[Bug libstdc++/87587] [...]/libstdc++-v3/src/c++11/cxx11-shim_facets.cc:271:28: error: empty class 'std::integral_constant' parameter passing ABI changes in -fabi-version=12 (GCC 8) [-Werror=abi]

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87587

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. I'm pretty sure before r262824 it still failed, but with a different
warning about -Wabi not doing anything.