From: utzoo!decvax!cca!dan@Bbn-Unix@sri-unix
Newsgroups: net.unix-wizards
Title: Re: Library functions with non-integer return types
Article-I.D.: sri-unix.3343
Posted: Sat Sep 18 01:53:52 1982
Received: Wed Sep 22 10:40:13 1982

From: Dan Franklin 
Date: 15 Sep 1982 13:18:00 EDT (Wednesday)
Regardless of what most aassemblers and loaders may do,
many C compilers (including 4.1 BSD and the Ritchie
compilers) do not generate .globls if you declare, but
do not reference, an external function.  So just because
stdio.h declares fopen, freopen, fdopen, ftell, and fgets
doesn't mean that all those routines are included in your
object files.