work on OpenBSD, and exceptions are hevaily used by OpenOffice.Org.
Backport PR libstdc++/31481 from GCC repository because this fix is needed
by openoffice:
PR libstdc++/31481
* include/ext/type_traits.h (__numeric_traits): Move...
* include/ext/numeric_traits.h: ... here; fix type of
__max_digits10.
* include/ext/pb_ds/detail/type_utils.hpp: Include
<ext/numeric_traits.h> too.
* include/tr1/random: Likewise.
Tested with both openoffice and webkit. bump needed PKGNAMEs;