CMP0216 — CMake 4.4.2 Documentation

# CMP0216

Added in version 4.4.

Swift targets have a default project name.

CMake 4.3 and below did not compile Swift targets with `-package-name`. The package name is useful because Swift package access control makes types, functions, and properties visible to other libraries within the same package, but not from sources outside of the package. CMake 4.4 and above prefer to pass `-package-name` by default using the `PROJECT_NAME` variable value. This policy provides compatibility for projects that have not been updated to expect a package name.

Note

Package access control was added in Swift 5.8 and Xcode 15. This policy has no effect when using an earlier version of Swift or Xcode.

The `OLD` behavior for this policy is to build Swift source files without passing a package-name. The `NEW` behavior for this policy is to build Swift source files with a default package name from `PROJECT_NAME`.

Regardless of whether this policy is set, the `Swift_PACKAGE_NAME` target property may be set to explicitly specify or suppress a package name.

This policy was introduced in CMake version 4.4. 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.