Can't compile a couple of lines?

Question

linux

I decided to play around with the LPT port, tu-ta googled the simplest source.
What I'm doing:
created two files

lptout.c

/************************************************************************
*                                    *
*    lptout - vkluchaet ili vyklychaet ukazannyy kanal v        *
*        portu LPT. Programma sozdana dlya raboty s        *
*        ustroystvom NK150 ot Master Kit.            *
*                                    *
************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/io.h>
/***********************************************************************/
#define MYNAME "lptout"

#define LPT_PORT 0x378

#define CHANNEL_1 0x1
#define CHANNEL_2 0x2
#define CHANNEL_3 0x4
#define CHANNEL_4 0x8
#define CHANNEL_5 0x10
#define CHANNEL_6 0x20
#define CHANNEL_7 0x40
#define CHANNEL_8 0x80
#define ALL_CHANNELS_ON 0xff
#define ALL_CHANNELS_OFF 0x0
/***********************************************************************/
void init_port(unsigned long port);
void close_port(unsigned long port);
void send_signal(unsigned char signal, unsigned long port);
unsigned char channel_to_signal(int ch);
unsigned char load_signal(unsigned long port);
/***********************************************************************/
/***********************************************************************/
int main(int argc, char **argv)
{
    ////////////////////////
    int ch;               // Nomer kanala
    unsigned char signal; // Signal
    ////////////////////////

    if ( argc != 2 )
    {
        fprintf(stderr, "usage: %s \"channel\"\n", MYNAME );
        exit(1);
    }

    if ( !isdigit( (int) argv[1][0]) )
    {
        fprintf(stderr, "usage: %s \"channel\"\n", MYNAME );
        exit(1);
    }

    ch = atoi(argv[1]); // Poluchaem nomer kanala

    if ( ch < 0 || ch > 9 )
    {
        fprintf(stderr, "%s 0 <= channel <= 9\n", MYNAME );
        exit(1);
    }

    signal = channel_to_signal(ch); // Delaem signal iz kanala

    init_port(LPT_PORT); // Otkryvaem port

    if ( (signal != ALL_CHANNELS_OFF) && (signal != ALL_CHANNELS_ON) )
        signal ^= load_signal(LPT_PORT); // Dobavlyaem k signalu starye znacheniya

    send_signal(signal, LPT_PORT); // Otpravlyaem signal

    close_port(LPT_PORT); // Zakryvaem port

    return 0;
}
/***********************************************************************/
void init_port(unsigned long port)
{
    if ( ioperm(port, 1, 1) != 0 )
    {
        fprintf(stderr, "%s: cannot get port 0x%x: %s\n",
            MYNAME, port, strerror(errno) );
        exit(1);
    }
}
/***********************************************************************/
void close_port(unsigned long port)
{
    if ( ioperm(port, 1, 0) != 0 )
    {
        fprintf(stderr, "%s: cannot close port 0x%x: %s\n",
            MYNAME, port, strerror(errno) );
        exit(1);
    }
}
/***********************************************************************/
void send_signal(unsigned char signal, unsigned long port)
{
    outb(signal, port);
}
/***********************************************************************/
unsigned char channel_to_signal(int ch)
{
    switch (ch)
    {
        case 1 : return CHANNEL_1;
        case 2 : return CHANNEL_2;
        case 3 : return CHANNEL_3;
        case 4 : return CHANNEL_4;
        case 5 : return CHANNEL_5;
        case 6 : return CHANNEL_6;
        case 7 : return CHANNEL_7;
        case 8 : return CHANNEL_8;
        case 9 : return ALL_CHANNELS_ON;
        case 0 : return ALL_CHANNELS_OFF;
    }

    return ALL_CHANNELS_OFF;
}
/***********************************************************************/
unsigned char load_signal(unsigned long port)
{
    return inb(port);
}
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/

and

Makefile

##
# Makefile
CC=gcc
#
PROG=lptout
OBJ=lptout.o
SRC=lptout.c
#
#
lptout: $(OBJ)
    $(CC) -o $(PROG) $(SRC)

clean:
    rm -f $(OBJ) $(PROG)

I have an error

$ make
Makefile:11: *** missing separator.  Stop.

Please tell me what is wrong here?

Answer 1

Use tabs for intention, not spaces