[Bug libstdc++/92927] Bootstrap failed with CXXFLAGS="-O0"

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92927

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Dec 20 17:10:18 2019
New Revision: 279656

URL: https://gcc.gnu.org/viewcvs?rev=279656&root=gcc&view=rev
Log:
libstdc++: Add inline to maybe-constexpr functions (PR 92927)

Originally these functions were always inline. I changed them in r277342
to be always constexpr, then in r277588 changed them to be constexpr for
C++14, but I didn't restore the 'inline' for C++11. That leads to linker
errors when libstdc++.so is built unoptimized, because those functions
don't get instantiated in src/c++11/string-inst.o

        PR libstdc++/92927
        * include/bits/alloc_traits.h (__alloc_on_copy, __alloc_on_move)
        (__alloc_on_swap): Add inline specifier.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/alloc_traits.h