http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52189
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-02-10 11:25:35 UTC --- This change: --- baseline_symbols.txt 2012-01-23 19:01:03.590486000 +0100 +++ baseline_symbols.txt.s8g 2012-01-23 19:03:38.063402000 +0100 @@ -2176,0 +2177 @@ +FUNC:_ZSt16__get_once_mutexv@@GLIBCXX_3.4.12 @@ -2209,0 +2211 @@ +FUNC:_ZSt23__get_once_functor_lockv@@GLIBCXX_3.4.11 @@ -2212,0 +2215 @@ +FUNC:_ZSt27__set_once_functor_lock_ptrPSt11unique_lockISt5mutexE@@GLIBCXX_3.4.12 @@ -2649,0 +2653 @@ +OBJECT:16:_ZSt14__once_functor@@GLIBCXX_3.4.11 @@ -2715,2 +2718,0 @@ -OBJECT:16:__emutls_v._ZSt11__once_call@@GLIBCXX_3.4.15 -OBJECT:16:__emutls_v._ZSt15__once_callable@@GLIBCXX_3.4.15 indicates that it was previously using TLS and now isn't (as discussed in PR 52104) so that's what should be fixed to bring the __once_call* symbols back
