gecko/config/recurse.mk

166 lines
5.1 KiB
Makefile

# 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
# Make sure that anything that needs to be defined in moz.build wasn't
# overwritten after including rules.mk.
_eval_for_side_effects := $(CHECK_MOZBUILD_VARIABLES)
# The traditional model of directory traversal with make is as follows:
# make -C foo
# Entering foo
# make -C bar
# Entering foo/bar
# make -C baz
# Entering foo/baz
# make -C qux
# Entering qux
#
# Pseudo derecurse transforms the above into:
# make -C foo
# make -C foo/bar
# make -C foo/baz
# make -C qux
ifeq (.,$(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, libs and tools) call recurse_* rules.
# This wrapping is only really useful for build status.
compile libs export tools::
$(call BUILDSTATUS,TIER_START $@)
+$(MAKE) recurse_$@
$(call BUILDSTATUS,TIER_FINISH $@)
# Special rule that does install-manifests (cf. Makefile.in) + compile
binaries::
+$(MAKE) recurse_compile
# 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 $(foreach tier,compile libs export tools,recurse_$(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=))
# 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 := $($(CURRENT_TIER)_dirs)
# The compile tier has different rules from other tiers.
ifeq ($(CURRENT_TIER),compile)
# Need a list of compile targets because we can't use pattern rules:
# https://savannah.gnu.org/bugs/index.php?42833
.PHONY: $(compile_targets)
$(compile_targets):
$(call SUBMAKE,$(@F),$(@D))
else
# Recursion rule for all directories traversed for all subtiers in the
# current tier.
$(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): %/$(CURRENT_TIER):
$(call SUBMAKE,$(CURRENT_TIER),$*)
.PHONY: $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS))
# Dummy rules for possibly inexisting dependencies for the above tier targets
$(addsuffix /Makefile,$(CURRENT_DIRS)) $(addsuffix /backend.mk,$(CURRENT_DIRS)):
ifeq ($(CURRENT_TIER),export)
# At least build/export requires config/export for buildid, but who knows what
# else, so keep this global dependency to make config/export first for now.
$(addsuffix /$(CURRENT_TIER),$(filter-out config,$(CURRENT_DIRS))): config/$(CURRENT_TIER)
# The export tier requires nsinstall, which is built from config. So every
# subdirectory traversal needs to happen after building nsinstall in config, which
# is done with the config/host target. Note the config/host target only exists if
# nsinstall is actually built, which it is not on Windows, because we use
# nsinstall.py there.
ifneq (,$(filter config/host, $(compile_targets)))
$(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): config/host
# Ensure rules for config/host and its possible dependencies.
.PHONY: $(filter %/host, $(compile_targets))
$(filter %/host, $(compile_targets)):
$(call SUBMAKE,host,$(@D))
endif
endif
endif # ifeq ($(CURRENT_TIER),compile)
else
# Don't recurse if MAKELEVEL is NO_RECURSE_MAKELEVEL as defined above
ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
compile libs export tools::
else
#########################
# Tier traversal handling
#########################
ifdef TIERS
libs export tools::
$(call BUILDSTATUS,TIER_START $@)
$(foreach tier,$(TIERS), $(if $(filter-out libs_precompile tools_precompile,$@_$(tier)), \
$(foreach dir, $(tier_$(tier)_dirs), $(call TIER_DIR_SUBMAKE,$@,$(tier),$(dir),$@))))
$(call BUILDSTATUS,TIER_FINISH $@)
else
define CREATE_SUBTIER_TRAVERSAL_RULE
.PHONY: $(1)
$(1):: $$(SUBMAKEFILES)
$$(LOOP_OVER_DIRS)
endef
$(foreach subtier,export libs tools,$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
ifndef TOPLEVEL_BUILD
libs:: target host
endif
endif # ifdef TIERS
endif # ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
endif # ifeq (.,$(DEPTH))
recurse:
@$(RECURSED_COMMAND)
$(LOOP_OVER_DIRS)