[Bug libstdc++/123326] [16 Regression] Bootstrap broken on FreeBSD by r16-6038

[kargl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123326

--- Comment #10 from Steve Kargl <kargl at gcc dot gnu.org> ---
Created attachment 63179
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63179&action=edit
Output with -Wl,-M

Not sure I put '-Wl,-M' in the correct spot.  The attached file
is obtained from

% gmake bootstrap |& tee output_-Wl,-M.txt

I'll note that bootstrap fails with gcc-15.2.1 installed
from FreeBSD's ports.  It fails with gcc-15.x built from
top of the branch.  It fails with a freshly built gcc-16
top-of-tree.  The irony here is that the gcc-16 top-of-tree
was bootstrapped with FreeBSD's cc and cc++ (aka clang).