Re: Changes in C++ FE regarding pedwarns to be errors are harmful

["Ismail Dönmez" <ismail@pardus.org.tr>]

Sunday 13 January 2008 17:41:03 tarihinde Gabriel Dos Reis şunları yazmıştı:
> Ismail Dönmez <ismail@pardus.org.tr> writes:
> | Hi again,
> |
> | Wednesday 09 January 2008 00:28:54 tarihinde Manuel López-Ibáñez şunları
> |
> | yazmıştı:
> | > For your particular example, you could open a regression bug against
> | > 4.3 that says:
> | > * '"foo' redefined" is not mandated by the standard or it is not
> | > serious enough, so it should not be a pedwarn just a normal warning;
> | > or
> |
> | Looks like this is actually mandated by standard :-( , thats what I am
> | told on #gcc anyway :)
>
>     #define foo bar
>     #define foo baz
>
> is asking for trouble -- one should look for fixing the source of that
> inconsistency.

That was just an example, real life testcase shows that problem stems from 
autoconf and its config.h. Projects end up defining things like HAVE_STDLIB_H 
twice which is not harmful at all but now causes an error if g++ is used.

Regards,
ismail

-- 
Never learn by your mistakes, if you do you may never dare to try again.