v_clear sample code anyone? None in docs for gcc/emx

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5 total messages Started by Martin & Alethea Wed, 11 Mar 1998 00:00

#307

Author: Martin & Alethea
Date: Wed, 11 Mar 1998 00:00

20 lines
1183 bytes

Using gcc 2.7.2 under emx in os/2

I'm a novice still so no graphics involved I just have a text mode 
program where I want to clear the screen.  From the docs I assume 
v_clear() is the function I need.  I've included <sys/video.h> and 
called the function:

v_clear();

but the compiler doesn't recognise it as a function (undefined symbol 
referenced from text segment).
There don't seem to be any examples in the sample code or docs.

TIA

_____________________
Martin , Cornwall UK

Warped through and through

Re: v_clear sample code anyone? None in docs for gcc/emx

#304

Author: Robert S Smith
Date: Wed, 11 Mar 1998 00:00

32 lines
1546 bytes

Martin & Alethea wrote:
> 
> Using gcc 2.7.2 under emx in os/2
> 
> I'm a novice still so no graphics involved I just have a text mode
> program where I want to clear the screen.  From the docs I assume
> v_clear() is the function I need.  I've included <sys/video.h> and
> called the function:
> 
> v_clear();
> 
> but the compiler doesn't recognise it as a function (undefined symbol
> referenced from text segment).
> There don't seem to be any examples in the sample code or docs.
> 
> TIA
> 
> _____________________
> Martin , Cornwall UK
> 
> Warped through and through

Are you sure its the compiler and not the linker?
It sounds like you just need to include the correct library when you
link, and that should take care of it.  Unfortunately, I have no idea
which one it would be.

Hope that helps

Rob Smith
rss@nbt.com

Re: v_clear sample code anyone? None in docs for gcc/emx

#305

Author: James Youngman
Date: Thu, 12 Mar 1998 00:00

10 lines
878 bytes

>>>>> "Martin" == Martin & Alethea <tes01_nospam_@globalnet.co.uk> writes:


  Martin> v_clear();

  Martin> but the compiler doesn't recognise it as a function
  Martin> (undefined symbol referenced from text segment).

Please read the FAQ for "comp.lang.c".

Re: v_clear sample code anyone? None in docs for gcc/emx

#306

Author: Mikael St�ldal
Date: Thu, 12 Mar 1998 00:00

21 lines
1412 bytes

In article <voFHBstkGWlw-pn2-FLpwxF4ppdmw@localhost>,
tes01_nospam_@globalnet.co.uk (Martin & Alethea) wrote:

>v_clear();
>
>but the compiler doesn't recognise it as a function (undefined symbol 
>referenced from text segment).

Try to link with the "video" library, -lvideo.

Tip: to find out in which library a particular function resides in, use:

grep -l "the_funcion" \emx\lib\*.a

-- 
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Re: v_clear sample code anyone? None in docs for gcc/emx

#303

Author: Cindy Ross
Date: Mon, 16 Mar 1998 00:00

18 lines
1241 bytes

In <voFHBstkGWlw-pn2-FLpwxF4ppdmw@localhost>, tes01_nospam_@globalnet.co.uk (Martin & Alethea) writes:
>Using gcc 2.7.2 under emx in os/2
>
>I'm a novice still so no graphics involved I just have a text mode
>program where I want to clear the screen.  From the docs I assume
<clip>

A simple (but not the most efficient) way to clear the screen is:

#include <stdlib.h>
..
system("cls");

-------------------------------------------------------------
Cindy Ross                                 rossc@us.ibm.com
(These opinions are just mine, I only represent myself, etc.)
-------------------------------------------------------------

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