fix define mismatch
@@ -225,7 +225,7 @@ elseif (CMAKE_SYSTEM_NAME MATCHES "Darwin")
add_definitions (-DNNG_PLATFORM_DARWIN)
# macOS 10.12 and later have getentropy, but the older releases
# have ARC4_RANDOM, and that is sufficient to our needs.
- add_definitions (-DNNG_USE_ARC4_RANDOM)
+ add_definitions (-DNNG_USE_ARC4RANDOM)
# macOS added some of CLOCK_MONOTONIC, but the implementation is
# broken and unreliable, so don't use it.
