On 3/26/20 3:40 AM, Martin Liška wrote:
Hi.
I'm suggesting to provide a warning when one uses -flto=jobserver
but we can't detect job server for some reason.
Patch can bootstrap on x86_64-linux-gnu and survives regression tests.
Ready to be installed in next stage1?
Thanks,
Martin
gcc/ChangeLog:
2020-03-26 Martin Liska <mli...@suse.cz>
PR driver/94330
* lto-wrapper.c (run_gcc): When using -flto=jobserver,
report warning when the jobserver is not detected.
Sounds like a useful warning. It would be even better if it said why.
jobserver_active_p() returns false under one of at least three distinct
conditions. If the function provided a status string in addition to
the boolean result, the string could be included in the text of
the warning.
As an aside, I'd expect -Wformat-diag to complain about the trailing
period:
+ warning (0, "jobserver is not available.");
Martin
