utils.cmake conflict

[JasonMarechal25]

What version of OR-Tools and what language are you using?
Version: main/v9.10
Language: C++

Or-tools-rte and or-tools can be integrated transparently through CMake FetchContent mecanism. One issue arise when a client define a utils.cmake file in CMAKE_MODULE_PATH. Or-tools defines a utils.cmake file and appends it to CMAKE_MODULE_PATH with include. When trying to solve names, CMake behaves like c++ INCLUDE_PATH, meaning it's first come first serve. In this example utils.cmake will be found in the client path, not or-tools and thus or-tools will be missing functions defined in the file.

Example :

• Xpansion defines utils.cmake
• Or-tools defines it too

Propositions:

• Open an issue with or-tools and ask them to use a less generic name.
• Create a patch to rename the file as utils-or-tools.cmake and update the corresponding include directive