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From: "J. L." <jlsgarrido AT hotmail DOT com>
To: <djgpp AT delorie DOT com>
References: <age8re$e54$1 AT news4 DOT jaring DOT my>
Subject: Re: DJCPP linking errors.
Date: Tue, 9 Jul 2002 12:12:59 -0500
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Reply-To: djgpp AT delorie DOT com


----- Original Message -----
From: "Patrick Chen" <pck66 AT pd DOT jaring DOT my>
Newsgroups: comp.os.msdos.djgpp
To: <djgpp AT delorie DOT com>
Sent: Tuesday, July 09, 2002 4:02 AM
Subject: DJCPP linking errors.


> Hello Folks,
>       I face the linking errors for the object files of
> draw_plot.c(library), DrawCircle.c. But individual compilation of each
> source files gave no errors:
>
> draw_plot.c file:
> (part of program)
> #include "draw_plot.h"
> void vid_mode(byte_t mode){
>  union REGS regs;
>  regs.h.ah = 0;
>  regs.h.al = mode;
>  int86(0x10,&regs,&regs);
> }
>
> draw_plot.h file:
> typedef unsigned char byte_t;
> byte_t* double_buffer;
> ..
> extern void
> vid_mode(byte_t mode);

You are cuting the contents of file. Are you sure that there are another
line (in another file) with the prototype of vid_mode()?

>
> DrawCircle.c file:

Like Martin wrote, you need include draw_plot.h

> int main() {
> ..
> vid_mode(0x13);
> ..
> }
>
> Link Errors:
> draw_plot.o:
> draw_plot.c: multiple definition of "_vid_mode"
>
> Other functions in the library face the link error messages.
> What is wrong and how to solve this challenge?
>
> Thank you
>
> Patrick
>
>

Again, revise your code for another line like
extern void vid_mode(byte_t mode);