[PATCH] [compiler-rt] Symbolizer refactoring: Unify access to symbolizer tools from POSIXSymbolizer

[Alexey Samsonov]

I'm happy with the direction of this change, although:

Note that this does introduce a change in behavior - in case both libbacktrace *and* external symbolizer are available, we could fallback from former to latter. Is there a strong reason for removing this fallback? I originally thought that it can be useful in symbolizers you were going to add.


http://reviews.llvm.org/D8029

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