1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/config/makefiles/autotargets.mk Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,94 @@
1.4 +# -*- makefile -*-
1.5 +# vim:set ts=8 sw=8 sts=8 noet:
1.6 +#
1.7 +# This Source Code Form is subject to the terms of the Mozilla Public
1.8 +# License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.9 +# You can obtain one at http://mozilla.org/MPL/2.0/.
1.10 +#
1.11 +
1.12 +ifndef INCLUDED_AUTOTARGETS_MK #{
1.13 +
1.14 +# Conditional does not wrap the entire file so multiple
1.15 +# includes will be able to accumulate dependencies.
1.16 +
1.17 +###########################################################################
1.18 +# AUTO_DEPS - A list of deps/targets drived from other macros.
1.19 +###########################################################################
1.20 +
1.21 +MKDIR ?= mkdir -p
1.22 +TOUCH ?= touch
1.23 +
1.24 +# declare for local use, rules.mk may not have been loaded
1.25 +space = $(NULL) $(NULL)
1.26 +
1.27 +# Deps will be considered intermediate when used as a pre-requisite for
1.28 +# wildcard targets. Inhibit their removal, mkdir -p is a standalone op.
1.29 +.PRECIOUS: %/.mkdir.done
1.30 +
1.31 +#########################
1.32 +##---] FUNCTIONS [---##
1.33 +#########################
1.34 +
1.35 +# Squeeze can be overzealous, restore root for abspath
1.36 +getPathPrefix =$(if $(filter /%,$(1)),/)
1.37 +
1.38 +# Squeeze '//' from the path, easily created by string functions
1.39 +_slashSqueeze =$(foreach val,$(getargv),$(call getPathPrefix,$(val))$(subst $(space),/,$(strip $(subst /,$(space),$(val)))))
1.40 +
1.41 +# Squeeze extraneous directory slashes from the path
1.42 +# o protect embedded spaces within the path
1.43 +# o replace //+ sequences with /
1.44 +slash_strip = \
1.45 + $(strip \
1.46 + $(subst <--[**]-->,$(space),\
1.47 + $(call _slashSqueeze,\
1.48 + $(subst $(space),<--[**]-->,$(1))\
1.49 + )))
1.50 +
1.51 +# Extract directory path from a dependency file.
1.52 +mkdir_stem =$(foreach val,$(getargv),$(subst /.mkdir.done,$(NULL),$(val)))
1.53 +
1.54 +## Generate timestamp file for threadsafe directory creation
1.55 +mkdir_deps =$(foreach dir,$(getargv),$(call slash_strip,$(dir)/.mkdir.done))
1.56 +
1.57 +#######################
1.58 +##---] TARGETS [---##
1.59 +#######################
1.60 +
1.61 +%/.mkdir.done: # mkdir -p -p => mkdir -p
1.62 + $(subst $(space)-p,$(null),$(MKDIR)) -p '$(dir $@)'
1.63 +# Make the timestamp old enough for not being a problem with symbolic links
1.64 +# targets depending on it. Use Jan 3, 1980 to accomodate any timezone where
1.65 +# 198001010000 would translate to something older than FAT epoch.
1.66 + @$(TOUCH) -t 198001030000 '$@'
1.67 +
1.68 +# A handful of makefiles are attempting "mkdir dot".
1.69 +# tbpl/valgrind builds are using this target
1.70 +# https://bugzilla.mozilla.org/show_bug.cgi?id=837754
1.71 +.mkdir.done:
1.72 + @echo 'WARNING: $(MKDIR) -dot- requested by $(MAKE) -C $(CURDIR) $(MAKECMDGOALS)'
1.73 + @$(TOUCH) -t 198001030000 '$@'
1.74 +
1.75 +INCLUDED_AUTOTARGETS_MK = 1
1.76 +endif #}
1.77 +
1.78 +
1.79 +## Accumulate deps and cleanup
1.80 +ifneq (,$(GENERATED_DIRS))
1.81 + GENERATED_DIRS := $(strip $(sort $(GENERATED_DIRS)))
1.82 + tmpauto :=$(call mkdir_deps,GENERATED_DIRS)
1.83 + GENERATED_DIRS_DEPS +=$(tmpauto)
1.84 + GARBAGE_DIRS +=$(GENERATED_DIRS)
1.85 +endif
1.86 +
1.87 +#################################################################
1.88 +# One ring/dep to rule them all:
1.89 +# config/rules.mk::all target is available by default
1.90 +# Add $(AUTO_DEPS) as an explicit target dependency when needed.
1.91 +#################################################################
1.92 +
1.93 +AUTO_DEPS +=$(GENERATED_DIRS_DEPS)
1.94 +AUTO_DEPS := $(strip $(sort $(AUTO_DEPS)))
1.95 +
1.96 +# Complain loudly if deps have not loaded so getargv != $(NULL)
1.97 +$(call requiredfunction,getargv)
