CMP0147

New in version 3.27.

Visual Studio Generators build custom commands in parallel.

Visual Studio 15.8 (2017) and newer support building custom commands in parallel. CMake 3.27 and above prefer to enable this behavior by adding a BuildInParallel setting to custom commands in .vcxproj files. This policy provides compatibility for projects that have not been updated to expect this, e.g., because their custom commands were accidentally relying on serial execution by MSBuild.

The OLD behavior for this policy is to not add BuildInParallel. The NEW behavior for this policy is to add BuildInParallel for VS 15.8 and newer.

This policy was introduced in CMake version 3.27. Use the cmake_policy() command to set it to OLD or NEW explicitly. Unlike many policies, CMake version 3.27.9 does not warn when this policy is not set and simply uses OLD behavior.

Note

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