SVR3.2 development on SVR4

[jeffrey.prem]

   >From: jrh at mustang.dell.com (James Howard)
   >Subject: Re: SVR3.2 development on SVR4
   >Date: 31 Jan 91 14:52:46 GMT
   >Reply-To: jrh at mustang.dell.com (James Howard)
   >
   >In article <1991Jan31.043548.25224 at jwt.UUCP>, john at jwt.UUCP (John
   >Temples) writes:
   >> 
   >> Does anyone know if it is possible to run SVR4 binaries on SVR3.2?
   >> I'd like to get the Dell SVR4 package to develop binaries for ISC
   >> 2.0.2.  Can libraries from SVR3.2 be copied over to SVR4 and used
   >> when linking?
   >> -- 
   >> John W. Temples -- john at jwt.UUCP (uunet!jwt!john)
   >
   >You cannot run binaries made on V4 on a 3.2 system, it does not produce
   >COFF files, uses ELF instead.  The opposite is true however, i.e. 3.2
   >runs okay 
   >on V.4.  If you intend to develop explicitly for 3.2 [ why? ;-) ] then you
   >should do it on a 3.2 machine.

This is not entirely true.  It is possible to develop COFF binaries on
SVR4.0 by installing the SVR3.2 C Compilation System.  It is even
possible to have the SVR4.0 compilation system installed at the same
time.  To accomplish this: install the SVR3.2 CCS *first* (this keeps
the SVR4.0 CCS from making links from "/bin/cc" to "/usr/ccs/bin/cc",
etc.); then install the SVR4.0 CCS.  Since the SVR4.0 CCS resides
under "/usr/ccs", you can control which version you use by where
"/usr/ccs/bin" comes in your $PATH.

This capability is specifically intended for people who want to move
to SVR4.0 while still being able to develop for SVR3.2.

Jeff
-- 
Jeff Prem (jprem at attunix.att.com)
OS Desktop Development Group
UNIX System Laboratories, Inc., A Subsidiary of AT&T