[Bug libstdc++/59894] Force use of the default new/delete

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59894

--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #0)
> PR 59893 considers a different path using LTO to inline at link time the
> definition from libsupc++.

Note that doing both at the same time:
1) provide an inline version of new
2) LTO-link with libsupc++
might interact badly (or not, I haven't checked). We should test it and if
needed warn about it in the documentation or preferably find a workaround.