UNITY_BUILD_FILENAME_PREFIX

.. versionadded:: 4.2

By default, the unity file generated when :prop_tgt:UNITY_BUILD is enabled is of the form unity_<index>_<suffix>, where <suffix> is language-specific.

If several targets are using unity builds, the build output may give no indication which target a unity file belongs to. This property allows customizing the prefix of the generated unity file name. If unset, the default prefix unity_ is used.

Example usage:

.. code-block:: cmake

add_library(example_library source1.cxx source2.cxx source3.cxx)

set_target_properties(example_library PROPERTIES UNITY_BUILD True UNITY_BUILD_FILENAME_PREFIX "example_")