[Bug libstdc++/100298] New: noexcept is missing for thread::hardware_concurrency clang refuses the code

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100298

            Bug ID: 100298
           Summary: noexcept is missing for thread::hardware_concurrency
                    clang refuses the code
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: unlvsur at live dot com
  Target Milestone: ---

In file included from In file included from
/home/cqwrteur/myhome/libstdcxx_wasm_build/include/bits/atomic_futex.h:39:
In file included from
/home/cqwrteur/myhome/libstdcxx_wasm_build/include/mutex:47:
In file included from
/home/cqwrteur/myhome/libstdcxx_wasm_build/include/thread:43:
/home/cqwrteur/myhome/libstdcxx_wasm_build/include/bits/std_thread.h:273:31:
error: 'hardware_concurrency' is missing exception specification 'noexcept'
  inline unsigned int thread::hardware_concurrency() { return 0; }
                              ^
/home/cqwrteur/myhome/libstdcxx_wasm_build/include/bits/std_thread.h:196:5:
note: previous declaration is here
    hardware_concurrency() noexcept;
    ^
1 warning and 1 error generated.
1 warning generated.
2 warnings generated.
1 warning and 1 error generated.
4 warnings generated.
make[3]: *** [Makefile:648: future.lo] Error 1
5 warnings generated.
make[3]: *** [Makefile:648: futex.lo] Error 1