is pio working?

[camelator]

I just created a new project following the instructions here: https://crates.io/crates/cargo-pio

my plateform.ini file is the following one, and the compilation fails with this error message: /home/christian/.platformio/packages/toolchain-gccarmnoneeabi/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld: .pio/build/debug/libFrameworkArduino.a(main.cpp.o): in function main': /home/christian/.platformio/packages/framework-arduinoststm32/cores/arduino/main.cpp:52: undefined reference tosetup' /home/christian/.platformio/packages/toolchain-gccarmnoneeabi/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld: /home/christian/.platformio/packages/framework-arduinoststm32/cores/arduino/main.cpp:58: undefined reference to `loop' collect2: error: ld returned 1 exit status *** [.pio/build/debug/firmware.elf] Error 1

but the function is found in file main.cpp and lib.rs:

// // Arduino main stub file. Calls into Rust. //

extern "C" void arduino_setup(); extern "C" void arduino_loop();

void setup() { arduino_setup(); }

void loop() { arduino_loop(); }

lib.rs: // Remove if STD is supported for your platform and you plan to use it

![no_std]

// Remove if STD is supported for your platform and you plan to use it

[panic_handler]

fn panic(_info: &core::panic::PanicInfo) -> ! { loop {} }

// // Entry points //

[no_mangle]

extern "C" fn arduino_setup() { }

[no_mangle]

extern "C" fn arduino_loop() { }

; PlatformIO Project Configuration File ; ; Please visit documentation for options and examples ; https://docs.platformio.org/page/projectconf.html [platformio] default_envs = debug

[env] extra_scripts = pre:platformio.git.py, pre:platformio.patch.py, platformio.cargo.py board = genericSTM32F410C8 platform = ststm32 framework = arduino rust_lib = test_rust rust_target = thumbv7em-none-eabihf

[env:debug] build_type = debug

[env:release] build_type = release

[camelator]

ok... Found the issue: main.cpp is not complete:

include is required at the beginning of the file.

Then compilation works like a charm.

[ivmarkov]

I've added the #include <Arduino.h> statement. The reason why it is necessary is because the Arduino framework for some MCUs have setup/loop defined as "C" functions, while for other frameworks, these are defined as "C++" functions. Hence the linkage errors.