aaron.ballman added a comment.

In https://reviews.llvm.org/D33788#771671, @bruno wrote:

> > I'm unaware of any other API that canonicalizes the path, which is what 
> > users of this API are going to expect.
>
> You can also call `sys::path::remove_dots(Path, /*remove_dot_dot=*/true);`


Yes, but that does not canonicalize the path. For instance, it won't handle 
doubled-up slashes or symlinks.

Ultimately, the value returned from this API gets passed to POSIX functions 
which expect a canonical path. I don't think `remove_dots()` is sufficient. It 
should do the same thing as `getMainExecutable()`, I believe.

> 
> 
>> There's already a test case that covers this: Index/pch-from-libclang.c -- 
>> it was failing on OS X 10.6 for us. If you have a better test case in mind, 
>> I can certainly add it.
> 
> Works for me.




https://reviews.llvm.org/D33788



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