Hi,
I`ve made fixes in SDK 13.0.0 files described below:
nrf_section.h: to supress gcc warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]
nrf_strerror.h: added C++ support (extern "C" linkage specification)
nfc_ndef_msg.h: to supress gcc error: non-trivial designated initializers not supported
Regards, Anatol