Detect and handle OpenSSL 1.1

OpenSSL 1.1 supports most of the native threading libraries, including
pthread. This means that only versions before 1.1 need the thread handling
code.

CMakeLists.txt

@@ -78,8 +78,10 @@ if(NOT OPENSSL_FOUND)
 else()
   if(OPENSSL_VERSION VERSION_LESS 1 AND NOT FORCE_OPENSSL100)
     add_definitions("-DOPENSSL_0_9")
-  else()
+  elseif(OPENSSL_VERSION VERSION_LESS 1.1)
     add_definitions("-DOPENSSL_1_0")
+  else()
+    add_definitions("-DOPENSSL_1_1")
   endif()
 endif()
 

server/core/gateway.cc

@@ -203,6 +203,7 @@ const DEBUG_ARGUMENT debug_arguments[] =
     {NULL, NULL, NULL}
 };
 
+#ifndef OPENSSL_1_1
 /** SSL multi-threading functions and structures */
 
 static SPINLOCK* ssl_locks;
@@ -284,6 +285,7 @@ static void maxscale_ssl_id(CRYPTO_THREADID* id)
     CRYPTO_THREADID_set_numeric(id, pthread_self());
 }
 #endif
+#endif
 
 /**
  * Handler for SIGHUP signal. Reload the configuration for the
@@ -1734,6 +1736,7 @@ int main(int argc, char **argv)
     SSL_load_error_strings();
     OPENSSL_add_all_algorithms_noconf();
 
+#ifndef OPENSSL_1_1
     numlocks = CRYPTO_num_locks();
     if ((ssl_locks = (SPINLOCK*)MXS_MALLOC(sizeof(SPINLOCK) * (numlocks + 1))) == NULL)
     {
@@ -1753,6 +1756,7 @@ int main(int argc, char **argv)
     CRYPTO_THREADID_set_callback(maxscale_ssl_id);
 #else
     CRYPTO_set_id_callback(pthread_self);
+#endif
 #endif
 
     /**