> Thank you for context. UUID in some way does simplify correct symbols 
> discovery.

>  Does it mean that every time you re-build a binary it gets a new UUID 
> assigned (if it's a part of compilation or linker stage)?


Note that GNU toolchains do the same, it's called build-ID. The actual 
algorithm is implementation-defined, but I think generally includes all content 
so unlike OS X changing debug info etc. will produce a new build-ID. When I 
last looked the gold linker just hashes the whole object.


http://reviews.llvm.org/D7574

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