| CMP0013 |
| ------- |
| |
| Duplicate binary directories are not allowed. |
| |
| CMake 2.6.3 and below silently permitted add_subdirectory() calls to |
| create the same binary directory multiple times. During build system |
| generation files would be written and then overwritten in the build |
| tree and could lead to strange behavior. CMake 2.6.4 and above |
| explicitly detect duplicate binary directories. CMake 2.6.4 always |
| considers this case an error. In CMake 2.8.0 and above this policy |
| determines whether or not the case is an error. The ``OLD`` behavior for |
| this policy is to allow duplicate binary directories. The NEW |
| behavior for this policy is to disallow duplicate binary directories |
| with an error. |
| |
| This policy was introduced in CMake version 2.8.0. CMake version |
| |release| warns when the policy is not set and uses ``OLD`` behavior. Use |
| the :command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly. |
| |
| .. include:: DEPRECATED.txt |
