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Error~ Undefine Reference

khatereh (41)
Hello,

Following is my framework for my HW, I tried to run before I continue coding and I got the following errors:

/tmp/ccoZ9jjz.o: In function `main':
lab1.cpp:(.text+0x3a): undefined reference to `XNextEvent'
lab1.cpp:(.text+0x7b): undefined reference to `XPending'
/tmp/ccoZ9jjz.o: In function `cleanupXwindows()':
lab1.cpp:(.text+0xb7): undefined reference to `XDestroyWindow'
lab1.cpp:(.text+0xc6): undefined reference to `XCloseDisplay'
/tmp/ccoZ9jjz.o: In function `initXwindows()':
lab1.cpp:(.text+0xda): undefined reference to `XOpenDisplay'
lab1.cpp:(.text+0x185): undefined reference to `XCreateSimpleWindow'
lab1.cpp:(.text+0x1b0): undefined reference to `XCreateGC'
lab1.cpp:(.text+0x1d0): undefined reference to `XMapWindow'
lab1.cpp:(.text+0x1ee): undefined reference to `XSelectInput'
lab1.cpp:(.text+0x20c): undefined reference to `XStoreName'
/tmp/ccoZ9jjz.o: In function `clearScreen()':
lab1.cpp:(.text+0x2ad): undefined reference to `XClearWindow'
/tmp/ccoZ9jjz.o: In function `checkKeys(_XEvent*)':
lab1.cpp:(.text+0x335): undefined reference to `XLookupKeysym'
/tmp/ccoZ9jjz.o: In function `setColor3i(int, int, int)':
lab1.cpp:(.text+0x3d5): undefined reference to `XSetForeground'
/tmp/ccoZ9jjz.o: In function `showCircle()':
lab1.cpp:(.text+0x421): undefined reference to `XDrawPoint'
collect2: error: ld returned 1 exit status


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//Framework for graphics
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <time.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>

//--------------------
//XWindows variables
Display *dpy;
Window win;
GC gc;
//--------------------

struct Global {
	int xres, yres;
	int circleType;
	int done;
	Global() {
		//constructor
		xres=640;
		yres=480;
		circleType=0;
		done=0;
	}
} g;
//-------------------
//function prototypes
void initXwindows();
void cleanupXwindows();
void checkResize(XEvent *e);
void checkMouse(XEvent *e);
void checkKeys(XEvent *e);
void physics();
void render();
void clearScreen();


int main()
{
	srand((unsigned)time(NULL));
	initXwindows();
	while (!g.done) {
		//Check the event queue
		while (XPending(dpy)) {
			//Handle evemts one-by-one
			XEvent e;
			XNextEvent(dpy, &e);
			checkResize(&e);
			checkMouse(&e);
			checkKeys(&e);
			render();
		}
	}
	cleanupXwindows();
	return 0;
}

void cleanupXwindows(void)
{
	XDestroyWindow(dpy, win);
	XCloseDisplay(dpy);
}

void initXwindows(void)
{
	if (!(dpy=XOpenDisplay(NULL))) {
		fprintf(stderr, "ERROR: could not open display\n");
		exit(EXIT_FAILURE);
	}
	int scr = DefaultScreen(dpy);
	win = XCreateSimpleWindow(dpy, RootWindow(dpy, scr), 1, 1,
	                          g.xres, g.yres, 0, 0x00ffffff, 0x00000000);
	gc = XCreateGC(dpy, win, 0, NULL);
	XMapWindow(dpy, win);
	XSelectInput(dpy, win, ExposureMask | StructureNotifyMask |
	                       PointerMotionMask | ButtonPressMask |
	                       ButtonReleaseMask | KeyPressMask |
	                       KeyReleaseMask);
	XStoreName(dpy, win, "CMPS-3480 Lab1 Circles");
}

void checkResize(XEvent *e)
{
	//ConfigureNotify is sent when window size changes.
	if (e->type != ConfigureNotify)
		return;
	XConfigureEvent xce = e->xconfigure;
	g.xres = xce.width;
	g.yres = xce.height;
}

void clearScreen(void)
{
	XClearWindow(dpy, win);
}

void checkMouse(XEvent *e)
{
	static int savex = 0;
	static int savey = 0;
	//
	int mx = e->xbutton.x;
	int my = e->xbutton.y;
	//
	if (e->type == ButtonRelease) {
		return;
	}
	if (e->type == ButtonPress) {
		//Log("ButtonPress %i %i\n", e->xbutton.x, e->xbutton.y);
		if (e->xbutton.button==1) {
			//Left button pressed
		}
		if (e->xbutton.button==3) {
			//Right button pressed
		}
	}
	if (savex != mx || savey != my) {
		//mouse moved
		savex = mx;
		savey = my;
	}
}

void checkKeys(XEvent *e)
{
	if (e->type != KeyPress)
		return;
	//A key was pressed
	int key = XLookupKeysym(&e->xkey, 0);
	switch (key) {
		case XK_a:
			break;
		case XK_equal:
		case XK_minus:
			break;
		case XK_Delete:
			break;
		case XK_Escape:
			//quitting the program
			g.done=1;
			break;
	}
	clearScreen();
}

void physics(void)
{
}

void setColor3i(int r, int g, int b)
{
	unsigned long cref = 0L;
	cref += r;
	cref <<= 8;
	cref += g;
	cref <<= 8;
	cref += b;
	XSetForeground(dpy, gc, cref);
}

void showCircle(void)
{
	//Draw a yellow pixel
	//
	setColor3i(255, 255, 0);
	switch (g.circleType) {
		case 0:
			XDrawPoint(dpy, win, gc, 10, 10);
			break;
	}
}

void render(void)
{
	showCircle();
}
ne555 (10692)
-lX11
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