I wrote a C++ library for Arduino. The source code have the following specificities:
- it includes headers, uses functions, macros, and structures/classes (and their methods) from LGPL libraries (Arduino.h from the Arduino Core, Servo.h from the Servo library)
- it uses GCC macros like
__AVR_DEVICE_NAME__. Such macros are also used by the Arduino.h
- it uses linker variables
- it is used for all Arduino boards (AVR, megaAVR, SAMD). So the AVR and ARM toolchains are involved.
I would like to choose a permissive GPL-compatible or LGPL-compatible open-source license such as the Modified BSD license. Is it possible here?
It is unclear to me how GPL and LGPL are restricting my license choice here. Looking at the AVR and ARM toolchains licenses in Atmel Studio folder (AVR8_toolchain_License.txt, ARM_toolchain_License.txt), it appears that they include many libraries like binutils that are either GPL or LGPL (or sometimes both, which is unclear), either 2.0 or 3.0 or both (this is also unclear), and GCC has the GCC Runtime Library Exception. Few libraries are under permissive licenses such as MIT.
Also, it is unclear if including Arduino.h is not including GPL code/libraries behing the scene that would also restrict my choice.