arm64 has a prototype: /usr/include/machine/ieeefp.h:extern fp_except_t fpsetmask(fp_except_t); but it is not implemented - e.g., when building the perl port: ===> Building for perl5-5.20.2_4 cc -lpthread -Wl,-E -fstack-protector -L/usr/local/lib -o miniperl perlmini.o opmini.o miniperlmain.o gv.o toke.o perly.o pad.o regcomp.o dump.o util.o mg.o reentr.o mro.o keywords.o hv.o av.o run.o pp_hot.o sv.o pp.o scope.o pp_ctl.o pp_sys.o doop.o doio.o regexec.o utf8.o taint.o deb.o universal.o globals.o perlio.o perlapi.o numeric.o mathoms.o locale.o pp_pack.o pp_sort.o caretx.o -lm -lcrypt -lutil perlmini.o: In function `Perl_sys_init': perlmini.c:(.text+0xc): undefined reference to `fpsetmask' perlmini.o: In function `Perl_sys_init3': perlmini.c:(.text+0x58): undefined reference to `fpsetmask' cc: error: linker command failed with exit code 1 (use -v to see invocation) *** [lib/buildcustomize.pl] Error code 1 make[3]: stopped in /usr/ports/lang/perl5.20/work/perl-5.20.2 1 error make[3]: stopped in /usr/ports/lang/perl5.20/work/perl-5.20.2
Fixed in base r284769