I was running into a race condition when rebuilding seabios with a high cpu count,
resulting in failure with this error message:
cc1: fatal error: can't open 'out/src/asm-offsets.s' for writing: No such file or directory
Performing the silentoldconfig step before the full make step seems to resolve the failure.
this is forked from the "libre" branch in osboot, which is itself a libre,
deblobbed fork of osboot, a blobbed up fork of libreboot
libreboot needed to be purged clean. this is the new libreboot development
repository. the old one has been abandoned