feat(Cmake): Rewrite build and use inherited dependencies (#1652)

deps/mysql/CMakeLists.txt

@@ -0,0 +1,23 @@
+# Copyright (C) 2008-2019 TrinityCore <https://www.trinitycore.org/>
+# Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU AGPL3 v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+#
+# This file is free software; as a special exception the author gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+if (NOT MYSQL_FOUND)
+  message(FATAL_ERROR "MySQL wasn't found on your system but it's required to build the servers!")
+endif()
+
+add_library(mysql STATIC IMPORTED GLOBAL)
+ 
+set_target_properties(mysql
+  PROPERTIES
+    IMPORTED_LOCATION
+      "${MYSQL_LIBRARY}"
+    INTERFACE_INCLUDE_DIRECTORIES
+      "${MYSQL_INCLUDE_DIR}")