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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138#### build: Generic definitions## Lots of this code have been borrowed or heavily inspired from parts# of kbuild code, which is not credited, but mostly developed by:## Copyright (C) Sam Ravnborg <sam@mars.ravnborg.org>, 2015# Copyright (C) Linus Torvalds <torvalds@linux-foundation.org>, 2015#
#### Convenient variablescomma := ,squote := 'pound := \#empty :=space := $(empty) $(empty)
#### Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.odot-target = $(dir $@).$(notdir $@)
#### filename of target with directory and extension strippedbasetarget = $(basename $(notdir $@))
#### The temporary file to save gcc -MD generated dependencies must not# contain a commadepfile = $(subst $(comma),_,$(dot-target).d)
#### Check if both arguments has same arguments. Result is empty string if equal.arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \ $(filter-out $(cmd_$@), $(cmd_$(1))) )
#### Escape single quote for use in echo statementsescsq = $(subst $(squote),'\$(squote)',$1)
# Echo command# Short version is used, if $(quiet) equals `quiet_', otherwise full one.echo-cmd = $(if $($(quiet)cmd_$(1)),\ echo ' $(call escsq,$($(quiet)cmd_$(1)))';)
#### Replace >$< with >$$< to preserve $ when reloading the .cmd file# (needed for make)# Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file# (needed for make)# Replace >'< with >'\''< to be able to enclose the whole string in '...'# (needed for the shell)make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
#### Find any prerequisites that is newer than target or that does not exist.# PHONY targets skipped in both cases.any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
#### Copy dependency data into .cmd file# - gcc -M dependency info# - command line to create object 'cmd_object :='dep-cmd = $(if $(wildcard $(fixdep)), \ $(fixdep) $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp; \ rm -f $(depfile); \ mv -f $(dot-target).tmp $(dot-target).cmd, \ printf '$(pound) cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \ printf '$(pound) using basic dep data\n\n' >> $(dot-target).cmd; \ cat $(depfile) >> $(dot-target).cmd; \ printf '\n%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
#### if_changed_dep - execute command if any prerequisite is newer than# target, or command line has changed and update# dependencies in the cmd fileif_changed_dep = $(if $(strip $(any-prereq) $(arg-check)), \ @set -e; \ $(echo-cmd) $(cmd_$(1)); \ $(dep-cmd))
# if_changed - execute command if any prerequisite is newer than# target, or command line has changedif_changed = $(if $(strip $(any-prereq) $(arg-check)), \ @set -e; \ $(echo-cmd) $(cmd_$(1)); \ printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
#### C flags to be used in rule definitions, includes:# - depfile generation# - global $(CFLAGS)# - per target C flags# - per object C flags# - BUILD_STR macro to allow '-D"$(variable)"' constructsc_flags_1 = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))c_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1))c_flags = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2))cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj))
#### Rust flags to be used on rule definition, includes:# - global $(RUST_FLAGS)# - per target Rust flags# - per object Rust flagsrust_flags_1 = $(RUST_FLAGS) $(RUST_FLAGS_$(basetarget).o) $(RUST_FLAGS_$(obj))rust_flags_2 = $(filter-out $(RUST_FLAGS_REMOVE_$(basetarget).o), $(rust_flags_1))rust_flags = $(filter-out $(RUST_FLAGS_REMOVE_$(obj)), $(rust_flags_2))
##### HOSTCC C flags
host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(HOSTCFLAGS) -D"BUILD_STR(s)=\#s" $(HOSTCFLAGS_$(basetarget).o) $(HOSTCFLAGS_$(obj))
# output directory for tests belowTMPOUT = .tmp_$$$$
# try-run# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)# Exit code chooses option. "$$TMP" serves as a temporary file and is# automatically cleaned up.try-run = $(shell set -e; \ TMP=$(TMPOUT)/tmp; \ mkdir -p $(TMPOUT); \ trap "rm -rf $(TMPOUT)" EXIT; \ if ($(1)) >/dev/null 2>&1; \ then echo "$(2)"; \ else echo "$(3)"; \ fi)
# cc-option# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)cc-option = $(call try-run, \ $(CC) -Werror $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
# delete partially updated (i.e. corrupted) files on error.DELETE_ON_ERROR: