Hello, I’m running into a linker error with a very basic project using Adafruit Feather M0. I’m running PIO 4.0.0a4. Here’s my code: In src/main.cpp: void setup() { } void loop() { } Then when I build project: Processing adafruit_feather_m0 (platform: atmelsam; board: adafruit_feather_m0; frame…

Heh. Actually what #include <Arduino.h> causes is that setup and loop are declared as extern "C" so they don’t get the C++ name mangling! The startup assembler files reference the functions by the unmangled name. This one also works :slight_smile: extern "C" void setup() { } extern "C" void loop()…

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Linker error with Adafruit Feather M0

vincentl98 March 12, 2019, 12:36pm 3

I forgot them while typing but they aren’t missing in the actual code. Including Arduino.h seems to have solved the issue. Thanks !