Fixed some compiler warnings

include/m_ctype.h:
  MY_UNICASE_INFO already includes 'const'
plugin/auth/dialog.c:
  Fixed parameters to have correct signed/unsigned type
sql/sql_acl.cc:
  old_password_plugin is not used for EMBEDDED_LIBRARY
storage/pbxt/src/ha_pbxt.cc:
  Remove not used variable

include/m_ctype.h

@@ -291,7 +291,7 @@ struct charset_info_st
   const uint16 *const *sort_order_big;
   const uint16 *tab_to_uni;
   MY_UNI_IDX   *tab_from_uni;
-  const MY_UNICASE_INFO *const *caseinfo;
+  MY_UNICASE_INFO *const *caseinfo;
   const uchar  *state_map;
   const uchar  *ident_map;
   uint      strxfrm_multiply;

plugin/auth/dialog.c

@@ -51,6 +51,8 @@
 #define PASSWORD_QUESTION       "\4"
 #define LAST_PASSWORD           "\5"
 
+typedef unsigned char uchar;
+
 /********************* SERVER SIDE ****************************************/
 
 /**
@@ -63,7 +65,9 @@ static int two_questions(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
   int pkt_len;
 
   /* send a password question */
-  if (vio->write_packet(vio, PASSWORD_QUESTION "Password, please:", 18))
+  if (vio->write_packet(vio,
+                        (const uchar*) (PASSWORD_QUESTION "Password, please:"),
+                        18))
     return CR_ERROR;
 
   /* read the answer */
@@ -73,11 +77,12 @@ static int two_questions(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
   info->password_used = 1;
 
   /* fail if the password is wrong */
-  if (strcmp(pkt, info->auth_string))
+  if (strcmp((char*) pkt, info->auth_string))
     return CR_ERROR;
 
   /* send the last, ordinary, question */
-  if (vio->write_packet(vio, LAST_QUESTION "Are you sure ?", 15))
+  if (vio->write_packet(vio,
+                        (const uchar*) (LAST_QUESTION "Are you sure ?"), 15))
     return CR_ERROR;
 
   /* read the answer */
@@ -85,7 +90,7 @@ static int two_questions(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
     return CR_ERROR;
 
   /* check the reply */
-  return strcmp(pkt, "yes, of course") ? CR_ERROR : CR_OK;
+  return strcmp((char*) pkt, "yes, of course") ? CR_ERROR : CR_OK;
 }
 
 static struct st_mysql_auth two_handler=
@@ -108,7 +113,8 @@ static int three_attempts(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
   for (i= 0; i < 3; i++)
   {
     /* send the prompt */
-    if (vio->write_packet(vio, PASSWORD_QUESTION "Password, please:", 18))
+    if (vio->write_packet(vio,
+                          (const uchar*) (PASSWORD_QUESTION "Password, please:"), 18))
       return CR_ERROR;
 
     /* read the password */
@@ -121,7 +127,7 @@ static int three_attempts(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
       finish, if the password is correct.
       note, that we did not mark the prompt packet as "last"
     */
-    if (strcmp(pkt, info->auth_string) == 0)
+    if (strcmp((char*) pkt, info->auth_string) == 0)
       return CR_OK;
   }
 
@@ -255,12 +261,12 @@ static int perform_dialog(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql)
       if ((cmd >> 1) == 2 && *pkt == 0)
         reply= mysql->passwd;
       else
-        reply= ask(mysql, cmd >> 1, pkt, reply_buf, sizeof(reply_buf));
+        reply= ask(mysql, cmd >> 1, (char*) pkt, reply_buf, sizeof(reply_buf));
       if (!reply)
         return CR_ERROR;
     }
     /* send the reply to the server */
-    res= vio->write_packet(vio, reply, strlen(reply)+1);
+    res= vio->write_packet(vio, (uchar*) reply, strlen(reply)+1);
 
     if (reply != mysql->passwd && reply != reply_buf)
       free(reply);

sql/sql_acl.cc

@@ -161,7 +161,10 @@ static LEX_STRING old_password_plugin_name= {
 /// @todo make it configurable
 LEX_STRING *default_auth_plugin_name= &native_password_plugin_name;
 
-static plugin_ref native_password_plugin, old_password_plugin;
+static plugin_ref native_password_plugin;
+#ifndef EMBEDDED_LIBRARY
+static plugin_ref old_password_plugin;
+#endif
 
 /* Classes */
 

storage/pbxt/src/ha_pbxt.cc

@@ -1215,8 +1215,6 @@ static int pbxt_init(void *p)
 				THD *thd = NULL;
 
 #ifndef DRIZZLED
-				extern myxt_mutex_t LOCK_plugin;
-
 				/* {MYSQL QUIRK}
 				 * I have to release this lock for PBXT recovery to
 				 * work, because it needs to open .frm files.