CMake忽略自定义目标的回报 [英] CMake ignore return on custom target

问题描述

我已将此自定义目标添加到我的 CMakeList.txt 文件中。

I have added this custom target to my CMakeList.txt file.

系统：Windows 7，TDMGCC MinGW32和Ninja是GitHub上的最新版本。

System: Windows 7, TDMGCC MinGW32, and Ninja latest from GitHub.

ADD_CUSTOM_TARGET(unittest_run
    COMMAND test1.exe > result.testresult
    COMMAND test2.exe >> result.testresult
    COMMAND type result.testresult
)

问题是，当 test1.exe 失败时，我会生成失败输出，但似乎还会出现一些错误代码，这会导致问题。 忍者：构建停止：子命令失败。

The problem is that when test1.exe fails I generate a fail output, but it seems that there is also some error code coming which causes a problem. ninja: build stopped: subcommand failed.

我如何告诉CMake应该忽略返回错误？

How can I tell CMake it should ignore return errors?

推荐答案

您可以尝试使用条件OR语句，该条件OR语句仅在前面的语句失败时才运行，并从中生成成功的返回码次要声明

You can try use a conditional OR statement, which will be run only if the preceding statement fails, and generate a successful return code from the secondary statement

来自此页面 ;有条件的执行如果第一个失败，则可以使用 ||| 有条件地执行第二条语句

From this page on "Conditional Execution" you can use || to conditionally execute a secondary statement if the first fails

仅在以下情况下执行command2 command1失败（或）

Execute command2 only if command1 fails (OR)

    command1 || command2

来自此SO答案可以使用（出口0）

生成成功的返回码

true 大致等效于（退出0）（括号中会创建一个退出的子外壳状态为0，而不是退出当前shell。

true is roughly equivalent to (exit 0) (the parentheses create a subshell that exits with status 0, instead of exiting your current shell.

将它们放在一起：

ADD_CUSTOM_TARGET(unittest_run
    COMMAND test1.exe > result.testresult  || (exit 0)
    COMMAND test2.exe >> result.testresult || (exit 0)
    COMMAND type result.testresult
)

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