rework parallel building to get rid of some warnings and add back support for...

rework parallel building to get rid of some warnings and add back support for parallelizing the kernel build fixes #3882

SVN-Revision: 12322

Makefile

@@ -20,7 +20,7 @@ ifneq ($(OPENWRT_BUILD),1)
   # but we can't include that file in this context
   empty:=
   space:= $(empty) $(empty)
-  _SINGLE=MAKEFLAGS=$(space)
+  _SINGLE=export MAKEFLAGS=$(space);
 
   override OPENWRT_BUILD=1
   export OPENWRT_BUILD
@@ -50,7 +50,7 @@ $(BUILD_DIR)/.prepared: Makefile
 
 clean: FORCE
 	rm -rf $(BUILD_DIR) $(BIN_DIR)
-	$(SUBMAKE) target/linux/clean
+	$(_SINGLE)$(SUBMAKE) target/linux/clean
 
 dirclean: clean
 	rm -rf $(STAGING_DIR) $(STAGING_DIR_HOST) $(STAGING_DIR_TOOLCHAIN) $(TOOLCHAIN_DIR) $(BUILD_DIR_HOST)
@@ -59,7 +59,7 @@ dirclean: clean
 tmp/.prereq_packages: .config
 	unset ERROR; \
 	for package in $(sort $(prereq-y) $(prereq-m)); do \
-		$(NO_TRACE_MAKE) -s -r -C package/$$package prereq || ERROR=1; \
+		$(_SINGLE)$(NO_TRACE_MAKE) -s -r -C package/$$package prereq || ERROR=1; \
 	done; \
 	if [ -n "$$ERROR" ]; then \
 		echo "Package prerequisite check failed."; \
@@ -72,7 +72,7 @@ prereq: $(target/stamp-prereq) tmp/.prereq_packages
 
 prepare: .config $(tools/stamp-install) $(toolchain/stamp-install)
 world: prepare $(target/stamp-compile) $(package/stamp-cleanup) $(package/stamp-compile) $(package/stamp-install) $(package/stamp-rootfs-prepare) $(target/stamp-install) FORCE
-	$(SUBMAKE) package/index
+	$(_SINGLE)$(SUBMAKE) package/index
 
 # update all feeds, re-create index files, install symlinks
 package/symlinks:

include/image.mk

@@ -10,6 +10,7 @@ include $(INCLUDE_DIR)/prereq.mk
 include $(INCLUDE_DIR)/kernel.mk
 include $(INCLUDE_DIR)/host.mk
 
+.NOTPARALLEL:
 override MAKEFLAGS=
 override MAKE:=$(SUBMAKE)
 KDIR=$(KERNEL_BUILD_DIR)

include/kernel-build.mk

@@ -80,25 +80,18 @@ define BuildKernel
 	[ -e "$(LINUX_CONFIG)" ] || touch "$(LINUX_CONFIG)"
 	$(LINUX_CONFCMD) > $(LINUX_DIR)/.config
 	touch $(LINUX_CONFIG)
-	$(MAKE) -C $(LINUX_DIR) $(KERNEL_MAKEOPTS) $$@
+	$(_SINGLE)$(MAKE) -C $(LINUX_DIR) $(KERNEL_MAKEOPTS) $$@
 	$(SCRIPT_DIR)/kconfig.pl '>' $(GENERIC_LINUX_CONFIG) $(LINUX_DIR)/.config > $(LINUX_CONFIG)
 	$(Kernel/Configure)
 
   install: $(LINUX_DIR)/.image
-	TARGET_BUILD="" $(MAKE) -C image compile install
+	+$(MAKE) -C image compile install TARGET_BUILD=
 
   clean: FORCE
 	rm -rf $(KERNEL_BUILD_DIR)
 
-  rebuild: FORCE
-	@$(MAKE) mostlyclean
-	@if [ -f $(LINUX_KERNEL) ]; then \
-		$(MAKE) clean; \
-	fi
-	@$(MAKE) compile
-
   image-prereq:
-	@$(NO_TRACE_MAKE) -s -C image prereq TARGET_BUILD=
+	@+$(NO_TRACE_MAKE) -s -C image prereq TARGET_BUILD=
 
   prereq: image-prereq
 

include/kernel-defaults.mk

@@ -69,11 +69,11 @@ endif
 
 define Kernel/Configure/2.4
 	$(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
-	$(MAKE) $(KERNEL_MAKEOPTS) oldconfig include/linux/compile.h include/linux/version.h
-	$(MAKE) $(KERNEL_MAKEOPTS) dep
+	$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig include/linux/compile.h include/linux/version.h
+	$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) dep
 endef
 define Kernel/Configure/2.6
-	-$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts
+	-$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts
 endef
 define Kernel/Configure/Default
 	$(LINUX_CONFCMD) > $(LINUX_DIR)/.config.target
@@ -86,12 +86,12 @@ endef
 
 define Kernel/CompileModules/Default
 	rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
-	$(MAKE) $(KERNEL_MAKEOPTS) modules
+	+$(MAKE) $(KERNEL_MAKEOPTS) modules
 endef
 
 define Kernel/CompileImage/Default
 	$(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init)
-	$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME)
+	+$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME)
 	$(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 	$(KERNEL_CROSS)objcopy -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
 endef
@@ -99,7 +99,7 @@ endef
 define Kernel/Clean/Default
 	rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 	rm -f $(LINUX_KERNEL)
-	$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
+	$(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 endef
 
 

include/subdir.mk

@@ -28,7 +28,7 @@ define subdir
     $(call warn,$(1),d,BD $(1)/$(bd))
     $(foreach target,$(SUBTARGETS),
       $(call warn_eval,$(1)/$(bd),t,T,$(1)/$(bd)/$(target): $(if $(QUILT),,$($(1)/$(bd)/$(target)) $(call $(1)//$(target),$(1)/$(bd))))
-		$(if $(findstring $(bd),$($(1)/builddirs-parallel)),$$(SUBMAKE),$$(SUBMAKE) -j1) \
+		+$(if $(findstring $(bd),$($(1)/builddirs-parallel)),$$(SUBMAKE),$(_SINGLE)$$(SUBMAKE) -j1) \
 			-C $(1)/$(bd) $(target) $(if $(findstring $(bd),$($(1)/builddirs-ignore-$(target))), || $(call MESSAGE,   ERROR: $(1)/$(bd) failed to build.))
         $$(if $(call debug,$(1)/$(bd),v),,.SILENT: $(1)/$(bd)/$(target))
 

include/toplevel.mk

@@ -47,22 +47,22 @@ prepare-tmpinfo: FORCE
 .config: ./scripts/config/conf prepare-tmpinfo $(if $(CONFIG_HAVE_DOT_CONFIG),,FORCE)
 	@+if [ \! -f .config ] || ! grep CONFIG_HAVE_DOT_CONFIG .config >/dev/null; then \
 		[ -e $(HOME)/.openwrt/defconfig ] && cp $(HOME)/.openwrt/defconfig .config; \
-		$(NO_TRACE_MAKE) menuconfig $(PREP_MK); \
+		$(_SINGLE)$(NO_TRACE_MAKE) menuconfig $(PREP_MK); \
 	fi
 
 scripts/config/mconf:
-	@$(SUBMAKE) -s -j1 -C scripts/config all
+	@$(_SINGLE)$(SUBMAKE) -s -C scripts/config all
 
 $(eval $(call rdep,scripts/config,scripts/config/mconf))
 
 scripts/config/conf:
-	@$(SUBMAKE) -s -j1 -C scripts/config conf
+	@$(_SINGLE)$(SUBMAKE) -s -C scripts/config conf
 
 config: scripts/config/conf prepare-tmpinfo FORCE
 	$< Config.in
 
 config-clean: FORCE
-	$(NO_TRACE_MAKE) -C scripts/config clean
+	$(_SINGLE)$(NO_TRACE_MAKE) -C scripts/config clean
 
 defconfig: scripts/config/conf prepare-tmpinfo FORCE
 	touch .config
@@ -78,10 +78,10 @@ menuconfig: scripts/config/mconf prepare-tmpinfo FORCE
 	$< Config.in
 
 kernel_oldconfig: .config FORCE
-	$(NO_TRACE_MAKE) -C target/linux oldconfig
+	$(_SINGLE)$(NO_TRACE_MAKE) -C target/linux oldconfig
 
 kernel_menuconfig: .config FORCE
-	$(NO_TRACE_MAKE) -C target/linux menuconfig
+	$(_SINGLE)$(NO_TRACE_MAKE) -C target/linux menuconfig
 
 tmp/.prereq-build: include/prereq-build.mk
 	mkdir -p tmp
@@ -103,7 +103,7 @@ clean dirclean: .config
 
 prereq:: .config
 	@+$(MAKE) -s tmp/.prereq-build $(PREP_MK)
-	@$(NO_TRACE_MAKE) -s $@
+	@+$(NO_TRACE_MAKE) -s $@
 
 %::
 	@+$(PREP_MK) $(NO_TRACE_MAKE) -s prereq
@@ -113,14 +113,14 @@ help:
 	cat README
 
 docs docs/compile: FORCE
-	@$(SUBMAKE) -j1 -C docs compile
+	@$(_SINGLE)$(SUBMAKE) -C docs compile
 
 docs/clean: FORCE
-	@$(SUBMAKE) -j1 -C docs clean
+	@$(_SINGLE)$(SUBMAKE) -C docs clean
 
 distclean:
 	rm -rf tmp build_dir staging_dir dl .config* feeds package/feeds package/openwrt-packages bin
-	@$(SUBMAKE) -j1 -C scripts/config clean
+	@$(_SINGLE)$(SUBMAKE) -C scripts/config clean
 
 ifeq ($(findstring v,$(DEBUG)),)
   .SILENT: symlinkclean clean dirclean distclean config-clean download help tmpinfo-clean .config scripts/config/mconf scripts/config/conf menuconfig tmp/.prereq-build tmp/.prereq-package prepare-tmpinfo

rules.mk

@@ -29,7 +29,7 @@ merge=$(subst $(space),,$(1))
 confvar=$(call merge,$(foreach v,$(1),$(if $($(v)),y,n)))
 strip_last=$(patsubst %.$(lastword $(subst .,$(space),$(1))),%,$(1))
 
-_SINGLE=MAKEFLAGS=$(space)
+_SINGLE=export MAKEFLAGS=$(space);
 ARCH:=$(call qstrip,$(shell echo $(CONFIG_ARCH) | sed -e 's/i[3-9]86/i386/'))
 BOARD:=$(call qstrip,$(CONFIG_TARGET_BOARD))
 TARGET_OPTIMIZATION:=$(call qstrip,$(CONFIG_TARGET_OPTIMIZATION))

target/linux/Makefile

@@ -10,4 +10,4 @@ include $(INCLUDE_DIR)/target.mk
 export TARGET_BUILD=1
 
 prereq clean download prepare compile install menuconfig oldconfig update refresh: FORCE
-	@$(NO_TRACE_MAKE) -C $(BOARD) $@
+	@+$(NO_TRACE_MAKE) -C $(BOARD) $@