Hi!
Here are two working 
projects
-
Arduino-1: very basic
-
Arduino-3: with a class for the LED
and one non-working 
project
- Arduino-4: the LED class is on a library
I'm sure it's something trivial :~ but I can't find it.
/usr/local/CrossPack-AVR/bin//avr-gcc -mmcu=atmega328p -I. -gstabs -DF_CPU=16000000L -I/Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino -Os -Wall -Wstrict-prototypes -std=gnu99 -o main.elf main.cpp -L. core.a -lm
cc1plus: warning: command line option "-Wstrict-prototypes" is valid for C/ObjC but not for C++
cc1plus: warning: command line option "-std=gnu99" is valid for C/ObjC but not for C++
/var/folders/gA/gAXpDd7ZEBG06Owk-4lV4++++TI/-Tmp-//cc1xTugb.o: In function `global constructors keyed to myLed':
main.cpp:9: undefined reference to `LED::LED()'
/var/folders/gA/gAXpDd7ZEBG06Owk-4lV4++++TI/-Tmp-//cc1xTugb.o: In function `loop':
main.cpp:31: undefined reference to `LED::blink(int, int)'
/var/folders/gA/gAXpDd7ZEBG06Owk-4lV4++++TI/-Tmp-//cc1xTugb.o: In function `setup':
main.cpp:18: undefined reference to `LED::begin(int)'
main.cpp:24: undefined reference to `LED::on()'
make: *** [main.elf] Error 1
Warning! Before compiling, always launch Build > Clean or Shift-Command-K.
Any idea? Thank you for your help!
Arduino-1.zip (40 KB)
Arduino-3.zip (23.9 KB)
Arduino-4.zip (26.2 KB)