Newsgroups: comp.unix.aix
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!batcomputer!theory.tn.cornell.edu!kakazu
From: kakazu@theory.tn.cornell.edu (Gary Kakazu)
Subject: C + FORTRAN + getenv() (Was: NCAR running under AIX 3.1 update 3003)
Message-ID: <1991Apr17.192557.5133@batcomputer.tn.cornell.edu>
Originator: kakazu@theory.tn.cornell.edu
Sender: news@batcomputer.tn.cornell.edu
Nntp-Posting-Host: theory.tn.cornell.edu
Organization: Cornell Theory Center
Date: Wed, 17 Apr 1991 19:25:57 GMT

Last week I asked about running NCARG under AIX 3.1 update 3003.  I
heard that there were some troubles running ncarg under 3003.  Some
of the responses I got said that it would run, and some said wouldn't.
I decided to try it myself and found the following problem.

It appears that if a Fortran program calls a C program, and the C
program calls the routine getenv, the program crashes.  If I comment
out getenv in the routines that call it, and pass the GRAPHCAP & FONTCAP
info on the command line, the example program works fine.

If you just have a C program that calls getenv, it works fine.

I have written an example of a C & Fortran program that illustrates
the problem.  If anyone knows of a way around this, let me know.

Thanks.


----------The Makefile-----------------
COBJS = test1.o
FOBJS = test1f.o
FFLAGS = -g

test1: $(COBJS) $(FOBJS)
        xlf $(FFLAGS) -o test1 $(COBJS) $(FOBJS)

--------Call me test1f.f---------------------
        call c_routine( )
        stop
        end

--------Call me test1.c-----------------
c_routine( )
{
        char *ptr;
        printf("Before getenv\n");
        ptr = getenv( "PWD" );
        printf("ptr is: %s\n",ptr);
}