APPNOTE: Patch, Allocate, Mixed-Language Windows Programming

Last reviewed: February 16, 1996
Article ID: Q78522

The information in this article applies to:

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

To obtain the application note "PATCH: Allocate in Mixed-Language Windows Programming," call Microsoft Product Support Services.

This application note is also available in the Microsoft Software Library. Download HF0484.EXE, a self-extracting file, from the Microsoft Software Library (MSL) on the following services:

Microsoft Download Service (MSDL)

      Dial (206) 936-6735 to connect to MSDL
      Download HF0484.EXE (size: 18675 bytes)

Internet (anonymous FTP)

      ftp ftp.microsoft.com
      Change to the \softlib\mslfiles directory
      Get HF0484.EXE (size: 18675 bytes)

MORE INFORMATION

The following is the text of the application note:

    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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| Copyright 1991 Microsoft Corporation. All Rights Reserved.         |
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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 reference words: 5.10 HF0484.EXE
KBCategory: kbtool kbappnote kbfile
KBSubcategory: FLIss

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Last reviewed: February 16, 1996
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