Re: toolchain/44102: Internal compiler error on trivial source

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR toolchain/44102; it has been noted by GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, toolchain-manager%netbsd.org@localhost, 
        gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
lacombar%gmail.com@localhost
Cc: 
Subject: Re: toolchain/44102: Internal compiler error on trivial source
Date: Wed, 17 Nov 2010 12:38:16 -0500

 On Nov 17,  4:55pm, lacombar%gmail.com@localhost (Arnaud Lacombe) wrote:
 -- Subject: Re: toolchain/44102: Internal compiler error on trivial source
 
 | The following reply was made to PR toolchain/44102; it has been noted by 
GNATS.
 | 
 | From: Arnaud Lacombe <lacombar%gmail.com@localhost>
 | To: Paul Koning <paul_koning%dell.com@localhost>
 | Cc: gnats-bugs%netbsd.org@localhost, toolchain-manager%netbsd.org@localhost, 
 |      gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
 | Subject: Re: toolchain/44102: Internal compiler error on trivial source
 | Date: Wed, 17 Nov 2010 11:53:03 -0500
 | 
 |  Hi,
 |  
 |  On Wed, Nov 17, 2010 at 10:44 AM, Paul Koning 
<paul_koning%dell.com@localhost> wrote:
 |  >
 |  > On Nov 17, 2010, at 12:30 AM, David Holland wrote:
 |  >
 |  >> The following reply was made to PR toolchain/44102; it has been noted by 
GNATS.
 |  >>
 |  >> From: David Holland <dholland-bugs%netbsd.org@localhost>
 |  >> To: gnats-bugs%NetBSD.org@localhost
 |  >> Cc:
 |  >> Subject: Re: toolchain/44102: Internal compiler error on trivial source
 |  >> Date: Wed, 17 Nov 2010 05:29:11 +0000
 |  >>
 |  >> On Wed, Nov 17, 2010 at 05:20:01AM +0000, lacombar%gmail.com@localhost 
wrote:
 |  >>> static inline void __attribute__((noreturn))
 |  >>> __bug()
 |  >>> {
 |  >>> }
 |  >>
 |  >> Yes, so it shouldn't crash, but this is not valid code and there is
 |  >> almost certainly no way to trigger the problem with valid code.
 |  >>
 |  >> Probably not even all that hard to find by inspecting the gcc source...
 |  >
 |  > I'm not sure about not that hard...
 |  >
 |  > Some testing shows the following:
 |  >
 |  > gcc 4.2.1 (on Mac OS) also has the issue
 |  > gcc 4.5.0 (for MIPS/NetBSD) is ok
 |  > gcc 4.6.0 (current trunk pre-release) is ok
 |  >
 |  > "ok" means it produces a warning "'noreturn' function does return".
 |  >
 |  it looks like:
 |  
 |  http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37879
 |  
 |  But I'm not sure the fix will not have GPLv3 issue.
 |  
 |  > So one solution to this PR would be to update the toolchain to 4.5.1 (the 
latest released gcc).
 |  >
 |  this will clearly have a GPLv3 issue :) Which I kinda remind a lot
 |  people are not fond of.
 
 Been there, done that (binutils). Unless we want to immitate OpenBSD...
 
 christos