C++ Support Issue in nRF connect SDk issue

[hiteshk014]

Hi,

We are facing some issues in merging c++ file in nCS 1.7.0

we are adding main.cpp in a project and we are copyig everything in main.c and executing the following modifications done in project

1. In "C Library Implementation section" --> Enabled "Newlib C library"
2. In "Sub Systems and OS Services section" --> Enabled "C++ support for the application"
3. In "project build.emProject" (opening in text editor) we're adding desired includes in the main.cpp file we add just as below:
<file file_name="main.cpp">
<configuration
Name="Common"
c_only_additional_options=
c_preprocessor_definitions=
c_system_include_directories=
c_user_include_directories=
code_completion_options=
cpp_only_additional_options=

but we get an error of "bluetooth/bluetooth.h: No such file or directory" it is not picking up .h include, we're excluding main.c from build as we have added main.cpp in project and copied same include directories of main.c in main.cpp in "project build.emProject" file
can you please suggest us if there is anything we can do in merging this cpp file

[ovrebekk]

Hi 

One thing to note if you want to use C++ with the nRF Connect SDK is that not all libraries support C++ fully, including bluetooth.h which uses some struct initializers that the C++ compiler does not support. 

In order to use C++ with these libraries you need to have a separate C file that interfaces the library directly, and then access this C file from your C++ files. 

To illustrate this I made a quick modification to the peripheral_hr example where I moved all the Bluetooth functionality into a separate C file, and implemented a small class in main.cpp to access it:

277456_peripheral_hr_cpp.zip

All I changed in the configuration was to include the CONFIG_CPLUSPLUS=y configuration in prj.conf

I didn't uses Segger Embedded Studio (SES) to write this code, but you should be able to import the project in SES if you want. 

Best regards
Torbjørn

[ulyssis]

thanks for the sample.

As of Jan 2024, we have to adapt the includes at some places due to contuning development of the libraries.
fatal error: zephyr.h: No such file or directory - Developing Bluetooth Low Energy products using nRF Connect SDK - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)

in my case I also need to change the return type of the main function from void to int.