Pavel Labath efd57a8aec Revert "[Support] Add RetryAfterSignal helper function" and subsequent fix ...

The fix in r306003 uncovered a pretty fundamental problem that libc++
implementation of std::result_of does not handle the prototype of
open(2) correctly (presumably because it contains ...). This makes the
whole function unusable in its current form, so I am also reverting the
original commit (r305892), which introduced the function, at least until
I figure out a way to solve the libc++ issue.

llvm-svn: 306005

2017-06-22 14:18:55 +00:00

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