|
srcdir := $(srctree)/$(obj)
|
|
|
|
# When make is run under a fakechroot environment, the function
|
|
# $(wildcard $(srcdir)/*/.) doesn't only return directories, but also regular
|
|
# files. So, we are using a combination of sort/dir/wildcard which works
|
|
# with fakechroot.
|
|
subdirs := $(patsubst $(srcdir)/%/,%,\
|
|
$(filter-out $(srcdir)/,\
|
|
$(sort $(dir $(wildcard $(srcdir)/*/)))))
|
|
|
|
# Recursion
|
|
__headers: $(subdirs)
|
|
|
|
PHONY += $(subdirs)
|
|
$(subdirs):
|
|
$(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(dst)/$@
|
|
|
|
# Skip header install/check for include/uapi and arch/$(SRCARCH)/include/uapi.
|
|
# We have only sub-directories there.
|
|
skip-inst := $(if $(filter %/uapi,$(obj)),1)
|
|
|
|
ifeq ($(skip-inst),)
|
|
|
|
# Kbuild file is optional
|
|
kbuild-file := $(srctree)/$(obj)/Kbuild
|
|
-include $(kbuild-file)
|
|
|
|
installdir := $(INSTALL_HDR_PATH)/$(dst)
|
|
gendir := $(objtree)/$(subst include/,include/generated/,$(obj))
|
|
header-files := $(notdir $(wildcard $(srcdir)/*.h))
|
|
header-files := $(filter-out $(no-export-headers), $(header-files))
|
|
genhdr-files := $(notdir $(wildcard $(gendir)/*.h))
|
|
genhdr-files := $(filter-out $(header-files), $(genhdr-files))
|
|
|
|
# files used to track state of install/check
|
|
install-file := $(installdir)/.install
|
|
check-file := $(installdir)/.check
|
|
|
|
# all headers files for this dir
|
|
all-files := $(header-files) $(genhdr-files)
|
|
output-files := $(addprefix $(installdir)/, $(all-files))
|
|
|
|
# Work out what needs to be removed
|
|
oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
|
|
unwanted := $(filter-out $(all-files),$(oldheaders))
|
|
|
|
# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
|
|
unwanted-file := $(addprefix $(installdir)/, $(unwanted))
|
|
|
|
printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
|
|
|
|
quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
|
|
file$(if $(word 2, $(all-files)),s))
|
|
cmd_install = \
|
|
$(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \
|
|
$(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \
|
|
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 $(all-files); do \
|
|
echo "$(installdir)/$${f}"; done \
|
|
| xargs \
|
|
$(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
|
|
touch $@
|
|
|
|
ifndef HDRCHECK
|
|
# Rules for installing headers
|
|
__headers: $(install-file)
|
|
@:
|
|
|
|
targets += $(install-file)
|
|
$(install-file): scripts/headers_install.sh \
|
|
$(addprefix $(srcdir)/,$(header-files)) \
|
|
$(addprefix $(gendir)/,$(genhdr-files)) FORCE
|
|
$(if $(unwanted),$(call cmd,remove),)
|
|
$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
|
|
$(call if_changed,install)
|
|
|
|
else
|
|
__headers: $(check-file)
|
|
@:
|
|
|
|
targets += $(check-file)
|
|
$(check-file): scripts/headers_check.pl $(output-files) FORCE
|
|
$(call if_changed,check)
|
|
|
|
endif
|
|
|
|
cmd_files := $(wildcard \
|
|
$(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
|
|
|
|
ifneq ($(cmd_files),)
|
|
include $(cmd_files)
|
|
endif
|
|
|
|
endif # skip-inst
|
|
|
|
PHONY += FORCE
|
|
FORCE: ;
|
|
|
|
.PHONY: $(PHONY)
|