Re: cvs commit: src/sys/net rtsock.c src/sys/netproto/atalk at_proto.c src/sys/netproto/ipx ipx_proto.c src/sys/netproto/natm natm_proto.c

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Matthew Dillon wrote:
> :
> :Joerg Sonnenberger wrote:
> :> It should be enough and
> :> correct to remove the extern (or declar it static there as well).
> :
> :The former gives an error (which is what confused me initially) while 
> :s/extern/static/ will work (see my commit from ~15min. ago).
> :
> :Sascha
>
>     Hmm.  That works for procedures, but it's a bad idea to
>     forward-declare storage declarations because the compiler
>     cannot really discern that the first one is meant to be
>     a forward declaration.  If GCC does, it's a dangerous
>     quirk.

No, that's valid ANSI C.  You are allowed to have as many declarations for the same identifier as you want (section 6.7, sentence 3):

If an identifier has no linkage, there shall be no more than one declaration of the identifier (in a declarator or type specifier) with the same scope and in the same name space, except for tags as specified in 6.7.2.3.

>     I see the problem now that you've pointed it out.  I didn't
>     notice the circular loop there and I think the only correct
>     solution is your original commit (keeping natmdomain as a
>     global) :-)

neither gcc34 nor gcc41 have problems with this:

% cat >d.c <<EOF
int i;
int i;
EOF
% cc -Wall -c d.c
%

cheers
 simon

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