PRB: L2028 Error Caused by HEAPSIZE, STACKSIZE and DGROUP Size
ID: Q49935
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The information in this article applies to:
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Microsoft LINK for MS-DOS, versions 5.01.21, 5.1, 5.13, 5.15, 5.3, 5.31.009, 5.5, 5.6
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Microsoft LINK for OS/2, versions 5.01.21, 5.1
SYMPTOMS
An attempt to link an application fails and Microsoft LINK displays
the following message:
L2028: Automatic data segment plus heap exceeds 64K
CAUSE
This error occurs when the segment containing the stack and data plus
the near heap (DGROUP) exceeds 64K.
RESOLUTION
Use one of the following three methods to address this situation:
- Reduce the amount of data in the default data segment.
If the L2028 error occurs with object modules produced by the
Microsoft C compiler, one or more of the following three techniques
will decrease the amount of data in the default data segment.
If the application uses the compact, large, or huge memory
model, specify the /Gt3 compiler option switch to move any data
item three bytes or larger from the default data segment
(DGROUP) into a far data segment. If desired, you can specify a
larger threshold.
Remove data from DGROUP by declaring it as FAR (in an
application designed for the Microsoft Windows operating
system), or far, _far, or __far depending on the version of
Microsoft C, C/C++, or Visual C++ you are using.
If your application requires a large stack due to a great deal
of local data (which is any non-static data declared in a
function), declare that data as static to prevent it from being
stored on the stack. Because this technique only moves the data
to a different area in DGROUP, it must be combined with one of
the techniques described earlier to remove it from DGROUP.
- Use the /ST linker option switch or the STACKSIZE option in the
module definition (.DEF) file to reduce the size of the stack.
- Use the /CP linker option switch or the HEAPSIZE option in the .DEF
file to reduce the amount of near heap space that the application
requests. NOTE: this switch is only useful for building DOS
applications. If you're building Windows applications, HEAPSIZE must
be used.
The L2028 error was omitted from the linker error messages in the
Microsoft C "CodeView and Utilities, Microsoft Editor, Mixed-Language
Programming Guide" manual for version 5.1.
Additional query words:
5.10 5.30 5.50 5.60
Keywords : kb16bitonly
Version : MS-DOS:5.01.21,5.1,5.13,5.15,5.3,5.31.009,5.5,5.6; OS/2:5.01.21,5.1
Platform : MS-DOS OS/2
Issue type :
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