herror.c\network\src - musl - musl - an implementation of the standard library for Linux-based systems

#define _GNU_SOURCE
#include <stdio.h>
#include <netdb.h>
void herror(const char *msg)
{
	fprintf(stderr, "%s%s%s\n", msg?msg:"", msg?": ":"", hstrerror(h_errno));
}