Function vs. Macro in CMake

Question

The official document of CMake 2.8.12 says about macro

When it is invoked, the commands recorded in the macro are first modified by rep

Answer 1

In other words, function pushes and pops new variable scope (variables created and changed exist only in the function), macro does not. However, you can override the function default behaviour with the PARENT_SCOPE parameter of the set command.