How to Use Message() In Cmake?

In CMake, the message() command is used to print text to the console during the CMake configure step. This can be useful for displaying information or debugging messages while the CMake script is running. The syntax for using message() is:

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message([<mode>] "message to display")

The <mode> parameter is optional and can be used to specify the type of message being displayed, such as STATUS, WARNING, AUTHOR_WARNING, SEND_ERROR, or FATAL_ERROR. If no mode is specified, STATUS is used by default.

For example, you can use message() to display a status message like this:

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message(STATUS "Configuring project...")

Or you can display a warning message like this:

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message(WARNING "This is a warning message")

By using message() in your CMake script, you can provide feedback and information to the user or developer running the script.

How to display a debug message using message() in cmake?

To display a debug message using the message() command in CMake, you can use the following syntax:

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message(STATUS "Your debug message here")

The "STATUS" argument specifies that the message is informational and will be displayed to the user. You can also use other arguments such as "WARNING" or "ERROR" to customize the type of message displayed.

For example, to display a debug message with a warning level, you can use:

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message(WARNING "This is a warning debug message")

Remember to run CMake with the appropriate command line options or IDE settings to view the debug messages in the console output.

How to display a status message using message() in cmake?

To display a status message using message() in CMake, you can simply use the following syntax:

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message(STATUS "Your status message here")

For example:

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message(STATUS "Configuring project...")

This will display the status message "Configuring project..." in the CMake output when the CMake configuration is run. You can use this to provide informational messages to users or developers during the build process.

How to display multiple messages using message() in cmake?

To display multiple messages using message() in CMake, you can simply call the message() function multiple times with each message you want to display. Here is an example:

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message("First message")
message("Second message")
message("Third message")

When you generate a build using CMake, these messages will be displayed in the console output. Each message will appear on a new line.

How to display a summary message using message() in cmake?

To display a summary message using message() in CMake, you can simply use the following syntax:

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message(STATUS "Summary message goes here")

For example, if you want to display a summary message saying "Build configuration complete", you would write:

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message(STATUS "Build configuration complete")

This will display the message in the CMake console when the script is executed. The STATUS argument is used to display the message as an informational message. You can also use WARNING or ERROR instead of STATUS depending on the severity of the message.

What is the significance of summary messages in cmake?

Summary messages in CMake are important for providing feedback to the user about the outcome of the configuration process. They typically show key information such as the version of CMake being used, the platform being targeted, the compiler being used, the build type, and any custom options or variables that have been set during configuration.

These summary messages help to ensure that the user is aware of the configuration settings being used and can help troubleshoot any issues that may arise during the build process. They can also provide a useful reference for documenting the configuration of a project.

How to display messages based on certain conditions using message() in cmake?

You can use the if statement in CMake to check certain conditions and display messages using the message() function. Here is an example of how you can display messages based on certain conditions:

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if(CONDITION)
    message("Condition is true")
else()
    message("Condition is false")
endif()

In this example, replace CONDITION with the actual condition you want to check. If the condition is true, it will display "Condition is true", and if it is false, it will display "Condition is false".

You can also use different message levels such as STATUS, WARNING, AUTHOR_WARNING, SEND_ERROR and FATAL_ERROR depending on the severity of the message you want to display. Here is an example using WARNING level:

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if(CONDITION)
    message(WARNING "This is a warning message")
endif()

This will display a warning message only if the condition is true. You can customize the messages to be displayed based on your specific requirements.