Inheritance: error in calling the constructor of the base class?

i want write library rgbdigit shield (http://rgbdigit.com/), adafruit neopixel strip, packed 7 segment display. shield has ds3231 clock , ir receiver.

so plan make class rgbdigit, inherits adafruit_neopixel class , add private members ds3231 , irrecv.

this rgbdigit.h:

code: [select]


#ifndef rgbdigit_h
#define rgbdigit_h

#include <arduino.h>
#include "wire.h"
#include "../adafruit_neopixel/adafruit_neopixel.h"
#include "../irremote/irremote.h"
#include "../ds3231/ds3231.h"

class rgbdigit : public adafruit_neopixel {
  public:
    rgbdigit(int ndigits);
    ~rgbdigit();
  private:
    int _ndigits;
    ds3231 _clock;
    irrecv* _ir;
};

#endif


this rgbdigit.cpp:

code: [select]


#include "rgbdigit.h"


rgbdigit::rgbdigit(int ndigits)
  : adafruit_neopixel(8 * ndigits, 12, neo_grb + neo_khz800),
  _ndigits(ndigits)
{
  _ir = new irrecv(10);
  _ir->enableirin(); // start receiver
  adafruit_neopixel::begin();
}

rgbdigit::~rgbdigit()
{
  delete _ir;
}



and arduino sketch:

code: [select]


#include <wire.h>
#include <rgbdigit.h>

rgbdigit display = rgbdigit(4);

void setup() {
  // put setup code here, run once:

}

void loop() {
  // put main code here, run repeatedly:

}


i al lot of "undefined reference" errors:

code: [select]


rgbdigit/rgbdigit.cpp.o: in function `rgbdigit::rgbdigit(int)':
/home/ralph/arduino/libraries/rgbdigit/rgbdigit.cpp:23: undefined reference `adafruit_neopixel::adafruit_neopixel(unsigned int, unsigned char, unsigned char)'
/home/ralph/arduino/libraries/rgbdigit/rgbdigit.cpp:23: undefined reference `ds3231::ds3231()'
/home/ralph/arduino/libraries/rgbdigit/rgbdigit.cpp:25: undefined reference `irrecv::irrecv(int)'
/home/ralph/arduino/libraries/rgbdigit/rgbdigit.cpp:26: undefined reference `irrecv::enableirin()'
/home/ralph/arduino/libraries/rgbdigit/rgbdigit.cpp:27: undefined reference `adafruit_neopixel::begin()'
rgbdigit/rgbdigit.cpp.o: in function `rgbdigit::~rgbdigit()':
/home/ralph/arduino/libraries/rgbdigit/rgbdigit.cpp:30: undefined reference `adafruit_neopixel::~adafruit_neopixel()'
collect2: error: ld returned 1 exit status


but don' t understand why. doing wrong?

rgbdigit.h

code: [select]

#include "../adafruit_neopixel/adafruit_neopixel.h"
#include "../irremote/irremote.h"
#include "../ds3231/ds3231.h"

change these to

code: [select]

#include <adafruit_neopixel.h>
#include <irremote.h>
#include <ds3231.h>
and add them sketch, too.

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