As mentioned in the readme crystal uses some functions of the M2POSIX
library which is now a part of the M2LIB 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

XSample.M2: void,ptr,SIGTERM,SIGINT,SIGQUIT,SignalHandler,sigsetT,
            sigaction,SaFlags,SigactionRec,sigemptyset
