[Bug libstdc++/60936] [4.9 Regression] Binary code bloat with std::string

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60936

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Alternatively, we could just move the __int_to_char instantiations to a
separate file from the locale facets.