[core] fix compiler warnings on Mac OS X

(thx wardw)

SConstruct

@@ -224,7 +224,8 @@ if 1:
 			getuid select signal pathconf madvise prctl\
 			writev sigaction sendfile64 send_file kqueue port_create localtime_r posix_fadvise issetugid inet_pton \
 			memset_s explicit_bzero clock_gettime pipe2 \
-			getentropy arc4random_buf jrand48 srandom getloadavg'))
+			arc4random_buf jrand48 srandom getloadavg'))
+	checkFunc(autoconf, 'getentropy', 'sys/random.h')
 	checkFunc(autoconf, 'getrandom', 'linux/random.h')
 
 	checkTypes(autoconf, Split('pid_t size_t off_t'))

configure.ac

@@ -863,7 +863,10 @@ AC_CHECK_FUNCS([dup2 getcwd inet_ntoa inet_ntop inet_pton issetugid memset mmap
 		  getuid select signal pathconf madvise posix_fadvise posix_madvise \
 		  writev sigaction sendfile64 send_file kqueue port_create localtime_r gmtime_r \
 		  memset_s explicit_bzero clock_gettime pipe2 \
-		  getentropy arc4random_buf jrand48 srandom getloadavg])
+		  arc4random_buf jrand48 srandom getloadavg])
+AC_CHECK_HEADERS([sys/random.h],[
+  AC_CHECK_FUNC([getentropy], AC_DEFINE([HAVE_GETENTROPY], [1], [getentropy]))
+])
 AC_CHECK_HEADERS([linux/random.h],[
   AC_CHECK_FUNC([getrandom], AC_DEFINE([HAVE_GETRANDOM], [1], [getrandom]))
 ])

src/CMakeLists.txt

@@ -122,6 +122,11 @@ set(CMAKE_EXTRA_INCLUDE_FILES sys/socket.h)
 check_type_size(socklen_t HAVE_SOCKLEN_T)
 set(CMAKE_EXTRA_INCLUDE_FILES)
 
+check_include_files(sys/random.h HAVE_SYS_RANDOM_H)
+set(CMAKE_EXTRA_INCLUDE_FILES sys/random.h)
+check_function_exists(getentropy HAVE_GETENTROPY)
+set(CMAKE_EXTRA_INCLUDE_FILES)
+
 check_include_files(linux/random.h HAVE_LINUX_RANDOM_H)
 set(CMAKE_EXTRA_INCLUDE_FILES linux/random.h)
 check_function_exists(getrandom HAVE_GETRANDOM)
@@ -134,7 +139,6 @@ check_function_exists(arc4random_buf HAVE_ARC4RANDOM_BUF)
 check_function_exists(chroot HAVE_CHROOT)
 check_function_exists(epoll_ctl HAVE_EPOLL_CTL)
 check_function_exists(fork HAVE_FORK)
-check_function_exists(getentropy HAVE_GETENTROPY)
 check_function_exists(getloadavg HAVE_GETLOADAVG)
 check_function_exists(getrlimit HAVE_GETRLIMIT)
 check_function_exists(getuid HAVE_GETUID)

src/fdevent.c

@@ -13,7 +13,9 @@
 #include <errno.h>
 #include <fcntl.h>
 
+#ifdef SOCK_CLOEXEC
 static int use_sock_cloexec;
+#endif
 
 fdevents *fdevent_init(server *srv, size_t maxfds, int type) {
 	fdevents *ev;

src/rand.c

@@ -21,6 +21,9 @@
 #include <openssl/opensslv.h> /* OPENSSL_VERSION_NUMBER */
 #include <openssl/rand.h>
 #endif
+#ifdef HAVE_GETENTROPY
+#include <sys/random.h>
+#endif
 #ifdef HAVE_LINUX_RANDOM_H
 #include <sys/syscall.h>
 #include <linux/random.h>