[Bug libstdc++/110574] --enable-cstdio=stdio_pure is incompatible with LFS

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110574

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Doh, I put the wrong PR number in that commit, it's meant to be for PR 104299