libvpx: Pull from upstream

source/libvpx/configure

 #!/bin/sh
 ##
 ##  configure
 ##
 ##  This script is the front-end to the build system. It provides a similar
 ##  interface to standard configure scripts with some extra bits for dealing
 ##  with toolchains that differ from the standard POSIX interface and
 ##  for extracting subsets of the source tree. In theory, reusable parts
 ##  of this script were intended to live in build/make/configure.sh,
 ##  but in practice, the line is pretty blurry.
@@ skipping 33 matching lines @@
   ${toggle_realtime_only}         enable this option while building for real-time encoding
   ${toggle_onthefly_bitpacking}   enable on-the-fly bitpacking in real-time encoding
   ${toggle_error_concealment}     enable this option to get a decoder which is able to conceal losses
   ${toggle_runtime_cpu_detect}    runtime cpu detection
   ${toggle_shared}                shared library support
   ${toggle_static}                static library support
   ${toggle_small}                 favor smaller size over speed
   ${toggle_postproc_visualizer}   macro block / block level visualizers
   ${toggle_multi_res_encoding}    enable multiple-resolution encoding
   ${toggle_temporal_denoising}    enable temporal denoising and disable the spatial denoiser
+  ${toggle_webm_io}               enable input from and output to WebM container
 
 Codecs:
   Codecs can be selectively enabled or disabled individually, or by family:
       --disable-<codec>
   is equivalent to:
       --disable-<codec>-encoder
       --disable-<codec>-decoder
 
   Codecs available in this distribution:
 EOF
@@ skipping 89 matching lines @@
 
 # all_targets is a list of all targets that can be configured
 # note that these should be in dependency order for now.
 all_targets="libs examples docs"
 
 # all targets available are enabled, by default.
 for t in ${all_targets}; do
     [ -f ${source_path}/${t}.mk ] && enable_feature ${t}
 done
 
+if ! perl --version >/dev/null; then
+    die "Perl is required to build"
+fi
+
+
+if [ "`cd ${source_path} && pwd`" != "`pwd`" ]; then
+  # test to see if source_path already configured
+  if [ -f ${source_path}/vpx_config.h ]; then
+    die "source directory already configured; run 'make distclean' there first"
+  fi
+fi
+
 # check installed doxygen version
 doxy_version=$(doxygen --version 2>/dev/null)
 doxy_major=${doxy_version%%.*}
 if [ ${doxy_major:-0} -ge 1 ]; then
     doxy_version=${doxy_version#*.}
     doxy_minor=${doxy_version%%.*}
     doxy_patch=${doxy_version##*.}
 
     [ $doxy_major -gt 1 ] && enable_feature doxygen
     [ $doxy_minor -gt 5 ] && enable_feature doxygen
@@ skipping 72 matching lines @@
     ${ARCH_EXT_LIST}
     vpx_ports
     stdint_h
     alt_tree_layout
     pthread_h
     sys_mman_h
     unistd_h
 "
 EXPERIMENT_LIST="
     multiple_arf
-    non420
     alpha
 "
 CONFIG_LIST="
     external_build
     install_docs
     install_bins
     install_libs
     install_srcs
     use_x86inc
     debug
@@ skipping 27 matching lines @@
     spatial_resampling
     realtime_only
     onthefly_bitpacking
     error_concealment
     shared
     static
     small
     postproc_visualizer
     os_support
     unit_tests
+    webm_io
     decode_perf_tests
     multi_res_encoding
     temporal_denoising
     experimental
     decrypt
     ${EXPERIMENT_LIST}
 "
 CMDLINE_SELECT="
     external_build
     extra_warnings
@@ skipping 33 matching lines @@
     mem_tracker
     spatial_resampling
     realtime_only
     onthefly_bitpacking
     error_concealment
     shared
     static
     small
     postproc_visualizer
     unit_tests
+    webm_io
     decode_perf_tests
     multi_res_encoding
     temporal_denoising
     experimental
     decrypt
 "
 
 process_cmdline() {
     for opt do
         optval="${opt#*=}"
@@ skipping 302 matching lines @@
              enable_feature solution
              vs_version=${tgt_cc##vs}
              case $vs_version in
              [789])
                  VCPROJ_SFX=vcproj
                  gen_vcproj_cmd=${source_path}/build/make/gen_msvs_proj.sh
                  ;;
              10|11|12)
                  VCPROJ_SFX=vcxproj
                  gen_vcproj_cmd=${source_path}/build/make/gen_msvs_vcxproj.sh
+                 enabled werror && gen_vcproj_cmd="${gen_vcproj_cmd} --enable-werror"
                  ;;
              esac
              all_targets="${all_targets} solution"
              INLINE="__forceinline"
         ;;
     esac
 
     # Other toolchain specific defaults
     case $toolchain in x86*|ppc*|universal*) soft_enable postproc;; esac
 
     if enabled postproc_visualizer; then
         enabled postproc || die "postproc_visualizer requires postproc to be enabled"
     fi
 
+    # Enable WebM IO by default.
+    soft_enable webm_io
+
     # Enable unit tests by default if we have a working C++ compiler.
     case "$toolchain" in
         *-vs*)
             soft_enable unit_tests
         ;;
         *-android-*)
             # GTestLog must be modified to use Android logging utilities.
         ;;
         *-darwin-*)
             # iOS/ARM builds do not work with gtest. This does not match
@@ skipping 19 matching lines @@
 ##
 ## END APPLICATION SPECIFIC CONFIGURATION
 ##
 CONFIGURE_ARGS="$@"
 process "$@"
 print_webm_license ${BUILD_PFX}vpx_config.c "/*" " */"
 cat <<EOF >> ${BUILD_PFX}vpx_config.c
 static const char* const cfg = "$CONFIGURE_ARGS";
 const char *vpx_codec_build_config(void) {return cfg;}
 EOF