[Bug bootstrap/96794] --with-build-config=bootstrap-lto-lean with --enable-link-mutex leads to poor LTRANS utilization

[matz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96794

--- Comment #9 from Michael Matz <matz at gcc dot gnu.org> ---
We could also punt: when enable-link-mutex we could artificially up the job
number for make to account for the waiting link steps.  I.e. when normally -jN
was given, the link step could be done under -j(N + nr-language - 1).  That
would lead to the
nr-of-languages-1 job server tokens taken up by the sleeping link steps to be
accounted for, and hence the (single running) link step still be able to use N
threads/processes in parallel.