# CMP0076

The `target_sources()` command converts relative paths to absolute.

In CMake 3.13 and above, the `target_sources()` command now converts relative source file paths to absolute paths in the following cases:

- Source files are added to the target’s `INTERFACE_SOURCES` property.
- The target’s `SOURCE_DIR` property differs from `CMAKE_CURRENT_SOURCE_DIR`.

A path that begins with a generator expression is always left unmodified.

This policy provides compatibility with projects that have not been updated to expect this behavior. The `OLD` behavior for this policy is to leave all relative source file paths unmodified. The `NEW` behavior of this policy is to convert relative paths to absolute according to above rules.

This policy was introduced in CMake version 3.13. CMake version 3.15.0-rc3 warns when the policy is not set and uses `OLD` behavior. Use the `cmake_policy()` command to set it to `OLD` or `NEW` explicitly.

Note

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