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 # Carefully avoid $(eval) type of rule generation, which makes pymake slower
  42 # than necessary.
  43 # Get current tier and corresponding subtiers from the data in root.mk.
  44 CURRENT_TIER := $(filter $(foreach tier,$(RUNNABLE_TIERS) $(non_default_tiers),recurse_$(tier) $(tier)-deps),$(MAKECMDGOALS))
  45 ifneq (,$(filter-out 0 1,$(words $(CURRENT_TIER))))
  46 $(error $(CURRENT_TIER) not supported on the same make command line)
  47 endif
  48 CURRENT_TIER := $(subst recurse_,,$(CURRENT_TIER:-deps=))
  49
  50 # The rules here are doing directory traversal, so we don't want further
  51 # recursion to happen when running make -C subdir $tier. But some make files
  52 # further call make -C something else, and sometimes expect recursion to
  53 # happen in that case.
  54 # Conveniently, every invocation of make increases MAKELEVEL, so only stop
  55 # recursion from happening at current MAKELEVEL + 1.
  56 ifdef CURRENT_TIER
  57 ifeq (0,$(MAKELEVEL))
  58 export NO_RECURSE_MAKELEVEL=1
  59 else
  60 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)
  61 endif
  62 endif
  63
  64 RECURSE = $(if $(RECURSE_TRACE_ONLY),@echo $2/$1,$(call SUBMAKE,$1,$2))
  65
  66 # Use the $(*_dirs) variables available in root.mk
  67 CURRENT_DIRS := $($(CURRENT_TIER)_dirs)
  68
  69 # Need a list of compile targets because we can't use pattern rules:
  70 # https://savannah.gnu.org/bugs/index.php?42833
  71 # Only recurse the paths starting with RECURSE_BASE_DIR when provided.
  72 .PHONY: $(compile_targets) $(syms_targets)
  73 $(compile_targets) $(syms_targets):
  74         $(if $(filter $(RECURSE_BASE_DIR)%,$@),$(call RECURSE,$(@F),$(@D)))
  75
  76 $(syms_targets): %/syms: %/target
  77
  78 # Only hook symbols targets into the main compile graph in automation.
  79 ifdef MOZ_AUTOMATION
  80 ifeq (1,$(MOZ_AUTOMATION_BUILD_SYMBOLS))
  81 recurse_compile: $(syms_targets)
  82 endif
  83 endif
  84
  85 # Create a separate rule that depends on every 'syms' target so that
  86 # symbols can be dumped on demand locally.
  87 .PHONY: recurse_syms
  88 recurse_syms: $(syms_targets)
  89
  90 # Ensure dump_syms gets built before any syms targets, all of which depend on it.
  91 ifneq (,$(filter toolkit/crashreporter/google-breakpad/src/tools/%/dump_syms/host,$(compile_targets)))
  92 $(syms_targets): $(filter toolkit/crashreporter/google-breakpad/src/tools/%/dump_syms/host,$(compile_targets))
  93 endif
  94
  95 # The compile tier has different rules from other tiers.
  96 ifneq ($(CURRENT_TIER),compile)
  97
  98 # Recursion rule for all directories traversed for all subtiers in the
  99 # current tier.
 100 $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): %/$(CURRENT_TIER):
 101         $(call RECURSE,$(CURRENT_TIER),$*)
 102
 103 .PHONY: $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS))
 104
 105 # Dummy rules for possibly inexisting dependencies for the above tier targets
 106 $(addsuffix /Makefile,$(CURRENT_DIRS)) $(addsuffix /backend.mk,$(CURRENT_DIRS)):
 107
 108 ifeq ($(CURRENT_TIER),export)
 109 # At least build/export requires config/export for buildid, but who knows what
 110 # else, so keep this global dependency to make config/export first for now.
 111 $(addsuffix /$(CURRENT_TIER),$(filter-out config,$(CURRENT_DIRS))): config/$(CURRENT_TIER)
 112
 113 # The export tier requires nsinstall, which is built from config. So every
 114 # subdirectory traversal needs to happen after building nsinstall in config, which
 115 # is done with the config/host target. Note the config/host target only exists if
 116 # nsinstall is actually built, which it is not on Windows, because we use
 117 # nsinstall.py there.
 118 ifdef COMPILE_ENVIRONMENT
 119 ifneq (,$(filter config/host, $(compile_targets)))
 120 $(addsuffix /$(CURRENT_TIER),$(CURRENT_DIRS)): config/host
 121 endif
 122 endif
 123 endif
 124
 125 endif # ifeq ($(CURRENT_TIER),compile)
 126
 127 else
 128
 129 # Don't recurse if MAKELEVEL is NO_RECURSE_MAKELEVEL as defined above
 130 ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
 131
 132 $(RUNNABLE_TIERS)::
 133
 134 else
 135 #########################
 136 # Tier traversal handling
 137 #########################
 138
 139 define CREATE_SUBTIER_TRAVERSAL_RULE
 140 .PHONY: $(1)
 141
 142 $(1):: $$(SUBMAKEFILES)
 143         $$(LOOP_OVER_DIRS)
 144
 145 endef
 146
 147 $(foreach subtier,$(filter-out compile,$(RUNNABLE_TIERS)),$(eval $(call CREATE_SUBTIER_TRAVERSAL_RULE,$(subtier))))
 148
 149 ifndef TOPLEVEL_BUILD
 150 ifdef COMPILE_ENVIRONMENT
 151 compile::
 152         @$(MAKE) -C $(DEPTH) compile RECURSE_BASE_DIR=$(relativesrcdir)/
 153 endif # COMPILE_ENVIRONMENT
 154 endif
 155
 156 endif # ifeq ($(NO_RECURSE_MAKELEVEL),$(MAKELEVEL))
 157
 158 endif # ifeq (.,$(DEPTH))
 159
 160 recurse:
 161         @$(RECURSED_COMMAND)
 162         $(LOOP_OVER_DIRS)
 163
 164 ifeq (.,$(DEPTH))
 165 # Interdependencies for parallel export.
 166 js/xpconnect/src/export: dom/bindings/export xpcom/xpidl/export
 167 accessible/xpcom/export: xpcom/xpidl/export
 168
 169 # The Android SDK bindings needs to build the Java generator code
 170 # source code in order to write the SDK bindings.
 171 widget/android/bindings/export: mobile/android/base/export
 172
 173 # The widget JNI wrapper generator code needs to build the GeckoView
 174 # source code in order to find JNI wrapper annotations.
 175 widget/android/export: mobile/android/base/export
 176
 177 # .xpt generation needs the xpidl lex/yacc files
 178 xpcom/xpidl/export: xpcom/idl-parser/xpidl/export
 179
 180 # CSS2Properties.webidl needs ServoCSSPropList.py from layout/style
 181 dom/bindings/export: layout/style/export
 182
 183 # Various telemetry histogram files need ServoCSSPropList.py from layout/style
 184 toolkit/components/telemetry/export: layout/style/export
 185
 186 ifdef ENABLE_CLANG_PLUGIN
 187 # Only target rules use the clang plugin.
 188 $(filter %/target %/target-objects,$(filter-out config/export config/host build/unix/stdc++compat/% build/clang-plugin/%,$(compile_targets))): build/clang-plugin/host build/clang-plugin/tests/target-objects
 189 build/clang-plugin/tests/target-objects: build/clang-plugin/host
 190 # clang-plugin tests require js-confdefs.h on js standalone builds and mozilla-config.h on
 191 # other builds, because they are -include'd.
 192 ifdef JS_STANDALONE
 193 # The js/src/export target only exists when CURRENT_TIER is export. If we're in a later tier,
 194 # we can assume js/src/export has happened anyways.
 195 ifeq ($(CURRENT_TIER),export)
 196 build/clang-plugin/tests/target-objects: js/src/export
 197 endif
 198 else
 199 build/clang-plugin/tests/target-objects: mozilla-config.h
 200 endif
 201 endif
 202
 203 # Interdependencies that moz.build world don't know about yet for compilation.
 204 # Note some others are hardcoded or "guessed" in recursivemake.py and emitter.py
 205 ifeq ($(MOZ_WIDGET_TOOLKIT),gtk)
 206 toolkit/library/target: widget/gtk/mozgtk/gtk3/target
 207 endif
 208
 209 # Most things are built during compile (target/host), but some things happen during export
 210 # Those need to depend on config/export for system wrappers.
 211 $(addprefix build/unix/stdc++compat/,target host) build/clang-plugin/host: config/export
 212
 213 # Rust targets, and export targets that run cbindgen need
 214 # $topobjdir/.cargo/config to be preprocessed first. Ideally, we'd only set it
 215 # as a dependency of the rust targets, but unfortunately, that pushes Make to
 216 # execute them much later than we'd like them to be when the file doesn't exist
 217 # prior to Make running. So we also set it as a dependency of pre-export, which
 218 # ensures it exists before recursing the rust targets and the export targets
 219 # that run cbindgen, tricking Make into keeping them early.
 220 $(rust_targets) gfx/webrender_bindings/export layout/style/export xpcom/base/export: $(DEPTH)/.cargo/config
 221 ifndef TEST_MOZBUILD
 222 pre-export:: $(DEPTH)/.cargo/config
 223 endif
 224
 225 # When building gtest as part of the build (LINK_GTEST_DURING_COMPILE),
 226 # force the build system to get to it first, so that it can be linked
 227 # quickly without LTO, allowing the build system to go ahead with
 228 # plain gkrust and libxul while libxul-gtest is being linked and
 229 # dump-sym'ed.
 230 ifneq (,$(filter toolkit/library/gtest/rust/target,$(compile_targets)))
 231 toolkit/library/rust/target: toolkit/library/gtest/rust/target
 232 endif
 233 endif