Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!amdcad!ames!ucbcad!pasteur!ucbvax!husc6!rutgers!topaz.rutgers.edu!mccarrol
From: mccarrol@topaz.rutgers.edu (<MC>)
Newsgroups: comp.lang.c
Subject: extern
Message-ID: <17428@topaz.rutgers.edu>
Date: 18 Jan 88 00:17:34 GMT
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 23
Keywords: extern qualifier

I have a couple of questions concerning the extern qualifier in C.

First: Is it possible to put an external declaration outside the body
of any function? I'm writing a large program in several separate
modules, and I'd like to have a listing at the beginning of each file
of what external variables are used in the file. Can extern be used
this way? 

Second: I know that my compiler doesn't complain against extern's
outside of function bodies, but I'm not sure if it does what I want.
Is the compiler allocating space for these variables, or is it just
identifying thier names as a reference to something from another
source file, to be resolved at link-time?

	Just in case it matters ( although I doubt it; this MUST be
standardized, right?) I'm using Lattice C 3.10 on an Amiga.

		<MC>
-- 
"It is a principle of the music/to repeat the theme |Mark C. Carroll
Repeat/and repeat again/as the pace mounts.  /------/Rutgers U CS Student
The theme/is difficult/but no more difficult |ARPA  :CARROLL@AIM.RUTGERS.EDU
than the facts to be/resolved"-WC Williams   |Usenet:mccarrol@topaz.rutgers.edu