fixes for non-debug builds (CMAKE_BUILD_TYPE=Release or RelWithDebInfo)

client/CMakeLists.txt:
  1. -rdynamic is a linker flag.
  2. it should be used in all builds, not debug only
libmysql/get_password.c:
  prefer a standard function, when possible
  (otherwise a plugin will need to load it from the client)

client/CMakeLists.txt

@@ -31,7 +31,7 @@ MYSQL_ADD_EXECUTABLE(mysql completion_hash.cc mysql.cc readline.cc
 TARGET_LINK_LIBRARIES(mysql mysqlclient)
 IF(UNIX)
   TARGET_LINK_LIBRARIES(mysql ${MY_READLINE_LIBRARY})
-  SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -rdynamic")
+  SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -rdynamic")
 ENDIF(UNIX)
 
 MYSQL_ADD_EXECUTABLE(mysqltest mysqltest.cc COMPONENT Test)

libmysql/get_password.c

@@ -157,7 +157,7 @@ void get_tty_password_buff(const char *opt_message, char *buff, size_t buflen)
   passbuff = getpass(opt_message ? opt_message : "Enter password: ");
 
   /* copy the password to buff and clear original (static) buffer */
-  strnmov(buff, passbuff, buflen - 1);
+  strncpy(buff, passbuff, buflen - 1);
 #ifdef _PASSWORD_LEN
   memset(passbuff, 0, _PASSWORD_LEN);
 #endif

sql/sql_partition.cc

@@ -7348,7 +7348,7 @@ int get_part_iter_for_interval_cols_via_map(partition_info *part_info,
                                             PARTITION_ITERATOR *part_iter)
 {
   uint32 nparts;
-  get_col_endpoint_func  get_col_endpoint;
+  get_col_endpoint_func  UNINIT_VAR(get_col_endpoint);
   DBUG_ENTER("get_part_iter_for_interval_cols_via_map");
 
   if (part_info->part_type == RANGE_PARTITION)

sql/sql_trigger.cc

@@ -1722,7 +1722,7 @@ bool add_table_for_trigger(THD *thd,
   LEX *lex= thd->lex;
   char trn_path_buff[FN_REFLEN];
   LEX_STRING trn_path= { trn_path_buff, 0 };
-  LEX_STRING tbl_name;
+  LEX_STRING tbl_name= null_lex_str;
 
   DBUG_ENTER("add_table_for_trigger");
 

vio/viosocket.c

@@ -692,9 +692,7 @@ my_bool vio_is_connected(Vio *vio)
 void vio_timeout(Vio *vio, uint which, uint timeout)
 {
 #if defined(SO_SNDTIMEO) && defined(SO_RCVTIMEO)
-#ifndef DBUG_OFF
   int r;
-#endif
   DBUG_ENTER("vio_timeout");
 
   {