Understanding cmake message requires examining multiple perspectives and considerations. message — CMake 4.2.0-rc3 Documentation. The CMake command-line tool displays STATUS to TRACE messages on stdout with the message preceded by two hyphens and a space. All other message types are sent to stderr and are not prefixed with hyphens. CMake之message ()函数的使用和打印变量值 - CSDN博客. CMake的message ()函数用于在构建过程中显示不同类型的提示信息，如STATUS、WARNING、AUTHOR_WARNING、SEND_ERROR和FATAL_ERROR。 FATAL_ERROR会导致构建停止，WARNING则不会。 此功能类似于C语言的printf、C++的std::cout和Qt的qDebug ()，常用于打印变量值和调试。 c++ - How to print variables in CMake?
Another key aspect involves, cmake uses curly braces for getting values of variables: I suggest to dump messages like below to not skip empty messages. Cmake failed to configure your project because it did not recognise variables in parentheses and considered $(PROJECT_SOURCE_DIR) to be a string literal as is. message — CMake 4.1.0 文档 - CMake 构建系统. Similarly, cMake 命令行工具将 STATUS 到 TRACE 消息显示在标准输出上，消息前缀为两个连字符和一个空格。 所有其他消息类型都发送到标准错误，并且没有连字符前缀。
Troubleshooting CMake: Common message () Errors and Solutions. message () is essential for providing feedback and debugging during the CMake build process. Using incorrect message types can lead to unexpected behavior. For example, using WARNING instead of FATAL_ERROR might not immediately stop the build process as intended. message — CMake 3.9.6 Documentation - devdoc.net.
Moreover, 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. How do I use message() in CMake? Building on this, you can use cmake -E echo <message> to be more platform independent (use ${CMAKE_COMMAND} instead of cmake, if you're running this via execute_process, add_custom_target or similar command from your cmake project).
CMAKE_MESSAGE_CONTEXT — CMake 4.1.1 Documentation. When enabled by the cmake --log-context command line option or the CMAKE_MESSAGE_CONTEXT_SHOW variable, the message() command converts the CMAKE_MESSAGE_CONTEXT list into a dot-separated string surrounded by square brackets and prepends it to each line for messages of log levels NOTICE and below. CMake Language Tutorial: Variables, Strings, and Messages.
This lesson covers the essentials of CMake syntax, including how to set and reference variables, understand scope, use string interpolation, and print debug messages with the message () command. CMAKE_MESSAGE_LOG_LEVEL — CMake 4.2.0-rc1 Documentation. When set, this variable specifies the logging level used by the message () command. Furthermore, valid values are the same as those for the --log-level command line option of the cmake (1) program.
📝 Summary
Throughout this article, we've investigated the multiple aspects of cmake message. These details not only teach, but also enable people to benefit in real ways.