CMAKE_CROSS_CONFIGS

.. versionadded:: 3.17

Specifies a :ref:semicolon-separated list <CMake Language Lists> of configurations available from all build-<Config>.ninja files in the :generator:Ninja Multi-Config generator. This variable activates cross-config mode. Targets from each config specified in this variable can be built from any build-<Config>.ninja file. Custom commands will use the configuration native to build-<Config>.ninja. If it is set to all, all configurations from :variable:CMAKE_CONFIGURATION_TYPES are cross-configs. If it is not specified, or empty, each build-<Config>.ninja file will only contain build rules for its own configuration.

The value of this variable must be a subset of :variable:CMAKE_CONFIGURATION_TYPES.