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Why is Lua messing up my linkage to the CRT libraries

General and Gameplay Programming Programming

Started by Drakkcon July 21, 2006 03:53 PM

6 comments, last by Drakkcon 17 years, 9 months ago

Drakkcon

612

Author

July 21, 2006 03:53 PM

Here is my simple C++ program:


#include "lua.hpp"

int main(int argc, char** argv)
{
    using namespace std;
    
    lua_State* VM = lua_open();
}

Here are my errors:


C:/Dev-Cpp/lib/liblua5.1.a(lauxlib.o)(.text+0x12a4):lauxlib.c: undefined reference to `__errno'

C:/Dev-Cpp/lib/liblua5.1.a(lauxlib.o)(.text+0x13e8):lauxlib.c: undefined reference to `__getreent'
C:/Dev-Cpp/lib/liblua5.1.a(lauxlib.o)(.text+0x14b8):lauxlib.c: undefined reference to `__getreent'
C:/Dev-Cpp/lib/liblua5.1.a(lauxlib.o)(.text+0x151e):lauxlib.c: undefined reference to `__getreent'
C:/Dev-Cpp/lib/liblua5.1.a(lauxlib.o)(.text+0x1654):lauxlib.c: undefined reference to `__getreent'
C:/Dev-Cpp/lib/liblua5.1.a(lobject.o)(.text+0x13a):lobject.c: undefined reference to `_imp___ctype_'
C:/Dev-Cpp/lib/liblua5.1.a(ldo.o)(.text+0xdf):ldo.c: undefined reference to `setjmp'
C:/Dev-Cpp/lib/liblua5.1.a(llex.o)(.text+0x65):llex.c: undefined reference to `_imp___ctype_'
C:/Dev-Cpp/lib/liblua5.1.a(llex.o)(.text+0x4f5):llex.c: undefined reference to `_imp___ctype_'
C:/Dev-Cpp/lib/liblua5.1.a(llex.o)(.text+0x51c):llex.c: undefined reference to `_imp___ctype_'
C:/Dev-Cpp/lib/liblua5.1.a(llex.o)(.text+0x555):llex.c: undefined reference to `_imp___ctype_'
C:/Dev-Cpp/lib/liblua5.1.a(llex.o)(.text+0x961):llex.c: undefined reference to `_imp___ctype_'
C:/Dev-Cpp/lib/liblua5.1.a(llex.o)(.text+0xb5b):llex.c: more undefined references to `_imp___ctype_' follow

It's like the C runtimes aren't being linked or something. Can anyone help? PS: (It works normally, but when I include lua it gives the above errors)

Evil Steve

2,021

July 21, 2006 03:59 PM

I don't know about lua.hpp, but lua.h needs to wrapped in an extern "C" block when you include it in a C++ spurce file, like so:

extern "C" {#include <lua.h>}

Are those linker errors? I know nothing about Dev-Cpp...

Drakkcon

612

Author

July 21, 2006 04:01 PM

It is wrapped, that's what lua.hpp does. It's just that block of code.

Yes, those are linker errors. Undefined reference ones which means that the library isn't being included at all.

Shannon Barber

1,684

July 21, 2006 05:46 PM

Check all the library includes and make sure it is linking the library.

Try

int main()
{
printf("Hello World!\n");
}

And see if that links

- The trade-off between price and quality does not exist in Japan. Rather, the idea that high quality brings on cost reduction is widely accepted.-- Tajima & Matsubara

Drakkcon

612

Author

July 21, 2006 05:50 PM

It works. It's only a problem when I include lua.