A problem with Zephyr, C++, and string

[Chris Pearson]

I'm having a problem with what should be a very simple exercise. I'm trying to compile the Zephyr sample subsys/cpp/cpp_synchronization after adding #include <string> to the main.cpp. This generates the error: fatal error: string: No such file or directory

My Linux system is set up as described in the nRF Connect manual setup instructions. Builds of cpp_synchronization and other Zephyr examples, as well as my own code, work correctly. 

Is there something special that needs to be done to include standard libraries (string, at least) in a Zephyr project? 

[Einar Thorsrud]

Hi,

You should add a few configs in prj.conf:

CONFIG_CPLUSPLUS=y
CONFIG_LIB_CPLUSPLUS=y
CONFIG_NEWLIB_LIBC=y

[Chris Pearson]

Aha!  Thank you -- that was what is missing. Unfortunately the Zephyr documentation tends to be rather sparse...