libvpx: Pull from upstream

source/libvpx/build/make/configure.sh

 #!/bin/sh
 ##
 ##  configure.sh
 ##
 ##  This script is sourced by the main configure script and contains
 ##  utility functions and other common bits that aren't strictly libvpx
 ##  related.
 ##
 ##  This build system is based in part on the FFmpeg configure script.
 ##
@@ skipping 1042 matching lines @@
                 AS=${AS:-nasm}
                 ;;
         esac
 
         AS="${alt_as:-${AS:-auto}}"
         case  ${tgt_cc} in
             icc*)
                 CC=${CC:-icc}
                 LD=${LD:-icc}
                 setup_gnu_toolchain
-                add_cflags -use-msasm -use-asm
-                add_ldflags -i-static
-                enabled x86_64 && add_cflags -ipo -no-prec-div -static -xSSE2 -axSSE2
+                add_cflags -use-msasm  # remove -use-msasm too?
+                # add -no-intel-extensions to suppress warning #10237
+                # refer to http://software.intel.com/en-us/forums/topic/280199
+                add_ldflags -i-static -no-intel-extensions
+                enabled x86_64 && add_cflags -ipo -static -O3 -no-prec-div
                 enabled x86_64 && AR=xiar
                 case ${tune_cpu} in
                     atom*)
                         tune_cflags="-x"
                         tune_cpu="SSE3_ATOM"
                     ;;
                     *)
                         tune_cflags="-march="
                     ;;
                 esac
@@ skipping 23 matching lines @@
         soft_enable sse3
         soft_enable ssse3
         # We can't use 'check_cflags' until the compiler is configured and CC is
         # populated.
         if enabled gcc && ! disabled sse4_1 && ! check_cflags -msse4; then
             RTCD_OPTIONS="${RTCD_OPTIONS}--disable-sse4_1 "
         else
             soft_enable sse4_1
         fi
 
+        if enabled gcc && ! disabled avx && ! check_cflags -mavx; then
+            RTCD_OPTIONS="${RTCD_OPTIONS}--disable-avx "
+        else
+            soft_enable avx
+        fi
+
+        if enabled gcc && ! disabled avx2 && ! check_cflags -mavx2; then
+            RTCD_OPTIONS="${RTCD_OPTIONS}--disable-avx2 "
+        else
+            soft_enable avx2
+        fi
+
         case "${AS}" in
             auto|"")
                 which nasm >/dev/null 2>&1 && AS=nasm
                 which yasm >/dev/null 2>&1 && AS=yasm
                 [ "${AS}" = auto -o -z "${AS}" ] \
                     && die "Neither yasm nor nasm have been found"
             ;;
         esac
         log_echo "  using $AS"
         [ "${AS##*/}" = nasm ] && add_asflags -Ox
@@ skipping 213 matching lines @@
     # Prepare the PWD for building.
     for f in ${OOT_INSTALLS}; do
             install -D ${source_path}/$f $f
     done
     fi
     cp ${source_path}/build/make/Makefile .
 
     clean_temp_files
     true
 }