Suppose we have a variable message with the value It's a beautiful day!. If we want to use this variable in a makefile command, we need to escape the single quote character (') so that the command is properly interpreted. We can do this using the subst function like so: 复制 escaped_message = $(subst $(squote),'\$(squote)',$(message)) escaped_message would have the value It'\$(squote)s a beautiful day! Did you made a mistake by "It'\$(squote)s a beautiful day!"?
时间: 2024-02-02 16:02:57 浏览: 74
makefile的变量用法
I apologize for the mistake. The correct value of `escaped_message` after the substitution would be `It\'s a beautiful day!`.
So, the command should be:
```
escaped_message = $(subst $(squote),'\$(squote)',$(message))
```
This will replace any instances of the `$(squote)` variable (which is set to a single quote character) in the `message` variable with `'\$(squote)'`, effectively escaping the single quotes.
In this example, `escaped_message` would have the value `It\'s a beautiful day!`. We can then use this variable in a makefile command without any issues.
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