[PARPORT] ppdev compilation problem

From: Palkó Zoltán (zotya@ivn.hu)
Date: Thu Jan 17 2002 - 17:02:11 EST

  • Next message: Tim Waugh: "Re: [PARPORT] ppdev compilation problem"

    Hello!

    I tried to use the ppdev to drive my home-built device connected to my
    paralell port.
    First I tried to make a skeleton program, wich does nothing, but I got
    compilation errors.

    Here is the code part: 

    ---
int pportinit(void)
{
    int ddir;
 
    ddir=1;
    fd=open("/dev/parport0",O_RDWR);
    if (fd > 0)
    {
        if (ioctl(fd,PPEXCL))
            return (-1);
        if (ioctl(fd,PPCLAIM))
            return(-2);
        return(fd);
    }
    return(-3);
}
...
---

    And the error :
zotya@home:~/parportdrv$ gcc parportdrv.c 
/tmp/ccn48AJg.o: In function `pportinit': /tmp/ccn48AJg.o(.text+0x3d): 
undefined reference to `_IO' /tmp/ccn48AJg.o(.text+0x70): undefined reference 
to `_IO' /tmp/ccn48AJg.o: In function `main': /tmp/ccn48AJg.o(.text+0xde): 
undefined reference to `_IO' collect2: ld returned 1 exit status

    It seems a library linking problem, but I only found _IO references into libc.
What I missed?

    -- 
Zotya

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