[QGIS-Developer] QGIS 3.8.0 on FreeBSD: build takes several hours

[Loïc Bartoletti]

Hi,

Personally on my build machine [1] I've never had a problem to build 
QGIS master.

Rainer, some questions:

  - did you compile from scratch or via our infrastructure 
(ports/poudriere/synth?)?

- did you have the same problem with FreeBSD 11 or 12?

- can you try with llvm 6 or 7 from ports (I think that FreeBSD 13 have 
llvm 8 by default)?

Regards,

Loïc

[1] A jail with clang 6, qt 5.12, gdal 2.4.1, proj 5.1.0

Le 24/06/2019 à 13:33, Rainer Hurling a écrit :
> Am 24.06.19 um 13:02 schrieb Nyall Dawson:
>> On Mon, 24 Jun 2019 at 20:48, Rainer Hurling <rhurlin at gwdg.de> wrote:
>>> Hi Nyall,
>>>
>>> Am 24.06.19 um 01:33 schrieb Nyall Dawson:
>>>> On Sat, 22 Jun 2019 at 16:55, Rainer Hurling <rhurlin at gwdg.de> wrote:
>>>>> As the maintainer of the QGIS port for FreeBSD, I am preparing a port
>>>>> for the recent update to QGIS 3.8.0.
>>>>>
>>>>>
>>>>> This seems to happen since #18fb3f2 [1] (committed 2019-05-13, submitted
>>>>> 2019-04-30). Before the commit, the build process takes a normal
>>>>> duration on FreeBSD.
>>>>>
>>>>> As far as I can say, the problem occurs with both proj-5.1.0 and
>>>>> proj-6.1.0. GDAL version is 2.4.1, the OS is FreeBSD 13-0 CURRENT amd64.
>>>>>
>>>> Hmm - perplexing. Most of that commit should be ifdefed out for proj <
>>>> 6 builds. I wonder if you tried trimming the contents of
>>>> qgscoordinatereferencesystem_legacy.h to just a couple of sample lines
>>>> as a test? Maybe there's something in the compiler which doesn't like
>>>> the large static QMap...
>>>>
>>>> Nyall
>>>>
>>> Many thanks for your response.
>>>
>>> After trimming the contents of qgscoordinatereferencesystem_legacy.h
>>> (about 10 lines left), it builds in a normal time again.
>>>
>>> So it is likely, that the problem on FreeBSD has something to do with
>>> its compiler suite? I am using FreeBSD clang version 8.0.1
>>> (branches/release_80 363030) (based on LLVM 8.0.1).
>>>
>>> Is there any workaround, which lets me use the whole contents again?
>> You could try swapping the QMap for a std::unordered_map and see if
>> there's any benefit.
>>
>> Nyall
>>
> I am afraid I have no clue how to do this, because I am not a c++ coder.
>
> Is it within qgscoordinatereferencesystem_legacy.h
> (sAuthIdToQgisSrsIdMap?) or better in qgscoordinatereferencesystem.cpp
> (at lines:386-405?).
>
> As I said in my initial posting, the build duration problem exists on
> both, proj 5.1.0 and 6.1.0 on FreeBSD ...
>
> Rainer
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