I need help on compiling

[Yomyung Leem]

I am having a trouble compiling the following C source. (Attached at the tail of
this message)

I get the following message:

C:\CSL>make makekey
gcc     makekey.c   -o makekey
makekey.c: In function `main':
makekey.c:64: warning: assignment makes pointer from integer without a cast
/cygdrive/c/TEMP/ccgqdRim.o(.text+0x44):makekey.c: undefined reference to `crypt
'
collect2: ld returned 1 exit status
make: *** [makekey] Error 1

I have downloaded the latest cygwin, (DLL version 1.1.8).

Any help would be appreciated!!

Thanks,
Yung

===========================  makekey.c 
=========================================

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1990, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)makekey.c	8.1 (Berkeley) 6/4/93";
#endif /* not lint */

#include <sys/types.h>

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

static void get (char *, int);

int
main()
{
	int len;
	char *r, key[9], salt[3];

	get(key, sizeof(key) - 1);
	get(salt, sizeof(salt) - 1);
	len = strlen(r = crypt(key, salt));
	if (write(STDOUT_FILENO, r, len) != len)
		perror("stdout");
	exit(0);
}

static void
get(bp, len)
	char *bp;
	register int len;
{
	register int nr;

	bp[len] = '\0';
	if ((nr = read(STDIN_FILENO, bp, len)) == len)
		return;
	if (nr >= 0)
		errno = ENODATA;
	perror("stdin");
}

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