# INSTALL_PARALLEL

Added in version 3.30.

Enables parallel installation option for a project. The install code for each subdirectory added with `add_subdirectory` can run independently.

When using the Ninja Generators, enabling this property causes `install/local` targets have the console pool disabled, allowing them to run concurrently.

This property also provides the target `install/parallel`, which has an explicit dependency on the `install/local` target for each subdirectory.

> Added in version 3.31.

> When this property is enabled, `cmake --install` can be given the `-j <jobs>` or `--parallel <jobs>` option to specify a maximum number of jobs. The `CMAKE_INSTALL_PARALLEL_LEVEL` environment variable specifies a default parallel level if this option is not provided.

Calls to `install(CODE)` or `install(SCRIPT)` might depend on actions performed by an earlier `install()` command in a different directory such as files installed or variable settings. If the project has such order-dependent installation logic, parallel installation should be not be enabled, in order to prevent possible race conditions.