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| Subject: |
xlf to be upgraded on seaborg 12/10/03 |
| Author: |
Michael Stewart <pmstewart_at_lbl.gov> |
| Date: |
2003-12-04 11:57:25 |
| The default version of the IBM Fortran compiler on seaborg.nersc.gov
will be upgraded on Wednesday, 12/10/03. This version contains fixes to
several compiler bugs reported to IBM as well as some other minor
changes and new features.
This new version of Fortran is 8.1.1.3. This version is currently
contained in the xlf module on seaborg. The changes and new features in
this release of Fortran are described in the attached file
README.8.1.1.3 which also contains corrections to the IBM Fortran
documentation.
Version 8.1.1.3 is currently on seaborg in the xlf module.
--
Michael Stewart
NERSC Consultant
510-486-6648
pmstewart@lbl.gov
* @(#) 01 1.2.13.12 11/20/03 17:34:10
*
* COMPONENT_NAME: (Fortran) %%_OS_XLF_%%
*
* FUNCTIONS: XLF README file
*
* ORIGINS: 27
*
* IBM(R) XL Fortran for AIX(R), Version 8.1.1 5765-F70, 5765-F71
* (C) COPYRIGHT International Business Machines Corp. 1990, 2003
* All Rights Reserved
* Licensed Materials - Property of IBM
*
* US Government Users Restricted Rights - Use, duplication or
* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
* AIX, IBM, and OS/400 are trademarks of IBM Corp.
* Other company, product, and service names may be trademarks or service
* marks of others.
This README file contains the latest information about IBM XL Fortran
for AIX, Version 8.1.1 that was not available for our online help and
documentation.
By using IBM XL Fortran for AIX, Version 8.1.1, you agree to the terms of
the license information. The License Information document is available as
a PDF file and can be found in the root directory on the CD-ROM, or in the
following directory after installing the product:
/usr/lpp/xlf/license.pdf
You will need a Portable Document Format (PDF) viewer to view the license
agreement.
Note:
IBM XL Fortran for AIX, Version 8.1.1 is licensed based on a charge unit
of one authorized user. The Program may be stored on more than one
machine, provided that the Program is not in active use on more than one
machine at the same time.
An authorized user is an individual or specific named user authorized to
have access to the program or any portion of the program. The Proof of
Entitlement for this program is evidence of your authorization. Each
individual or specific named user must obtain a Proof of Entitlement for
each operating system on which the product is installed.
This document contains the following sections:
I. Viewing Documentation on AIX
II. Installation Issues
III. XL Fortran for AIX 8.1.1.3 PTF
IV. XL Fortran for AIX 8.1.1.2 PTF
V. XL Fortran for AIX 8.1.1.1 PTF
VI. Known Limitations for IBM XL Fortran for AIX, V8.1.1
VII. Documentation Corrections
VIII. AS-IS Functions and/or Components
I. Viewing Documentation on AIX
===============================
To view the documentation, you must have X-Windows working on your system.
In addition, you need to have the appropriate viewers, such as a
frames-capable HTML browser like Mozilla (version 1.0, or later) and a PDF
viewer, such as the Adobe Acrobat Reader.
II. Installation Issues
=======================
Installing the PTF
------------------
If you have installed XL Fortran for AIX in a non-default location, you
can use the xlfndi script to apply a PTF to that location. Refer to
"Installing XL Fortran to a Non-Default Directory" in the Memo to Users
for details.
Japanese Documentation on the Web
---------------------------------
At the time the product CD-ROM was created, only the Japanese
README.FIRST.ja_JP, memo-cmp-rte.txt.ja_JP, and memo-rte.txt.ja_JP
files were available and included.
The remaining translated publications are available for download, as
compressed files, from the XL Fortran for AIX, V8.1.1 documentation
download page:
Publication Format File Name
----------------------------------------- ------ ------------------
IBM XL Fortran for AIX User's Guide HTML ug_jaJP_html.tar.Z
PDF ug_jaJP.pdf.Z
PS ug_jaJP.ps.Z
IBM XL Fortran for AIX Language Reference HTML lr_jaJP_html.tar.Z
PDF lr_jaJP.pdf.Z
PS lr_jaJP.ps.Z
From your Web browser, open the XL Fortran Support page at URL:
http://www.ibm.com/software/awdtools/fortran/xlfortran/support/
Select the "Library" link for the documentation download page.
Under "Product manuals" select:
"XL Fortran V8.1.1 for AIX (Japanese language HTML, PDF, PS)
Create the appropriate subdirectory and download the corresponding file to
this directory. Uncompress the file.
Suggested directories for uncompressed files:
File Uncompress in Directory
------------ ----------------------------------
*_html.tar.Z /usr/share/man/info/ja_JP/xlf/html
*.pdf.Z /usr/share/man/info/ja_JP/xlf/pdf
*.ps.Z /usr/share/man/info/ja_JP/xlf/ps
Rename the uncompressed *.ps and *.pdf files as follows:
Rename To:
----------- ------
lr_jaJP.pdf lr.pdf
lr_jaJP.ps lr.ps
UG_jaJP.pdf UG.pdf
Ug_jajP.ps Ug.ps
Portable Application Solutions Environment (OS/400 PASE) Support
----------------------------------------------------------------
IBM XL Fortran for AIX, V8.1.1 can be installed and operated in the
OS/400(R) PASE environment.
xlfndi Not Shipped with XL Fortran Try-and-Buy Version
------------------------------------------------------
The xlf.ndi fileset is not provided with the IBM XL Fortran for AIX,
V8.1.1, Try-and-Buy. You cannot use the xlfndi Perl script to install the
XL Fortran Try-and-Buy to a non-default directory.
III. XL Fortran for AIX 8.1.1.3 PTF
===================================
DEFAULT_RECL runtime option
---------------------------
The DEFAULT_RECL runtime option allows you to determine the default
record size for sequential files opened without a RECL= specifier.
Use the XLFRTEOPTS environment variable to specify the DEFAULT_RECL
runtime option.
DEFAULT_RECL uses the following syntax:
default_recl={ 64 | 32 }
--
64:
Uses a 64-bit value as the default record size.
32:
Uses a 32-bit value as the default record size.
The DEFAULT_RECL run-time option applies only in 64-bit mode. In 32-bit
mode, DEFAULT_RECL is ignored and the default record size is 32-bit.
Use DEFAULT_RECL when porting 32-bit programs to 64-bit mode where a
64-bit record length will not fit into the specified integer variable.
Consider the following:
INTEGER(4) I
OPEN (11)
INQUIRE (11, RECL=I)
A runtime error occurs in the above code sample in 64-bit mode when
default_recl=64, since the default record length of 2**63-1 does not fit
into the 4-byte integer I. Specifying default_recl=32 ensures a default
record size of 2**31-1 which fits into I.
For more information on the RECL= specifier, see the OPEN statement in
the "Statements" chapter of the XL Fortran Language Reference.
Language Reference Errata
-------------------------
Initialization Expressions
--------------------------
In the Expressions and Assignment chapter in the Initialization
Expressions section, the paragraph immediately before the example
now states:
If an initialization expression includes a reference to an inquiry
function for a type parameter or an array bound of an object specified
in the same specification part, the type parameter or array bound must be
specified in a prior specification of the specification part. The prior
specification can be to the left of the inquiry function in the same
statement, but not within the same entity declaration.
omp_init_nest_lock
------------------
The description of the OpenMP 2.0 routine omp_init_nest_lock now states:
The omp_init_nest_lock subroutine allows you to initialize a nestable
lock and associate it with the lock variable you specify. The initial
state of the lock variable is unlocked, and the initial nesting count
is zero. The argument must be an unitialized nestable lock variable.
User's Guide Errata
-------------------
intrinthds={num_threads}
------------------------
The intrinthds runtime option now states the following:
Specifies the number of threads for parallel execution of the MATMUL and
RANDOM_NUMBER intrinsic procedures. The default value for num_threads
when using the MATMUL intrinsic is equal to the number of processors
online. The default value for num_threads when using the RANDOM_NUMBER
intrinsic is equal to the number of processors online*2.
Changing the number of threads available to the MATMUL and RANDOM_NUMBER
intrinsic procedures can influence performance.
-qstrict
--------
The introduction for the -qstrict compiler option now reads as follows:
Ensures that optimizations done by default with the -O3, -O4, -O5, -qhot,
and -qipa options, and optionally with the -O2 option, do not alter the
semantics of a program.
The first paragraphs of the following sections have also changed:
Defaults
For -O3, -O4, -O5, -qhot, and -qipa, the default is -qnostrict. For -O2,
the default is -qstrict. This option is ignored for -qnoopt. With
-qnostrict, optimizations may rearrange code so that results or exceptions
are different from those of unoptimized programs.
Rules
With -qnostrict in effect, the following optimizations are turned on,
unless -qstrict is also specified:
IV. XL Fortran for AIX 8.1.1.2 PTF
==================================
The XL Fortran for AIX 8.1.1.2 PTF contains one change which removes a
prerequisite from the install process. This PTF supports the same
compiler functionality as XL Fortran for AIX 8.1.1 with the 8.1.1.1 PTF
applied.
V. XL Fortran for AIX 8.1.1.1 PTF
=================================
User's Guide Errata
-------------------
MULTCONNIO runtime option
-------------------------
The MULTCONNIO runtime option now supports the following suboptions:
multconnio={ tty | nulldev | combined | no }
--
nulldev:
Enables you to connect the null device (/dev/null)
to more than one logical unit.
combined:
Specifies the combination of all the suboptions of
the MULTCONNIO run-time option except the 'no' suboption
The functionality of the tty and no suboptions remains unchanged.
VI. Known Limitations for IBM XL Fortran for AIX, V8.1.1
========================================================
Currently none.
VII. Documentation Corrections
==============================
User's Guide Errata and New Information
---------------------------------------
The following corrections and additions apply to the
IBM XL Fortran for AIX, Version 8.1.1 User's Guide:
-qdirectstorage Compiler Option
-------------------------------
Syntax:
-qdirectstorage | -qnodirectstorage
-----------------
This option informs the compiler that a given compilation unit may
reference write-through-enabled or cache-inhibited storage.
-qnodirectstorage is the default.
Use this option with discretion. It is intended for programmers who know
how the memory and cache blocks work, and how to tune their applications
for optimal performance. For a program to execute correctly on all
PowerPC implementations of cache organization, the programmer should
assume that separate instruction and data caches exist, and should program
to the separate cache model.
Note: Using the -qdirectstorage option together with the CACHE_ZERO
directive may cause your program to fail.
-qfullpath Example
------------------
In the example for the -qfullpath compiler option, "xldb" should be "dbx".
Embedding a Literal Comma in the -W String
------------------------------------------
You can use , to embed a literal comma in the string supplied to the -W
option.
In the following example, the , embeds a literal comma in the -WF string
and causes three arguments, rather than four, to be supplied to the C
preprocessor.
$ xlf -qfree=f90 '-WF,-Dint1=1,-Dint2=2,-Dlist=3,4' a.F
$ cat a.F
print *, int1
print *, int2
print *, list
end
Sample output:
$ ./a.out
1
2
3 4
XLSMPOPTS and Thread Stack Size Limits
--------------------------------------
The following should be added to the stack=num information:
Set stack=num so it is within the acceptable upper limit. num can be up to
256 MB for 32-bit mode, or up to the limit imposed by system resources for
64-bit mode. An application that exceeds the upper limit may cause a
segmentation fault.
Language Reference Errata and New Information
---------------------------------------------
The following corrections and additions apply to the
IBM XL Fortran for AIX, Version 8.1.1 Language Reference:
ENTRY Statement Rules - Allocatable result variables
----------------------------------------------------
In the fourth paragraph under "Rules" on page 352, the description:
Otherwise, they are storage-associated and must be all nonpointer
scalars of intrinsic (noncharacter) type.
should read "nonpointer, nonallocatable scalars" instead of "nonpointer
scalars".
RANDOM_SEED Intrinsic Procedure
-------------------------------
The RANDOM_SEED(PUT) description should have the following new information
added:
A valid seed must be a whole number between 1.0 and 2147483647.0 (2.0**31-1)
for Generator 1 and between 1.0 and 281474976710656.0 (2.0**48) for
Generator 2.
VIII. AS-IS Functions and/or Components
=======================================
The IBM Distributed Debugger is provided as a technology preview with the
XL Fortran for AIX product.
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