[Bug libstdc++/120198] [14/15/16 Regression] std::scoped_lock disabled for non-gthread environments (such as arm-none-eabi)

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120198

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |redi at gcc dot gnu.org
   Last reconfirmed|                            |2025-05-09
     Ever confirmed|0                           |1
   Target Milestone|---                         |14.3
            Summary|std::scoped_lock disabled   |[14/15/16 Regression]
                   |for non-gthread             |std::scoped_lock disabled
                   |environments (such as       |for non-gthread
                   |arm-none-eabi)              |environments (such as
                   |                            |arm-none-eabi)

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this happened with the introduction of bits/version.def which has:

ftms = {
  name = scoped_lock;
  values = {
    v = 201703;
    cxxmin = 17;
    hosted = yes;
    gthread = yes;
  };
};