运行并行make时出错 [英] Error while runing parallel make

问题描述

请考虑以下make：

all: a b

a:
        echo a
        exit 1


b:
        echo b start
        sleep 1
        echo b end

当运行它 make -j2 时，我收到以下输出：

While running it as make -j2 I receive the following output:

echo a
echo b start
a
exit 1
b start
sleep 1
make: *** [a] Error 1
make: *** Waiting for unfinished jobs....
echo b end
b end

我们有一个很大的make文件，很容易错过错误，因为在执行结束时没有错误信息。

We have quite a big make file and it's easy to miss error, since there's no error message at the end of execution.

是否有错误消息出现的方法只是在结束的执行？

Is there a way for error message to appear also just in the end of the make execution?

UPDATE：

查看我可能的

See my possible solution how to check make exit status from within make.

推荐答案

如果任何程序被调用， code> make 返回一个错误， make 的返回码不会为零。因此，在调用 make 之后，您只需检查返回代码以查看是否发生错误。在 bash （以及许多其他shell如 zsh ），您可以执行以下操作：

If any program called by make returns with an error, the return code of make will not be zero. So after calling make you could just check the return code to see if an error occurred. On bash (and many other shells like zsh) you could do the following:

# make
....
# echo $?

echo将打印 0

您还可以从shell脚本中运行检查：

You could also run the check from inside a shell script:

make
if [ $? -eq 0 ]; then
    echo "Everything OK"
else
    echo "Something went wrong!"
fi

如果您需要确切的错误消息，最简单的方法是重定向输出 make 到某个文件， grep 则执行失败。

If you need the exact error message the easiest way is to redirect the output from make to some file and grep for the error if execution failed.

但是我通常这样做是并行运行 make ，并用 -j1 如果出错了，我会得到一个干净的错误信息。我想这可以放入一个shell脚本使用上面的技术。

But the way I usually do this is to run make in parallel and re-execute it with -j1 if something went wrong so I will get a clean error message. I guess this could be put into a shell script using the technique above.

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