Feature or enhancement

Proposal:

Currently when building CPython with loto (./configure --with-lto) on linux with gcc gives a number of similar warnings:

lto-wrapper: warning: using serial compilation of 70 LTRANS jobs
lto-wrapper: note: see the ‘-flto’ option documentation for more information

To fix this pass the -flot=auto to allow gcc to run the lto jobs in parallel. If no value is passed the default in 1 at a time.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-137403: Pass auto to -flto with gcc to parallelize LTO build on linux #137404