[PATCH] D15225: [Driver] Sanitizer support based on runtime library presence

[Anna Zaks via cfe-commits]

zaks.anna added a comment.

> I see, so essentially you want to use a different approach for determining sanitizer availability (on OS X for now): if the library is present, then we support 

>  sanitizer, otherwise we don't: i.e. the binary distribution is the source of truth, not the list of sanitizers hardcoded into Clang driver source code. I'm fine with 

>  that, and see why it would make sense.


Correct.

> It's just that error message looks misleading: the problem is not TSan is unsupported for target, it's just unavailable in this distribution for one reason or 

>  another.


The main advantage of the error message Kuba has right now is that it is user friendly. A sanitizer IS unsupported for the given target in the given distribution if the library is missing. Saying something along the lines of "runtime components for '-fsanitize=thread' not available" is vague. For example, does it mean that the user needs to install the runtime components in some other way?


http://reviews.llvm.org/D15225