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From: dcb@dave.mis.semi.harris.com (Dave Brillhart)
Newsgroups: comp.unix.ultrix
Subject: Compilation Warnings for 'S' on a DECstation 5000
Message-ID: <1991Jan23.155751.10563@mlb.semi.harris.com>
Date: 23 Jan 91 15:57:51 GMT
Sender: news@mlb.semi.harris.com
Reply-To: dcb@dave.mis.semi.harris.com (Dave Brillhart)
Organization: Harris Semiconductor, Melbourne, FL
Lines: 34
Nntp-Posting-Host: dave.mis.semi.harris.com

I am trying to compile 'S' on a DECstation 5000.  I haven't received my
loaner F77 compiler yet, so I am just trying to compile the C-only
subset of S. AT&T recommends doing this to check out a machine
for compatibility.

I am using the standard cc compiler that comes with ULTRIX V4.1.
There are a few warnings I get using the built-in 'signal' function. Any
help eliminating these would be greatly appreciated. Here are the specifics:

In the standard include file (/usr/sys/h/signal.h) the following is defined:
       #define SIG_IGN         ((void (*)())( 1))

In the source module that generates a compile warning, the following
  code exists:
         osig = signal(SIGINT, SIG_IGN);
 
Here is the compilation warning that is produced:  
        cc -c -I$I -O2 -Olimit 2000  Spost.c
        ccom: Warning: Spost.c, line 76: illegal pointer combination
                                      osig = signal(    2     ,      
((void (*)())( 1)));
        ------------------------------------------------^

In the man pages for signal, the following syntax is specified:
        #include <signal.h>
        (*signal(sig, func))()
        void (*func)();
 
Any ideas or suggestions (should I just ignor these messages)?

-- Dave Brillhart
     Harris Semiconductor
      (407) 729-5430
      dcb@dave.mis.semi.harris.com