PR 13631 Problems in messages

[Jonathan Wakely]

On 18/03/15 16:17 +0000, Jonathan Wakely wrote:
>The new get_glibc_msg function doesn't compile with old versions of
>glibc, _M_name_messages is not defined (the code is also not exception
>safe, but that was not introduced by the recent changes).

We can probably drop that old code completely, given that we document
that glibc 2.3 is required:
https://gcc.gnu.org/onlinedocs/libstdc++/manual/setup.html#manual.intro.setup.prereq

Let's look into that for GCC 6.