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: $(syms_targets)
  87
  88 # Ensure dump_syms gets built before any syms targets, all of which depend on it.
  89 ifneq (,$(filter toolkit/crashreporter/google-breakpad/src/tools/%/dump_syms/host,$(compile_targets)))
  90 $(syms_targets): $(filter toolkit/crashreporter/google-breakpad/src/tools/%/dump_syms/host,$(compile_targets))
  91 endif
  92
  93 # The compile tier has different rules from other tiers.
  94 ifneq ($(CURRENT_TIER),compile)
  95
  96 # Recursion rule for all directories traversed for all subtiers in the
  97 # current tier.
  98 $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): %/$(CURRENT_TIER):
  99         $(call RECURSE,$(CURRENT_TIER),$*)
 100
 101 .PHONY: $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS))
 102
 103 # Dummy rules for possibly inexisting dependencies for the above tier targets
 104 $(addsuffix /Makefile,$(CURRENT_DIRS)) $(addsuffix /backend.mk,$(CURRENT_DIRS)):
 105
 106 ifeq ($(CURRENT_TIER),export)
 107 # At least build/export requires config/export for buildid, but who knows what
 108 # else, so keep this global dependency to make config/export first for now.
 109 $(addsuffix /$(CURRENT_TIER),$(filter-out config,$(CURRENT_DIRS))): config/$(CURRENT_TIER)
 110
 111 # The export tier requires nsinstall, which is built from config. So every
 112 # subdirectory traversal needs to happen after building nsinstall in config, which
 113 # is done with the config/host target. Note the config/host target only exists if
 114 # nsinstall is actually built, which it is not on Windows, because we use
 115 # nsinstall.py there.
 116 ifdef COMPILE_ENVIRONMENT
 117 ifneq (,$(filter config/host, $(compile_targets)))
 118 $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): config/host
 119 endif
 120 endif
 121 endif
 122
 123 endif # ifeq ($(CURRENT_TIER),compile)
 124
 125 else
 126
 127 # Don't recurse if MAKELEVEL is NO_RECURSE_MAKELEVEL as defined above
 128 ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
 129
 130 $(RUNNABLE_TIERS)::
 131
 132 else
 133 #########################
 134 # Tier traversal handling
 135 #########################
 136
 137 define CREATE_SUBTIER_TRAVERSAL_RULE
 138 .PHONY: $(1)
 139
 140 $(1):: $$(SUBMAKEFILES)
 141         $$(LOOP_OVER_DIRS)
 142
 143 endef
 144
 145 $(foreach subtier,$(filter-out compile,$(RUNNABLE_TIERS)),$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
 146
 147 ifndef TOPLEVEL_BUILD
 148 ifdef COMPILE_ENVIRONMENT
 149 compile::
 150         @$(MAKE) -C $(DEPTH) compile RECURSE_BASE_DIR=$(relativesrcdir)/
 151 endif # COMPILE_ENVIRONMENT
 152 endif
 153
 154 endif # ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
 155
 156 endif # ifeq (.,$(DEPTH))
 157
 158 recurse:
 159         @$(RECURSED_COMMAND)
 160         $(LOOP_OVER_DIRS)
 161
 162 ifeq (.,$(DEPTH))
 163
 164 # This is required so that the pre-export tier sees the rules in
 165 # mobile/android
 166 ifeq ($(MOZ_WIDGET_TOOLKIT),android)
 167 recurse_pre-export:: mobile/android/pre-export
 168 endif
 169
 170 # CSS2Properties.webidl needs ServoCSSPropList.py from layout/style
 171 dom/bindings/export: layout/style/ServoCSSPropList.py
 172
 173 # Various telemetry histogram files need ServoCSSPropList.py from layout/style
 174 toolkit/components/telemetry/export: layout/style/ServoCSSPropList.py
 175
 176 # The update agent needs to link to the updatecommon library, but the build system does not
 177 # currently have a good way of expressing this dependency.
 178 toolkit/components/updateagent/target: toolkit/mozapps/update/common/target
 179
 180 ifeq ($(TARGET_ENDIANNESS),big)
 181 config/external/icu/data/target-objects: config/external/icu/data/$(MDDEPDIR)/icudt$(MOZ_ICU_VERSION)b.dat.stub
 182 config/external/icu/data/$(MDDEPDIR)/icudt$(MOZ_ICU_VERSION)b.dat.stub: config/external/icu/icupkg/host
 183 endif
 184
 185 ifdef ENABLE_CLANG_PLUGIN
 186 # Only target rules use the clang plugin.
 187 $(filter %/target %/target-objects,$(filter-out config/export config/host build/unix/stdc++compat/% build/clang-plugin/%,$(compile_targets))): build/clang-plugin/host build/clang-plugin/tests/target-objects
 188 build/clang-plugin/tests/target-objects: build/clang-plugin/host
 189 # clang-plugin tests require js-confdefs.h on js standalone builds and mozilla-config.h on
 190 # other builds, because they are -include'd.
 191 ifdef JS_STANDALONE
 192 # The js/src/export target only exists when CURRENT_TIER is export. If we're in a later tier,
 193 # we can assume js/src/export has happened anyways.
 194 ifeq ($(CURRENT_TIER),export)
 195 build/clang-plugin/tests/target-objects: js/src/export
 196 endif
 197 else
 198 build/clang-plugin/tests/target-objects: mozilla-config.h
 199 endif
 200 endif
 201
 202 # Interdependencies that moz.build world don't know about yet for compilation.
 203 # Note some others are hardcoded or "guessed" in recursivemake.py and emitter.py
 204 ifndef MOZ_FOLD_LIBS
 205 ifndef MOZ_SYSTEM_NSS
 206 netwerk/test/http3server/target: security/nss/lib/nss/nss_nss3/target security/nss/lib/ssl/ssl_ssl3/target
 207 endif
 208 ifndef MOZ_SYSTEM_NSPR
 209 netwerk/test/http3server/target: config/external/nspr/pr/target
 210 endif
 211 else
 212 ifndef MOZ_SYSTEM_NSS
 213 netwerk/test/http3server/target: security/target
 214 endif
 215 endif
 216
 217 ifdef MOZ_USING_WASM_SANDBOXING
 218 security/rlbox/target-objects: config/external/wasm2c_sandbox_compiler/host
 219 security/rlbox/target: security/rlbox/target-objects
 220 endif
 221
 222 # Most things are built during compile (target/host), but some things happen during export
 223 # Those need to depend on config/export for system wrappers.
 224 $(addprefix build/unix/stdc++compat/,target host) build/clang-plugin/host: config/export
 225
 226 # Rust targets, and export targets that run cbindgen need
 227 # $topobjdir/.cargo/config to be preprocessed first. Ideally, we'd only set it
 228 # as a dependency of the rust targets, but unfortunately, that pushes Make to
 229 # execute them much later than we'd like them to be when the file doesn't exist
 230 # prior to Make running. So we also set it as a dependency of pre-export, which
 231 # ensures it exists before recursing the rust targets and the export targets
 232 # that run cbindgen, tricking Make into keeping them early.
 233 $(rust_targets): $(DEPTH)/.cargo/config
 234 ifndef TEST_MOZBUILD
 235 pre-export:: $(DEPTH)/.cargo/config
 236 endif
 237
 238 # When building gtest as part of the build (LINK_GTEST_DURING_COMPILE),
 239 # force the build system to get to it first, so that it can be linked
 240 # quickly without LTO, allowing the build system to go ahead with
 241 # plain gkrust and libxul while libxul-gtest is being linked and
 242 # dump-sym'ed.
 243 ifneq (,$(filter toolkit/library/gtest/rust/target,$(compile_targets)))
 244 toolkit/library/rust/target: toolkit/library/gtest/rust/target
 245 endif
 246 endif