https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113398
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
In file included from /home/jwakely/gcc/13/include/c++/13.2.1/string:38,
from free.cc:1:
/home/jwakely/gcc/13/include/c++/13.2.1/bits/requires_hosted.h:34:4: error:
#error "This header is not available in freestanding mode."
34 | # error "This header is not available in freestanding mode."
| ^~~~~
