libutouch-geis C++ problems

Hi

I'm interesting in develop an aplication in C++ using utouch to get ALL gestures (I see that Qt support only get gestures doing in a widget, I need to get all gestures), I suposse that libutouch-geis provides acces to all gestures.

I only found this documentation:
http://people.canonical.com/~cndougla/geis-1.0/index.html

Well, I have a very very basic problem with geis, I'm trying to get gestures:

#include <geis/geis.h>

static void gestureAdded(void* cookie, GeisGestureType gesture_type,
        GeisGestureId gesture_id, GeisSize attr_count, GeisGestureAttr* attrs) {
}

static void gestureRemoved(void* cookie, GeisGestureType gesture_type,
        GeisGestureId gesture_id, GeisSize attr_count, GeisGestureAttr* attrs) {
}

static void gestureStart(void* cookie, GeisGestureType gesture_type,
        GeisGestureId gesture_id, GeisSize attr_count, GeisGestureAttr* attrs) {
}

static void gestureUpdate(void* cookie, GeisGestureType gesture_type,
        GeisGestureId gesture_id, GeisSize attr_count, GeisGestureAttr* attrs) {
}

static void gestureFinish(void* cookie, GeisGestureType gesture_type,
        GeisGestureId gesture_id, GeisSize attr_count, GeisGestureAttr* attrs) {
}

int main() {

    GeisInstance instance;
    GeisWinInfo winInfo;

    GeisXcbWinInfo xcbWinInfo;
    xcbWinInfo.display_name = NULL;
    xcbWinInfo.screenp = NULL;
    xcbWinInfo.window_id = 0; // What ID to recibe ALL gestures??

    winInfo.win_type = GEIS_XCB_FULL_WINDOW;
    winInfo.win_info = &xcbWinInfo;

    // Init geis
    if(geis_init(&winInfo, &instance) != GEIS_STATUS_SUCCESS)
        return -1;

    // Subcribe to gestures
    GeisGestureFuncs gestureFuncs = {
      gestureAdded,
      gestureRemoved,
      gestureStart,
      gestureUpdate,
      gestureFinish
    };

    if(geis_subscribe(instance, GEIS_ALL_INPUT_DEVICES, GEIS_ALL_GESTURES,
            &gestureFuncs, NULL) != GEIS_STATUS_SUCCESS)
        return -1;

    for(;;) {
        // How to read gestures??
    }

    geis_finish(instance);

    return 0;
}

Trying to compile:
$ g++ Main.cpp -lutouch-geis
/tmp/cctT1OgH.o: In function `main':
Main.cpp:(.text+0xa9): undefined reference to `geis_init(GeisWinInfo*, _GeisInstance**)'
Main.cpp:(.text+0x10d): undefined reference to `geis_subscribe(_GeisInstance*, unsigned int*, char const**, GeisGestureFuncs*, void*)'
collect2: ld returned 1 exit status

Ok... questions ;)

(1) Why don't compile?
(2) Is posible to get ALL gestures? If is posible... How?
(3) Some documentation or examples about geis please?

Thanks!