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From: jjo@calmasd.UUCP
Newsgroups: comp.unix.questions
Subject: Ultrix FORTRAN <-> C calls
Message-ID: <2274@calmasd.GE.COM>
Date: Fri, 5-Jun-87 17:50:24 EDT
Article-I.D.: calmasd.2274
Posted: Fri Jun  5 17:50:24 1987
Date-Received: Sun, 7-Jun-87 10:34:41 EDT
Reply-To: jjo@calmasd.UUCP (Jay Olson)
Distribution: world
Organization: Calma Company, San Diego
Lines: 16

Can anyone tell me how to call C functions from FORTRAN and vice-versa
using VAX FORTRAN/Ultrix (i.e. fort, as opposed to f77) under Ultrix 1.2.
The documentation I have doesn't seem to include any information about this.

The problem is that FORTRAN entry points and external references are
all uppercase in the object file, while C entry points and external
references are all lowercase (with a preceding underscore), so you end up
with numerous unresolved references at link time (using lk, rather than
ld).

Is it possible that Ultrix 2.0 is required to make interlanguage calls
work?

			- Jay Olson
			...sdcsvax!calmasd!jjo
			jjo@calmasd.GE.COM