在Linux环境下无法在OSX终端上编译代码的困难

Question

I'm taking some working code (that I didn't write and the creator is not around anymore) to try and get it to compile on my Mac (10.9.5) using terminal. I'm getting the following error when compiling ( gcc -o code code.c ):

Undefined symbols for architecture x86_64:   

    "_add_history", referenced from:
          _rl_gets in talk-c856c6.o   
    "_read_history", referenced from:
          _main in talk-c856c6.o   
    "_readline", referenced from:
          _rl_gets in talk-c856c6.o   
    "_write_history", referenced from:
          _rl_gets in talk-c856c6.o
    ld: symbol(s) not found for architecture x86_64

here are all my includes:

#include <stdio.h> 
#include <stdlib.h> 
#include <string.h> 
#include <sys/types.h> 
#include <sys/stat.h> 
#include <fcntl.h> 
#include <termios.h> 
#include <strings.h> 
#include <readline/readline.h> 
#include <readline/history.h>

I've found here and elsewhere online similar issues and have tried

#include <readline.h>

but get fatal error: 'readline.h' file not found (same for #include <libedit.dylib> )

I'm a bit of a novice with external libraries so maybe I need to install another one? Is my issue just that the mac needs an additional library installed to use those 5 functions creating errors, or are one of my #includes only for Linux and not for Mac? I thought since both the Mac and the Linux are using Unix it would be the same, but apparently there are subtleties I don't understand.

Thanks in advance.

Answer 1

Did you bass the correct flags to the compiler? Seems like you are not linking against the libedit . Try passing -ledit to the compiler and tell us if that helps.

#include <libedit.dylib>

This is never correct. You can't #include a library, you need to tell the compiler that you want to link against this library when invoking it.