问题描述
我想直接在程序运行时直接在stdout上看到由 EXECUTE_PROCESS 命令启动的命令的输出。
I would like to directly see the output of a command started by the EXECUTE_PROCESS command on stdout while the program is running.
我有以下测试CMakeLists.txt文件
I have the following test CMakeLists.txt file
PROJECT(TEST)
cmake_minimum_required(VERSION 2.8)
EXECUTE_PROCESS(COMMAND dir)
从命令行运行时，它会生成
When run from the commandline it produces this
D:\tmp\testCMake\_build>"c:\Program Files (x86)\CMake 2.8\bin\cmake.exe" .
-- Configuring done
-- Generating done
-- Build files have been written to: D:/tmp/testCMake/_build
我想直接在控制台上查看 dir 的输出。
I would like to see the output from dir directly on the console.
我知道我可以使用 OUTPUT_VARIABLE 和 ERROR_VARIABLE 参数捕获输出。但这会在命令运行结束时提供结果。
I know I can capture the output using the OUTPUT_VARIABLE and ERROR_VARIABLE arguments. But, that provides the result at the end of the command run.
根据文档，输出通常应通过
According to the documentation the output should normally be passed through
我在Windows Vista上使用CMake 2.8.3
I am using CMake 2.8.3 on Windows Vista
推荐答案
尝试：
execute_process(COMMAND cmd /c dir)
。 dir是内置的shell命令。 execute_process需要* .exe文件名，因为它是COMMAND之后的第一个参数。 （或者PATH中提供了一些exe文件。）
instead. 'dir' is a built-in shell command. 'execute_process' expects a *.exe file name as it's first argument after COMMAND. (Or some exe available in the PATH.)
实际上，如果您尝试挖掘并找出原始的execute_process调用有什么问题...
In fact, if you try to dig in and find out what's wrong with your original execute_process call...
execute_process(COMMAND dir RESULT_VARIABLE rv)
message("rv='${rv}'")
...您将获得以下输出：
...you'll get this output:
rv='The system cannot find the file specified'
如果将 dir传递给WIN32 CreateProcess调用，几乎可以得到什么。
Which is pretty much what you'd get if you passed "dir" to the WIN32 CreateProcess call.
这篇关于在标准输出上显示EXIRTE_PROCESS输出的命令，例如dir或echo的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！