can't use the DATA SERVER

QNX DEVELOPERS General Programming
1

Hi,

today I try to use the QNX Dataserver , but everytime I failed:

At first I have started the DS with ds & , everthing is ok - it will be running!
Now I have try to compile my C Application - it fails with many errors e.g. no reference …

Here ist the minimal testcode I have wrote:

#include <stdlib.h>
#include <stdio.h>
#include <ds.h>

#define MAXLEN 4

int main(int argc, char *argv[]) {

ds_t	ds_variable;
ds_variable = ds_register();

return 0;

}

The undefinde reference is ds_register, but the Header ds.h is allready included and will be found because ds_t is accepted - whats wrong ?
The header might be ok, I have checked it!

Thanks!

2

what error are you getting?

3

Every ds function ds_register(), ds_deregister() … : unreferenced funktion ! So that mean, I know, there is no Functioncall - the Header is included and will be ok!

4

I checked over here, and it is not giving any error. What compiler you are using!!
Because here I have used qcc, gcc for QNX.

5

AH that’s a linker error not a compiler error. It means the linker can’t resolved these function name. Are you using QNX4 if so you need to add the ds3r.lib library, this is explained in the documentation.

6

Hm, I´m using QNX6 (6.3.2. SP2) - Mementics under Windows - which libary is requierd, so I can check it is installed. The Help-Example didn’t work to!

The compiler ist the QNX-gcc!

Any more ideas?

7

I looked at the documentation of ds_register() and it says “Library: libds”. It seems -lds should solve your problem.