[Bug bootstrap/72844] Revision 293175 breaks gcc on FreeBSD

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72844

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Created attachment 39081
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39081&action=edit
Ensure that HAVE_ICONV is usable as a conditional