[CMake] How do I specify VTK minimum version?

[Elvis Stansvik]

2017-07-24 12:23 GMT+02:00 Rolf Eike Beer <eike at sf-mail.de>:
> Am Dienstag, 11. Juli 2017, 15:18:11 schrieb Victor Lamoine:
>> Hi,
>>
>> I am using CMake to set up a VTK project. Our project requires VTK to be
>> version 7.1 or newer. I'm using Ubuntu 16.04 with CMake 3.5.1.
>>
>
>> find_package(VTK 7.1 REQUIRED)
> […]
>>   The following configuration files were considered but not accepted:
>>
>>     /usr/local/lib/cmake/vtk-8.0/VTKConfig.cmake, version: 8.0.0
>>     /usr/lib/cmake/vtk-6.2/VTKConfig.cmake, version: 6.2.0
>>
>> I have also tried find_package(VTK 7.1*.0* REQUIRED), without success.
>>
>> Why isn't VTK 8.0.0 accepted? It is a greater version number so I expected
>> it to be ok. How do I specify that I want VTK 7.1 OR newer?
>
> It could be that VTK sets in it's config file "same major version"
> compatibility.

Indeed. This comment from VTKConfigVersion.cmake explains it:

# The created file sets PACKAGE_VERSION_EXACT if the current version string and
# the requested version string are exactly the same and it sets
# PACKAGE_VERSION_COMPATIBLE if the current version is >= requested version,
# but only if the requested major version is the same as the current one.

Elvis

>
> Eike
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