make 5.1 compiling with modern gcc.

mysys/md5.c

@@ -176,7 +176,7 @@ my_MD5Final (unsigned char digest[16], my_MD5Context *ctx)
   putu32(ctx->buf[1], digest + 4);
   putu32(ctx->buf[2], digest + 8);
   putu32(ctx->buf[3], digest + 12);
-  memset(ctx, 0, sizeof(ctx));	/* In case it's sensitive */
+  memset(ctx, 0, sizeof(*ctx));	/* In case it's sensitive */
 }
 
 #ifndef ASM_MD5

sql/field.cc

@@ -7709,7 +7709,7 @@ int Field_blob::store(const char *from,uint length,CHARSET_INFO *cs)
     if (!String::needs_conversion(length, cs, field_charset, &dummy_offset))
     {
       Field_blob::store_length(length);
-      bmove(ptr+packlength,(char*) &from,sizeof(char*));
+      bmove(ptr + packlength, &from, sizeof(char*));
       return 0;
     }
     if (tmpstr.copy(from, length, cs))
@@ -8364,7 +8364,7 @@ int Field_geom::store(const char *from, uint length, CHARSET_INFO *cs)
       value.copy(from, length, cs);
       from= value.ptr();
     }
-    bmove(ptr + packlength, (char*) &from, sizeof(char*));
+    bmove(ptr + packlength, &from, sizeof(char*));
   }
   return 0;
 

storage/maria/ma_blockrec.c

@@ -7154,7 +7154,7 @@ my_bool _ma_apply_undo_row_delete(MARIA_HA *info, LSN undo_lsn,
 
       memcpy(field_pos, field_length_data, size_length);
       field_length_data+= size_length;
-      memcpy(field_pos + size_length, &header, sizeof(&header));
+      memcpy(field_pos + size_length, &header, sizeof(header));
       header+= blob_length;
       *blob_lengths++= blob_length;
       break;

storage/maria/ma_checksum.c

@@ -58,7 +58,7 @@ ha_checksum _ma_checksum(MARIA_HA *info, const uchar *record)
       length= _ma_calc_blob_length(blob_size_length, pos);
       if (length)
       {
-        memcpy((char*) &pos, pos + blob_size_length, sizeof(char*));
+        memcpy(&pos, pos + blob_size_length, sizeof(char*));
         crc= my_checksum(crc, pos, length);
       }
       continue;

storage/maria/ma_key.c

@@ -583,7 +583,7 @@ static int _ma_put_key_in_record(register MARIA_HA *info, uint keynr,
 	goto err;
 #endif
       memcpy(record+keyseg->start+keyseg->bit_start,
-	     (char*) &blob_ptr,sizeof(char*));
+	     &blob_ptr,sizeof(char*));
       memcpy(blob_ptr,key,length);
       blob_ptr+=length;
 

storage/myisam/mi_checksum.c

@@ -40,7 +40,7 @@ ha_checksum mi_checksum(MI_INFO *info, const uchar *buf)
       length=_mi_calc_blob_length(column->length-
                                   portable_sizeof_char_ptr,
                                   buf);
-      memcpy((char*) &pos, buf+column->length- portable_sizeof_char_ptr,
+      memcpy(&pos, buf+column->length- portable_sizeof_char_ptr,
 	     sizeof(char*));
       break;
     }

storage/myisam/mi_key.c

@@ -419,7 +419,7 @@ static int _mi_put_key_in_record(register MI_INFO *info, uint keynr,
 	goto err;
 #endif
       memcpy(record+keyseg->start+keyseg->bit_start,
-	     (char*) &blob_ptr,sizeof(char*));
+	     &blob_ptr,sizeof(char*));
       memcpy(blob_ptr,key,length);
       blob_ptr+=length;
 

storage/pbxt/src/myxt_xt.cc

@@ -937,7 +937,7 @@ xtPublic xtBool myxt_create_row_from_key(XTOpenTablePtr XT_UNUSED(ot), XTIndexPt
 			 */
 			byte *key_ptr = key; // Cannot take the address of a register variable!
 			memcpy(record+keyseg->start+keyseg->bit_start,
-			 (char*) &key_ptr,sizeof(char*));
+                               &key_ptr,sizeof(char*));
 
 			my_store_blob_length(record+keyseg->start,
 					(uint) keyseg->bit_start,length);