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



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


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