# define MAC_OS_X_VERSION_10_12 101200
# endif
constexpr bool HAVE_WORKING_MMAP = (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_12);
-#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__sun)
constexpr bool HAVE_WORKING_MMAP = false;
#else
constexpr bool HAVE_WORKING_MMAP = true;