multiple targets with same names

[huand]

Hello, when adding several libs with CPMAddPackage, I get the following error because several libraries defines the "uninstall" target.
Example of error:

CMake Error at /home/hubert/.cache/CPM/eigen/36d46e474d95627b67830e4f72c75dd26d7e34f6/CMakeLists.txt:644 (add_custom_target):
  add_custom_target cannot create target "uninstall" because another target
  with the same name already exists.  The existing target is a custom target
  created in source directory
  "/home/hubert/Documents/XXXXXX

any idea how to get around this?

[JohelEGP]

CMake targets are required to be uniquely named. The solution is for the mantainers of CMake buildsystems to add a unique prefix to their targets. If eigen isn't doing that, then maybe it's a new addition that should be reported and fixed, or their CMake buildsystem isn't made to be used through find_package (perhaps it exists solely to be used by CI and not for users to easily depend on their library).

[TheLartians]

You have to define your own targets if a library has bad CMake support. See the eigen snippet for an example how to do that.