[Bug libstdc++/69310] [6 Regression] Revision r232454 breaks bootstrap on x86_64-apple-darwin15

[torvald at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69310

--- Comment #14 from torvald at gcc dot gnu.org ---
Author: torvald
Date: Wed Jan 20 17:47:03 2016
New Revision: 232628

URL: https://gcc.gnu.org/viewcvs?rev=232628&root=gcc&view=rev
Log:
libstdc++: Darwin does not support weak refs without definition.

        PR libstdc++/69310
        * config/os/bsd/darwin/os_defines.h (_GLIBCXX_USE_WEAK_REF): Define.

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