Linker errors for sol and lua

[sterile sandal]

Hello. I'm having issues with properly linking sol and lua in my c++ program. I have the supposedly single header version that requires two other headers (config.hpp) and (forward.hpp). Sol's headers are in the folder structure: "sol/include/sol/".

I have included the folder structure "sol/include/"

I think lua is linked properly because it did work before including sol. Though it might be that sol is expecting lua to be somewhere else.

lua headers are located at "lua/include/"

The error points to a line in sol.hpp

sol\include\sol\sol.hpp undefined reference to `luaL_unref(lua_State*, int, int)'

The line at 10531:

luaL_unref(L_, LUA_REGISTRYINDEX, ref);

Is it possible that I need to include something like -llua in my linker? I'm using Embarcadero Devc++ by the way ,so linker settings use -l.

Help would be greatly appreciated.

[night sun]

Yes you need to link the library

Consult the doc for more information

[sterile sandal]

Thanks

[sterile sandal]

Now i'm having trouble with it crashing my program. I narrowed down the issue to the declaration of the lua state.

#ifndef LUA_INTERACT
#define LUA_INTERACT

#define SOL_ALL_SAFETIES_ON 1
#include <sol/sol.hpp>


class LUAINTERACT
{
    public:
    
    std::string luaFile = "script.lua";
    
    sol::state lua;
    
//    sol::table table;
    
    LUA()
    {
        
//        lua.open_libraries(sol::lib::base,sol::lib::io,sol::lib::math,sol::lib::table);

        // Step 1) Load & Parse File
        
//        try
//        {
//            lua.safe_script_file(luaFile);
//            std::cout << "\nLua File read OK!\n";
//        }
//        catch (const sol::error& e)
//        {
//            std::cout << std::string(e.what()) << "\n";
//            
//        }
        
                
    }
    
    
    

    
    
    
    void update()
    {
        

        
        
        
        
        
        

    }
    
};





#endif

[sterile sandal]

Could somebody please help?

[normal phoenix]

#ifndef LUA_INTERACT
#define LUA_INTERACT

#define SOL_ALL_SAFETIES_ON 1
#include <sol/sol.hpp>


class LUAINTERACT
{
    public:
    
    std::string luaFile = "script.lua";
    
    sol::state lua;
    
    LUA()
    {
        
                    
    }
    
    void update()
    {
  
    }  
};
#endif

After removing all the comments, its just an empty class

or almost empty

i dont really see any way of this failing

[night sun]

where is it crashing?

[sterile sandal]

As soon as it starts. Just having the line "sol::state lua;" causes it to crash. I would assume that if it were improperly linked it would not build and compile would it? So I have no idea why it crashes. This is the only instance of sol used in my entire program.Any ideas?

[normal phoenix]

why not use gdb

compile your file with -g

and then

do gdb a.out

then run

and when it crashes type bt

[night sun]

can you show the callstack?

[night sun]

how are you linking6

[night sun]

you always assume the person's environment

[normal phoenix]

I mean i think they can figure out if its a.exe

[night sun]

Embarcadero Devc++ has an integrated debugger

[normal phoenix]

Who the fuck uses dev c++

thats like using codeblocks

[sterile sandal]

That's personal preference.

[sterile sandal]

I honestly never learned how to use the debugger. I couldn't figure it out.

[sterile sandal]

Do you mean profile analysis?

[normal phoenix]

You can set breakpoints to inspect stuff while program is running, or display things like the callstack when the program crashes with them

[night sun]

no

[sterile sandal]

Then please explain it to me cause I don't know what you mean.

[night sun]

I wouldn't say it's 100% subjective

[normal phoenix]

callstack is just list of functions that called the other that called the other ... till the one that had the exception

so if function a called b that failed

the callstack will be a, b

[sterile sandal]

How do I get a look at the callstack?

[normal phoenix]

in gdb you can use bt

or something like that

[night sun]

learn to use your IDE or find a better one

[sterile sandal]

Yeah. Well i've used visual studio. I just don't like it. That's all. But really, I would like to learn how to use my IDE.

[normal phoenix]

why dont you like it

it has a crapton of features

[night sun]

then find some tutorials or read their doc

[sterile sandal]

Note that i'm not talking about the original devc++. I'm talking about embarcadero. There is a difference.

[normal phoenix]

there is, but its not that major

going to visual studio adds like 200features

[sterile sandal]

Where? I don't see very much documentation on it.

[sterile sandal]

Yeah, features that I don't need.

[normal phoenix]

https://www.codingwiththomas.com/blog/a-lua-c-api-cheat-sheet on the internet

[sterile sandal]

If I need something i''ll use visual studio but for now my current project is in devc++.

[normal phoenix]

you need to google well

[normal phoenix]

I mean the debugger would be fairly useful for you right this current moment

but if you dont care, feel free to proceed

[sterile sandal]

Context*

[normal phoenix]

what

[sterile sandal]

I was talking about devc++

[normal phoenix]

im too confused

[night sun]

yeah I agree that it'd be probably be easier to debug your project in VS

[sterile sandal]

Could we not talk about that though? Could you please just kinda help me use gdb? I've not been too sucessful with that in the past.

[night sun]

@sterile sandal https://github.com/Embarcadero/Dev-Cpp/wiki/Debugging

[normal phoenix]

https://github.com/Embarcadero/Dev-Cpp/wiki

yeah

exactly

i found the same thing lol

[normal phoenix]

didnt i tell you how to use it above

wait you dont have separate gcc apart from devc++ do you

[sterile sandal]

Yeah. Could you give me a moment to try it? And then if I have issues could you help me figure them out? I've tried this before and I just need someone to walk me through it.

[sterile sandal]

Yes I do.

I have the latest mingw32

[normal phoenix]

Im instantly responding, doesnt mean im rushing tho

[normal phoenix]

is gdb included with that

[sterile sandal]

I don't know. I need to find out.

[normal phoenix]

just go to the directory where your gcc is located then

and look for gdb.exe

[night sun]

@sterile sandal I don't recommend you try and go this way, ideally you figure out how to do it from your IDE (the link above should help you get started) or you pick a better IDE

[sterile sandal]

The version info file for my compiler says the following:

This is the winlibs Intel/AMD 32-bit standalone build of:
- GCC 13.1.0
- GDB 13.2
- MinGW-w64 11.0.0 (linked with msvcrt)
- GNU Binutils 2.40
- GNU Make 4.4.1
- PExports 0.47
- dos2unix 7.5.0
- Yasm 1.3.0
- NASM 2.16.01
- JWasm 2.12pre
- ccache version 4.8.1
- CMake 3.26.4
- ninja 1.11.1
- doxygen 1.9.7

So It looks like it includes gdb.

[sterile sandal]

There is a command console in the IDE.

[normal phoenix]

alright, open cmd and check if its in your path

[night sun]

well, you do you...

[sterile sandal]

ok

[normal phoenix]

by doing just

gdb.exe

what does it say

[sterile sandal]

It's there

[normal phoenix]

alright

so now, you can compile your program with the -g flag

just cd into the directory where your program is

[sterile sandal]

Yes.

[normal phoenix]

and do g++ -g program.cpp

or something in that sence

[sterile sandal]

Ok. The first error it output is this:

C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/13.1.0/../../../../i686-w64-mingw32/bin/ld.exe: Desk Engine.exe:crtexe.c:(.text+0xba): multiple definition of `WinMainCRTStartup'; C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/13.1.0/../../../../i686-w64-mingw32/lib/../lib/crt2.o:crtexe.c:(.text+0xba): first defined here

[normal phoenix]

Oh damn thats bad

I have no idea how winapi works

it almost seems like it has just included stdlib twice

maybe with -nostdlib?

[sterile sandal]

Could it be that the c part of my compiler is linked incorrectly?

[normal phoenix]

hard to say

[sterile sandal]

nope

I wonder if its a namespace issue. Like if sol or lua is having a conflicting namespace with win32.

[normal phoenix]

What does it say then

[sterile sandal]

Seems to be the typical out-of-bounds error, though I don't know if that's only for out of bounds.

"Process exited after 0.03199 seconds with return value 3221225781"

[normal phoenix]

first google result might work

[normal phoenix]

no, that would be closer to 2/4billion

its just windows errors like 0xc0000001

look

hex is really useful for stuff

[sterile sandal]

Where did you find this?

[sterile sandal]

Do you think it can tell some useful information?

[normal phoenix]

on google

the first result

after googling

multiple definition of WinMainCRTStartup

you just have to select the proper parts and it finds it all instantly

[night sun]

@sterile sandal see? Jonas isn't trying to work with your setup

[normal phoenix]

hmmm elaborate here even i dont get that

[sterile sandal]

Hmm?? My main goal is to get the program working. I don't care what setup fixes it.

[night sun]

then use VS

[normal phoenix]

vs is great

other than being single platform and 60gigs

its great

[sterile sandal]

I don't have a lot of storage space.

[normal phoenix]

how much

[night sun]

delete devc++ asnd mingw

[sterile sandal]

Every time I use a video editor it temporarily takes up 40 GB and if I have visual studio that leaves me with no more space to work on videos.

[normal phoenix]

emptying trashbin also works very often

[normal phoenix]

why not install a second m.2/sata drive?

if its visual studio it can be a hard drive thats about to break anyway

[sterile sandal]

I'm on a laptop. Not a PC.

[normal phoenix]

like a modern one?

on normal laptops back in the day you could upgrade everything

[sterile sandal]

Yeah. A modern one. But it can change the drive. I just can't add a secondary drive.

[normal phoenix]

modern laptops suckkk

[sterile sandal]

yep

[normal phoenix]

but anyways

hmmm

cant you just uninstall some game or something

[sterile sandal]

I don't even have games. I'm literally just overbogged down by software that I use all the time.

[normal phoenix]

also, if your video editor takes 40gigs and youre not editing 2hour 4k things

your vid editor is screwed up so bad

[sterile sandal]

It is 10hr things. So yeah.

I guess my reason for using devc++ is that it's simple ,fast,and lightweight. Perhaps I just prefer that over complicated,slower,and heavyweight.

Even if I lose certain features.

[normal phoenix]

Windows is overall painful for c++, and vs is what makes it less painful

[sterile sandal]

But anyways, thanks for all of your help. This gives me some direction to research into. I'm grateful.

[sterile sandal]

I'll probably use visual studio someday but for now, i'm not really in a position to do so.