http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52839
Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
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Target Milestone|4.7.1 |---
--- Comment #22 from Alan Modra <amodra at gmail dot com> 2012-04-10 23:53:16
UTC ---
Regarding the ABI change, would I be correct to say that the ABI was broken for
powerpc by
2012-02-10 Benjamin Kosnik <[email protected]>
Jonathan Wakely <[email protected]>
since that particular patch introduced the dependency on having long long
atomics? If I understand correctly, before that change code would use sync
builtins on powerpc throughout. So code compiled before that date won't behave
correctly using a current libstdc++.so, which now uses mutexes.
I'm not trying to apportion blame, just pointing out that making libstdc++ use
atomics on powerpc *fixes* an ABI breakage for the great majority of cases.
