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 $(topsrcdir)/config/rules.mk
   7 endif
   8
   9 # The traditional model of directory traversal with make is as follows:
  10 #   make -C foo
  11 #     Entering foo
  12 #     make -C bar
  13 #       Entering foo/bar
  14 #     make -C baz
  15 #       Entering foo/baz
  16 #   make -C qux
  17 #     Entering qux
  18 #
  19 # Pseudo derecurse transforms the above into:
  20 #   make -C foo
  21 #   make -C foo/bar
  22 #   make -C foo/baz
  23 #   make -C qux
  24
  25 ifeq (.,$(DEPTH))
  26
  27 include root.mk
  28
  29 # Main rules (export, compile, libs and tools) call recurse_* rules.
  30 # This wrapping is only really useful for build status.
  31 $(RUNNABLE_TIERS)::
  32         $(if $(filter $@,$(MAKECMDGOALS)),$(call BUILDSTATUS,TIERS $@),)
  33         $(call BUILDSTATUS,TIER_START $@)
  34         +$(MAKE) recurse_$@
  35         $(call BUILDSTATUS,TIER_FINISH $@)
  36
  37 # Special rule that does install-manifests (cf. Makefile.in) + compile
  38 binaries::
  39         +$(MAKE) recurse_compile
  40
  41 # Get current tier and corresponding subtiers from the data in root.mk.
  42 CURRENT_TIER := $(filter $(foreach tier,$(RUNNABLE_TIERS) $(non_default_tiers),recurse_$(tier) $(tier)-deps),$(MAKECMDGOALS))
  43 ifneq (,$(filter-out 0 1,$(words $(CURRENT_TIER))))
  44 $(error $(CURRENT_TIER) not supported on the same make command line)
  45 endif
  46 CURRENT_TIER := $(subst recurse_,,$(CURRENT_TIER:-deps=))
  47
  48 # The rules here are doing directory traversal, so we don't want further
  49 # recursion to happen when running make -C subdir $tier. But some make files
  50 # further call make -C something else, and sometimes expect recursion to
  51 # happen in that case.
  52 # Conveniently, every invocation of make increases MAKELEVEL, so only stop
  53 # recursion from happening at current MAKELEVEL + 1.
  54 ifdef CURRENT_TIER
  55 ifeq (0,$(MAKELEVEL))
  56 export NO_RECURSE_MAKELEVEL=1
  57 else
  58 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)
  59 endif
  60 endif
  61
  62 RECURSE = $(if $(RECURSE_TRACE_ONLY),@echo $2/$1,$(call SUBMAKE,$1,$2))
  63
  64 # Use the $(*_dirs) variables available in root.mk
  65 CURRENT_DIRS := $($(CURRENT_TIER)_dirs)
  66
  67 # Need a list of compile targets because we can't use pattern rules:
  68 # https://savannah.gnu.org/bugs/index.php?42833
  69 # Only recurse the paths starting with RECURSE_BASE_DIR when provided.
  70 .PHONY: $(pre_compile_targets) $(compile_targets) $(syms_targets)
  71 $(pre_compile_targets) $(compile_targets) $(syms_targets):
  72         $(if $(filter $(RECURSE_BASE_DIR)%,$@),$(call RECURSE,$(@F),$(@D)))
  73
  74 $(syms_targets): %/syms: %/target
  75
  76 # Only hook symbols targets into the main compile graph in automation.
  77 ifdef MOZ_AUTOMATION
  78 ifeq (1,$(MOZ_AUTOMATION_BUILD_SYMBOLS))
  79 recurse_compile: $(syms_targets)
  80 endif
  81 endif
  82
  83 # Create a separate rule that depends on every 'syms' target so that
  84 # symbols can be dumped on demand locally.
  85 .PHONY: recurse_syms
  86 recurse_syms: $(syms_targets)
  87
  88 # The compile tier has different rules from other tiers.
  89 ifneq ($(CURRENT_TIER),compile)
  90
  91 # Recursion rule for all directories traversed for all subtiers in the
  92 # current tier.
  93 $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): %/$(CURRENT_TIER):
  94         $(call RECURSE,$(CURRENT_TIER),$*)
  95
  96 .PHONY: $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS))
  97
  98 # Dummy rules for possibly inexisting dependencies for the above tier targets
  99 $(addsuffix /Makefile,$(CURRENT_DIRS)) $(addsuffix /backend.mk,$(CURRENT_DIRS)):
 100
 101 ifeq ($(CURRENT_TIER),export)
 102 # At least build/export requires config/export for buildid, but who knows what
 103 # else, so keep this global dependency to make config/export first for now.
 104 $(addsuffix /$(CURRENT_TIER),$(filter-out config,$(CURRENT_DIRS))): config/$(CURRENT_TIER)
 105
 106 # The export tier requires nsinstall, which is built from config. So every
 107 # subdirectory traversal needs to happen after building nsinstall in config, which
 108 # is done with the config/host target. Note the config/host target only exists if
 109 # nsinstall is actually built, which it is not on Windows, because we use
 110 # nsinstall.py there.
 111 ifdef COMPILE_ENVIRONMENT
 112 ifneq (,$(filter config/host, $(compile_targets)))
 113 $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): config/host
 114 endif
 115 endif
 116 endif
 117
 118 endif # ifeq ($(CURRENT_TIER),compile)
 119
 120 else
 121
 122 # Don't recurse if MAKELEVEL is NO_RECURSE_MAKELEVEL as defined above
 123 ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
 124
 125 $(RUNNABLE_TIERS)::
 126
 127 else
 128 #########################
 129 # Tier traversal handling
 130 #########################
 131
 132 define CREATE_SUBTIER_TRAVERSAL_RULE
 133 .PHONY: $(1)
 134
 135 $(1):: $$(SUBMAKEFILES)
 136         $$(LOOP_OVER_DIRS)
 137
 138 endef
 139
 140 $(foreach subtier,$(filter-out compile,$(RUNNABLE_TIERS)),$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
 141
 142 ifndef TOPLEVEL_BUILD
 143 ifdef COMPILE_ENVIRONMENT
 144 compile::
 145         @$(MAKE) -C $(DEPTH) compile RECURSE_BASE_DIR=$(relativesrcdir)/
 146 endif # COMPILE_ENVIRONMENT
 147 endif
 148
 149 endif # ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
 150
 151 endif # ifeq (.,$(DEPTH))
 152
 153 recurse:
 154         @$(RECURSED_COMMAND)
 155         $(LOOP_OVER_DIRS)
 156
 157 ifeq (.,$(DEPTH))
 158
 159 # This is required so that the pre-export tier sees the rules in
 160 # mobile/android
 161 ifeq ($(MOZ_WIDGET_TOOLKIT),android)
 162 recurse_pre-export: mobile/android/pre-export
 163 endif
 164
 165 # CSS2Properties.webidl needs ServoCSSPropList.py from layout/style
 166 dom/bindings/export: layout/style/ServoCSSPropList.py
 167
 168 # Various telemetry histogram files need ServoCSSPropList.py from layout/style
 169 toolkit/components/telemetry/export: layout/style/ServoCSSPropList.py
 170
 171 ifeq ($(TARGET_ENDIANNESS),big)
 172 config/external/icu/data/target-objects: config/external/icu/data/$(MDDEPDIR)/icudt$(MOZ_ICU_VERSION)b.dat.stub
 173 config/external/icu/data/$(MDDEPDIR)/icudt$(MOZ_ICU_VERSION)b.dat.stub: config/external/icu/icupkg/host
 174 endif
 175
 176 ifdef ENABLE_CLANG_PLUGIN
 177 # Only target rules use the clang plugin.
 178 $(filter %/target %/target-objects,$(filter-out config/export config/host build/unix/stdc++compat/% build/clang-plugin/%,$(compile_targets))) security/rlbox/pre-compile media/libsoundtouch/src/pre-compile: build/clang-plugin/host build/clang-plugin/tests/target-objects
 179 build/clang-plugin/tests/target-objects: build/clang-plugin/host
 180 # clang-plugin tests require js-confdefs.h on js standalone builds and mozilla-config.h on
 181 # other builds, because they are -include'd.
 182 ifdef JS_STANDALONE
 183 # The js/src/export target only exists when CURRENT_TIER is export. If we're in a later tier,
 184 # we can assume js/src/export has happened anyways.
 185 ifeq ($(CURRENT_TIER),export)
 186 build/clang-plugin/tests/target-objects: js/src/export
 187 endif
 188 else
 189 build/clang-plugin/tests/target-objects: mozilla-config.h
 190 endif
 191 endif
 192
 193 # Interdependencies that moz.build world don't know about yet for compilation.
 194 # Note some others are hardcoded or "guessed" in recursivemake.py and emitter.py
 195 ifdef MOZ_USING_WASM_SANDBOXING
 196 dom/media/ogg/target-objects extensions/spellcheck/hunspell/glue/target-objects gfx/thebes/target-objects parser/expat/target-objects parser/htmlparser/target-objects gfx/ots/src/target-objects: security/rlbox/pre-compile
 197 dom/media/target-objects dom/media/mediasink/target-objects: media/libsoundtouch/src/pre-compile
 198 endif
 199
 200 # Most things are built during compile (target/host), but some things happen during export
 201 # Those need to depend on config/export for system wrappers.
 202 $(addprefix build/unix/stdc++compat/,target host) build/clang-plugin/host: config/export
 203
 204 # Rust targets, and export targets that run cbindgen need
 205 # $topobjdir/.cargo/config to be preprocessed first. Ideally, we'd only set it
 206 # as a dependency of the rust targets, but unfortunately, that pushes Make to
 207 # execute them much later than we'd like them to be when the file doesn't exist
 208 # prior to Make running. So we also set it as a dependency of pre-export, which
 209 # ensures it exists before recursing the rust targets and the export targets
 210 # that run cbindgen, tricking Make into keeping them early.
 211 $(rust_targets): $(DEPTH)/.cargo/config
 212 ifndef TEST_MOZBUILD
 213 recurse_pre-export: $(DEPTH)/.cargo/config
 214 endif
 215
 216 endif