libvpx: Pull from upstream

source/libvpx/examples.mk

 ##
 ##  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 263 matching lines @@
 DIST-BINS-$(NOT_MSVS)      += $(addprefix bin/,$(ALL_EXAMPLES:.c=$(EXE_SFX)))
 INSTALL-BINS-$(NOT_MSVS)   += $(addprefix bin/,$(UTILS:.c=$(EXE_SFX)))
 DIST-SRCS-yes              += $(ALL_SRCS)
 INSTALL-SRCS-yes           += $(UTIL_SRCS)
 OBJS-$(NOT_MSVS)           += $(call objs,$(ALL_SRCS))
 BINS-$(NOT_MSVS)           += $(addprefix $(BUILD_PFX),$(ALL_EXAMPLES:.c=$(EXE_SFX)))
 
 
 # Instantiate linker template for all examples.
 CODEC_LIB=$(if $(CONFIG_DEBUG_LIBS),vpx_g,vpx)
-SHARED_LIB_SUF=$(if $(filter darwin%,$(TGT_OS)),.dylib,.so)
+ifneq ($(filter darwin%,$(TGT_OS)),)
+SHARED_LIB_SUF=.dylib
+else
+ifneq ($(filter os2%,$(TGT_OS)),)
+SHARED_LIB_SUF=_dll.a
+else
+SHARED_LIB_SUF=.so
+endif
+endif
 CODEC_LIB_SUF=$(if $(CONFIG_SHARED),$(SHARED_LIB_SUF),.a)
 $(foreach bin,$(BINS-yes),\
     $(eval $(bin):$(LIB_PATH)/lib$(CODEC_LIB)$(CODEC_LIB_SUF))\
     $(eval $(call linker_template,$(bin),\
         $(call objs,$($(notdir $(bin:$(EXE_SFX)=)).SRCS)) \
         -l$(CODEC_LIB) $(addprefix -l,$(CODEC_EXTRA_LIBS))\
         )))
 
 # The following pairs define a mapping of locations in the distribution
 # tree to locations in the source/build trees.
@@ skipping 66 matching lines @@
               "pieces like the samples are. Their source is included here"\
               "for reference. The following utilities are included:" >> $@
         @$(foreach ex,$(sort $(UTILS:.c=)),\
            echo "     - \subpage example_$(ex) $($(ex).DESCRIPTION)" >> $@;)
         @echo "*/" >> $@
 
 CLEAN-OBJS += examples.doxy samples.dox $(ALL_EXAMPLES:.c=.dox)
 DOCS-yes += examples.doxy samples.dox
 examples.doxy: samples.dox $(ALL_EXAMPLES:.c=.dox)
         @echo "INPUT += $^" > $@