message
Display a message to the user.
message([<mode>] "message to display" ...)
The optional <mode>
keyword determines the type of message:
(none) = Important information STATUS = Incidental information WARNING = CMake Warning, continue processing AUTHOR_WARNING = CMake Warning (dev), continue processing SEND_ERROR = CMake Error, continue processing, but skip generation FATAL_ERROR = CMake Error, stop processing and generation DEPRECATION = CMake Deprecation Error or Warning if variable CMAKE_ERROR_DEPRECATED or CMAKE_WARN_DEPRECATED is enabled, respectively, else no message.
The CMake command-line tool displays STATUS messages on stdout and all other message types on stderr. The CMake GUI displays all messages in its log area. The interactive dialogs (ccmake and CMakeSetup) show STATUS messages one at a time on a status line and other messages in interactive pop-up boxes.
CMake Warning and Error message text displays using a simple markup language. Non-indented text is formatted in line-wrapped paragraphs delimited by newlines. Indented text is considered pre-formatted.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.5/command/message.html