[CMake] How to use --build and --parallel?

[Eric Noulard]

Le ven. 9 août 2019 à 06:44, Heng Zhou <hzhou3 at clemson.edu> a écrit :

> I am working on ubuntu 16.04, so the generator is the default "Unix
> Makefiles" which I did not specify. I don't think it is related to the lack
> of the parallel job number (I added 4 but with the same error). I just
> wanna confirm whether I wrote the syntax correctly. An example would
> suffice.
>

this sequence works for me on Debian 9 and CMake 3.13.2:

cd buildir
cmake -G /path/to/srcdir
cmake --build --parallel .


What kind or error do you get when you do that?



> On Fri, Aug 9, 2019 at 12:25 AM Eric Noulard <eric.noulard at gmail.com>
> wrote:
>
>>
>>
>> Le ven. 9 août 2019 à 04:40, Heng Zhou <hzhou3 at clemson.edu> a écrit :
>>
>>> Hi,
>>>
>>> I want to build a project using all cores of the machine. After cmake
>>> .., I have tried
>>>
>>> cmake --build --parallel .
>>>
>>> and
>>>
>>> cmake --build . --parallel
>>>
>>> , but none of them works. So, what is the correct usage of --build and
>>> --parallel when using them together? I have read the documentation
>>> https://cmake.org/cmake/help/latest/manual/cmake.1.html#build-tool-mode
>>> but still could not figure out. Thanks for your help.
>>>
>>
>> Try providing a number of parallel job after the --parallel option.
>> Depending on the native build tool used you won't get automatic number of
>> parallel jobs.
>> Which CMake generator are you using?
>>
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-- 
Eric
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