Compile embedded lua in C

Question

Hey everyone I found this code that embeds Lua in C and I cannot figure out how to get GCC to compile it. I have Lua installed, but how do I link the Lua libraries?

Here is the code I found:

            #include <stdio.h>
            #include "lua.h"
            #include "lualib.h"
            #include "lauxlib.h"

            /* lua interpreter */
            lua_State* l;

            int main () {
            int dofile;

            /* initialize lua */
            l = lua_open();

            /* load lua libraries */
            luaL_openlibs(l);

            /* run the hello.lua script */
            dofile = luaL_dofile(l, "hello.lua");

            if (dofile == 0) {
            /* call foo */
            lua_getglobal(l,"foo");
            lua_call(l,0,0);
            }
            else {
            printf("Error, unable to run hello.lua\n");
            }

            /* cleanup Lua */
            lua_close(l);

            return 0;
            }

How do I get this to compile?

I am trying this command to compile

gcc -o embed_hello -L/users/etrosclair/Downloads/lua-5.1.4 -I/users/etrosclair/Downloads/lua-5.1.4 luaTest.c

Here is the error:

Undefined symbols for architecture x86_64:
  "_luaL_newstate", referenced from:
      _main in ccF0995Q.o
  "_luaL_openlibs", referenced from:
      _main in ccF0995Q.o
  "_luaL_loadfile", referenced from:
      _main in ccF0995Q.o
  "_lua_pcall", referenced from:
      _main in ccF0995Q.o
  "_lua_getfield", referenced from:
      _main in ccF0995Q.o
  "_lua_call", referenced from:
      _main in ccF0995Q.o
  "_lua_close", referenced from:
      _main in ccF0995Q.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

All the lua libraries and headers are in the lua-5.1.4 folder the .o files are also in there too.

Thanks

probably something like -llua on the command line. Why don't you show us some errors? — Dan
– Dan, Commented Nov 6, 2011 at 0:57

daurnimator · Accepted Answer · 2011-11-06 07:52:33Z

8

Depends if you want it statically or dynamically compiled.

For static, add -llua (or lua5.1 or lua51; depending on your setup)

answered Nov 6, 2011 at 7:52

daurnimator

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2 Comments

Michal Kottman Over a year ago

It also works for shared libraries, so OP should try adding -llua, -llua5.1 and -llua-5.1 to the command line.

Sebastian Over a year ago

if available on your system, you could use gcc -o hello hello.o $(pkg-config --libs lua)

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