Recent libstdc++ regression on i686-linux: abi/cxx_runtime_only_linkage.cc

[Paolo Carlini]

Paolo Carlini wrote:
> I'm going to revert again the whole thing and wait for a different, 
> safe, approach, sorry.
In the short time frame, i.e., something solid for 4.4.0, I would 
suggest two possible strategies:

1- Try to re-organize the new code in order to make possible using in 
*few* selected places _GLIBCXX_ATOMIC_BUILTINS_4 to enable / disable the 
new feature completely.

2- Learn from guard.cc. In that libsupc++ implementation file, 
*certainly* atomic builtins are safely used, with fall-backs.

Paolo.