libvpx: Pull from upstream

source/libvpx/build/make/Makefile

 ##
 ##  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 ##
 ##  Use of this source code is governed by a BSD-style license
 ##  that can be found in the LICENSE file in the root of the source
 ##  tree. An additional intellectual property rights grant can be found
 ##  in the file PATENTS.  All contributing project authors may
 ##  be found in the AUTHORS file in the root of the source tree.
 ##
 
@@ skipping 76 matching lines @@
 # Common rules"
 #
 .PHONY: all
 all:
 
 .PHONY: clean
 clean::
         rm -f $(OBJS-yes) $(OBJS-yes:.o=.d) $(OBJS-yes:.asm.s.o=.asm.s)
         rm -f $(CLEAN-OBJS)
 
+.PHONY: clean
+distclean: clean
+        if [ -z "$(target)" ]; then \
+      rm -f Makefile; \
+      rm -f config.log config.mk; \
+      rm -f vpx_config.[hc] vpx_config.asm; \
+    else \
+      rm -f $(target)-$(TOOLCHAIN).mk; \
+    fi
+
 .PHONY: dist
 dist:
 .PHONY: install
 install::
 .PHONY: test
 test::
 .PHONY: testdata
 testdata::
 
 # Add compiler flags for intrinsic files
@@ skipping 193 matching lines @@
         $(qexec)lipo -output $$@ -create $$?
 endef
 
 
 #
 # Get current configuration
 #
 ifneq ($(target),)
 include $(SRC_PATH_BARE)/$(target:-$(TOOLCHAIN)=).mk
 endif
-ifeq ($(filter clean,$(MAKECMDGOALS)),)
+ifeq ($(filter %clean,$(MAKECMDGOALS)),)
   # Older versions of make don't like -include directives with no arguments
   ifneq ($(filter %.d,$(OBJS-yes:.o=.d)),)
     -include $(filter %.d,$(OBJS-yes:.o=.d))
   endif
 endif
 
 #
 # Configuration dependent rules
 #
 $(call pairmap,install_map_templates,$(INSTALL_MAPS))
@@ skipping 94 matching lines @@
 ifeq ($(CONFIG_EXTERNAL_BUILD),yes)
     BUILD_TARGETS += .projects
     INSTALL_TARGETS += .install-projects
 endif
 BUILD_TARGETS += .docs .libs .bins
 INSTALL_TARGETS += .install-docs .install-srcs .install-libs .install-bins
 all: $(BUILD_TARGETS)
 install:: $(INSTALL_TARGETS)
 dist: $(INSTALL_TARGETS)
 test::