samba - Jan 1998 - Compile on Interactive Unix 4.1

Can someone help me out compiling 1.9.18 for  ISC UNIX rel. 4.1. ?

Compile message:
 "./smb.h", line 1590: syntax error
 "./smb.h", line 1590: warning: syntax requires ; at end of
struct/union decl
 "./smb.h", line 1599: zero sized structure
 "./smb.h", line 1604: syntax error
 "./smb.h", line 1604: warning: syntax requires ; at end of
struct/union decl
 "./smb.h", line 1614: zero sized structure


Last compiled version I have is Samba 1.9.15p5.


Ivan Kuncl (vsbohem@mbox.vol.cz)