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94 lines
3.2 KiB
94 lines
3.2 KiB
# -*- 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". |
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# tbpl/valgrind builds are using this target |
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# https://bugzilla.mozilla.org/show_bug.cgi?id=837754 |
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.mkdir.done: |
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@echo 'WARNING: $(MKDIR) -dot- requested by $(MAKE) -C $(CURDIR) $(MAKECMDGOALS)' |
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@$(TOUCH) -t 198001030000 '$@' |
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INCLUDED_AUTOTARGETS_MK = 1 |
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endif #} |
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## Accumulate deps and cleanup |
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ifneq (,$(GENERATED_DIRS)) |
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GENERATED_DIRS := $(strip $(sort $(GENERATED_DIRS))) |
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tmpauto :=$(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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AUTO_DEPS := $(strip $(sort $(AUTO_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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