After many hours of scratching my head, I discovered that the line within scripts/interfaces/sheevaplug.cfg;
Needs altering to read;
See also https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=837989
Please read https://wiki.gentoo.org/wiki/Bugzilla/Guide
and complete your report.
You do not have to write a book but we need a complete information we can work with.
Sorry, bit of a late one last night.
The package is dev-embedded/openocd
I guess having "0" *as default* is preferable.