Backed out changeset b3654ee48ff4 (bug 1683797) for causing frequent build timeouts as bug 1411358. CLOSED TREE

client.mk

@@ -14,16 +14,42 @@
 #   MOZ_MAKE_FLAGS       - Flags to pass to $(MAKE)
 #
 #######################################################################
+# Defines
 
-ifndef MACH
-$(error client.mk must be used via `mach`. Try running \
-`./mach $(firstword $(MAKECMDGOALS) $(.DEFAULT_GOAL))`)
+ifdef MACH
+ifndef NO_BUILDSTATUS_MESSAGES
+define BUILDSTATUS
+@echo 'BUILDSTATUS $1'
+
+endef
+endif
 endif
 
-### Load mozconfig options
+
+CWD := $(CURDIR)
+
+ifeq "$(CWD)" "/"
+CWD   := /.
+endif
+
+PYTHON3 ?= python3
+
+####################################
+# Load mozconfig Options
+
 include $(OBJDIR)/.mozconfig-client-mk
 
-### Set up make flags
+ifdef MOZ_PARALLEL_BUILD
+  MOZ_MAKE_FLAGS := $(filter-out -j%,$(MOZ_MAKE_FLAGS))
+  MOZ_MAKE_FLAGS += -j$(MOZ_PARALLEL_BUILD)
+endif
+
+# Automatically add -jN to make flags if not defined. N defaults to number of cores.
+ifeq (,$(findstring -j,$(MOZ_MAKE_FLAGS)))
+  cores=$(shell $(PYTHON3) -c 'import multiprocessing; print(multiprocessing.cpu_count())')
+  MOZ_MAKE_FLAGS += -j$(cores)
+endif
+
 ifdef MOZ_AUTOMATION
 ifeq (4.0,$(firstword $(sort 4.0 $(MAKE_VERSION))))
 MOZ_MAKE_FLAGS += --output-sync=line
@@ -32,10 +58,17 @@ endif
 
 MOZ_MAKE = $(MAKE) $(MOZ_MAKE_FLAGS) -C $(OBJDIR)
 
-### Rules
+#######################################################################
+# Rules
+
 # The default rule is build
 build::
 
+ifndef MACH
+$(error client.mk must be used via `mach`. Try running \
+`./mach $(firstword $(MAKECMDGOALS) $(.DEFAULT_GOAL))`)
+endif
+
 # In automation, manage an sccache daemon. The starting of the server
 # needs to be in a make file so sccache inherits the jobserver.
 ifdef MOZBUILD_MANAGE_SCCACHE_DAEMON
@@ -49,7 +82,9 @@ build::
 	$(if $(findstring n,$(filter-out --%, $(MAKEFLAGS))),,+)env SCCACHE_LOG=sccache=debug SCCACHE_ERROR_LOG=$(UPLOAD_PATH)/sccache.log $(MOZBUILD_MANAGE_SCCACHE_DAEMON) --start-server
 endif
 
-### Build it
+####################################
+# Build it
+
 build::
 	+$(MOZ_MAKE)