+set_default arch target_os postproc_version
+
+# Check if we should build alternative libpostproc version instead of current
+if test "$postproc_version" = $ALT_PP_VER; then
+ LIBPOSTPROC_VERSION=$ALT_PP_VER
+ LIBPOSTPROC_VERSION_MAJOR=$ALT_PP_VER_MAJOR
+ LIBPOSTPROC_VERSION_MINOR=$ALT_PP_VER_MINOR
+ LIBPOSTPROC_VERSION_MICRO=$ALT_PP_VER_MICRO
+elif test "$postproc_version" != current; then
+ die "Invalid argument to --postproc-version. See --help output."
+fi