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

native_client_sdk/src/examples/Makefile

 # 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
 #
 
 PROJECTS:= \
 [[for project in projects:]]
   {{project}} \
 [[]]
 
 HTTPD:={{rel_sdk}}/tools/httpd.py
 
+ifeq ($(TOOLCHAIN),all)
+TOOLCHAIN_ARG:=TOOLCHAIN=all
+endif
+
 # Define the default target
 all:
 
 #
 # Target Macro
 #
 # Macro defines a phony target for each example, and adds it to a list of
 # targets.
 #
+# Note: We use targets for each project (instead of an explicit recipe) so
+# each project can be built in parallel.
+#
 define TARGET
 TARGET_LIST+=$(1)_TARGET
 .PHONY: $(1)_TARGET
 $(1)_TARGET:
-        +$(MAKE) -C $(1)
-
-VERSIONS_LIST+=$(1)_VERSIONS
-.PHONY: $(1)_VERSIONS
-$(1)_VERSIONS:
-        +$(MAKE) -C $(1) all_versions
-
-CLEAN_LIST+=$(1)_CLEAN
-.PHONY: $(1)_CLEAN
-$(1)_CLEAN:
-        +$(MAKE) -C $(1) clean
+        +$(MAKE) -C $(1) $(TOOLCHAIN_ARG) $(MAKECMDGOALS)
 endef
 
 
 # Define the various targets via the Macro
 $(foreach proj,$(PROJECTS),$(eval $(call TARGET,$(proj))))
 
+.PHONY: all
 all: $(TARGET_LIST)
         @echo Done building targets.
 
-all_versions: $(VERSIONS_LIST)
-        @echo Done building all versions.
-
-clean: $(CLEAN_LIST)
+.PHONY: clean
+clean: $(TARGET_LIST)
         @echo Done cleaning targets.
 
+.PHONY: run
 run: all
         @echo Starting up python webserver.
         python $(HTTPD)
 
-# uppercase aliases (for backward compatibility)
+# Phony aliases for backward compatibility
 RUN: run
 
-.PHONY: RUN run
+all_versions:
+        +$(MAKE) TOOLCHAIN=all
+
+.PHONY: RUN all_versions