c++ projects in IDF?

[jimcondit]

Is there an easy way to create a new cpp project in the idf? I'm trying to migrate a sketch from Android IDE, which is generally working there, to IDF. I can see some reference to using the naming convention "main/main.cpp" and changes to the make files, but I can't make it work. Any documentation?

[silardgal_dotlab]

Just use

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extern "C" void app_main()

and rename your main.c to main.cpp

[StuartLittle57]

app_main() is called by C code. If you compile your main file as cpp this function name will be mangled. The solution is to define app_main as extern "C" so it can be called from C. That's all. We use C++ in all our projects.

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extern "C" void app_main(void)
{
}

Just note that exceptions are disabled by default. You can enable them in menuconfig.
Also if you want to use modern C++ features you can set C++ version to C++17 in CMakeLists.txt:

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set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)