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94 lines
3.1 KiB
Makefile
94 lines
3.1 KiB
Makefile
# -*- makefile -*-
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# vim:set ts=8 sw=8 sts=8 noet:
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this file,
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# You can obtain one at http://mozilla.org/MPL/2.0/.
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#
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ifndef INCLUDED_AUTOTARGETS_MK #{
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# Conditional does not wrap the entire file so multiple
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# includes will be able to accumulate dependencies.
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###########################################################################
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# AUTO_DEPS - A list of deps/targets drived from other macros.
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###########################################################################
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MKDIR ?= mkdir -p
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TOUCH ?= touch
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# declare for local use, rules.mk may not have been loaded
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space = $(NULL) $(NULL)
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# Deps will be considered intermediate when used as a pre-requisite for
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# wildcard targets. Inhibit their removal, mkdir -p is a standalone op.
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.PRECIOUS: %/.mkdir.done
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#########################
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##---] FUNCTIONS [---##
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#########################
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# Squeeze can be overzealous, restore root for abspath
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getPathPrefix =$(if $(filter /%,$(1)),/)
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# Squeeze '//' from the path, easily created by string functions
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_slashSqueeze =$(foreach val,$(getargv),$(call getPathPrefix,$(val))$(subst $(space),/,$(strip $(subst /,$(space),$(val)))))
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# Squeeze extraneous directory slashes from the path
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# o protect embedded spaces within the path
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# o replace //+ sequences with /
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slash_strip =\
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$(strip \
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$(subst <--[**]-->,$(space),\
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$(call _slashSqueeze,\
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$(subst $(space),<--[**]-->,$(1))\
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)))
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# Extract directory path from a dependency file.
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mkdir_stem =$(foreach val,$(getargv),$(subst /.mkdir.done,$(NULL),$(val)))
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## Generate timestamp file for threadsafe directory creation
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mkdir_deps =$(foreach dir,$(getargv),$(call slash_strip,$(dir)/.mkdir.done))
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#######################
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##---] TARGETS [---##
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#######################
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%/.mkdir.done: # mkdir -p -p => mkdir -p
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$(subst $(space)-p,$(null),$(MKDIR)) -p $(dir $@)
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# Make the timestamp old enough for not being a problem with symbolic links
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# targets depending on it. Use Jan 3, 1980 to accomodate any timezone where
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# 198001010000 would translate to something older than FAT epoch.
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@touch -t 198001030000 $@
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# A handful of makefiles are attempting "mkdir dot". Likely not intended
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# or stale logic so add a stub target to handle the request and warn for now.
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.mkdir.done:
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ifndef NOWARN_AUTOTARGETS # {
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@echo "WARNING: $(MKDIR) -dot- requested by $(MAKE) -C $(CURDIR) $(MAKECMDGOALS)"
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@touch -t 198001030000 $@
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endif #}
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INCLUDED_AUTOTARGETS_MK = 1
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endif #}
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## Accumulate deps and cleanup
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ifneq (,$(GENERATED_DIRS))
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tmpauto :=$(call mkdir_deps,GENERATED_DIRS)
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GENERATED_DIRS_DEPS +=$(tmpauto)
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GARBAGE_DIRS +=$(GENERATED_DIRS)
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endif
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#################################################################
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# One ring/dep to rule them all:
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# config/rules.mk::all target is available by default
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# Add $(AUTO_DEPS) as an explicit target dependency when needed.
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#################################################################
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AUTO_DEPS +=$(GENERATED_DIRS_DEPS)
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# Complain loudly if deps have not loaded so getargv != $(NULL)
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$(call requiredfunction,getargv)
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