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

[Arnaud Lacombe <lacombar%gmail.com@localhost>]

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.
 
  - Arnaud