gcc -lcrypt flag error in UNIX C - Undefined Reference to crypt() - c

Question

I use crypt() function and the compile flag named -lcrypt the problem is that the compiler says undefined reference to crypt(). Can anyone tell me what I'm doing wrong?
Makefile
CC = gcc
CFLAGS=-Wall -lm -lcrypt
OBJS = get_passwords_hashed.o
PROG = get_passwords_hashed.exe
#adicionar or mudar o OBJS se tiver outras files para o programa
#GENERIC
all: ${PROG}
clean:
rm ${OBJS} *~ ${PROG}
${PROG}: ${OBJS}
${CC} ${OBJS} -o $#
.c.o:
${CC} $< -c -o $#
# $# - turns .c into .o
###################################
#dependencias
so_final.o: get_passwords_hashed.c get_passwords_hashed.h
main.c
#include <stdio.h>
#include <string.h>
#include <crypt.h>
int testar_pass(char ant[],char (*pointer_hashes)[max_chars_string]){ // ponteiro para array de chars - char ** ant
char * password ;
char * encrypted;
password = malloc(strlen(ant)*sizeof(char)); //password calculada recebida anteriror
encrypted = malloc(strlen(ant)*sizeof(char));//hash
strcpy(password,ant);
encrypted = crypt(password,"10");
if(strcmp(*pointer_hashes,encrypted) == 0){
return 1;
}
else return 0;// devolve erro
}

Answer 1

Pass -lm -lcrypt at the end of your compilation line.
LIBS=-lm -lcrypt
${CC} ${OBJS} -o $# ${LIBS}
EDIT:
The explanation of why it makes a difference (as requested in a comment) from gcc manual:
-llibrary
[...]
It makes a difference where in the command you write this option; the linker searches and processes libraries and object files in the
order they are specified.
Thus, ‘foo.o -lz bar.o’ searches library ‘z’ after file ‘foo.o’ but before ‘bar.o’. If ‘bar.o’ refers to functions in ‘z’, those functions
may not be loaded.