Duplicate swipl-win target on Windows

[DRKV333]

When trying to configure cmake on Windows in MSYS, I got this error:

CMake Error at packages/swipl-win/CMakeLists.txt:79 (add_executable):
  add_executable cannot create target "swipl-win" because another target with
  the same name already exists.  The existing target is an executable created
  in source directory "swipl-devel/src".  See
  documentation for policy CMP0002 for more details.

Which is caused by the windows specific swipl-win target, and the Qt based packages/swipl-win targets interfering with each other. https://github.com/SWI-Prolog/swipl-devel/blob/b91bcb590c59e694333c8c4e49a7c0edb5439fda/cmake/WindowsTargets.cmake#L10

https://github.com/SWI-Prolog/packages-swipl-win/blob/6e85a1cd60cecba9980d1b742a24a60f99a3a0aa/CMakeLists.txt#L79

I'm guessing the assumption is that Qt is not installed when using MSYS, but I had it installed, which resulted in duplicate targets. It would probably make sense to just disable package/swipl-win on Windows. Alternatively it could be renamed, or made optional, since the Qt terminal does seem to work fine on Windows too.

[JanWielemaker]

Good point. Originally, the idea was for the Qt console to replace the old Win32 swipl-win. The dependency setup and packaging isn't all that simple though while the Qt version uses many times the resources of the native Win32 version 😢 .

For now disabled the Qt console because adding it also requires verifying the packaging and post installation steps. See SWI-Prolog/swipl-devel@094d7623ca07b421ce111ddd1b4b5c26b5c89dd4

[JanWielemaker]

Closing as resolved.