BUG: !MS$ATTRIBUTES in Interface Fails with Free-Form Source

• Microsoft Fortran PowerStation for Windows 95 and Windows NT, version 4.0

SYMPTOMS

When you assign an attribute to multiple variables with the same !ms$attributes metacommand in an interface block of a free-form source code file, only the first variable is given the attribute.

RESOLUTION

Do one of the following to work around the problem:

• Specify the !ms$nofreeform metacommand for the interface block.

  -or-

• Use one !ms$attribute metacommand for each variable.

  -or-

• Use a fixed-form source code file.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

In the following sample code, when the compiler parses the line containing the !ms$attributes metacommand in the interface block, only the variable "i" is correctly assigned the value attribute. The variable "j" is not processed and therefore retains the default Fortran reference attribute.

Sample Code to Demonstrate Problem and Workarounds

! Compile options needed: none ! required extension: .F90

      program test

          interface
              subroutine thesub(i, j)
                  integer i, j

                   !ms$attributes value :: i, j

!                   !ms$attributes value :: i
!                   !ms$attributes value :: j
              end subroutine
          end interface

          integer i, j
          i = 1
          j = 2
          call thesub(i, j)
      end

      subroutine thesub(i, j)
          integer i, j
          !ms$attributes value :: i, j
          print *, i, j         ! should print "1 2"
      end subroutine