simple error

utkarshrawat · 08-20-2010, 09:40 PM

I have 3 C files but iam getting an error

Code:

/tmp/ccomGubn.o: In function `main':
main.c:(.text+0x17): undefined reference to `hye2'
collect2: ld returned 1 exit status

main.c

Code:

#include<stdio.h>
//#include<conio.h>
#include"hye2.h"
//extern int hye2();
main()
{
printf("\nHYE");
hye2();

}

hye2.c

Code:

int hye2()
{
printf("\nHYE2");
}

hye.h

Code:

int hye2();

It seems everything is ok but not getting were is the problem

graemef · 08-20-2010, 10:21 PM

You need to show the commands that you used to compile and then link this program.

Because you have three files you need to include all of them in the process. The error that you have indicates that the linker doesn´t know about hye2.c

Finally, you may want to read up and consider using tools such as make.

paulsm4 · 08-20-2010, 11:52 PM

For example:

Quote:

gcc -o myprog main.c hye2.c

AnanthaP · 08-21-2010, 03:00 AM

You seem to have commented out the extern statement. I can understand commenting out conio.h, it being a DOS header.

colucix · 08-21-2010, 03:31 AM

Shouldn't the file hye2.c be named hye2.h?!?

grail · 08-21-2010, 03:35 AM

I thought it was that "hye.h" should be "hye2.h" seeing it is being included but doesn't exist.

paulsm4 · 08-21-2010, 09:25 PM

Hi -

Quote:

Shouldn't the file hye.h be named hye2.h?!?

Irrelevant - the problem is a link error. #including the wrong header would result in a compile error.

"hye2.c" is named perfectly appropriately (although I would #include "hye.h" in hye2.c).

My guess is the OP probably just wasn't linking in "hye2.o" (separate compilation) or "hye2.c" (single-step compile/link, as in my example).

IMHO .. PSM