[NaCl SDK] Before bundling, clean all built libraries.

native_client_sdk/src/tools/common.mk

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 #
 # GNU Make based build file.  For details on GNU Make see:
 #   http://www.gnu.org/software/make/manual/make.html
 #
 
-
 #
 # Toolchain
 #
 # By default the VALID_TOOLCHAINS list contains newlib and glibc.  If your
 # project only builds in one or the other then this should be overridden
 # accordingly.
 #
 VALID_TOOLCHAINS?=newlib glibc
 TOOLCHAIN?=$(word 1,$(VALID_TOOLCHAINS))
 
 
 #
 # Top Make file, which we want to trigger a rebuild on if it changes
 #
 TOP_MAKE:=$(word 1,$(MAKEFILE_LIST))
 
 
 #
 # Figure out which OS we are running on.
 #
 GETOS=python $(NACL_SDK_ROOT)/tools/getos.py
 OSNAME:=$(shell $(GETOS))
 
 
 #
+# TOOLCHAIN=all recursively calls this Makefile for all VALID_TOOLCHAINS.
+#
+ifeq ($(TOOLCHAIN),all)
+
+# Define the default target
+all:
+
+#
+# Generate a new MAKE command for each TOOLCHAIN.
+#
+# Note: We use targets for each toolchain (instead of an explicit recipe) so
+# each toolchain can be built in parallel.
+#
+# $1 = Toolchain Name
+#
+define TOOLCHAIN_RULE
+TOOLCHAIN_TARGETS += $(1)_TARGET
+.PHONY: $(1)_TARGET
+$(1)_TARGET:
+        +$(MAKE) TOOLCHAIN=$(1) $(MAKECMDGOALS)
+endef
+
+#
+# The target for all versions
+#
+USABLE_TOOLCHAINS=$(filter $(OSNAME) newlib glibc pnacl,$(VALID_TOOLCHAINS))
+
+ifeq ($(NO_HOST_BUILDS),1)
+USABLE_TOOLCHAINS:=$(filter-out $(OSNAME),$(USABLE_TOOLCHAINS))
+endif
+
+# Define the toolchain targets for all usable toolchains via the macro.
+$(foreach tool,$(USABLE_TOOLCHAINS),$(eval $(call TOOLCHAIN_RULE,$(tool))))
+
+.PHONY: all clean install
+all: $(TOOLCHAIN_TARGETS)
+clean: $(TOOLCHAIN_TARGETS)
+install: $(TOOLCHAIN_TARGETS)
+
+else  # TOOLCHAIN=all
+
+#
 # Verify we selected a valid toolchain for this example
 #
 ifeq (,$(findstring $(TOOLCHAIN),$(VALID_TOOLCHAINS)))
   $(warning Availbile choices are: $(VALID_TOOLCHAINS))
   $(error Can not use TOOLCHAIN=$(TOOLCHAIN) on this example.)
 endif
 
 
 #
 # Build Configuration
@@ skipping 103 matching lines @@
 
 
 #
 # The install target is used to install built libraries to thier final destination.
 # By default this is the NaCl SDK 'lib' folder.
 #
 install:
 .PHONY: install
 
 
-#
-# Target a toolchain
-#
-# $1 = Toolchain Name
-#
-define TOOLCHAIN_RULE
-.PHONY: all_$(1)
-all_$(1):
-        +$(MAKE) TOOLCHAIN=$(1)
-TOOLCHAIN_LIST+=all_$(1)
-endef
-
-
-#
-# The target for all versions
-#
-USABLE_TOOLCHAINS=$(filter $(OSNAME) newlib glibc pnacl,$(VALID_TOOLCHAINS))
-
-ifeq ($(NO_HOST_BUILDS),1)
-USABLE_TOOLCHAINS:=$(filter-out $(OSNAME),$(USABLE_TOOLCHAINS))
-endif
-
-$(foreach tool,$(USABLE_TOOLCHAINS),$(eval $(call TOOLCHAIN_RULE,$(tool),$(dep))))
-
-.PHONY: all_versions
-all_versions: $(TOOLCHAIN_LIST)
-
-
 OUTBASE?=.
 OUTDIR:=$(OUTBASE)/$(TOOLCHAIN)/$(CONFIG)
 STAMPDIR?=$(OUTDIR)
 LIBDIR?=$(NACL_SDK_ROOT)/lib
 
 
 #
 # Target to remove temporary files
 #
 .PHONY: clean
@@ skipping 223 matching lines @@
             --enable-nacl-debug \
             --register-pepper-plugins="$(PPAPI_DEBUG),$(PPAPI_RELEASE)"
 
 
 # uppercase aliases (for backward compatibility)
 .PHONY: CHECK_FOR_CHROME DEBUG LAUNCH RUN
 CHECK_FOR_CHROME: check_for_chrome
 DEBUG: debug
 LAUNCH: run
 RUN: run
+
+endif  # TOOLCHAIN=all