[CMake] Cross Compiling

[Daniel Stonier]

2010/1/4 David Cole <david.cole at kitware.com>

> Are you following the directions here?
> http://www.cmake.org/Wiki/CMake_Cross_Compiling
>
> Or trying to cross compile some other way...?
>
>
> Yes, that's where I got started - been using that for quite a while. Just
noticed some loose ends recently. Note - if I follow that for something like
the eldk example (used to do exactly that for a powerpc board),
CROSS_COMPILING never gets set because both host and target system names are
Linux. Doesn't stop you from compiling though.

Also, I just noticed the cpack modules for deb packages got a bit of a
facelift with 2.8.0 that might solve the problems there - will give them a
whirl shortly.

Thanks,
Daniel.


> On Mon, Jan 4, 2010 at 3:00 AM, Daniel Stonier <d.stonier at gmail.com>wrote:
>
>>
>> The more I use cmake, the more I find it difficult to bend in to shape to
>> cross compile. The original design doesn't seem to be designed for anything
>> more than windows-linux or linux-windows cross compiles.
>>
>> Some things I'm having to currently work around by creating my own
>> cross-compiling set of modules. My host is an amd64 linux and my target is
>> an arm linux.
>>
>> - You can't set CMAKE_SYSTEM_NAME to anything useful other than Linux,
>> which of course doesn't trigger the cross-compile variable CROSS_COMPILING
>> because the host is the same.
>> - There is no distinction between install prefixes for the target and the
>> host. Sometimes I'd like to put various build tools on the host system at
>> the same time as libs and binaries on the target root.
>> - Debian packaging in cpack will only ever put things in /usr, regardless
>> of cross-compiles or different CMAKE_INSTALL_PREFIX. Refer again to above
>> comment.
>>
>> Having some useful autotools install style variables (--prefix and
>> --exec-prefix), someway of utilising of proper gnu tuples (e.g.
>> arm-unknown-linux-gnueabi) would make things alot easier.
>>
>> Is this planned or is this something that could use a nudge to move into a
>> useful direction?
>>
>> Do many other people cross-compile much with cmake?
>>
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