A proper fix to include Solaris in the exception is needed before this can go upstream.

Not appropriate for upstream in current form.

XXX file upstream bug

--- libvpx-1.4.0/configure	2015-04-03 11:49:19.000000000 -0700
+++ libvpx-1.4.0/configure	2015-06-15 13:37:48.713588212 -0700
@@ -548,11 +548,7 @@
         # here rather than at option parse time because the target auto-detect
         # magic happens after the command line has been parsed.
         if ! enabled linux; then
-            if enabled gnu; then
-                echo "--enable-shared is only supported on ELF; assuming this is OK"
-            else
-                die "--enable-shared only supported on ELF for now"
-            fi
+            echo "--enable-shared is only supported on ELF; assuming this is OK"
         fi
     fi
     if [ -z "$CC" ] || enabled external_build; then