I'm pretty certain that #include <errno.h> is the right way to do it everywhere. You can view, comment on, or merge this pull request online at:
https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/179
-- Commit Summary --
* Update sqUnixExternalPrims.c
-- File Changes --
M platforms/unix/vm/sqUnixExternalPrims.c (6)
-- Patch Links --
https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/179.patch https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/179.diff