[Bug libstdc++/86843] Allow separating debug mode into ABI-changing part and rest

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86843

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-08-03
     Ever confirmed|0                           |1
           Severity|normal                      |enhancement

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
So retain all the debug checks in algorithms and in basic_string, but don't
replace std::vector with __gnu_debug::vector and so on. Seems like a good idea.