[Bug bootstrap/84402] [meta] GCC build system: parallelism bottleneck

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84402

--- Comment #42 from Eric Gallager <egallager at gcc dot gnu.org> ---
Is this just about parallelism bottlenecks for the main build target (e.g. just
`make` or `make all`), or does it apply to other Makefile targets, too? (e.g.
the testsuite via `make check`, or docs via `make pdf` or something)