CC src/common/compat_libevent.o src/common/compat_libevent.c:234:3: error: implicit declaration of function 'evutil_secure_rng_add_bytes' is invalid in C99 [-Werror,-Wimplicit-function-declaration] evutil_secure_rng_add_bytes(buf, 32); ^ src/common/compat_libevent.c:234:3: note: did you mean 'evutil_secure_rng_get_bytes'? /tmp/include/event2/util.h:808:6: note: 'evutil_secure_rng_get_bytes' declared here void evutil_secure_rng_get_bytes(void *buf, size_t n); ^ src/common/compat_libevent.c:234:3: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes] evutil_secure_rng_add_bytes(buf, 32); ^ 2 errors generated. Makefile:4834: recipe for target 'src/common/compat_libevent.o' failed as of libevent git commit 6541168d7037457b8e5c51cc354f11bd94e618b6, the function evutil_secure_rng_add_bytes() is only exposed for platforms with arc4random_addrandom().