如何检查Makefile Shell调用的退出状态? [英] How do I check the exit status of a Makefile shell invocation?

问题描述

我有一个Makefile，它运行一个程序，成功时返回一个非零值，失败时返回另一个非零值.我知道我可以通过在命令前面加上-来忽略退出状态，但这是行不通的，因为我需要知道命令是否成功.

I have a Makefile which runs a program which on success return a non-zero value, and on failure return another non-zero value. I know that I can ignore the exit status by prefixing the command with -, but that does not work because I need to know if the command succeeded.

推荐答案

您可以使用包含最后返回值的shell $?变量，在同一Makefile行上的第二条命令上测试返回值.

You can test the returned value on a second command on the same Makefile line, using the shell $? variable that contains the last returned value.

例如，使用false命令显然会停止编译:

For example with the false command that would obviously stop the compilation:

test:
    /bin/false ; /usr/bin/test "$$?" -eq 1     # <-- make does not stop here
    /bin/echo "Continues ..."
    /bin/false                                 # <-- make stops here

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