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Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!teddy!panda!talcott!harvard!seismo!brl-tgr!tgr!gwyn@Brl-Vld.ARPA
From: Doug Gwyn (VLD/VMB) 
Newsgroups: net.unix-wizards
Subject: Re:  \"ld\" and \".a\" files
Message-ID: <7337@brl-tgr.ARPA>
Date: Mon, 14-Jan-85 22:45:37 EST
Article-I.D.: brl-tgr.7337
Posted: Mon Jan 14 22:45:37 1985
Date-Received: Sun, 20-Jan-85 04:41:49 EST
Sender: news@brl-tgr.ARPA
Organization: Ballistic Research Lab
Lines: 3

The entire whatever.o file is linked in, whether from an archive
or by itself.  This is by design and is indeed necessary for C
programs.