"collect2: error: ld returned 1 exit status" on Codeblocks (Raspberry Pi 3b/GCC 5.4.0) - codeblocks

Question

Currently I'm learning how to create games (at a low level) at my degree. I'm programming on Ubuntu mate 16.04, Codeblocks 13.12 and this happen:
-------------- Build: Debug in s04 (compiler: GNU GCC Compiler)---------------
g++ -o bin/Debug/s04 obj/Debug/main.o obj/Debug/Pantalla.o
obj/Debug/main.o: file not recognized: File format not recognized
collect2: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 0 second(s))
0 error(s), 0 warning(s) (0 minute(s), 0 second(s))
I must create a new window where my "game" will run... (I add code)
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "Pantalla.h"
//Ej.1
struct BalaRep
{
int x;
int y;
int vx;
int vy;
};
typedef struct BalaRep * Bala;
//Ej.2
Bala crea_bala ( double x, double y, double vx, double vy )
{
Bala b=malloc(sizeof(struct BalaRep));
b->x = x;
b->y = y;
b->vx = vx;
b->vy = vy;
return b;
}
//Ej.3
void libera_bala( Bala b )
{
free(b);
}
//Ej.4
void mueve_bala( Bala b )
{
b->x = (b->x)+ (b->vx);
b->y = (b->y)+ (b->vy);
}
//Ej.5
void dibuja_bala( Bala b )
{
Pantalla_DibujaRectangulo( b->x, b->y, 7, 7);
}
//Ej.6
/*
double get_x_bala( Bala b )
{
return b->x;
}
*/
//Ej.7
/*
double get_y_bala( Bala b )
{
return b->y;
}
*/
int main( int argc, char *argv[] )
{
Pantalla_Crea("Ejemplo 3", 640,480);
Pantalla_ColorTrazo(255,0,0, 255);
int x = 280;
int y = 425;
int x2 = 200;
int y2 = 100;
int vx2 = 5;
Bala b = NULL;
while ( Pantalla_Activa() )
{
//Crear bala
if (Pantalla_TeclaPulsada(SDL_SCANCODE_SPACE))
{
libera_bala(b);
b=NULL;
b=crea_bala(x,y,0,-10);
}
//Movimiento del rectángulo
if (Pantalla_TeclaPulsada(SDL_SCANCODE_RIGHT))
{
x = x + 5;
}
if (Pantalla_TeclaPulsada(SDL_SCANCODE_LEFT))
{
x = x - 5;
}
/*if (Pantalla_TeclaPulsada(SDL_SCANCODE_UP))
{
y = y - 5;
}
if (Pantalla_TeclaPulsada(SDL_SCANCODE_DOWN))
{
y = y + 5;
}*/
//Bordes no-salir
if (x > 640-80)
{
x = 640 - 80;
}
if (x < 0)
{
x = 0;
}
if (y > 480-40)
{
y = 480 - 40;
}
if (y < 0)
{
y = 0;
}
//Mov enemigo
x2 = x2 + vx2;
//Bordes no-salir enemigo
if (x2 > 640-80)
{
x2 = 640 - 80;
vx2 = vx2 * (-1);
}
if (x2 < 0)
{
x2 = 0;
vx2 = vx2 * (-1);
}
//BALA
if (b!=NULL)
{
mueve_bala(b);
}
if ((b!=NULL) && ((b->y) <= 0))
{
libera_bala(b);
b=NULL;
}
Pantalla_DibujaRellenoFondo( 255,255,255, 255 );
Pantalla_DibujaRectangulo( x, y, 80,40 );
Pantalla_DibujaRectangulo( x2, y2, 80,40 );
if (b!=NULL)
{
dibuja_bala(b);
}
Pantalla_Actualiza();
Pantalla_Espera(40);
}
Pantalla_Libera();
return 0;
}
There is a file that teachers give us to run it properly. Furthermore, my classmate run the same code (what I add) on his laptop and it works. Excuse me, I know my English is bad...

Answer 1

Obviously the object files are incompatible either because your build process is broken or if your professor just gives you the compiled object file, because it is not ABI compatible with your implementation i.e. compiler, OS, architecture.