Path: utzoo!attcan!uunet!wuarchive!brutus.cs.uiuc.edu!tut.cis.ohio-state.edu!ucbvax!hplabs!hpfcdc!mike
From: mike@hpfcdc.HP.COM (Mike McNelly)
Newsgroups: comp.lang.fortran
Subject: Re: Question about variables local to subroutine
Message-ID: <5140007@hpfcdc.HP.COM>
Date: 23 Aug 89 20:49:39 GMT
References: <24891@iuvax.cs.indiana.edu>
Organization: HP Ft. Collins, Co.
Lines: 13

If the compiler supports recursion (not in standard FORTRAN 77), it is
unlikely that you can count on implicit value saving from one subprogram
invocation to the next.  Many (most?)  implementations that support
recursion use a separate stack frame for each function activation.
Sometimes these stack frames align from one invocation to the next but
there's certainly no guarantee that this will always be the case.

If you need to save values use the standard SAVE statement.  It will
save you considerable grief should you ever port your program to a new
architecture.

Mike McNelly
mike%hpfcla@hplabs.hp.com