[PATCH] [compiler-rt] Turn abort_on_error=1 by default on OS X (part 1/2)

[Kostya Serebryany]

In http://reviews.llvm.org/D7203#138655, @glider wrote:

> I don't like the idea of linking extra objects ultimately for every user.
>  If the user wants to set his own defaults there'll be two versions of
>  __asan_default_options.


Agree.
Exactly for this reason I proposed __asan_default_abort_on_error. Which is not perfect too. 
Anyway, Anna agreed to wait with this patch for some time, maybe the requirements (either her or ours) will become clearer or will change.


http://reviews.llvm.org/D7203

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