error in running a demo called bounce.c in chipmunk - chipmunk

Question

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "/home/satyajit/Chipmunk-5.2.0/include/chipmunk/chipmunk.h"
#include "drawSpace.h"
#include "ChipmunkDemo.h"
cpSpace *space;
cpBody *staticBody;
int i;
static void
update(int ticks)
{
int steps = 3;
cpFloat dt = 1.0f/60.0f/(cpFloat)steps;
for( i=0; i<steps; i++)
{
cpSpaceStep(space, dt);
}
}
static void
add_box()
{
const cpFloat size = 10.0f;
const cpFloat mass = 1.0f;
cpVect verts[] = {
cpv(-size,-size),
cpv(-size, size),
cpv( size, size),
cpv( size,-size),
};
cpFloat radius = cpvlength(cpv(size, size));
cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForPoly(mass, 4, verts, cpvzero)));
body->p = cpv(frand()*(640 - 2*radius) - (320 - radius), frand()*(480 - 2*radius) - (240 - radius));
body->v = cpvmult(cpv(2*frand() - 1, 2*frand() - 1), 200);
cpShape *shape = cpSpaceAddShape(space, cpPolyShapeNew(body, 4, verts, cpvzero));
shape->e = 1.0f; shape->u = 0.0f;
}
static cpSpace *
init(void)
{
staticBody = cpBodyNew(INFINITY, INFINITY);
cpResetShapeIdCounter();
space = cpSpaceNew();
cpSpaceResizeActiveHash(space, 30.0f, 1000);
space->iterations = 10;
cpShape *shape;
// Create segments around the edge of the screen.
shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(-320,240), 0.0f));
shape->e = 1.0f; shape->u = 1.0f;
shape->layers = NOT_GRABABLE_MASK;
shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(320,-240), cpv(320,240), 0.0f));
shape->e = 1.0f; shape->u = 1.0f;
shape->layers = NOT_GRABABLE_MASK;
shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(320,-240), 0.0f));
shape->e = 1.0f; shape->u = 1.0f;
shape->layers = NOT_GRABABLE_MASK;
shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(-320,240), cpv(320,240), 0.0f));
shape->e = 1.0f; shape->u = 1.0f;
shape->layers = NOT_GRABABLE_MASK;
for(i=0; i<10; i++)
add_box();
cpBody *body = cpSpaceAddBody(space, cpBodyNew(100.0f, 10000.0f));
shape = cpSpaceAddShape(space, cpSegmentShapeNew(body, cpv(-75,0), cpv(75,0), 5.0f));
shape->e = 1.0f; shape->u = 1.0f;
cpSpaceAddConstraint(space, cpPivotJointNew2(body, staticBody, cpvzero, cpvzero));
return space;
}
static void
destroy(void)
{
cpBodyFree(staticBody);
cpSpaceFreeChildren(space);
cpSpaceFree(space);
}
const chipmunkDemo Bounce = {
"Bounce",
NULL,
init,
update,
destroy,
};
This is the code . The error i get when i run it is .
/usr/lib/gcc/i486-linux-gnu/4.3.2/../../../../lib/crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'
/tmp/ccyG1FXX.o: In function `update':
Bounce.c:(.text+0x37): undefined reference to `cpSpaceStep'
/tmp/ccyG1FXX.o: In function `add_box':
Bounce.c:(.text+0x18f): undefined reference to `cpvlength'
Bounce.c:(.text+0x1d3): undefined reference to `cpMomentForPoly'
Bounce.c:(.text+0x1e2): undefined reference to `cpBodyNew'
Bounce.c:(.text+0x1f4): undefined reference to `cpSpaceAddBody'
Bounce.c:(.text+0x368): undefined reference to `cpPolyShapeNew'
Bounce.c:(.text+0x37a): undefined reference to `cpSpaceAddShape'
/tmp/ccyG1FXX.o: In function `init':
Bounce.c:(.text+0x45c): undefined reference to `cpBodyNew'
Bounce.c:(.text+0x466): undefined reference to `cpResetShapeIdCounter'
Bounce.c:(.text+0x46b): undefined reference to `cpSpaceNew'
Bounce.c:(.text+0x48f): undefined reference to `cpSpaceResizeActiveHash'
Bounce.c:(.text+0x548): undefined reference to `cpSegmentShapeNew'
Bounce.c:(.text+0x55a): undefined reference to `cpSpaceAddStaticShape'
Bounce.c:(.text+0x610): undefined reference to `cpSegmentShapeNew'
Bounce.c:(.text+0x622): undefined reference to `cpSpaceAddStaticShape'
Bounce.c:(.text+0x6cf): undefined reference to `cpSegmentShapeNew'
Bounce.c:(.text+0x6e1): undefined reference to `cpSpaceAddStaticShape'
Bounce.c:(.text+0x78e): undefined reference to `cpSegmentShapeNew'
Bounce.c:(.text+0x7a0): undefined reference to `cpSpaceAddStaticShape'
Bounce.c:(.text+0x7fd): undefined reference to `cpBodyNew'
Bounce.c:(.text+0x80f): undefined reference to `cpSpaceAddBody'
Bounce.c:(.text+0x89b): undefined reference to `cpSegmentShapeNew'
Bounce.c:(.text+0x8ad): undefined reference to `cpSpaceAddShape'
Bounce.c:(.text+0x91d): undefined reference to `cpPivotJointNew2'
Bounce.c:(.text+0x92f): undefined reference to `cpSpaceAddConstraint'
/tmp/ccyG1FXX.o: In function `destroy':
Bounce.c:(.text+0x949): undefined reference to `cpBodyFree'
Bounce.c:(.text+0x956): undefined reference to `cpSpaceFreeChildren'
Bounce.c:(.text+0x963): undefined reference to `cpSpaceFree'
collect2: ld returned 1 exit status

Answer 1

You need to update your header search path.