[Qgis-developer] Processor Count

[Matthias Kuhn]

That only works for CMake based projects.

I don't know if there's a possibility to use ninja with PyQt5, it's best
to resort to -jN there afaik.


On 4/2/17 8:29 PM, Gordon McLeod wrote:
> Thanks.  I will try it.  
>
> Without hard coding, how does one propagate to sub-folders?  
> I would like to use it also in building PyQt5 and that has about 10 sub-folders with Makefiles.
>
> -----Original Message-----
> From: Qgis-developer [mailto:qgis-developer-bounces at lists.osgeo.org] On Behalf Of Matthias Kuhn
> Sent: Sunday, April 2, 2017 11:40 AM
> To: Sebastiaan Couwenberg <sebastic at xs4all.nl>
> Cc: qgis-developer at lists.osgeo.org
> Subject: Re: [Qgis-developer] Processor Count
>
> Hi Gordon,
>
> As an alternative, you can use the -GNinja argument which will cause CMake to generate a project that uses ninja instead of make. Ninja does some smart things by default, like for example using multiple cores in parallel.
> Many of the QGIS devs started to appreciate this.
>
> Matthias
>
> On 4/2/17 7:31 PM, Sebastiaan Couwenberg wrote:
>> On 04/02/2017 07:25 PM, Gordon McLeod wrote:
>>> I was wondering why the CMakeLists.txt file made no use of this CMake feature, doesn’t it work or is there some other reason?
>>>
>>> Rather than `make -j4` or `make -j8` this might make it automatic.
>>>
>>> >From Cmake documentation on ProcessorCount valid for AIX, cygwin, FreeBSD, HPUX, IRIX, Linux, Mac OS X, QNX, Sun and Windows:
>>>
>>> include(ProcessorCount)
>>>
>>> ProcessorCount(N)
>>>
>>> if(NOT N EQUAL 0)
>>>
>>>   set(CTEST_BUILD_FLAGS -j${N})
>>>
>>>   set(ctest_test_args ${ctest_test_args} PARALLEL_LEVEL ${N})
>>>
>>> endif()
>> Using all CPUs by default is not very nice. Only on dedicated build 
>> machines is using all cores a good default, on other systems at least 
>> one core needs to remain available for the systems other tasks.
>>
>> Kind Regards,
>>
>> Bas
>>
> _______________________________________________
> Qgis-developer mailing list
> Qgis-developer at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
>
>