Tested powerpc64le-linux, pushed to trunk.
In r12-3860 the error categories in were made final and
immortal, but I missed the categories for and . This makes
the same changes to those.
libstdc++-v3/ChangeLog:
* src/c++11/cxx11-ios_failure.cc (io_error_category): Define
class a
This ensures that the objects returned by std::generic_category() and
std::system_category() are initialized before any code starts executing,
and are not destroyed at the end of the program. This means it is always
safe to access them, even during startup and termination. See LWG 2992
and P1195R0
