Re: Proper way to statically link libraries.
- From: Tim Caswell <tim@xxxxxxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Wed, 19 Sep 2012 18:06:02 -0500
I should mention, this is on Ubuntu 12.04 x64 using latest luajit from
git as well as latest glfw3 from git.
Also the pointer value output by the printf in main() matches the
offset reported by nm for the glfwInit() function.
On Wed, Sep 19, 2012 at 6:03 PM, Tim Caswell <tim@xxxxxxxxxxxxxx> wrote:
> I'm trying to make a simple binary that statically linked in luajit
> and glfw3. I then want to use ffi to call the glfw3 apis.
>
> My program is very simple:
>
> #include <stdio.h>
> #include <stdlib.h>
>
> #include "lua.h"
> #include "lauxlib.h"
>
> #define GLFW_INCLUDE_GLU
> #include "GL/glfw3.h"
>
> int main(int argc, char* argv[]) {
> glfwInit();
> printf("%p\n", glfwInit);
> lua_State* L = luaL_newstate();
> luaL_openlibs(L);
>
> if (argc < 2) {
> fprintf(stderr, "Please enter script to execute\n");
> return 1;
> }
> if (luaL_loadfile(L, argv[1])) {
> fprintf(stderr, "Couldn't load file: %s\n", lua_tostring(L, -1));
> return 1;
> }
>
> if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
> fprintf(stderr, "Failed to run script: %s\n", lua_tostring(L, -1));
> return 1;
> }
>
> lua_close(L);
> return 0;
> }
>
> It compiles just fine. This is my makefile:
>
> app: app.o luajit/src/libluajit.a glfw/src/libglfw3.a
> $(CC) -g app.o luajit/src/libluajit.a glfw/src/libglfw3.a -lX11
> -lGL -lglut -lGLU -lXrandr -lm -ldl -o app
>
> app.o: app.c
> $(CC) -g -c app.c -Iglfw/include -Ilibuv/include -Iluajit/src
>
> luajit/src/luajit.a:
> $(MAKE) -C luajit
>
> glfw/src/libglfw3.a: glfw/Makefile
> $(MAKE) -C glfw src/libglfw3.a
>
> glfw/Makefile:
> cmake glfw
>
> Then my lua script is:
>
> local ffi = require('ffi')
>
> ffi.cdef[[
> int glfwInit(void);
> ]]
>
> ffi.C.glfwInit()
>
> It throws a runtime exception saying "undefined symbol: glfwInit". I
> have no idea what I'm doing wrong. The symbol is clearly there. If I
> check the binary with the nm utility, it's there marked in a "T"
> section.
>
> Can someone shed some light on this issue?
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