config/recurse.mk

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this file,
   3 # You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 ifndef INCLUDED_RULES_MK
   6 include $(topsrcdir)/config/rules.mk
   7 endif
   8
   9 # The traditional model of directory traversal with make is as follows:
  10 #   make -C foo
  11 #     Entering foo
  12 #     make -C bar
  13 #       Entering foo/bar
  14 #     make -C baz
  15 #       Entering foo/baz
  16 #   make -C qux
  17 #     Entering qux
  18 #
  19 # Pseudo derecurse transforms the above into:
  20 #   make -C foo
  21 #   make -C foo/bar
  22 #   make -C foo/baz
  23 #   make -C qux
  24
  25 # MOZ_PSEUDO_DERECURSE can have values other than 1.
  26 ifeq (1_.,$(if $(MOZ_PSEUDO_DERECURSE),1)_$(DEPTH))
  27
  28 include root.mk
  29
  30 # Disable build status for mach in top directories without TIERS.
  31 # In practice this disables it when recursing under js/src, which confuses mach.
  32 ifndef TIERS
  33 BUILDSTATUS =
  34 endif
  35
  36 # Main rules (export, compile, binaries, libs and tools) call recurse_* rules.
  37 # This wrapping is only really useful for build status.
  38 compile binaries libs export tools::
  39         $(call BUILDSTATUS,TIER_START $@)
  40         +$(MAKE) recurse_$@
  41         $(call BUILDSTATUS,TIER_FINISH $@)
  42
  43 # Carefully avoid $(eval) type of rule generation, which makes pymake slower
  44 # than necessary.
  45 # Get current tier and corresponding subtiers from the data in root.mk.
  46 CURRENT_TIER := $(filter $(foreach tier,compile binaries libs export tools,recurse_$(tier) $(tier)-deps),$(MAKECMDGOALS))
  47 ifneq (,$(filter-out 0 1,$(words $(CURRENT_TIER))))
  48 $(error $(CURRENT_TIER) not supported on the same make command line)
  49 endif
  50 CURRENT_TIER := $(subst recurse_,,$(CURRENT_TIER:-deps=))
  51 CURRENT_SUBTIERS := $($(CURRENT_TIER)_subtiers)
  52
  53 # The rules here are doing directory traversal, so we don't want further
  54 # recursion to happen when running make -C subdir $tier. But some make files
  55 # further call make -C something else, and sometimes expect recursion to
  56 # happen in that case (see browser/metro/locales/Makefile.in for example).
  57 # Conveniently, every invocation of make increases MAKELEVEL, so only stop
  58 # recursion from happening at current MAKELEVEL + 1.
  59 ifdef CURRENT_TIER
  60 ifeq (0,$(MAKELEVEL))
  61 export NO_RECURSE_MAKELEVEL=1
  62 else
  63 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)
  64 endif
  65 endif
  66
  67 # Get all directories traversed for all subtiers in the current tier, or use
  68 # directly the $(*_dirs) variables available in root.mk when there is no
  69 # TIERS (like for js/src).
  70 TIER_DIRS = $(or $($(1)_dirs),$(foreach subtier,$($(1)_subtiers),$($(1)_subtier_$(subtier))))
  71 CURRENT_DIRS := $(call TIER_DIRS,$(CURRENT_TIER))
  72
  73 ifneq (,$(filter binaries libs,$(CURRENT_TIER)))
  74 WANT_STAMPS = 1
  75 STAMP_TOUCH = $(TOUCH) $(@D)/binaries
  76 endif
  77
  78 # Subtier delimiter rules
  79 $(addprefix subtiers/,$(addsuffix _start/$(CURRENT_TIER),$(CURRENT_SUBTIERS))): subtiers/%_start/$(CURRENT_TIER): $(if $(WANT_STAMPS),$(call mkdir_deps,subtiers/%_start))
  80         @$(STAMP_TOUCH)
  81
  82 $(addprefix subtiers/,$(addsuffix _finish/$(CURRENT_TIER),$(CURRENT_SUBTIERS))): subtiers/%_finish/$(CURRENT_TIER): $(if $(WANT_STAMPS),$(call mkdir_deps,subtiers/%_finish))
  83         @$(STAMP_TOUCH)
  84
  85 $(addprefix subtiers/,$(addsuffix /$(CURRENT_TIER),$(CURRENT_SUBTIERS))): %/$(CURRENT_TIER): $(if $(WANT_STAMPS),$(call mkdir_deps,%))
  86         @$(STAMP_TOUCH)
  87
  88 GARBAGE_DIRS += subtiers
  89
  90 # Recursion rule for all directories traversed for all subtiers in the
  91 # current tier.
  92 # root.mk defines subtier_of_* variables, that map a normalized subdir path to
  93 # a subtier name (e.g. subtier_of_memory_jemalloc = base)
  94 $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): %/$(CURRENT_TIER):
  95         +@$(MAKE) -C $* $(if $(filter $*,$(tier_$(subtier_of_$(subst /,_,$*))_staticdirs)),,$(CURRENT_TIER))
  96 # Ensure existing stamps are up-to-date, but don't create one if submake didn't create one.
  97         $(if $(wildcard $@),@$(STAMP_TOUCH))
  98
  99 # Dummy rules for possibly inexisting dependencies for the above tier targets
 100 $(addsuffix /Makefile,$(CURRENT_DIRS)) $(addsuffix /backend.mk,$(CURRENT_DIRS)):
 101
 102 # The export tier requires nsinstall, which is built from config. So every
 103 # subdirectory traversal needs to happen after traversing config.
 104 ifeq ($(CURRENT_TIER),export)
 105 $(addsuffix /$(CURRENT_TIER),$(filter-out config,$(CURRENT_DIRS))): config/$(CURRENT_TIER)
 106 endif
 107
 108 ifdef COMPILE_ENVIRONMENT
 109 ifneq (,$(filter libs binaries,$(CURRENT_TIER)))
 110 # When doing a "libs" build, target_libs.mk ensures the interesting dependency data
 111 # is available in the "binaries" stamp. Once recursion is done, aggregate all that
 112 # dependency info so that stamps depend on relevant files and relevant other stamps.
 113 # When doing a "binaries" build, the aggregate dependency file and those stamps are
 114 # used and allow to skip recursing directories where changes are not going to require
 115 # rebuild. A few directories, however, are still traversed all the time, mostly, the
 116 # gyp managed ones and js/src.
 117 # A few things that are not traversed by a "binaries" build, but should, in an ideal
 118 # world, are nspr, nss, icu and ffi.
 119 recurse_$(CURRENT_TIER):
 120         @$(MAKE) binaries-deps
 121
 122 # Creating binaries-deps.mk directly would make us build it twice: once when beginning
 123 # the build because of the include, and once at the end because of the stamps.
 124 binaries-deps: $(addsuffix /binaries,$(CURRENT_DIRS))
 125         @$(call py_action,link_deps,-o $@.mk --group-by-depfile --topsrcdir $(topsrcdir) --topobjdir $(DEPTH) --dist $(DIST) --guard $(addprefix ',$(addsuffix ',$^)))
 126         @$(TOUCH) $@
 127
 128 ifeq (recurse_binaries,$(MAKECMDGOALS))
 129 $(call include_deps,binaries-deps.mk)
 130 endif
 131
 132 endif
 133
 134 DIST_GARBAGE += binaries-deps.mk binaries-deps
 135
 136 endif
 137
 138 else
 139
 140 # Don't recurse if MAKELEVEL is NO_RECURSE_MAKELEVEL as defined above
 141 ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
 142
 143 compile binaries libs export tools::
 144
 145 else
 146 #########################
 147 # Tier traversal handling
 148 #########################
 149
 150 ifdef TIERS
 151
 152 libs export tools::
 153         $(call BUILDSTATUS,TIER_START $@)
 154         $(foreach tier,$(TIERS), $(if $(filter-out libs_precompile tools_precompile,$@_$(tier)), \
 155                 $(if $(filter libs,$@),$(foreach dir, $(tier_$(tier)_staticdirs), $(call TIER_DIR_SUBMAKE,$@,$(tier),$(dir),,1))) \
 156                 $(foreach dir, $(tier_$(tier)_dirs), $(call TIER_DIR_SUBMAKE,$@,$(tier),$(dir),$@))))
 157         $(call BUILDSTATUS,TIER_FINISH $@)
 158
 159 else
 160
 161 define CREATE_SUBTIER_TRAVERSAL_RULE
 162 PARALLEL_DIRS_$(1) = $$(addsuffix _$(1),$$(PARALLEL_DIRS))
 163
 164 .PHONY: $(1) $$(PARALLEL_DIRS_$(1))
 165
 166 ifdef PARALLEL_DIRS
 167 $$(PARALLEL_DIRS_$(1)): %_$(1): %/Makefile
 168         +@$$(call SUBMAKE,$(1),$$*)
 169 endif
 170
 171 $(1):: $$(SUBMAKEFILES)
 172 ifdef PARALLEL_DIRS
 173         +@$(MAKE) $$(PARALLEL_DIRS_$(1))
 174 endif
 175         $$(LOOP_OVER_DIRS)
 176
 177 endef
 178
 179 $(foreach subtier,export compile binaries libs tools,$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
 180
 181 tools export:: $(SUBMAKEFILES)
 182         $(LOOP_OVER_TOOL_DIRS)
 183
 184 endif # ifdef TIERS
 185
 186 endif # ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
 187
 188 endif # ifeq (1_.,$(MOZ_PSEUDO_DERECURSE)_$(DEPTH))
 189
 190 ifdef MOZ_PSEUDO_DERECURSE
 191
 192 ifdef COMPILE_ENVIRONMENT
 193
 194 # Aggregate all dependency files relevant to a binaries build except in
 195 # the mozilla top-level directory.
 196 ifneq (.,$(DEPTH))
 197 ALL_DEP_FILES := \
 198   $(BINARIES_PP) \
 199   $(addsuffix .pp,$(addprefix $(MDDEPDIR)/,$(sort \
 200     $(TARGETS) \
 201     $(filter-out $(SOBJS) $(ASOBJS) $(EXCLUDED_OBJS),$(OBJ_TARGETS)) \
 202   ))) \
 203   $(NULL)
 204 endif
 205
 206 binaries libs:: $(TARGETS) $(BINARIES_PP)
 207 ifneq (.,$(DEPTH))
 208         @$(if $^,$(call py_action,link_deps,-o binaries --group-all --topsrcdir $(topsrcdir) --topobjdir $(DEPTH) --dist $(DIST) $(ALL_DEP_FILES)))
 209 endif
 210
 211 endif
 212
 213 endif # ifdef MOZ_PSEUDO_DERECURSE
 214
 215 recurse:
 216         @$(RECURSED_COMMAND)
 217         $(LOOP_OVER_PARALLEL_DIRS)
 218         $(LOOP_OVER_DIRS)
 219         $(LOOP_OVER_TOOL_DIRS)