New in version 3.14.

ON / OFF boolean to control if the project file for a target should be one single file or multiple files.

The default behavior or when the property is OFF is to generate a project file for the target and then a sub-project file for each source group.

When this property is ON or if CMAKE_GHS_NO_SOURCE_GROUP_FILE is ON then only a single project file is generated for the target.

Supported on Green Hills MULTI.