[Bug libstdc++/31117] c++locale.o thread-unsafe in libstdc++

[pcarlini at suse dot de]

------- Comment #22 from pcarlini at suse dot de  2007-03-15 19:17 -------
(In reply to comment #21)
> (In reply to comment #17)
> > Why? 
> 
> OK, now I know why. Reason is that os_defines.h is included after errno.h.

Oh yes, you are totally right. The problem is that <cerrno> is one of the very
few c headers not including <bits/c++config.h> first. We can easily fix that.

> I also now know why basic_file.cc gets the errno function:
> /usr/include/sys/feature_tests.h defines _POSIX_C_SOURCE to 199506L,

Ok, but on other targets I don't think we can trust locale.h to always include
something similar and enable the thread safe errno.

Thus, my preference goes for the plan of adding that define in os_defines.h (+
adjusting <cerrno> of course). Are you positive about figuring out something
similar to _TS_ERRNO for the other targets?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31117