[CMake] Crosscompilation woes

[portolan]

I cannot answer your question: I am a newcomer to Cmake (I have been 
using it for less than 6 months) and on my build system I have 3.6, so I 
never really looked at the previous versions.

Sorry,


Michele


Le 10/10/2016 à 11:30, Robert Bielik a écrit :
>
> Thank you Michele,
>
> This is exactly what I’m after. You specify cmake v3.6 docs ? Is it 
> only working from 3.6.x ? I have 3.5.2 on my build system.
>
> Regards
>
> /Robert
>
> *From:*portolan [mailto:michele.portolan at imag.fr]
> *Sent:* den 10 oktober 2016 11:27
> *To:* Robert Bielik <Robert.Bielik at dirac.com>; Craig Scott 
> <craig.scott at crascit.com>
> *Cc:* Cmake at cmake.org
> *Subject:* Re: [CMake] Crosscompilation woes
>
> In my project I build on Linux i686 and I use a Toolchain file to 
> specify the ARM cross-compiler
>
> https://cmake.org/cmake/help/v3.6/manual/cmake-toolchains.7.html
>
> The nice thing is that if you mark some files as "generated" CMAKE 
> will automatically use the build rather than the target toolchains. 
> For instance, I have a Flex/Byson compiler that is generated locally 
> on i686 , but then compiled for ARM.
>
> Regards,
>
> Michele
>
> Le 10/10/2016 à 11:10, Robert Bielik a écrit :
>
>     Thanks Craig,
>
>     Your solution will work for me I think.
>
>     Regards
>
>     /R
>
>     *From:*Craig Scott [mailto:craig.scott at crascit.com]
>     *Sent:* den 10 oktober 2016 10:47
>     *To:* Robert Bielik <Robert.Bielik at dirac.com>
>     <mailto:Robert.Bielik at dirac.com>
>     *Cc:* Cmake at cmake.org <mailto:Cmake at cmake.org>
>     *Subject:* Re: [CMake] Crosscompilation woes
>
>     Here's one possible solution (not perfect, but has been working in
>     production for us for a while now for a similar scenario to what
>     you describe):
>
>     http://stackoverflow.com/q/36084785/1938798
>
>     An alternative is a superbuild arrangement which would require a
>     top level project to drive two sub-builds brought in via
>     ExternalProject
>     <https://cmake.org/cmake/help/latest/module/ExternalProject.html>,
>     one for the host and the other for arm. This is both better and
>     worse, depending on your point of view, so you may need to do some
>     research/experimenting to see which is a better fit for your
>     situation.
>
>     On Mon, Oct 10, 2016 at 7:29 PM, Robert Bielik
>     <Robert.Bielik at dirac.com <mailto:Robert.Bielik at dirac.com>> wrote:
>
>         Hi all,
>
>         I am crosscompiling a project for arm (on linux i686), and use
>         codegeneration tools within the project (together with
>         add_custom_command). Of course, this will fail, since the
>         tools are compiled for arm also and thus won't execute on my
>         host system. So the tools need to be compiled for i686 whilst
>         the rest for arm. I'm sure this can be handled by CMake
>         although haven't done it before so would appreciate pointers :)
>
>         Regards
>         /Robert
>
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>     Craig Scott
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>     Melbourne, Australia
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