Arduino-0022 & 23 with Ubuntu 12.04

[thingevery]

If you're using Ubuntu 12.04 and trying to compile Marlin firmware using Arduino-0022 or 23, you may get an error like this:

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In file included from /usr/lib/gcc/avr/4.5.3/../../../avr/include/util/delay.h:44:0,
                 from /usr/lib/gcc/avr/4.5.3/../../../avr/include/avr/delay.h:37,
                 from /home/defect/Downloads/arduino-0023/hardware/arduino/cores/arduino/wiring_private.h:30,
                 from /home/defect/Downloads/arduino-0023/hardware/arduino/cores/arduino/WInterrupts.c:34:
/usr/lib/gcc/avr/4.5.3/../../../avr/include/math.h:427:15: error: expected identifier or '(' before 'double'
/usr/lib/gcc/avr/4.5.3/../../../avr/include/math.h:427:15: error: expected ')‚' before '>=' token

To fix this, you'll need to make a small change to a file on your system. Here's how:

• 1. Open a new Terminal window.
  2. Open the file in gedit.

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  sudo gedit /usr/lib/avr/include/math.h

  3. Enter your password.
  4. Scroll down to line 427 or so, and add the line:

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  #undef round

  so it looks like:

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  #undef round
  extern double round (double __x) __ATTR_CONST__;
  #define roundf round...

  5. Save and close the file. Arduino should now compile without error.

I found this solution here: http://www.freesoftwaretalk.org/en/10-o ... rce/nanode.

This held me up for 2 days. Hopefully you found it quicker.