Path: utzoo!attcan!uunet!ingr!b11!doyle
From: doyle@b11.ingr.com (Doyle Davidson)
Newsgroups: comp.windows.x
Subject: Shared Libraries and Patches
Message-ID: <8874@b11.ingr.com>
Date: 1 Oct 90 20:04:09 GMT
Organization: Intergraph Corp. Huntsville, AL
Lines: 31

YAGNBD:  "Yet Another Good News/Bad News" story:

I just installed fixes 15-17 onto our system  (Intergraph CLIX - System V 
with BSD extensions) and lo and behold, the new shread libraries that
I just built core dump when run against older (MIT fix level 14) 
clients.  A little examination reveals some changes in various data
structures reveals that things like "XtAppStruct" have changed.

What I am wondering is do other vendor's shared libraries have
version compatibility problems when public data structures change
or is it just us poor System V (Intergraph's implementation??) souls?

The reason this is really important is that we must now support (at least)
two versions of the shared target (runtime: patches 1-14 and 1-17)
and wean all of our internal and third party application groups off of the 
older shared library which seems to defeat one of the major advantages of 
shared libraries (code updates with re-linking).

Any comments/"nyah-nyah, my way is better :-P"/why aren't you doing so-and-so?

Doyle (Is this is old me or the new me?) Davidson
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Doyle C. Davidson              |
Intergraph Corp.               |  These comments are...
Workstation Graphics Standards |
1 Madison Industrial Park      |
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