[Scons-users] problem with "-j" option

[William Blevins]

Tom,

Also consider inspecting the DAG using "--tree" options to ensure that the
relationships are getting created as you expect.  It may be that the DAG
does not allow those elements to be built in parallel.

V/R,
William

On Sun, Apr 19, 2015 at 2:55 PM, Dirk Bächle <tshortik at gmx.de> wrote:

> Hi Tom,
>
>
> On 19.04.2015 18:35, Tom Lippincott wrote:
>
>> Hi everyone,
>>
>> Recently I've noticed that some of my custom builders refuse to run in
>> parallel with the "-j" option: they just execute serially.  Others
>> behave as expected.  I was wondering what could cause this/how to track
>> it down.  My current hypothesis is that something in their
>> implementation, or in the libraries they use, involves some sort of
>> shared-state that SCons detects and therefore refuses to parallelize.
>> Has anyone seen/resolved similar issues, or know where I should look?
>>
>>
> the first thing you should check, is whether the affected Builders use the
> SideEffect() method. It will enforce serial processing, even if "-j" is
> actually specified.
>
> Best regards,
>
> Dirk
>
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