Possible 3.4.2 showstopper: PR 17325

[Aaron W. LaFramboise]

Mark Mitchell wrote:
> I have just been made aware of PR 17325, a failure to bootstrap on 
> Cygwin due to a problem with a libstdc++ backport to the 3.4 branch.

Sorry: maybe I should have been more clear in the bug report, but this
is only a major problem for i*86-pc-mingw.  I beleive Cygwin uses POSIX
threads by default, not Win32 threads, so I don't think this will affect
normal Cygwin builds (but it would if the builder selected
--enable-threads=win32).

Aaron W. LaFramboise