New in version 3.4.
Specify whether to report the completion of each target.
This property specifies whether Makefile Generators should
add a progress message describing that each target has been completed.
If the property is not set the default is
ON. Set the property
OFF to disable target completion messages.
This option is intended to reduce build output when little or no work needs to be done to bring the build tree up to date.
CMAKE_TARGET_MESSAGES cache entry exists its value
initializes the value of this property.
Non-Makefile generators currently ignore this property.
See the counterpart property
RULE_MESSAGES to disable
everything except for target completion messages.