config/makefiles/autotargets.mk
author Chris H-C <chutten@mozilla.com>
Mon, 04 Jul 2016 11:16:05 -0400
changeset 312997 df28918fe2361f0b54ca9ce4773a29c4c0675d06
parent 158429 942d149a7c0c6c4f85f8c212a2414f58b90585f7
permissions -rw-r--r--
bug 1218576 - Support remote accumulation via JS histograms. r=gfritzsche The JS histograms, too, need to dispatch their accumulations from child to parent. JSHistograms_Add now only supports histograms that are in gHistogramsMap or that were created in the parent process. After bug 1288745, maybe we'll be able to change this to be less convoluted. MozReview-Commit-ID: 3qTH89YKbGP

# -*- makefile -*-
# vim:set ts=8 sw=8 sts=8 noet:
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at http://mozilla.org/MPL/2.0/.
#

ifndef INCLUDED_AUTOTARGETS_MK #{

# Conditional does not wrap the entire file so multiple
# includes will be able to accumulate dependencies.

###########################################################################
#      AUTO_DEPS - A list of deps/targets drived from other macros.
###########################################################################

MKDIR ?= mkdir -p
TOUCH ?= touch

# declare for local use, rules.mk may not have been loaded
space = $(NULL) $(NULL)

# Deps will be considered intermediate when used as a pre-requisite for
# wildcard targets.  Inhibit their removal, mkdir -p is a standalone op.
.PRECIOUS: %/.mkdir.done

#########################
##---]  FUNCTIONS  [---##
#########################

# Squeeze can be overzealous, restore root for abspath
getPathPrefix =$(if $(filter /%,$(1)),/)

# Squeeze '//' from the path, easily created by string functions
_slashSqueeze =$(foreach val,$(getargv),$(call getPathPrefix,$(val))$(subst $(space),/,$(strip $(subst /,$(space),$(val)))))

# Squeeze extraneous directory slashes from the path
#  o protect embedded spaces within the path
#  o replace //+ sequences with /
slash_strip = \
  $(strip \
    $(subst <--[**]-->,$(space),\
	$(call _slashSqueeze,\
    $(subst $(space),<--[**]-->,$(1))\
  )))

# Extract directory path from a dependency file.
mkdir_stem =$(foreach val,$(getargv),$(subst /.mkdir.done,$(NULL),$(val)))

## Generate timestamp file for threadsafe directory creation
mkdir_deps =$(foreach dir,$(getargv),$(call slash_strip,$(dir)/.mkdir.done))

#######################
##---]  TARGETS  [---##
#######################

%/.mkdir.done: # mkdir -p -p => mkdir -p
	$(subst $(space)-p,$(null),$(MKDIR)) -p '$(dir $@)'
# Make the timestamp old enough for not being a problem with symbolic links
# targets depending on it. Use Jan 3, 1980 to accomodate any timezone where
# 198001010000 would translate to something older than FAT epoch.
	@$(TOUCH) -t 198001030000 '$@'

# A handful of makefiles are attempting "mkdir dot".
# tbpl/valgrind builds are using this target
# https://bugzilla.mozilla.org/show_bug.cgi?id=837754
.mkdir.done:
	@echo 'WARNING: $(MKDIR) -dot- requested by $(MAKE) -C $(CURDIR) $(MAKECMDGOALS)'
	@$(TOUCH) -t 198001030000 '$@'

INCLUDED_AUTOTARGETS_MK = 1
endif #}


## Accumulate deps and cleanup
ifneq (,$(GENERATED_DIRS))
  GENERATED_DIRS := $(strip $(sort $(GENERATED_DIRS)))
  tmpauto :=$(call mkdir_deps,GENERATED_DIRS)
  GENERATED_DIRS_DEPS +=$(tmpauto)
  GARBAGE_DIRS        +=$(GENERATED_DIRS)
endif

#################################################################
# One ring/dep to rule them all:
#   config/rules.mk::all target is available by default
#   Add $(AUTO_DEPS) as an explicit target dependency when needed.
#################################################################

AUTO_DEPS +=$(GENERATED_DIRS_DEPS)
AUTO_DEPS := $(strip $(sort $(AUTO_DEPS)))

# Complain loudly if deps have not loaded so getargv != $(NULL)
$(call requiredfunction,getargv)