[CMake] How to use CMAKE_POLICY?

[David Cole]

You could use if(POLICY (if 2.6.2 supports that... I think it does, but it
was very long ago......) to avoid the call on older CMakes.


On Thu, Dec 13, 2012 at 6:31 AM, Marcel Loose <loose at astron.nl> wrote:

> Hi all,
>
> I'm trying to figure out how to use the CMAKE_POLICY() command. I want to
> get rid of the warning on CMP0017. I've strategically placed
> "cmake_policy(PUSH)", "cmake_policy(SET CMP0017 OLD)", and
> "cmake_policy(POP)" which solves the problem when configuring with CMake
> 2.8.9.
>
> However, our project also needs to be compatible with CMake 2.6.2. The
> problem is that this older CMake now bails out with an error message:
>
> CMake Error at CMake/FindLAPACK.cmake:44 (cmake_policy):
>   Policy "CMP0017" is not known to this version of CMake.
>
> This sounds like a catch-22. I've fixed the warning for the new CMake, but
> get an error in return for the old CMake. What am I doing wrong??
>
> Best regards,
> Marcel Loose.
>
>
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