[Bug libstdc++/51181] [4.7 regression] libstdc++.so __sync_sub_and_fetch_4 linkage error causing many test suite failures on m68k-linux

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51181

--- Comment #7 from Richard Henderson <rth at gcc dot gnu.org> 2011-11-18 
01:38:53 UTC ---
Author: rth
Date: Fri Nov 18 01:38:48 2011
New Revision: 181465

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181465
Log:
PR libstdc++/51181
        * libsupc++/eh_tm.cc (free_any_cxa_exception): Protect the use
        of __sync_sub_and_fetch with _GLIBCXX_ATOMIC_BUILTINS_4.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/libsupc++/eh_tm.cc