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* [Bug other/94330] New: No warning if jobserver not available
@ 2020-03-25 15:34 rdiezmail-gcc at yahoo dot de
2020-03-26 6:55 ` [Bug driver/94330] " rguenth at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: rdiezmail-gcc at yahoo dot de @ 2020-03-25 15:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330
Bug ID: 94330
Summary: No warning if jobserver not available
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: rdiezmail-gcc at yahoo dot de
Target Milestone: ---
If you pass -flto=jobserver , and the jobserver file descriptors are not
actually available, you get no warning whatsoever from GCC.
GNU Make does try to help in this scenario with the following warning:
make[1]: warning: jobserver unavailable: using -j1. Add `+' to parent make
rule.
Without such a warning, it is really easy to miss the opportunity to
parallelise the build. In fact, GCC seems to use 2 threads in this scenario,
which misleads you into thinking that the option is working correctly, when in
fact is not using all other CPU cores.
More context on this issue is here:
https://lists.gnu.org/archive/html/help-make/2020-02/msg00000.html
https://gcc.gnu.org/legacy-ml/gcc-help/2020-02/msg00069.html
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/94330] No warning if jobserver not available
2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de
@ 2020-03-26 6:55 ` rguenth at gcc dot gnu.org
2020-03-26 9:00 ` marxin at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-03-26 6:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|other |driver
Keywords| |lto
Ever confirmed|0 |1
Last reconfirmed| |2020-03-26
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/94330] No warning if jobserver not available
2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de
2020-03-26 6:55 ` [Bug driver/94330] " rguenth at gcc dot gnu.org
@ 2020-03-26 9:00 ` marxin at gcc dot gnu.org
2020-03-26 9:41 ` marxin at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-03-26 9:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
CC| |marxin at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch for it.
@Richi: Is it stage1 material or can we add it for GCC 10?
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/94330] No warning if jobserver not available
2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de
2020-03-26 6:55 ` [Bug driver/94330] " rguenth at gcc dot gnu.org
2020-03-26 9:00 ` marxin at gcc dot gnu.org
@ 2020-03-26 9:41 ` marxin at gcc dot gnu.org
2020-05-05 14:11 ` cvs-commit at gcc dot gnu.org
2020-05-05 14:13 ` marxin at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-03-26 9:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/piperma
| |il/gcc-patches/2020-March/5
| |42715.html
Keywords| |patch
Target Milestone|--- |11.0
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
I'm just sent the patch to the mailing list.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/94330] No warning if jobserver not available
2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de
` (2 preceding siblings ...)
2020-03-26 9:41 ` marxin at gcc dot gnu.org
@ 2020-05-05 14:11 ` cvs-commit at gcc dot gnu.org
2020-05-05 14:13 ` marxin at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-05-05 14:11 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Liska <marxin@gcc.gnu.org>:
https://gcc.gnu.org/g:0f62caf58b5d11f375f789385d6d49891ebd9a94
commit r11-81-g0f62caf58b5d11f375f789385d6d49891ebd9a94
Author: Martin Liska <mliska@suse.cz>
Date: Tue May 5 16:11:33 2020 +0200
Provide warning for missing jobserver.
PR driver/94330
* lto-wrapper.c (run_gcc): When using -flto=jobserver,
report warning when the jobserver is not detected.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/94330] No warning if jobserver not available
2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de
` (3 preceding siblings ...)
2020-05-05 14:11 ` cvs-commit at gcc dot gnu.org
@ 2020-05-05 14:13 ` marxin at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-05-05 14:13 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94330
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on master.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-05-05 14:13 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-03-25 15:34 [Bug other/94330] New: No warning if jobserver not available rdiezmail-gcc at yahoo dot de
2020-03-26 6:55 ` [Bug driver/94330] " rguenth at gcc dot gnu.org
2020-03-26 9:00 ` marxin at gcc dot gnu.org
2020-03-26 9:41 ` marxin at gcc dot gnu.org
2020-05-05 14:11 ` cvs-commit at gcc dot gnu.org
2020-05-05 14:13 ` marxin at gcc dot gnu.org
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