Feature defines moved to <maxscale/cdefs.h>

Feature defines that affect the available functionality or the
compile time environment should be defined in a common way for
all source.

include/maxscale/cdefs.h

@@ -33,6 +33,9 @@
 # define MXS_END_DECLS
 #endif
 
+#define _XOPEN_SOURCE 700
+#define OPENSSL_THREAD_DEFINES
+
 /**
  * Define intended for use with strerror.
  *

server/core/gateway.c

@@ -34,8 +34,8 @@
  * 19/01/16     Markus Makela           Set cwd to log directory
  * @endverbatim
  */
-#define _XOPEN_SOURCE 700
-#define OPENSSL_THREAD_DEFINES
+
+#include <maxscale/cdefs.h>
 #include <my_config.h>
 
 #include <openssl/opensslconf.h>