From: Jeff Squyres <jsquyres@XXXXXXXXX>
Date: January 18, 2008 3:10:49 PM CST
To: mpi-21@XXXXXXXXXXXXX,mpi-21@XXXXXXXXXXX
Subject: [mpi-21] Ballot 4 proposal: fix attribute example 4.13
Reply-To: mpi-21@XXXXXXXXXXXXX

Per http://www.cs.uiuc.edu/homes/wgropp/projects/parallel/MPI/mpi-errata/, the errata item entitled "Error in Example 4.13 in MPI-2 (Use of Attributes in C and Fortran)".  I believe that this errata item supersedes the errata item "Interlanguage use of Attributes".

See the mail discussing:

http://www.cs.uiuc.edu/homes/wgropp/projects/parallel/MPI/mpi-errata/discuss/attrcandf/

Proposal:

Change MPI-2:4.12, p58:36 from:
  IF (val.NE.5) THEN CALL ERROR
to
  IF (val.NE.address_of_i) THEN CALL ERROR

Rationale:

MPI-2:4.12 p58:12-13 and 16-18 clearly state that if an attribute is set by C, retrieving it in Fortran will obtain the address of the attribute.

See the mails for more discussion, including an exhaustive list of what happens for each of the 9 possibilities of setting and getting attribute values between the different languages.

-- 
Jeff Squyres
Cisco Systems