Q58410: BUILDRTM "Unresolved External" Using OVLDOS21.OBJ; Not Allowed

Article: Q58410
Product(s): See article
Version(s): 7.00 7.10
Operating System(s): MS-DOS
Keyword(s): ENDUSER | docerr | mspl13_basic
Last Modified: 8-JAN-1991

The stub file OVLDOS21.OBJ, which is shipped with Microsoft BASIC
Professional Development System (PDS) Versions 7.00 and 7.10 for
MS-DOS, can be linked into an .EXE program that uses an extended
run-time module, but is not allowed to be built into an extended
run-time module.

The link error "L2029: Unresolved external" displays a few times if
you attempt to use the BUILDRTM.EXE utility to place the OVLDOS21.OBJ
file into an extended run-time module.

The following sentences need to be added to Pages 539, 611, and 663 of
the "Microsoft BASIC 7.0: Programmer's Reference" manual (for versions
7.00 and 7.10):

   Note that you cannot use BUILDRTM to build the OVLDOS21.OBJ stub
   file into an extended run-time module. You can link OVLDOS21.OBJ
   into an .EXE program that uses a normal or extended run-time
   module.

The following is a correct example to link the OVLDOS21.OBJ stub file
for use with an extended run-time module:

LINK import.obj+main.obj+OVLDOS21.obj+(sub1)+(sub2),main.exe,,extrtm.lib;

The OVLDOS21.OBJ stub file shipped with BASIC PDS Version 7.00 is
provided to support code overlays under MS-DOS Version 2.10. This stub
file is not required if overlays are to be used on MS-DOS Versions 3.00
and later. For more information about overlays, search for a separate
article by querying on the following words:

   how and use and LINK and overlays and BASIC and PDS and 7.00

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