[CMake] Crosscompilation woes

[portolan]

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>
> *Cc:* 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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