Re: Programing Question

[Pigeon <jah.pigeon@ukonline.co.uk>]

On Sat, Mar 29, 2003 at 09:10:37PM -0600, Harley D. Eades III wrote:
> Pigeon wrote:
> >On Sat, Mar 29, 2003 at 12:09:44AM -0600, Harley D. Eades III wrote:
> >>Hello,
> >>  This might be off topic, but I hope someone can answer a question 
> >>for me. Is there any documentation on parport.h parport_pc.h.  I seem to 
> >>get err's when I try to use either of them.
> >>Do you have to link to a lib? I am not shere I am trying to learn more 
> >>about devices and such. Any help will be appreciated.
> >
> >You might try Documentation/parport.txt and
> >Documentation/parport-lowlevel.txt in the kernel source tree.
> >
> >Your question is a bit vague. What are you trying to do? What errors
> >do you get?
> >
> >Shots in the dark: Have you got "Support for user space parallel port
> >drivers" (CONFIG_PPDEV) enabled in your kernel config? Have you
> >installed/played with libieee1284/libieee1284-dev?
> >
> >Pigeon
> >
> Thanks for the reply,
>    Really all I am doing is learning more about device drivers and 
> such. So to learn I am reinventing the wheel and writing a cheap little 
> printer driver just to get a hold of things. Yes my question was vague, 
> I was up late that night so I was not all there ;). Yes all the correct 
> parport modules are loaded. and about the libieee1284/libieee1284-dev, 
> no I will check it out thanks. And Eric thanks for the mailing lists I 
> will check those out also thanks for the help.
> 
> hde
> 
> Errors:
> 
> #include <linux/parport_pc.h>
> 
> int main ()
> {
>    return 0;
> }
> 
> $ gcc -c test.c
> In file included from test.c:1:
> /usr/include/linux/parport_pc.h:40: parse error before `dma_addr_t'

<snip loads more>

parport_pc.h isn't meant to be included on its own. It's supposed to
be pulled in by parport.h. If you delete the '_pc' from the code
fragment above all those errors go away.

Pigeon