allow various x86 models with --tune

Originally committed as revision 4230 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/configure b/configure
index 8d6705b..6c2727b 100755 (executable)
--- a/configure
+++ b/configure
@@ -691,8 +691,11 @@ if test $tune != "generic"; then
            TUNECPU=ppc970
             POWERPCMODE="64bits"
        ;;
+       i[3456]86|pentium|pentiumpro|pentium-mmx|pentium[234]|prescott|k6|k6-[23]|athlon|athlon-tbird|athlon-4|athlon-[mx]p|winchip-c6|winchip2|c3|nocona)
+           CFLAGS="$CFLAGS -march=$tune"
+       ;;
        *)
-       echo "WARNING: unknown CPU "$tune", ignored"
+       echo "WARNING: unknown CPU \"$tune\", ignored"
        ;;
     esac
 fi