Topic: WOLFMQTT_NONBLOCK includes sys/errno.h
I am trying to understand design of the wolfmqtt library.
When i define WOLFMQTT_NONBLOCK, the library includes the <sys/errno.h>.
I am running on an arm clang compiler + KEIL environment. This compiler has the errno.h definition in the cpplibx/errno.h, not in the sys directory as gcc does.