Previously, this relied on an (ugly, avr-specific) magic default for the compiler.path variable, set by the IDE. This allowed the IDE to fall back to a system-wide toolchain when no bundled toolchain was found (by making compiler.path empty). However, - this only worked for avr, not sam, - this worked only for gcc, a system-wide avrdude would break on the avrdude.conf path in platform.txt, and This would mean that automatic system-wide fallback didn't work in all situations, so you'd still have to modify platform.txt (or create platform.local.txt). Since doing that explictly is the most reliable way, this commit removes the partial-working ability to do this automatically. Note that the code to automatically set compiler.path is still kept around, in case third-party hardware still relies on this. At some point, this code should be removed, but for now it just shows a warning message.
Arduino
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Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The boards can be assembled by hand or purchased preassembled; the open-source IDE can be downloaded for free.
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For more information, see the website at: http://www.arduino.cc/ or the forums at: http://arduino.cc/forum/
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To report a bug in the software or to request a simple enhancement go to: http://github.com/arduino/Arduino/issues
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More complex requests and technical discussion should go on the Arduino Developers mailing list: https://groups.google.com/a/arduino.cc/forum/#!forum/developers
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If you're interested in modifying or extending the Arduino software, we strongly suggest discussing your ideas on the Developers mailing list before starting to work on them. That way you can coordinate with the Arduino Team and others, giving your work a higher chance of being integrated into the official release https://groups.google.com/a/arduino.cc/forum/#!forum/developers
Installation
Detailed instructions are in reference/Guide_Windows.html and reference/Guide_MacOSX.html. For Linux, see the Arduino playground: http://www.arduino.cc/playground/Learning/Linux
Credits
Arduino is an open source project, supported by many.
The Arduino team is composed of Massimo Banzi, David Cuartielles, Tom Igoe, Gianluca Martino, Daniela Antonietti, and David A. Mellis.
Arduino uses the GNU avr-gcc toolchain, avrdude, avr-libc, and code from Processing and Wiring.
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