UNITY_BUILD_BATCH_SIZE

Specifies how many source code files will be included into a UNITY_BUILD source file.

If the property is not set, CMake will use the value provided by CMAKE_UNITY_BUILD_BATCH_SIZE.

By setting it to value 0 the generated unity source file will contain all the source files that would otherwise be split into multiple batches. It is not recommended to do so, since it would affect performance.