Re: [OT] Need a little C programming help

[Mike Reinehr <cmr@amsent.com>]

Andreas & Erik,

Thanks very much for your help. The include files were, in fact, within the 
main block. I'd swear that they have been there for years, but I'll worry 
about that some other time. It's quite possible that I made a change six 
months or so ago and now just don't remember. Anyway, relocating them as you 
suggested completely solved the problem.

Thanks, also, for the compiling tips. I'll start experimenting with them.

Sincerely,

cmr

On Tuesday 12 September 2006 07:36, Erik Mouw wrote:
> On Mon, Sep 11, 2006 at 05:44:37PM -0500, Mike Reinehr wrote:
> > My apology for taking up the groups time with an off-topic request for
> > help. I don't think that this has anything at all to do with 64-bit
> > processing. What I know about c programming wouldn't take me five minutes
> > to tell, so I'm easily stumped by compiler error messages.
> >
> > I have a very small c program that is running on our local AMD64 server,
> > which is running an up to date Debian Sarge. I've compiled this program
> > many times over the past year by simply typing `cc swrc.c` and then
> > weeding out my many c errors.
> >
> > This evening, I had to make very minor change to the program but when I
> > attempted to compile I received the following error output:
> >
> > cmr@gladsheim:~/tmp$ cc swrc.c
>
> Try gcc -Wall instead, that gives you a lot more hints about what's
> wrong.
>
> > In file included from /usr/include/sys/types.h:219,
> >                  from /usr/include/stdlib.h:433,
> >                  from swrc.c:5:
> > /usr/include/sys/sysmacros.h: In function `main':
> > /usr/include/sys/sysmacros.h:43: error: nested function `gnu_dev_major'
> > declared `extern'
> > /usr/include/sys/sysmacros.h:49: error: nested function `gnu_dev_minor'
> > declared `extern'
> > /usr/include/sys/sysmacros.h:55: error: nested function `gnu_dev_makedev'
> > declared `extern'
> > cmr@gladsheim:~/tmp$
>
> Nested functions? Looks like you're including a header file in a
> function instead of outside of it. If you know what you're doing it
> shouldn't be a problem, but as a general rule don't even try that.
>
> > I would really appreciate someone telling me what I'm doing wrong, or at
> > least giving me a hint!
>
> Always compile with -Wall. Adding -Wshadow sometimes also reveals
> interesting bugs.
>
>
> Erik
>
> --
> +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 --
>
> | Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands

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