Path: utzoo!utgpu!watmath!uunet!tut.cis.ohio-state.edu!MIZAR.DOCS.UU.SE!victor
From: victor@MIZAR.DOCS.UU.SE (Bjorn Victor)
Newsgroups: gnu.gcc.bug
Subject: inet_makeaddr returns 0
Message-ID: <8911131302.AA13658@mizar.DoCS.UU.SE>
Date: 13 Nov 89 13:02:08 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 47

Environment:
    Sun 4/260 running SunOS 4.0.1
    "gcc version 1.36"
    "GNU CPP version 1.36"
    "GNU C version 1.36 (sparc) compiled by CC."
    "Gnu assembler version 1.34 (I guess.)"
    (unknown version of GNU loader)

Give the following program (an extract from the original):
    #include <stdio.h>
    #include <sys/types.h>
    #include <netinet/in.h>
    #include <arpa/inet.h>

    main(argc,argv)
	 int argc;
	 char *argv[];
    {
      struct in_addr naddr;
      int net;
      char *string;

      net = atoi(argv[1]);
      naddr = inet_makeaddr(net,0);
      printf("Net = %d, Netaddr = %lu\n",net,naddr.s_addr);
      string = inet_ntoa(&naddr);
      printf("Or rather: %s\n", string);
    }

When compiled with Sun's /bin/cc, the program runs OK (net = 10 gives
naddr.s_addr = 167772160).

When compiled with gcc, the call to inet_makeaddr() always returns 0,
which is incorrect.  Using the -fpcc-struct-return option doesn't make
it work.

With gcc version 1.35 on a Sun 3/60 running the same OS, the program works.

If I compile the BSD4.3 definition of inet_makeaddr with gcc, the
combination works, but I can't recompile the system with gcc...

Please aid me, since I'd really love to use gcc for all C code I write!

Yours,
-- Bjorn Victor			victor@DoCS.UU.SE
Dept. of Computer Systems    or victor%DoCS.UU.SE@uunet.UU.NET
Uppsala University, Sweden	"I'd rather hack a Lisp Machine!"