Lua Binding Won't Compile with G++ --HELP!

[OmenFelix]

Hey guys. I've recently been trying to get my first Lua binding to work with C++ and well I can't get it to compile.
Here's how I'm compiling it:

Code: Select all

gcc -o luac invoke.cpp -llua51 -llua5.1 -I "C:\Program Files (x86)\Lua\5.1\include" -L "C:\Program Files (x86)\Lua\5.1\lib"

And here's the errors I get:

C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0xf): undefined r
eference to `luaL_newstate()'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x1f): undefined
reference to `luaL_openlibs(lua_State*)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x33): undefined
reference to `luaL_loadfile(lua_State*, char const*)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x5b): undefined
reference to `lua_pcall(lua_State*, int, int, int)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x85): undefined
reference to `lua_tolstring(lua_State*, int, unsigned int*)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0xbb): undefined
reference to `lua_getfield(lua_State*, int, char const*)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0xcf): undefined
reference to `lua_type(lua_State*, int)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0xed): undefined
reference to `lua_settop(lua_State*, int)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x115): undefined
reference to `lua_pushnumber(lua_State*, double)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x133): undefined
reference to `lua_pushnumber(lua_State*, double)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x157): undefined
reference to `lua_pcall(lua_State*, int, int, int)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x17c): undefined
reference to `lua_tolstring(lua_State*, int, unsigned int*)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x1aa): undefined
reference to `lua_isnumber(lua_State*, int)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x1da): undefined
reference to `lua_tonumber(lua_State*, int)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x20e): undefined
reference to `lua_settop(lua_State*, int)'
C:\Users\Admin\AppData\Local\Temp\ccmDm0z8.o:invoke.cpp:(.text+0x21a): undefined
reference to `lua_close(lua_State*)'
collect2: ld returned 1 exit status

What do I have to do to get it to compile?

[short]

Undefined references are usually a sign the linker can't find the code your calling. I've never used lua, but make sure your linking all the libraries.

[OmenFelix]

*REMOVED*

[qpHalcy0n]

Way to be a dick, asshole.

Unless you're willing to work with us to find a possible solution to the problem, don't ask the question.

....."No offense"

[OmenFelix]

Way to be a dick, asshole.

Unless you're willing to work with us to find a possible solution to the problem, don't ask the question.

....."No offense"

I knew I was being 'dickish', but it's the truth.

I'm sorry short. :P

Oh and btw Halcy, it's Marc, the guy you taught how to use VC++ a year ago. :P

[qpHalcy0n]

I'm sorry, I simply don't remember you. I talk to a lot of people. Clearly I didn't verse you on the finer points of tactful behaviour.......

[OmenFelix]

I'm sorry, I simply don't remember you. I talk to a lot of people. Clearly I didn't verse you on the finer points of tactful behaviour.......

I tend not to follow many social protocols, including that one, but I guess I'll try to in my future endeavours.

[dandymcgee]

I tend not to follow many social protocols, including that one, but I guess I'll try to in my future endeavours.

I recommend you start if you expect any assistance in the future. I doubt I'm the only one who is going to ignore people who make such childish remarks to someone genuinely trying to help.

[OmenFelix]

I tend not to follow many social protocols, including that one, but I guess I'll try to in my future endeavours.

I recommend you start if you expect any assistance in the future. I doubt I'm the only one who is going to ignore people who make such childish remarks to someone genuinely trying to help.

I will.

[short]

LOL why did you take down what you posted?

I didn't get to see it..........

[OmenFelix]

LOL why did you take down what you posted?

I didn't get to see it..........

That's a good thing. :P Now I have a chance to redeem myself. :P

Anyway what I was saying was that I've linked to all the libraries in the Lua installation but people keep making reference to a libDL of which I've built and tried to get working but I get the same errors.

[bbguimaraes]

Are you including lua.h instead of lua.hpp?

[OmenFelix]

Are you including lua.h instead of lua.hpp?

GENIUS!!! <3

[bbguimaraes]

Glad to help. The .hpp file works on c and c++. Actually, it's just a wrapper, like the c* file from the c++ standard library (cstring, stype, cstdio, etc). You can check its contents. On my system:

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bruno@bruno-notebook:~$ cat /usr/include/lua5.2/lua.hpp
// lua.hpp
// Lua header files for C++
// <<extern "C">> not supplied automatically because Lua also compiles as C++

extern "C" {
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
}

I also noticed you are using gcc instead of g++ on the command line. I hope you know the difference.

[OmenFelix]

Glad to help. The .hpp file works on c and c++. Actually, it's just a wrapper, like the c* file from the c++ standard library (cstring, stype, cstdio, etc). You can check its contents. On my system:

Code: Select all

bruno@bruno-notebook:~$ cat /usr/include/lua5.2/lua.hpp
// lua.hpp
// Lua header files for C++
// <<extern "C">> not supplied automatically because Lua also compiles as C++

extern "C" {
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
}

I also noticed you are using gcc instead of g++ on the command line. I hope you know the difference.

Ofcourse I know the difference, lol. Just a typo. I use G++ now. :P