For reference: I went with Brads suggestion: 
https://gitlab.kitware.com/cmake/cmake/issues/16356

which seems to be working fine.

Regards
/R

From: CMake [mailto:cmake-boun...@cmake.org] On Behalf Of Robert Bielik
Sent: den 10 oktober 2016 14:00
To: Craig Scott <craig.sc...@crascit.com>
Cc: Cmake@cmake.org
Subject: Re: [CMake] Crosscompilation woes

I am using a toolchain file! The CC and CXX environment variables are set by 
CMake (I assume, because I haven’t touched them).

I’ll disect the link to see what I’ve missed.

Regards
/R

From: Craig Scott [mailto:craig.sc...@crascit.com]
Sent: den 10 oktober 2016 13:56
To: Robert Bielik <robert.bie...@dirac.com<mailto:robert.bie...@dirac.com>>
Cc: Cmake@cmake.org<mailto:Cmake@cmake.org>
Subject: Re: [CMake] Crosscompilation woes

Don't use environment variables to set the ARM compilers in your situation, use 
a toolchain file to specify them instead. Your CMake experience will generally 
be smoother if you specify cross-compile details via toolchain files. If you 
are following the method in the stackoverflow link I mentioned last time, the 
host part of the build will then pick up the host compilers and the ARM part of 
the build will use the compilers from the toolchain file.


On Mon, Oct 10, 2016 at 10:50 PM, Robert Bielik 
<robert.bie...@dirac.com<mailto:robert.bie...@dirac.com>> wrote:
I’m trying to do this, but since I setup a cross compiling env. by setting 
C&C++ compiler, these settings get used when I run execute_process to setup the 
host build !! Thus I get the ARM version of the build tools anyway! :(

It seems that when execute_process is executed, the CC and CXX environment 
variables are set, which makes cmake use those when generating the makefiles.

Ideas are most welcome!

Regards
/R

From: Craig Scott 
[mailto:craig.sc...@crascit.com<mailto:craig.sc...@crascit.com>]
Sent: den 10 oktober 2016 10:47
To: Robert Bielik <robert.bie...@dirac.com<mailto:robert.bie...@dirac.com>>
Cc: Cmake@cmake.org<mailto:Cmake@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.bie...@dirac.com<mailto:robert.bie...@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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https://crascit.com



--
Craig Scott
Melbourne, Australia
https://crascit.com
-- 

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