Bug #42144: plugin_load fails

Reverted the ulong->uint diff
Re-applied the first diff.
The original commit message follows:

enum plugin system variables are ulong internally, not int.
On systems where long is not the same as an int it causes
problems. 
Fixed by correct typecasting. Removed the test from the 
experimental list.

include/mysql/plugin.h

@@ -318,7 +318,7 @@ DECLARE_MYSQL_SYSVAR_SIMPLE(name, unsigned long long) = { \
   #name, comment, check, update, &varname, def, min, max, blk }
 
 #define MYSQL_SYSVAR_ENUM(name, varname, opt, comment, check, update, def, typelib) \
-DECLARE_MYSQL_SYSVAR_TYPELIB(name, unsigned int) = { \
+DECLARE_MYSQL_SYSVAR_TYPELIB(name, unsigned long) = { \
   PLUGIN_VAR_ENUM | ((opt) & PLUGIN_VAR_MASK), \
   #name, comment, check, update, &varname, def, typelib }
 

mysys/my_getopt.c

@@ -664,13 +664,13 @@ static int setval(const struct my_option *opts, void *value, char *argument,
             Accept an integer representation of the enumerated item.
           */
           char *endptr;
-          uint arg= (uint) strtoul(argument, &endptr, 10);
+          ulong arg= strtoul(argument, &endptr, 10);
           if (*endptr || arg >= opts->typelib->count)
             return EXIT_ARGUMENT_INVALID;
-          *(uint*)result_pos= arg;
+          *((ulong*) result_pos)= arg;
         }
         else
-          *(uint*)result_pos= type - 1;
+          *((ulong*) result_pos)= type - 1;
       }
       break;
     case GET_SET:
@@ -1008,7 +1008,7 @@ static void init_one_value(const struct my_option *option, void *variable,
     *((int*) variable)= (int) getopt_ll_limit_value((int) value, option, NULL);
     break;
   case GET_ENUM:
-    *((uint*) variable)= (uint) value;
+    *((ulong*) variable)= (ulong) value;
     break;
   case GET_UINT:
     *((uint*) variable)= (uint) getopt_ull_limit_value((uint) value, option, NULL);
@@ -1248,7 +1248,7 @@ void my_print_variables(const struct my_option *options)
 	}
 	break;
       case GET_ENUM:
-        printf("%s\n", get_type(optp->typelib, *(uint*) value));
+        printf("%s\n", get_type(optp->typelib, *(ulong*) value));
 	break;
       case GET_STR:
       case GET_STR_ALLOC:                    /* fall through */

sql/sql_plugin.cc

@@ -3030,12 +3030,12 @@ static int construct_options(MEM_ROOT *mem_root, struct st_plugin_int *tmp,
     Allocate temporary space for the value of the tristate.
     This option will have a limited lifetime and is not used beyond
     server initialization.
-    GET_ENUM value is unsigned integer.
+    GET_ENUM value is a unsigned long integer.
   */
   options[0].value= options[1].value= (uchar **)alloc_root(mem_root,
-                                                          sizeof(uint));
-  *((uint*) options[0].value)= *((uint*) options[1].value)=
-    (uint) options[0].def_value;
+                                                          sizeof(ulong));
+  *((ulong*) options[0].value)= *((ulong*) options[1].value)=
+    (ulong) options[0].def_value;
 
   options+= 2;
 

storage/example/ha_example.cc

@@ -848,7 +848,7 @@ int ha_example::create(const char *name, TABLE *table_arg,
 struct st_mysql_storage_engine example_storage_engine=
 { MYSQL_HANDLERTON_INTERFACE_VERSION };
 
-static uint srv_enum_var= 0;
+static ulong srv_enum_var= 0;
 static ulong srv_ulong_var= 0;
 
 const char *enum_var_names[]=