[cmake-developers] Idea for Multi-Toolchain Support

[Torsten at Robitzki.de]

> Am 24.12.2018 um 17:07 schrieb Kyle Edwards <kyle.edwards at kitware.com>:
> 
> On Sat, 2018-12-22 at 16:57 +0100, Torsten Robitzki wrote:
>> What I’m still missing is support to define dependencies between
>> different targets (build by different toolchains), so that I can
>> describe that I require a tool that is build with the HostToolChain,
>> to generate a file that is required by the part of the build, that is
>> using the CrossToolChain. And, of cause, if the source of that tool
>> changes, that tool have to be rebuild and the generated file from the
>> CrossToolChain part of the build have to be rebuild.
> 
> What about add_dependencies()? Is that sufficient, or is there
> something more that you need?

If it would be possible to use add_dependencies() to describe dependencies between two targets build with two different toolchains, then this would be sufficient:

   add_dependencies(signed_firmware TOOLCHAINS CrossToolChainA CrossToolChainB firmware_signing_tool TOOLCHAIN HostToolChain)


best regards,

Torsten