如何在CMake中比较文件 [英] How to compare files in CMake

问题描述

有没有一种方法可以使用cmake比较文件？
我已经检查了 https://cmake.org中的所有参数/cmake/help/latest/command/file.html

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

推荐答案

cmake 可执行文件具有工具模式，当它执行一些有用的操作而不是项目的配置时。而 compare_files 是该模式的命令之一。

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.

用于获取CMake命令行工具模式的功能 CMakeLists.txt ，使用 execute_process 命令：

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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