LI75788: ACCURACY OF COMPILER MSG FOR MODIFIED MOD FILE

November 2010 Update for XL Fortran for Linux, V13.1
April 2011 Update for XL Fortran for Linux, V13.1
July 2011 Update for XL Fortran for Linux, V13.1
October 2011 Update for XL Fortran for Linux, V13.1
June 2012 Update for XL Fortran for Linux, V13.1
October 2012 Update for XL Fortran for Linux, V13.1
XL Fortran for Linux Fix Pack 8 (June 2013 Update) for 13.1

APAR status

• Closed as program error.

Error description

• Questionable accuracy of the message produced by the compiler
  when compiling a source file that has had it's .mod file
  modified between compilations.
  
  ---------
  TEST CASE
  ---------
  
  foo.f :
         MODULE foo
           IMPLICIT NONE
           INTEGER i,j
           REAL a,b
           PRIVATE i,j,a,b
         CONTAINS
           SUBROUTINE fake_sub(n,x)
             INTEGER n
             REAL x
             a=x
             DO i=2,n
                a=x*i
             ENDDO
             x=a
           END SUBROUTINE fake_sub
         END MODULE foo
  
  Compile source code using the following sequence of
  instructions:
  
  > xlf_r -c foo.f
  > rm foo.mod foo.o
  > echo "This little text in the .mod file will fail the
    compilation" > foo.mod
  > xlf_r -c foo.f
  
  The compiler will produce the following message:
  
  "foo.f", line 1.1: 1513-116 (S) Unable to create module symbol
  file
  foo.mod. Please check the path, directory and permissions.
  ** foo   === End of Compilation 1 ===
  1501-511  Compilation failed for file foo.f.
  
  This message does not accurately describe the situation.
  

Local fix

• N/A
  

Problem summary

• ROBLEM DESCRIPTION:
  Frontend issues an error message that does not describe the
  problem well.
  
  USERS AFFECTED:
  Users who have corrupted .mod file or the .mod with
  unrecognized xlf module format are affected.
  

Problem conclusion

• Issue a more appropriate message.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IZ77418

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  XL FORTRAN LINU

• Fixed component ID

  5724X1600

Applicable component levels

• RD10 PSN IZ77418

     UP06/09/13