Patch, Allocate, Mixed-Language Windows Programming

• Microsoft FORTRAN for MS-DOS, version 5.1

SUMMARY

This application note corrects the unresolved externals that may occur when linking a mixed-language Windows program using FORTRAN and C. If the FORTRAN code uses the ALLOCATE statement, LINK may generate the following errors:

LINK : error L2029: Unresolved external: _hfree
LINK : error L2029: Unresolved external: _hmalloc

MORE INFORMATION

The following file is available for download from the Microsoft Download Center. Click the file name below to download the file:

hf0484.exe

http://www.microsoft.com/downloads/search.asp

======================================================================
    Microsoft Product Support Services Application Note (Text File)
     HF0484: PATCH: ALLOCATE IN MIXED-LANGUAGE WINDOWS PROGRAMMING
======================================================================
                                                  Revision Date: 11/91
                                                         Disk Included

The following information applies to FORTRAN version 5.1.

 --------------------------------------------------------------------
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| Application Note) IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY      |
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| on the disk(s) must be copied without modification [the MS-DOS(R)  |
| utility DISKCOPY is appropriate for this purpose]; 3) All          |
| components of this Application Note must be distributed together;  |
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| Copyright 1991 Microsoft Corporation. All Rights Reserved.         |
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| trademarks and Windows is a trademark of Microsoft Corporation.    |
 --------------------------------------------------------------------

This application note corrects a problem that occurs when you link a
mixed-language Windows program using FORTRAN and C. If the FORTRAN
code uses the ALLOCATE statement, LINK generates two errors:

   LINK : error L2029:  Unresolved external: _hfree
   LINK : error L2029:  Unresolved external: _hmalloc

The errors are caused by the absence of several routines in the C-
compatible FORTRAN run-time library. To correct this problem, you must
add to the C-compatible FORTRAN run-time library the three object
modules that are included on the enclosed HF0484 disk.

Modifying the C-Compatible FORTRAN Run-Time Library
---------------------------------------------------

To make the correction to the C-compatible FORTRAN run-time library,
copy the following three object modules from the enclosed HF0484 disk
to the directory where your FORTRAN library is located:

   WHALLOC.OBJ
   WHSEG.OBJ
   HMAP.OBJ

Then, enter the following command

   LIB <LIBNAME.LIB> + WHALLOC.OBJ + WHSEG.OBJ + HMAP.OBJ;

where <LIBNAME.LIB> represents the name of the C-compatible FORTRAN
run-time library you want to modify. You can then delete the three
object modules from the library directory. The library manager will
make a backup file named <LIBNAME.BAK>. When the new library has been
tested successfully, you can also delete this backup file. 

Additional query words:

Keywords : kbfile kbsample
Version : :5.1
Platform :
Issue type : kbinfo