Portability fixes for windows

include/config-win.h:
  Portability fix for windows
include/my_global.h:
  General portability fix
sql/mysqld.cc:
  Portability fix for windows
sql/set_var.cc:
  Portability fix for windows
sql/sql_yacc.yy:
  Portability fix for windows

include/config-win.h

@@ -259,6 +259,7 @@ inline double ulonglong2double(ulonglong value)
 #define HAVE_ISNAN
 #define HAVE_FINITE
 #define HAVE_ISAM		/* We want to have support for ISAM in 4.0 */
+#define SPRINTF_RETURNS_INT
 
 #ifdef NOT_USED
 #define HAVE_SNPRINTF		/* Gave link error */

include/my_global.h

@@ -1016,7 +1016,7 @@ typedef union {
 #ifdef SPRINTF_RETURNS_PTR
 #define my_sprintf(buff,args) ((int)(sprintf args - buff))
 #else
-#define my_sprintf(buff,args) sprintf args,strlen(buff)
+#define my_sprintf(buff,args) ((ulong) sprintf args, (ulong) strlen(buff))
 #endif
 #endif
 

sql/mysqld.cc

@@ -3339,7 +3339,7 @@ struct my_option my_long_options[] =
 #ifdef USE_SYMDIR
   {"use-symbolic-links", 's', "Enable symbolic link support",
    (gptr*) &my_use_symdir, (gptr*) &my_use_symdir, 0, GET_BOOL, NO_ARG,
-   USE_PURIFY(0,1), 0, 0, 0, 0, 0},
+   IF_PURIFY(0,1), 0, 0, 0, 0, 0},
 #endif
   {"user", 'u', "Run mysqld daemon as user", (gptr*) &mysqld_user,
    (gptr*) &mysqld_user, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},

sql/set_var.cc

@@ -1208,7 +1208,8 @@ void set_var_free()
 
 sys_var *find_sys_var(const char *str, uint length)
 {
-  sys_var *var= (sys_var*) hash_search(&system_variable_hash, str,
+  sys_var *var= (sys_var*) hash_search(&system_variable_hash,
+				       (byte*) str,
 				       length ? length :
 				       strlen(str));
   if (!var)

sql/sql_yacc.yy

@@ -3287,7 +3287,7 @@ option_value:
 	    LEX *lex=Lex;
 	    lex->var_list.push_back(new set_var(lex->option_type,
 						find_sys_var("tx_isolation"),
-						new Item_int((int) $4)));
+						new Item_int((int32) $4)));
 	  }
 	| CHAR_SYM SET opt_equal set_expr_or_default
 	{