Re: cc-mode totally broken

[Richard M. Stallman]

    I often see inexplicable errors after doing "make bootstrap".  I've
    found that, horrible though it sounds, they all go away if I
    _completely delete_ my CVS directory, and get a clean checkout, and
    start over.  I guess there's some flaw in the makefile somewhere that
    causes it to fail to rebuild something important.

Next time this happens, could you do ls -lt on some directories,
and see if any non-source file is old?