Question : Need help to compile some code

Hi
i am trying to compile any code from bellow site
http://tldp.org/HOWTO/NCURSES-Programming-HOWTO/ncurses_programs/menus/

example :
menu_multi_column.c  
i am tring to run like ths

 gcc menu_multi_column.c -lcurses
menu_multi_column.c: In function âmainâ:
menu_multi_column.c:35: warning: incompatible implicit declaration of built-in function âcallocâ
/tmp/cci3uwBY.o: In function `main':
menu_multi_column.c:(.text+0xc0): undefined reference to `new_item'
menu_multi_column.c:(.text+0xd9): undefined reference to `new_menu'
menu_multi_column.c:(.text+0xef): undefined reference to `menu_opts_off'
menu_multi_column.c:(.text+0x13b): undefined reference to `set_menu_win'
menu_multi_column.c:(.text+0x175): undefined reference to `set_menu_sub'
menu_multi_column.c:(.text+0x190): undefined reference to `set_menu_format'
menu_multi_column.c:(.text+0x1a3): undefined reference to `set_menu_mark'
menu_multi_column.c:(.text+0x280): undefined reference to `post_menu'
menu_multi_column.c:(.text+0x2ef): undefined reference to `menu_driver'
menu_multi_column.c:(.text+0x304): undefined reference to `menu_driver'
menu_multi_column.c:(.text+0x319): undefined reference to `menu_driver'
menu_multi_column.c:(.text+0x32e): undefined reference to `menu_driver'
menu_multi_column.c:(.text+0x343): undefined reference to `menu_driver'
/tmp/cci3uwBY.o:menu_multi_column.c:(.text+0x358): more undefined references to `menu_driver' follow
/tmp/cci3uwBY.o: In function `main':
menu_multi_column.c:(.text+0x389): undefined reference to `unpost_menu'
menu_multi_column.c:(.text+0x394): undefined reference to `free_menu'
menu_multi_column.c:(.text+0x3b0): undefined reference to `free_item'
collect2: ld returned 1 exit status


how to compile these code

every code giving me same kind of problem

thanks for help

I am trying to execute this from linux console

Answer : Need help to compile some code

>> incompatible implicit declaration of built-in function calloc
You are missing a standard library:
#include <stdlib.h>