GNU bug report logs - #7643
Build failure for SGI IRIX MIPS

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Build failure for SGI IRIX MIPS
Date: Wed, 15 Dec 2010 09:41:20 +0800

Nelson H. F. Beebe reports a build failure of the 23.2.92 pretest on SGI
IRIX MIPS.

The last Emacs version to build ok was 21.3 in January 2004, so this
appears to be a long-standing bug.

> On IRIX, compilation fails in src/process.c like this:
>
> 	cc-1367 c89: ERROR File = process.c, Line = 2431
> 	  A pointer to an incomplete class type is not allowed.
>
> 		uint16_t *ip6 = (uint16_t *) &sin6->sin6_addr;
> 					      ^
>
> 	cc-1367 c89: ERROR File = process.c, Line = 2432
> 	  A pointer to an incomplete class type is not allowed.
>
> 		len = sizeof (sin6->sin6_addr)/2 + 1;
> 			      ^
>
> 	cc-1367 c89: ERROR File = process.c, Line = 2435
> 	  A pointer to an incomplete class type is not allowed.
>
> 		p->contents[--len] = make_number (ntohs (sin6->sin6_port));
> 									 ^
>
> 	cc-1070 c89: ERROR File = process.c, Line = 2489
> 	  The indicated type is incomplete.
>
> 		  return sizeof (struct sockaddr_in6);
> 				 ^
>
> 	cc-1367 c89: ERROR File = process.c, Line = 2546
> 	  A pointer to an incomplete class type is not allowed.
>
> 		  uint16_t *ip6 = (uint16_t *)&sin6->sin6_addr;
> 					       ^
>
> 	cc-1367 c89: ERROR File = process.c, Line = 2547
> 	  A pointer to an incomplete class type is not allowed.
>
> 		  len = sizeof (sin6->sin6_addr) + 1;
> 				^
>
> 	cc-1367 c89: ERROR File = process.c, Line = 2549
> 	  A pointer to an incomplete class type is not allowed.
>
> 		  sin6->sin6_port = htons (i);
> 		  ^
>
> 	cc-1070 c89: ERROR File = process.c, Line = 4388
> 	  The indicated type is incomplete.
>
> 	      struct sockaddr_in6 in6;
> 				  ^
>
> 	8 errors detected in the compilation of "process.c".

Message #8 received at 7643 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: "Nelson H. F. Beebe" <beebe <at> math.utah.edu>
Cc: 7643 <at> debbugs.gnu.org
Subject: Re: bug#7643: Build failure for SGI IRIX MIPS
Date: Sat, 08 Jan 2011 15:43:06 -0500

> cc-1367 c89: ERROR File = process.c, Line = 2431
>   A pointer to an incomplete class type is not allowed.
>
>         uint16_t *ip6 = (uint16_t *) &sin6->sin6_addr;
> ...
> cc-1367 c89: ERROR File = process.c, Line = 2435
>   A pointer to an incomplete class type is not allowed.
>
>         p->contents[--len] = make_number (ntohs (sin6->sin6_port));

This is a bit of a long shot, but could you check if this maching has
uint16_t defined?

Also, what is the definition of sockaddr_in6 in netinet/in.h and the
definition of ntohs in arpa/inet.h?  On GNU/Linux, they are

struct sockaddr_in6
  {
    __SOCKADDR_COMMON (sin6_);
    in_port_t sin6_port;	/* Transport layer port # */
    uint32_t sin6_flowinfo;	/* IPv6 flow information */
    struct in6_addr sin6_addr;	/* IPv6 address */
    uint32_t sin6_scope_id;	/* IPv6 scope-id */
  };

uint16_t ntohs(uint16_t netshort);

but maybe they are defined differently in IRIX.

Message #11 received at 7643 <at> debbugs.gnu.org (full text, mbox):

From: Rainer Orth <ro <at> CeBiTec.Uni-Bielefeld.DE>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 7643 <at> debbugs.gnu.org
Subject: Re: bug#9684: Emacs 23.3 and 24.0.90 don't build on IRIX 6.5
Date: Fri, 07 Oct 2011 11:20:56 +0200

[Cc'ing to the correct bug.]

Glenn Morris <rgm <at> gnu.org> writes:

> If you have an SGI IRIX, maybe you could help out with
> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=7643 ?
>
> The original submitter never replied.

I can at least try...

> Though presumably you don't see that problem since the C build completed
> for you (also I'm not sure if you are using the same kind of system).

I fear that's exactly the problem: IPv6 support was only added in a
later update of IRIX 6.5 (don't recall exactly which one), so without
knowing what Nelson is (was) running, it's hard to tell.  Maybe emacs
assumes IPv6 support unconditionally (or the test was insufficient)?

I did have various problems building 23.3 on 6.5.30 myself, but nothing
related to IPv6.  I didn't try with cc, though.

	Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University

Message #14 received at 7643 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Rainer Orth <ro <at> CeBiTec.Uni-Bielefeld.DE>
Cc: 7643 <at> debbugs.gnu.org
Subject: Re: bug#7643: Build failure for SGI IRIX MIPS
Date: Fri, 07 Oct 2011 14:48:19 -0400

Rainer Orth wrote:

> I fear that's exactly the problem: IPv6 support was only added in a
> later update of IRIX 6.5 (don't recall exactly which one), so without
> knowing what Nelson is (was) running, it's hard to tell.  Maybe emacs
> assumes IPv6 support unconditionally (or the test was insufficient)?

Thanks for looking at this.

However, all the relevant places in process.c seems to be inside #ifdef
AF_INET6, where AF_INET6 is defined by the system headers, not by Emacs.
So if IPv6 support is not present these sections should never be seen.

Message #17 received at 7643 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 7643 <at> debbugs.gnu.org
Cc: Rainer Orth <ro <at> CeBiTec.Uni-Bielefeld.DE>
Subject: Re: bug#7643: Build failure for SGI IRIX MIPS
Date: Fri, 07 Oct 2011 15:18:59 -0400

Web search suggests maybe some IRIXs need -DINET6?

http://www.mail-archive.com/openpkg-users <at> openpkg.org/msg02606.html

Message #24 received at 7643-done <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 7643-done <at> debbugs.gnu.org
Subject: Re: bug#7643: Build failure for SGI IRIX MIPS
Date: Mon, 10 Oct 2011 13:54:30 -0400

I am afraid that without more input from you or someone else using IRIX
who can reproduce this, nothing can be done.

At a guess, maybe you need to compile with -DINET6, in which case a
patch like the following might fix it. But I don't see the point in
installing this without any testing.

If you can reply with the contents of netinet/in.h on your system, that
might help, and we can reopen this if needed.

*** src/process.c	2011-09-09 01:06:52 +0000
--- src/process.c	2011-10-07 21:42:30 +0000
***************
*** 39,44 ****
--- 39,51 ----
  
  #include <sys/socket.h>
  #include <netdb.h>
+ 
+ /* Some (which?) IRIX 6.5 hide IPv6 stuff in in.h behind #ifdef INET6.
+    See bug#7643.  */
+ #if defined(AF_INET6) && defined(IRIX6_5)
+ #define INET6
+ #endif
+ 
  #include <netinet/in.h>
  #include <arpa/inet.h>

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