How to compare files in CMake


Is there a way to compare files using cmake? I've checked all parameters from https://cmake.org/cmake/help/latest/command/file.html


cmake executable has a tool mode, when it performs some useful actions instead of project's configuration. And compare_files is one of the commands for that mode.

For get features of the CMake command line tool mode in the CMakeLists.txt, use execute_process command:

execute_process( COMMAND ${CMAKE_COMMAND} -E compare_files <file1> <file2> RESULT_VARIABLE compare_result ) if( compare_result EQUAL 0) message("The files are identical.") elseif( compare_result EQUAL 1) message("The files are different.") else() message("Error while comparing the files.") endif()



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