Compiling PostgreSQL 8.0.3 under SCO OpsenServer6 following problems come out:
Unzip the PGSQL-code you get old files of config.guess und config.sub, which occurs an error.
The message of the errors includes a link where you can get the new version of these files, but this link is wrong.
You can get them under http://savannah.gnu.org/cgi-bin/viewcvs/*checkout*/config/config/.