How to get only one file from Git repository?

In a CMakeLists.txt, I retrieve a Git repository with the commands:

How to get only one file from Git repository?

In a CMakeLists.txt, I retrieve a Git repository with the commands:

How to get only one file from Git repository?

In a CMakeLists.txt, I retrieve a Git repository with the commands:

How to get only one file from Git repository?

In a CMakeLists.txt, I retrieve a Git repository with the commands:

CMake: How to get only one file from Git repository?

In a CMakeLists.txt, I retrieve a Git repository with the commands :

CMake: How to get only one file from Git repository?

In a CMakeLists.txt, I retrieve a Git repository with the commands :

CMake’s add_compile_definitions adds backslashes and extra quotes in my string

I want to add