Solve bug in backtrace related to macos.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#ifdef(defined(__APPLE__) && defined(__MACH__)) || defined(__MACOSX__)
+ #include <sys/ucontext.h>
+#else
#include <ucontext.h>
+#endif
#include <unistd.h>
/* -- Definitions -- */
