enable Cygwin build again

cmake/ssl.cmake

@@ -30,8 +30,10 @@ MACRO (MYSQL_USE_BUNDLED_SSL)
   #Remove -fno-implicit-templates 
   #(yassl sources cannot  be compiled with  it)
   SET(SAVE_CXX_FLAGS ${CXX_FLAGS})
+  IF(CMAKE_CXX_FLAGS)
   STRING(REPLACE "-fno-implicit-templates" "" CMAKE_CXX_FLAGS 
     ${CMAKE_CXX_FLAGS})
+  ENDIF()
   ADD_SUBDIRECTORY(extra/yassl)
   ADD_SUBDIRECTORY(extra/yassl/taocrypt)
   SET(CXX_FLAGS ${SAVE_CXX_FLAGS})

sql/CMakeLists.txt

@@ -105,8 +105,11 @@ MYSQL_ADD_EXECUTABLE(mysqld ${MYSQLD_SOURCE})
 IF(NOT WITHOUT_DYNAMIC_PLUGINS)
   SET_TARGET_PROPERTIES(mysqld PROPERTIES ENABLE_EXPORTS TRUE)
   GET_TARGET_PROPERTY(mysqld_link_flags mysqld LINK_FLAGS)
+  IF(NOT mysqld_link_flags)
+    SET(mysqld_link_flags)
+  ENDIF()
   IF (MINGW OR CYGWIN)
-    SET_TARGET_PROPERTIES(mysqld PROPERTIES LINK_FLAGS "{mysqld_link_flags} -Wl,--export-all-symbols")
+    SET_TARGET_PROPERTIES(mysqld PROPERTIES LINK_FLAGS "${mysqld_link_flags} -Wl,--export-all-symbols")
   ENDIF()
   IF(MSVC)
     # Set module definition file. Also use non-incremental linker,