Bug#25942414: SSL VARIABLES USAGE WHEN LIBMYSQL IS COMPILED WITH WITH_SSL=NO

Description: If libmysql is compiled with WITH_SSL=NO,
             --ssl-* are not useful.

Solution: 1. Restricted WITH_SSL to values : bundled | yes | system
          2. Made "bundled" as default value for WITH_SSL. Also,
             not specifying WITH_SSL or even specifying WITH_SSL=no
             will be treated as/converted to WITH_SSL=bundled.
Reviewed-By: Tor Didriksen <tor.didriksen@oracle.com>
Reviewed-By: Georgi Kodinov <georgi.kodinov@oracle.com>

cmake/build_configurations/mysql_release.cmake

-# Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2010, 2017, Oracle and/or its affiliates. All rights reserved.
 # 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -169,7 +169,6 @@ IF(UNIX)
         SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "+O2 ${COMMON_CXX_FLAGS}")
       ENDIF()
     ENDIF()
-    SET(WITH_SSL no)
   ENDIF()
 
   # Linux flags
@@ -185,7 +184,6 @@ IF(UNIX)
       SET(CMAKE_CXX_FLAGS_DEBUG          "${COMMON_CXX_FLAGS}")
       SET(CMAKE_C_FLAGS_RELWITHDEBINFO   "-O3 -unroll2 -ip ${COMMON_C_FLAGS}")
       SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O3 -unroll2 -ip ${COMMON_CXX_FLAGS}")
-      SET(WITH_SSL no)
     ENDIF()
   ENDIF()
 

cmake/ssl.cmake

-# Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2009, 2017, Oracle and/or its affiliates. All rights reserved.
 # 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -11,10 +11,16 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA 
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+SET(WITH_SSL_DOC "bundled (use yassl)")
+SET(WITH_SSL_DOC
+  "${WITH_SSL_DOC}, yes (prefer os library if present, otherwise use bundled)")
+SET(WITH_SSL_DOC
+  "${WITH_SSL_DOC}, system (use os library)")
 
 MACRO (CHANGE_SSL_SETTINGS string)
-  SET(WITH_SSL ${string} CACHE STRING "Options are : no, bundled, yes (prefer os library if present otherwise use bundled), system (use os library)" FORCE)
+  SET(WITH_SSL ${string} CACHE STRING ${WITH_SSL_DOC} FORCE)
 ENDMACRO()
 
 MACRO (MYSQL_USE_BUNDLED_SSL)
@@ -50,14 +56,12 @@ ENDMACRO()
 # MYSQL_CHECK_SSL
 #
 # Provides the following configure options:
-# WITH_SSL=[yes|no|bundled]
+# WITH_SSL=[bundled|yes|system]
 MACRO (MYSQL_CHECK_SSL)
   IF(NOT WITH_SSL)
-   IF(WIN32)
      CHANGE_SSL_SETTINGS("bundled")
-   ELSE()
-     CHANGE_SSL_SETTINGS("no")
-   ENDIF()
+     MESSAGE(STATUS "Found WITH_SSL set to no. "
+             "Changing it to bundled")
   ENDIF()
 
   IF(WITH_SSL STREQUAL "bundled")
@@ -80,11 +84,12 @@ MACRO (MYSQL_CHECK_SSL)
       CHANGE_SSL_SETTINGS("system")
     ELSE()
       IF(WITH_SSL STREQUAL "system")
-        MESSAGE(SEND_ERROR "Cannot find appropriate system libraries for SSL. Use  WITH_SSL=bundled to enable SSL support")
+        MESSAGE(SEND_ERROR "Cannot find appropriate system libraries for SSL. Use WITH_SSL=bundled to enable SSL support")
       ENDIF()
       MYSQL_USE_BUNDLED_SSL()
     ENDIF()
-  ELSEIF(NOT WITH_SSL STREQUAL "no")
-    MESSAGE(SEND_ERROR "Wrong option for WITH_SSL. Valid values are : yes, no, bundled")
+  ELSE()
+    MESSAGE(SEND_ERROR "Wrong option for WITH_SSL. "
+            "Valid options are : ${WITH_SSL_DOC}")
   ENDIF()
 ENDMACRO()