linking errors in cygwin

[Grimfate126]

hi. im getting an annoying error in cygwin. i have 2 main files: main.cpp and main.h. here is my main.h:

// Includes
#include <malloc.h>		//For memalign()
#include <pspkernel.h>
#include <pspdisplay.h>
#include <pspctrl.h>
#include <pspdebug.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <png.h>
#include <psppower.h>
#include <psptypes.h>
 
//**************************************************************************

// Exit callback
int exit_callback(int arg1, int arg2, void *common) {
          sceKernelExitGame();
          return 0;
}
// Callback thread 
int CallbackThread(SceSize args, void *argp) {
          int cbid;
 
          cbid = sceKernelCreateCallback("Exit Callback", exit_callback, NULL);
          sceKernelRegisterExitCallback(cbid);
 
          sceKernelSleepThreadCB();
 
          return 0;
}
// Sets up the callback thread and returns its thread id
int SetupCallbacks(void) {
          int thid = 0;
 
          thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, 0, 0);
          if(thid >= 0) {
                    sceKernelStartThread(thid, 0, 0);
          }
 
          return thid;
}

#include <pspgu.h>
#include <pspgum.h>
#include <psprtc.h>	

#include "graphics.h"
#include "ModelMD2.h"

#define BUF_WIDTH (512)
#define SCR_WIDTH (480)
#define SCR_HEIGHT (272)

#define printf pspDebugScreenPrintf
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
#define RGB(r, g, b) ((r)|((g)<<8)|((b)<<16))
#define PI 3.14159265

typedef struct {
	unsigned int color;
	float x, y, z;
} Vertex;

void InitGU( void );			        // Initialize the Graphics Subsystem
void SetupProjection( void );	                // Setups the Projection Matrix
void DrawScene( void );			        // Render Geometry

and my main.cpp is my main code. BUT, when i try to use any of the functions in the file "ModelMD2.h", or if i use any functions from "graphics.h" cygwin gives me linking errors:

main.cpp:(.text+0x378): undefined reference to `MD2RenderModel(_MODELMD2*)'
main.o: In function `main':
main.cpp:(.text+0x8a0): undefined reference to `MD2AllocateModel(int)'
main.cpp:(.text+0x8bc): undefined reference to `MD2LoadModel(_MODELMD2*, char*,
int)'
main.cpp:(.text+0x8d8): undefined reference to `MD2LoadModel(_MODELMD2*, char*,
int)'
main.cpp:(.text+0x8e8): undefined reference to `MD2ChangeAnimation(_MODELMD2*, i
nt, int)'
collect2: ld returned 1 exit status
make: *** [aso.elf] Error 1

i have declared the functions, so i dont know why cygwin is giving me this error. i asked nexis, and he couldnt "solve" it either. (we spent like 1 hour trying to get this to work. ) so, whats wrong with my code??


P.S. its not cygwin, cause 1 other person tried it and got the same results.

[Insert_Witty_Name]

extern "C" {
#include "graphics.h"
#include "ModelMD2.h"
}

[Grimfate126]

Originally Posted by Insomniac197

extern "C" {
#include "graphics.h"
#include "ModelMD2.h"
}

does that do in main.h? cause it still wont work. my main.h:

// Includes
#include <malloc.h>		//For memalign()
#include <pspkernel.h>
#include <pspdisplay.h>
#include <pspdebug.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <png.h>
#include <psppower.h>
#include <psptypes.h>
 
#include <pspgu.h>
#include <pspgum.h>
#include <pspctrl.h>

extern "C" {
#include "graphics.h"
#include "ModelMD2.h"
}

//**************************************************************************

// Exit callback
int exit_callback(int arg1, int arg2, void *common) {
          sceKernelExitGame();
          return 0;
}
// Callback thread 
int CallbackThread(SceSize args, void *argp) {
          int cbid;
 
          cbid = sceKernelCreateCallback("Exit Callback", exit_callback, NULL);
          sceKernelRegisterExitCallback(cbid);
 
          sceKernelSleepThreadCB();
 
          return 0;
}
// Sets up the callback thread and returns its thread id
int SetupCallbacks(void) {
          int thid = 0;
 
          thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, 0, 0);
          if(thid >= 0) {
                    sceKernelStartThread(thid, 0, 0);
          }
 
          return thid;
}


#define BUF_WIDTH (512)
#define SCR_WIDTH (480)
#define SCR_HEIGHT (272)

#define printf pspDebugScreenPrintf
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
#define RGB(r, g, b) ((r)|((g)<<8)|((b)<<16))
#define PI 3.14159265

typedef struct {
	unsigned int color;
	float x, y, z;
} Vertex;

void InitGU( void );			        // Initialize the Graphics Subsystem
void SetupProjection( void );	                // Setups the Projection Matrix
void DrawScene( void );			        // Render Geometry

[Insert_Witty_Name]

You do have graphics.o, framebuffer.o and ModelMD2.o in the OBJS line of your makefile as well?

I assumed the name of the ModelMD2.o - you will need to add all the C files associated with the MD2 files to your OBJS line.

[Grimfate126]

nvm, i fixed it. no idea how, just copied anotehr file over, and now it works. weird.