CMP0052

Added in version 3.1.

Reject source and build dirs in installed INTERFACE_INCLUDE_DIRECTORIES.

CMake 3.0 and lower allowed subdirectories of the source directory or build directory to be in the INTERFACE_INCLUDE_DIRECTORIES of installed and exported targets, if the directory was also a subdirectory of the installation prefix. This makes the installation depend on the existence of the source dir or binary dir, and the installation will be broken if either are removed after installation.

See Include Directories and Usage Requirements for more on specifying include directories for targets.

The OLD behavior for this policy is to export the content of the INTERFACE_INCLUDE_DIRECTORIES with the source or binary directory. The NEW behavior for this policy is to issue an error if such a directory is used.

This policy was introduced in CMake version 3.1. It may be set by cmake_policy() or cmake_minimum_required(). If it is not set, CMake warns, and uses OLD behavior.

Note

The OLD behavior of a policy is deprecated by definition and may be removed in a future version of CMake.