client.mk

   1 # -*- makefile -*-
   2 # vim:set ts=8 sw=8 sts=8 noet:
   3 # This Source Code Form is subject to the terms of the Mozilla Public
   4 # License, v. 2.0. If a copy of the MPL was not distributed with this
   5 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   6
   7 # Defines main targets for driving the Firefox build system.
   8 #
   9 # This make file should not be invoked directly. Instead, use
  10 # `mach` (likely `mach build`) for invoking the build system.
  11 #
  12 # Options:
  13 #   MOZ_OBJDIR           - Destination object directory
  14 #   MOZ_MAKE_FLAGS       - Flags to pass to $(MAKE)
  15 #
  16 #######################################################################
  17
  18 ifndef MACH
  19 $(error client.mk must be used via `mach`. Try running \
  20 `./mach $(firstword $(MAKECMDGOALS) $(.DEFAULT_GOAL))`)
  21 endif
  22
  23 ### Load mozconfig options
  24 include $(OBJDIR)/.mozconfig-client-mk
  25
  26 ifdef MOZ_PARALLEL_BUILD
  27   MOZ_MAKE_FLAGS := $(filter-out -j%,$(MOZ_MAKE_FLAGS))
  28   MOZ_MAKE_FLAGS += -j$(MOZ_PARALLEL_BUILD)
  29 endif
  30
  31 # Automatically add -jN to make flags if not defined. N defaults to number of cores.
  32 ifeq (,$(findstring -j,$(MOZ_MAKE_FLAGS)))
  33   cores=$(shell python3 -c 'import multiprocessing; print(multiprocessing.cpu_count())')
  34   MOZ_MAKE_FLAGS += -j$(cores)
  35 endif
  36
  37 ### Set up make flags
  38 ifdef MOZ_AUTOMATION
  39 ifeq (4.0,$(firstword $(sort 4.0 $(MAKE_VERSION))))
  40 MOZ_MAKE_FLAGS += --output-sync=line
  41 endif
  42 endif
  43
  44 MOZ_MAKE = $(MAKE) $(MOZ_MAKE_FLAGS) -C $(OBJDIR)
  45
  46 ### Rules
  47 # The default rule is build
  48 build::
  49
  50 # In automation, manage an sccache daemon. The starting of the server
  51 # needs to be in a make file so sccache inherits the jobserver.
  52 ifdef MOZBUILD_MANAGE_SCCACHE_DAEMON
  53 build::
  54         # Terminate any sccache server that might still be around.
  55         -$(MOZBUILD_MANAGE_SCCACHE_DAEMON) --stop-server > /dev/null 2>&1
  56         # Start a new server, ensuring it gets the jobserver file descriptors
  57         # from make (but don't use the + prefix when make -n is used, so that
  58         # the command doesn't run in that case)
  59         mkdir -p $(UPLOAD_PATH)
  60         $(if $(findstring n,$(filter-out --%, $(MAKEFLAGS))),,+)env SCCACHE_LOG=sccache=debug SCCACHE_ERROR_LOG=$(UPLOAD_PATH)/sccache.log $(MOZBUILD_MANAGE_SCCACHE_DAEMON) --start-server
  61 endif
  62
  63 ### Build it
  64 build::
  65         +$(MOZ_MAKE)
  66
  67 ifdef MOZ_AUTOMATION
  68 build::
  69         +$(MOZ_MAKE) automation/build
  70 endif
  71
  72 # This makefile doesn't support parallel execution. It does pass
  73 # MOZ_MAKE_FLAGS to sub-make processes, so they will correctly execute
  74 # in parallel.
  75 .NOTPARALLEL:
  76
  77 .PHONY: \
  78     build