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Q61337: BASIC PDS 7.00 Not Compatible with C PDS Version 6.00

Article: Q61337
Product(s): See article
Version(s): 6.00 6.00b 7.00 | 6.00 6.00b 7.00
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | SR# S900415-6 B_QuickBas S_C S_QuickC | mspl13_basic
Last Modified: 18-OCT-1990

Microsoft BASIC Professional Development System (PDS) version 7.00,
QuickBASIC version 4.50, and earlier versions of BASIC are not
compatible with Microsoft C Professional Development System version
6.00 or Microsoft QuickC version 2.50 or 2.51. You must obtain BASIC
PDS 7.10 to be compatible with these versions of C and QuickC.

Below are some of the LINK L2025 errors that can occur when you LINK
an incompatible BASIC version with Microsoft C PDS version 6.00:

   E:\C600\LIB\MLIBCE.LIB(chkstk.asm) : error L2025: STKHQQ : symbol
    defined more than once

   E:\C600\LIB\MLIBCE.LIB(chkstk.asm) : error L2025: __aaltstkovr :
    symbol defined more than once

   E:\C600\LIB\MLIBCE.LIB(chkstk.asm) : error L2025: __chkstk :
    symbol defined more than once

This information applies to Microsoft QuickBASIC versions 4.00, 4.00b,
and 4.50 for MS-DOS, to Microsoft BASIC Compiler versions 6.00 and
6.00b for MS-DOS, and to Microsoft BASIC PDS version 7.00 for MS-DOS
and MS OS/2.

A separate article, found by querying in this Knowledge Base using the
following words, describes which specific Microsoft language compiler
versions are designed to be linked together:

   BASIC and C and QuickC and calling and linked and modules

For more specific information about how to do mixed-language
programming with Microsoft C and Microsoft BASIC, query in this
Knowledge Base on the following word:

   BAS2C

Microsoft C PDS version 6.00 and Microsoft QuickC versions 2.50 and
2.51 use different start-up and heap management code than previous
versions of C and QuickC. Since the BASIC libraries must be put first
on the LINK line, the BASIC libraries supply alternate start-up, heap,
and low-level I/O code for the LINKed C routines. These alternate
routines are specific to the versions of C available when the BASIC
products shipped.

Each version of BASIC is tested and designed to work with the versions
of Microsoft C and QuickC currently on the market when the BASIC
package is released. Incompatibilities caused by new releases of C and
QuickC are resolved whenever an updated BASIC product ships.

To find a separate article in this Knowledge Base that describes the /Gh
option (which makes C 6.00 use the C 5.10 libraries, for Microsoft
Windows 2.x compatibility), as mentioned in the C 6.00 README.DOC
file, query on the following words:

   /Gh and 6.00 and 5.10 and C and library and compatibility

However, BASIC PDS 7.00 and QuickBASIC 4.50 (and earlier versions) are
not compatible with routines compiled with C 6.00, even when the C
6.00 /Gh option is used.

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