# BASE_DIRS

Added in version 4.4.

List of base directories of the file set. The `target_sources()` command sets or adds to the `BASE_DIRS` file set property and is the usual way to manipulate it.

Contents of `BASE_DIRS` may use `generator expressions`.

Any relative paths are considered relative to the target's source directory. No two base directories for a file set may be sub-directories of each other. This requirement must be met across all base directories added to a file set.