On 09/09/08 09:35, Stefan Teleman wrote: > > > Steve Clamage wrote: > >> Apache libstdcxx is different -- it must be built for single-threaded >> or MT use. >> >> Let's take the case where we provide only an MT version of the runtime >> library. >> >> I'm not clear on the consequences of linking code compiled without >> -DRE_ENTRANT with MT code. Is that always safe? If so, maybe the only >> issue would be performance. (We don't yet know whether performance is >> an issue.) > > We can force stdcxx into thinking it's always MT, even for those cases > where the user application hasn't passed -mt -D_REENTRANT to the > compiler (by secretly raising _RWSTD_REENTRANT in the internal config.h > file).
That won't help the case of modules that don't include headers from libstdcxx, or that include system headers before including libstdcxx headers. My original question remains: Is it safe to mix .o files compiled with and without -D_REENTRANT ? --- Steve Clamage, stephen.clamage at sun.com
