[Qt-creator] "-j" options to make. Where do they come from? Can I change the value?

[André Hartmann]

Dear Toralf,

The jobs option was introduced in response to
https://bugreports.qt.io/browse/QTCREATORBUG-18414

You can fine tune that in the Projects > Build & Run > Build > Build
Steps. It should also be possible to add a smaller jobs option (e.g.
-j2) to the MAKEFLAGS variable so new projects use that.

 > If I have 4 jobs with 4 cores, that can mean all of them are
 > saturated, and the system becomes completely unresponsive.

I only have this problem if I specify more jobs than available cores.

Best regards,
André

Am 09.02.22 um 11:13 schrieb Toralf Lund:
> I'm using Qt Creator on a system that has 4 CPU cores. It seams like
> that means "make" will always be run with argument "-j4". Is there a way
> I can change the number 4 to something smaller? Where does the option
> come from anyway?
>
> A problem I have is that certain compile or link steps will use all the
> capacity of one core, and parallel jobs typically start on separate
> cores. If I have 4 jobs with 4 cores, that can mean all of them are
> saturated, and the system becomes completely unresponsive. Meaning I
> have to just sit and wait for the build to finish, while I prefer to run
> it "in the background" (even if it it takes longer that way) and
> continue to work on something else.
>
> OS is CentOS Stream 8.
>
> - Toralf
>
>
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