case $opsys in
dnl SIGIO exists, but the feature doesn't work in the way Emacs needs.
dnl See eg <http://article.gmane.org/gmane.os.openbsd.ports/46831>.
- hpux* | irix6-5 | openbsd | sol2* | unixware | gnu-kfreebsd )
+ hpux* | irix6-5 | openbsd | sol2* | unixware )
emacs_broken_SIGIO=yes
;;