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recurse.mk
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# 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_RULES_MK
include $(topsrcdir)/config/rules.mk
endif
# The traditional model of directory traversal with make is as follows:
# make -C foo
# Entering foo
# make -C bar
# Entering foo/bar
# make -C baz
# Entering foo/baz
# make -C qux
# Entering qux
#
# Pseudo derecurse transforms the above into:
# make -C foo
# make -C foo/bar
# make -C foo/baz
# make -C qux
# MOZ_PSEUDO_DERECURSE can have values other than 1.
ifeq (1_.,$(if $(MOZ_PSEUDO_DERECURSE),1)_$(DEPTH))
include root.mk
# Disable build status for mach in top directories without TIERS.
# In practice this disables it when recursing under js/src, which confuses mach.
ifndef TIERS
BUILDSTATUS =
endif
# Main rules (export, compile, binaries, libs and tools) call recurse_* rules.
# This wrapping is only really useful for build status.
compile binaries libs export tools::
$(call BUILDSTATUS,TIER_START $@ $($@_subtiers))
+$(MAKE) recurse_$@
$(call BUILDSTATUS,TIER_FINISH $@)
# Carefully avoid $(eval) type of rule generation, which makes pymake slower
# than necessary.
# Get current tier and corresponding subtiers from the data in root.mk.
CURRENT_TIER := $(filter $(foreach tier,compile binaries libs export tools,recurse_$(tier) $(tier)-deps),$(MAKECMDGOALS))
ifneq (,$(filter-out 0 1,$(words $(CURRENT_TIER))))
$(error $(CURRENT_TIER) not supported on the same make command line)
endif
CURRENT_TIER := $(subst recurse_,,$(CURRENT_TIER:-deps=))
CURRENT_SUBTIERS := $($(CURRENT_TIER)_subtiers)
# The rules here are doing directory traversal, so we don't want further
# recursion to happen when running make -C subdir $tier. But some make files
# further call make -C something else, and sometimes expect recursion to
# happen in that case (see browser/metro/locales/Makefile.in for example).
# Conveniently, every invocation of make increases MAKELEVEL, so only stop
# recursion from happening at current MAKELEVEL + 1.
ifdef CURRENT_TIER
ifeq (0,$(MAKELEVEL))
export NO_RECURSE_MAKELEVEL=1
else
export NO_RECURSE_MAKELEVEL=$(word $(MAKELEVEL),2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20)
endif
endif
# Get all directories traversed for all subtiers in the current tier, or use
# directly the $(*_dirs) variables available in root.mk when there is no
# TIERS (like for js/src).
CURRENT_DIRS := $(or $($(CURRENT_TIER)_dirs),$(foreach subtier,$(CURRENT_SUBTIERS),$($(CURRENT_TIER)_subtier_$(subtier))))
ifneq (,$(filter binaries libs,$(CURRENT_TIER)))
WANT_STAMPS = 1
STAMP_TOUCH = $(TOUCH) $(@D)/binaries
endif
# Subtier delimiter rules
$(addprefix subtiers/,$(addsuffix _start/$(CURRENT_TIER),$(CURRENT_SUBTIERS))): subtiers/%_start/$(CURRENT_TIER): $(if $(WANT_STAMPS),$(call mkdir_deps,subtiers/%_start))
$(call BUILDSTATUS,SUBTIER_START $(CURRENT_TIER) $* $(if $(BUG_915535_FIXED),$($(CURRENT_TIER)_subtier_$*)))
@$(STAMP_TOUCH)
$(addprefix subtiers/,$(addsuffix _finish/$(CURRENT_TIER),$(CURRENT_SUBTIERS))): subtiers/%_finish/$(CURRENT_TIER): $(if $(WANT_STAMPS),$(call mkdir_deps,subtiers/%_finish))
$(call BUILDSTATUS,SUBTIER_FINISH $(CURRENT_TIER) $*)
@$(STAMP_TOUCH)
$(addprefix subtiers/,$(addsuffix /$(CURRENT_TIER),$(CURRENT_SUBTIERS))): %/$(CURRENT_TIER): $(if $(WANT_STAMPS),$(call mkdir_deps,%))
@$(STAMP_TOUCH)
GARBAGE_DIRS += subtiers
# Recursion rule for all directories traversed for all subtiers in the
# current tier.
# root.mk defines subtier_of_* variables, that map a normalized subdir path to
# a subtier name (e.g. subtier_of_memory_jemalloc = base)
$(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): %/$(CURRENT_TIER):
ifdef BUG_915535_FIXED
$(call BUILDSTATUS,TIERDIR_START $(CURRENT_TIER) $(subtier_of_$(subst /,_,$*)) $*)
endif
+@$(MAKE) -C $* $(if $(filter $*,$(tier_$(subtier_of_$(subst /,_,$*))_staticdirs)),,$(CURRENT_TIER))
# Ensure existing stamps are up-to-date, but don't create one if submake didn't create one.
$(if $(wildcard $@),@$(STAMP_TOUCH))
ifdef BUG_915535_FIXED
$(call BUILDSTATUS,TIERDIR_FINISH $(CURRENT_TIER) $(subtier_of_$(subst /,_,$*)) $*)
endif
# Dummy rules for possibly inexisting dependencies for the above tier targets
$(addsuffix /Makefile,$(CURRENT_DIRS)) $(addsuffix /backend.mk,$(CURRENT_DIRS)):
# The export tier requires nsinstall, which is built from config. So every
# subdirectory traversal needs to happen after traversing config.
ifeq ($(CURRENT_TIER),export)
$(addsuffix /$(CURRENT_TIER),$(filter-out config,$(CURRENT_DIRS))): config/$(CURRENT_TIER)
endif
ifdef COMPILE_ENVIRONMENT
ifneq (,$(filter libs binaries,$(CURRENT_TIER)))
# When doing a "libs" build, target_libs.mk ensures the interesting dependency data
# is available in the "binaries" stamp. Once recursion is done, aggregate all that
# dependency info so that stamps depend on relevant files and relevant other stamps.
# When doing a "binaries" build, the aggregate dependency file and those stamps are
# used and allow to skip recursing directories where changes are not going to require
# rebuild. A few directories, however, are still traversed all the time, mostly, the
# gyp managed ones and js/src.
# A few things that are not traversed by a "binaries" build, but should, in an ideal
# world, are nspr, nss, icu and ffi.
recurse_$(CURRENT_TIER):
@$(MAKE) binaries-deps
# Creating binaries-deps.mk directly would make us build it twice: once when beginning
# the build because of the include, and once at the end because of the stamps.
binaries-deps: $(addsuffix /binaries,$(CURRENT_DIRS))
@$(call py_action,link_deps,-o $@.mk --group-by-depfile --topsrcdir $(topsrcdir) --topobjdir $(DEPTH) --dist $(DIST) --guard $(addprefix ",$(addsuffix ",$^)))
@$(TOUCH) $@
ifeq (recurse_binaries,$(MAKECMDGOALS))
$(call include_deps,binaries-deps.mk)
endif
endif
DIST_GARBAGE += binaries-deps.mk binaries-deps
endif
else
# Don't recurse if MAKELEVEL is NO_RECURSE_MAKELEVEL as defined above, but
# still recurse for externally managed make files (gyp-generated ones).
ifeq ($(EXTERNALLY_MANAGED_MAKE_FILE)_$(NO_RECURSE_MAKELEVEL),_$(MAKELEVEL))
compile binaries libs export tools::
else
#########################
# Tier traversal handling
#########################
ifdef TIERS
libs export tools::
$(call BUILDSTATUS,TIER_START $@ $(filter-out $(if $(filter export,$@),,precompile),$(TIERS)))
$(foreach tier,$(TIERS), $(if $(filter-out libs_precompile tools_precompile,$@_$(tier)), \
$(call BUILDSTATUS,SUBTIER_START $@ $(tier) $(if $(filter libs,$@),$(tier_$(tier)_staticdirs)) $(tier_$(tier)_dirs)) \
$(if $(filter libs,$@),$(foreach dir, $(tier_$(tier)_staticdirs), $(call TIER_DIR_SUBMAKE,$@,$(tier),$(dir),,1))) \
$(foreach dir, $(tier_$(tier)_dirs), $(call TIER_DIR_SUBMAKE,$@,$(tier),$(dir),$@)) \
$(call BUILDSTATUS,SUBTIER_FINISH $@ $(tier))))
$(call BUILDSTATUS,TIER_FINISH $@)
else
define CREATE_SUBTIER_TRAVERSAL_RULE
PARALLEL_DIRS_$(1) = $$(addsuffix _$(1),$$(PARALLEL_DIRS))
.PHONY: $(1) $$(PARALLEL_DIRS_$(1))
ifdef PARALLEL_DIRS
$$(PARALLEL_DIRS_$(1)): %_$(1): %/Makefile
+@$$(call SUBMAKE,$(1),$$*)
endif
$(1):: $$(SUBMAKEFILES)
ifdef PARALLEL_DIRS
+@$(MAKE) $$(PARALLEL_DIRS_$(1))
endif
$$(LOOP_OVER_DIRS)
endef
$(foreach subtier,export compile binaries libs tools,$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
tools export:: $(SUBMAKEFILES)
$(LOOP_OVER_TOOL_DIRS)
endif # ifdef TIERS
endif # ifeq ($(EXTERNALLY_MANAGED_MAKE_FILE)_$(NO_RECURSE_MAKELEVEL),_$(MAKELEVEL))
endif # ifeq (1_.,$(MOZ_PSEUDO_DERECURSE)_$(DEPTH))
ifdef MOZ_PSEUDO_DERECURSE
ifdef EXTERNALLY_MANAGED_MAKE_FILE
# gyp-managed directories
recurse_targets := $(addsuffix /binaries,$(DIRS) $(PARALLEL_DIRS))
else
ifeq (.,$(DEPTH))
# top-level directories
recurse_targets := $(addsuffix /binaries,$(binaries_dirs))
ifdef recurse_targets
# only js/src has binaries_dirs, and we want to adjust paths for it.
want_abspaths = 1
endif
endif
endif
ifdef COMPILE_ENVIRONMENT
# Aggregate all dependency files relevant to a binaries build except in
# the mozilla top-level directory.
ifneq (_.,$(recurse_targets)_$(DEPTH))
ALL_DEP_FILES := \
$(BINARIES_PP) \
$(addsuffix .pp,$(addprefix $(MDDEPDIR)/,$(sort \
$(TARGETS) \
$(filter-out $(SOBJS) $(ASOBJS) $(EXCLUDED_OBJS),$(OBJ_TARGETS)) \
))) \
$(recurse_targets) \
$(NULL)
endif
binaries libs:: $(TARGETS) $(BINARIES_PP)
ifneq (_.,$(recurse_targets)_$(DEPTH))
@$(if $(or $(recurse_targets),$^),$(call py_action,link_deps,-o binaries --group-all $(if $(want_abspaths),--abspaths )--topsrcdir $(topsrcdir) --topobjdir $(DEPTH) --dist $(DIST) $(ALL_DEP_FILES)))
endif
endif
endif # ifdef MOZ_PSEUDO_DERECURSE