Re: Unused Variables warnings with global consts.h header file
Re: Unused Variables warnings with global consts.h header file
- Subject: Re: Unused Variables warnings with global consts.h header file
- From: "Clark Cox" <email@hidden>
- Date: Mon, 28 Jan 2008 10:08:59 -0800
On Jan 27, 2008 5:33 PM, Keary Suska <email@hidden> wrote:
> on 1/27/08 5:51 AM, email@hidden purportedly said:
>
> >
> > I get these strange warnings from Xcode 2.4.1/GCC 4.0 when compiling with the
> > Unused Variables switch turned on.
> > The problem is caused by a global consts.h file declaring lots of constants,
> > mostly enums, but also a couple of const definitions, included by almost every
> > file in the project.
> > For many of these files gcc gives me the warning:
> >
> > warning: 'kTBButtonDef' defined but not used
> >
> > for my consts.h file containing these definitions:
> >
> >
> > #ifndef _H_CONST
> > #define _H_CONST
> >
> >
> > struct tTBButtonDefinition {
> > int ControlIdx;
> > char IcnsFile[256];
> > int CommandID;
> > };
> >
>
> This is because the above is a definition, rather than a declaration. It
> looks like you want a declaration:
In C and C++, definitions *are* declarations (though not all
declarations are definitions).
> typedef struct {
> int ControlIdx;
> char IcnsFile[256];
> int CommandID;
> } tTBButtonDefinition;
>
> And I think the error will go away.
I doubt that will change anything. Since the original compiled without
error (just the warning), the OP is obviously using C++ (or there is a
typedef that we aren't seeing); in which case your definition and
theirs are semantically identical.
--
Clark S. Cox III
email@hidden
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