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From: jbs30000 AT aol DOT com (Joel)
Newsgroups: comp.os.msdos.djgpp
Subject: Ignore my last post, please read this
Date: 29 Sep 2003 17:37:26 -0700
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

OK, after looking at my last post, I see it's too long and hard to
read, so I'll make this question very simple.  If a routine includes
these external declarations:

extern void Bank_Plot_8(unsigned short X, unsigned short Y, unsigned
char R, unsigned char G, unsigned char B, unsigned char LO);

extern void Linear_Plot_8(unsigned short X, unsigned short Y, unsigned
char R, unsigned char G, unsigned char B, unsigned char LO);

extern void (*Plot_Pixel)(unsigned short X, unsigned short Y, unsigned
char R, unsigned char G, unsigned char B, unsigned char LO);

extern unsigned long (*Pixel_Point)(unsigned short X, unsigned short
Y);

And then I go

Plot_Pixel = &Linear_Plot_8;

Pixel_Point = &Linear_Point_8;

And I get an error:

Error: undefined reference to `Linear_Point_8(unsigned short, unsigned
short)

What could be the problem?  Thank you.