Mine

root@maxi:/DEVEL/embedded/astfin/dl/freeswitch# diff -u build/config/config.sub.orig  build/config/config.sub
--- build/config/config.sub.orig        2007-04-30 21:02:35.000000000 +0000
+++ build/config/config.sub     2007-04-30 21:10:31.000000000 +0000
@@ -226,6 +226,7 @@
        # Recognize the basic CPU types without company name.
        # Some are omitted here because they have special meanings below.
        1750a | 580 \
+       | bfin \
        | a29k \
        | alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
        | alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
@@ -292,6 +293,7 @@
                ;;
        # Recognize the basic CPU types with company name.
        580-* \
+       | bfin-* \
        | a29k-* \
        | alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
        | alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \