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How to Get A Verbose Output For Cmake?

2 minutes read

To get a verbose output for CMake, you can use the command line option "-DCMAKE_VERBOSE_MAKEFILE=ON" when running CMake. This will provide more detailed information during the build process, such as which files are being compiled and linked, and any errors or warnings that may occur. This can be helpful for troubleshooting build issues or understanding the build process better.


How to display detailed information during the cmake build process?

To display detailed information during the cmake build process, you can use the following command line options:

  1. Use the "-v" option to enable verbose output, which will display more detailed information about each step of the build process.
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cmake -v path/to/source


  1. Use the "-DCMAKE_VERBOSE_MAKEFILE=ON" option to display detailed information about the makefiles being generated by cmake.
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cmake -DCMAKE_VERBOSE_MAKEFILE=ON path/to/source


  1. Set the CMAKE_BUILD_TYPE variable to "Debug" to enable debug symbols and more detailed output during the build process.
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cmake -DCMAKE_BUILD_TYPE=Debug path/to/source


By using these options, you can get more detailed information during the cmake build process and troubleshoot any issues that may arise.


How to optimize cmake performance using verbose output?

If you want to optimize the performance of CMake using verbose output, you can use the following tips:

  1. Use the -H flag: This flag will print out the directory where CMakeLists.txt is located, helping you identify the source directory quickly.
  2. Use the -Wdev flag: This flag will print out more detailed information about the configuration process, including the flags and variables being set.
  3. Use the --trace option: This option will print out detailed information about the CMake execution process, including the commands being executed and the variables being set.
  4. Use the --debug-output option: This option will print out detailed information about the CMake execution process, including the commands being executed and the variables being set.


By using these flags and options, you can get more detailed information about the CMake configuration process, which can help you optimize its performance and troubleshoot any issues that may arise.


What commands can be used to obtain verbose output in cmake?

To obtain verbose output in CMake, the following commands can be used:

  1. cmake --debug-output: This command will print debugging information to the console.
  2. cmake --trace: This command will trace the execution of CMake and display detailed information about each step.
  3. cmake --trace-expand: This command will trace the expansion of variables in CMake and show the final values of each variable.
  4. cmake --trace-redirect=: This command will redirect the trace output to a specified file.
  5. cmake --warn-unused-vars: This command will display warnings for unused variables in CMake scripts.
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