As mentioned in the readme crystal uses functions of the M2POSIX library at
the following places:

MenuMgr.Mod: ProcessDomain
ScrpMgr.Mod: DIRSEP,PathName,access,fOK,unlink,SLEN,APPEND,CONCAT
VControl.Mod: GetCookie
ApplTool.Mod: GetCookie,CookieVal,PrefLanguage,Language