Microsoft KB Archive/104859

= FIX: $STORAGE:2 or /4I2 Generates Incorrect Code =

PSS ID Number: 104859

Article Last Modified on 3/24/2000

-

The information in this article applies to:


 * Microsoft FORTRAN PowerStation for MS-DOS 1.0

-



This article was previously published under Q104859



SYMPTOMS
Using the undocumented compiler option /4I2 or the equivalent undocumented metacommand $STORAGE:2 will:


 * Miscalculate integer array sizes for DATA statements
 * Interpret explicitly declared INTEGER*4 variables as INTEGER*2



RESOLUTION
The compiler option /4I2 and the metacommand $STORAGE:2 are not intended to be used with this compiler. They are not documented for the same reason. However, any erroneous behavior may be avoided by replacing every instance of "integer " with "integer*2 " and declaring implicit integer*2 (i-n) at the very beginning of each subroutine.

It is necessary to replace every instance of "integer " with "integer*2 " because explicit integer declarations are treated as integer*4.



STATUS
Microsoft has confirmed this to be a problem in FORTRAN PowerStation for MS-DOS version 1.0. This problem has been resolved with FORTRAN PowerStation maintenance release version 1.0a for MS-DOS.



Sample Code 1
C Compile options needed: none (or comment out line 1 and use: /4I2) $storage:2 integer iunit(3) data iunit/100,10,1/ print*, iunit end C This will generate the following error: C  F2408: IUNIT : DATA : too few constants to initialize item

Sample Code 2
C Compile options needed: none (or comment out line 1 and use: /4I2) $storage:2 integer*4 i,j j = 30000 i = j*j print*, i,j end C When run, this will give the following wrong result: C  -5888    30000 C instead of the following correct result: C  900000000    30000 FORTRAN PowerStation version 1.0 can be differentiated from the maintenance release version 1.0a by invoking the linker. Typing link32 | more from \F32\BIN directory will show version 2.8 for FORTRAN PowerStation version 1.0, and it will show version 1.0f for the maintenance release version 1.0a.

Additional query words: 1.00 buglist1.00 fixlist1.00a

Keywords: kbbug KB104859

Technology: kbAudDeveloper kbFORTRANPower100DOS kbFortranSearch kbZNotKeyword3

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© 2004 Microsoft Corporation. All rights reserved.