Zephyr and using C++ code

[David Elvig]

I'm considering transitioning a product codebase to the nRF family (nRF52 or nRF53).

It's Arduino code, with lots of C++ code.

As in the cpp_synchonization example provided with Zephyr, I can compile code with a C++ class defines in the CPP file.

I cannot when that class is defined in the H file (or HPP).

I get an error

...
TestCPP.hpp:2:1: error: unknown type name 'class'
2 | class foo
...

My whole small project is in a public GitHub repo here

I'm using:

• a MacBook M1
• MacOS 12.5
• VS Code 1.71.2
• Zephyr v2.0.0
• nRF52840_dk

In pro.con I have

CONFIG_CPLUSPLUS=y

Any guidance?

I have many C++ files classes defined in h files (and implemented in cpp files)

Thanks!

[wilu]

main.c file should be renamed to main.cpp to change the compiler to g++ instead of gcc.

Do not add src/TestCPP.hpp as a target source, header files are not compiled.

In main.c file add extern "C" before void main() function.

[David Elvig]

Beautiful!

Fixed with your suggestions.

I needed to also add extern "C" {

...
}

around the prototype in a c header file I was calling.

It all compiles and links!

Source updated here if anyone wants to look.  I'll leave this test repo live for a while.

Thanks!