https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61309
--- Comment #4 from John Marino <gnugcc at marino dot st> --- I suspect the reason it works on FreeBSD is found on libgcc/config.host, specifically the inclusion of t-freebsd in tmake_file definition. t-freebsd for i386 add the symbol map $(srcdir)/config/i386/libgcc-bsd.ver which defines __cpu_model for gcc48 and higher. DragonFly probably needs the same symbol map.
