| CMP0049 |
| ------- |
| |
| Do not expand variables in target source entries. |
| |
| CMake 2.8.12 and lower performed and extra layer of variable expansion |
| when evaluating source file names: |
| |
| .. code-block:: cmake |
| |
| set(a_source foo.c) |
| add_executable(foo \${a_source}) |
| |
| This was undocumented behavior. |
| |
| The OLD behavior for this policy is to expand such variables when processing |
| the target sources. The NEW behavior for this policy is to issue an error |
| if such variables need to be expanded. |
| |
| This policy was introduced in CMake version 3.0. |
| CMake version |release| warns when the policy is not set and uses |
| OLD behavior. Use the cmake_policy command to set it to OLD or |
| NEW explicitly. |
