Set bcc platform with -p option.

git-svn-id: http://bmkng.googlecode.com/svn/trunk@63 2a3afde7-ceff-d69e-269d-2b6c215c828a
Extern generation tweaks for new compiler.

git-svn-id: http://bmkng.googlecode.com/svn/trunk@64 2a3afde7-ceff-d69e-269d-2b6c215c828a