RE: Makefile: Compiling C++

mbards — Thu, 02 May 2019 16:40:12 GMT

Many libraries have extern "C" baked into each header file (ex: stm, tensorflow, 1). Purely out of curiosity, why did Nordic choose not to do this?

#ifdef __cplusplus
 extern "C" {
#endif

...code...

#ifdef __cplusplus
 }
#endif

To wrap up the question "how do I adjust the SDK makefile so it compiles C++" the answer is, you don't have to do anything. If you add a .cpp file to the SRC_FILES list it compiles fine. Just wrap any C includes in extern "C". For example, in main.cpp:

extern "C" {
#include "nrf_pwr_mgmt.h"
}

Thanks for your response Hakon

RE: Makefile: Compiling C++

Hakon — Mon, 29 Apr 2019 09:26:33 GMT

[quote user=""]I can remove this error by adding extern "C" before the declaration of nrf_pwr_mgmt_run() but that's hacky.[/quote]

That's because the nrf_pwr_mgmt_run() is a function from a library written in C that you refer to in a C++ file. That's how you're supposed to handle C code in a C++ project. Look at https://isocpp.org/wiki/faq/mixing-c-and-cpp.

[quote user=""]but if there is an easier way please let me know[/quote]

Not as far as I know.