# CMP0195

Added in version 4.1.

Swift modules in build trees use the Swift module directory structure.

The Swift compiler emits several supplementary files that make up the interface to a Swift library. It accepts finding these files separately or in a single swiftmodule directory. The single file keeps things better organized and makes it easier to install the resulting products.

CMake versions 4.1 and above prefer to generate the modules in the directory structure when working with a new enough Swift compiler. This policy provides compatibility for projects that have not been updated to expect the new behavior.

The `OLD` behavior for this policy is to emit the interface files directly into the current binary directory. The `NEW` behavior for this policy is to gather the binary swiftmodule and other supplemental compiler outputs in a single Swift module directory.

This policy was introduced in CMake version 4.1. It may be set by `cmake_policy()` or `cmake_minimum_required()`. If it is not set, CMake does not warn, 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.