[Bug bootstrap/69506] [6 Regression] check-in 232454 seems to cause problems with cygwin builds

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69506

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Jan 29 10:52:08 2016
New Revision: 232974

URL: https://gcc.gnu.org/viewcvs?rev=232974&root=gcc&view=rev
Log:
Fix Cygwin bootstrap error due to TM symbols

        PR libstdc++/69506
        * config/os/newlib/os_defines.h (_GLIBCXX_USE_WEAK_REF): Define.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/config/os/newlib/os_defines.h