Do not use fvisibility flag if GCC does not support it

(i.e if gcc version < 4)

cmake/libutils.cmake

@@ -279,12 +279,15 @@ ENDFUNCTION()
 
 MACRO(RESTRICT_SYMBOL_EXPORTS target)
   IF(CMAKE_COMPILER_IS_GNUCXX AND UNIX)
-    GET_TARGET_PROPERTY(COMPILE_FLAGS ${target} COMPILE_FLAGS)
-    IF(NOT COMPILE_FLAGS)
-      # Avoid COMPILE_FLAGS-NOTFOUND
-      SET(COMPILE_FLAGS)
+    CHECK_C_COMPILER_FLAG("-fvisibility=hidden" HAVE_VISIBILITY_HIDDEN)
+    IF(HAVE_VISIBILITY_HIDDEN)
+      GET_TARGET_PROPERTY(COMPILE_FLAGS ${target} COMPILE_FLAGS)
+      IF(NOT COMPILE_FLAGS)
+        # Avoid COMPILE_FLAGS-NOTFOUND
+        SET(COMPILE_FLAGS)
+      ENDIF()
+      SET_TARGET_PROPERTIES(${target} PROPERTIES 
+        COMPILE_FLAGS "${COMPILE_FLAGS} -fvisibility=hidden")
     ENDIF()
-    SET_TARGET_PROPERTIES(${target} PROPERTIES 
-      COMPILE_FLAGS "${COMPILE_FLAGS} -fvisibility=hidden")
   ENDIF()
 ENDMACRO()

configure.in

@@ -25,7 +25,7 @@ AC_CANONICAL_SYSTEM
 #
 # When changing major version number please also check switch statement
 # in client/mysqlbinlog.cc:check_master_version().
-AM_INIT_AUTOMAKE(mysql, 5.5.99)
+AM_INIT_AUTOMAKE(mysql, 5.5.99-m3)
 AM_CONFIG_HEADER([include/config.h:config.h.in])
 
 # Request support for automake silent-rules if available.

libmysqld/CMakeLists.txt

@@ -79,7 +79,7 @@ SET(SQL_EMBEDDED_SOURCES emb_qcache.cc libmysqld.c lib_sql.cc
            ../sql/time.cc ../sql/tztime.cc ../sql/uniques.cc ../sql/unireg.cc
            ../sql/partition_info.cc ../sql/sql_connect.cc 
            ../sql/scheduler.cc ../sql/event_parse_data.cc
-           ../sql/sql_signal.cc ../sql/rpl_handler.cc ../sql/keycaches.cc 
+           ../sql/sql_signal.cc ../sql/rpl_handler.cc 
            ../sql/sys_vars.cc
            ${CMAKE_BINARY_DIR}/sql/sql_builtin.cc
            ${GEN_SOURCES}