XL Fortran Enterprise Edition for AIX : User's Guide - IBM

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v /usr/share/man/info/en_US/xlf/postscript contains the PostScript format of the English XL Fortran publications. You must also copy the /etc/xlf.cfg file from the server to the client. The /etc directory contains the configuration files specific to a machine, and it should not be mounted from the server. Correct Settings for Environment Variables You can set and export a number of environment variables for use with the operating system. The following sections deal with the environment variables that have special significance to the XL Fortran compiler, application programs, or both. Environment Variable Basics You can set the environment variables from shell command lines or from within shell scripts. If you are not sure which shell is in use, a quick way to find out is to issue an echo $0. This provides a different result in each shell: $ sh $ echo $0 sh $ ksh $ echo $0 ksh $ csh % echo $0 No file for $0. % The Bourne shell path is /bin/sh, the Korn shell path is /bin/ksh, and the C shell path is /bin/csh. To set the environment variables so that everyone on the system has access to them, set the variables in the file /etc/profile (for the Bourne or the Korn shell), or set the variables in the file /etc/csh.login or in the file /etc/csh.cshrc (for the C shell). To set them for a specific user only, add the appropriate commands to the appropriate .profile or .cshrc file in the user’s home directory. The variables are set the next time the user logs on. For more information about setting environment variables, see the AIX Commands Reference. The following examples show how to set environment variables from various shells. From the Bourne or Korn shell: NLSPATH=/usr/lib/nls/msg/%L/%N:/usr/lib/nls/msg/prime/%N LANG=en_US TMPDIR=/home/joe/temp export LANG NLSPATH TMPDIR From the C shell: setenv LANG en_US setenv NLSPATH /usr/lib/nls/msg/%L/%N:/usr/lib/nls/msg/prime/%N setenv TMPDIR /home/joe/temp To display the contents of an environment variable, enter the command echo $var_name. 12 XL Fortran Enterprise Edition for AIX : User’s Guide
Note: For the remainder of this document, most examples of shell commands use ksh notation instead of repeating the syntax for all shells. Environment Variables for National Language Support Diagnostic messages and the listings from the compiler appear in the default language that was specified at installation of the operating system. If you want the messages and listings to appear in another language, you can set and export the following environment variables before executing the compiler: LANG NLSPATH Specifies the locale. A locale is divided into categories. Each category contains a specific aspect of the locale data. Setting LANG may change the national language for all the categories. Refers to a list of directory names where the message catalogs may be found. For example, to specify the Japanese locale with the IBM_eucJP code page, use the following commands from the Bourne or Korn shell: LANG=ja_JP NLSPATH=/usr/lib/nls/msg/%L/%N:/usr/lib/nls/msg/prime/%N export LANG NLSPATH Substitute any valid national language code for ja_JP, provided the associated message catalogs are installed. These environment variables are initialized when the operating system is installed and may be different from the ones that you want to use with the compiler. Each category has an environment variable associated with it. If you want to change the national language for a specific category but not for other categories, you can set and export the corresponding environment variable. For example: LC_MESSAGES Specifies the national language for the messages that are issued. It affects messages from the compiler and XLF-compiled programs, which may be displayed on the screen or stored in a listing, module, or other compiler output file. LC_TIME Specifies the national language for the time format category. It primarily affects the compiler listings. LC_CTYPE Defines character classification, case conversion, and other character attributes. For XL Fortran, it primarily affects the processing of multibyte characters. LC_NUMERIC Specifies the format to use for input and output of numeric values. Setting this variable in the shell does not affect either the compiler or XLF-compiled programs. The first I/O statement in a program sets the LC_NUMERIC category to POSIX. Therefore, programs that require a different setting must reset it after this point and should restore the setting to POSIX for all I/O statements. Setting Up and Customizing XL Fortran 13
Page 1: XL Fortran Enterprise Edition for A
Page 4 and 5: Note! Before using this information
Page 6 and 7: Options That Control Listings and M
Page 8 and 9: How XLF I/O Interacts with Pipes, S
Page 10 and 11: viii XL Fortran Enterprise Edition
Page 12 and 13: x XL Fortran Enterprise Edition for
Page 14 and 15: The following performance-related d
Page 16 and 17: How to Read the Syntax Diagrams and
Page 18 and 19: v Optionally, enter the value of at
Page 20 and 21: 6 XL Fortran Enterprise Edition for
Page 22 and 23: Migration Support The XL Fortran co
Page 24 and 25: These items are located, or accesse
Page 28 and 29: Notes: 1. Specifying the LC_ALL env
Page 30 and 31: 3. Installing a compiler program te
Page 32 and 33: fsuffix cppsuffix osuffix ssuffix l
Page 34 and 35: mcrt = /lib/mcrt0_r.o gcrt = /lib/g
Page 36 and 37: options include -L/usr/lpp/xlf/lib,
Page 38 and 39: Related Information: You can use th
Page 40 and 41: Table 1. Potential Problems Migrati
Page 42 and 43: Table 1. Potential Problems Migrati
Page 44 and 45: ►► xlf90 xlf90_r xlf90_r7 xlf95
Page 46 and 47: xlf90, xlf90_r, and xlf90_r7 comman
Page 48 and 49: Related Information: The ssuffix at
Page 50 and 51: Related Information: See “-qpdf O
Page 52 and 53: The @PROCESS compiler directive mus
Page 54 and 55: Passing Fortran Files through the C
Page 56 and 57: the trigraph sequence. XL Fortran u
Page 58 and 59: The configuration file /etc/xlf.cfg
Page 60 and 61: esulting program work as you expect
Page 62 and 63: v v Do not use names that are the s
Page 64 and 65: v v Build the application by using
Page 66 and 67: If you have applications in which F
Page 68 and 69: total_usertime Returns the total us
Page 70 and 71: To obtain support for items that ar
Page 72 and 73: Note: You may need the old setting
Page 74 and 75: These partitions are then assigned
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During the busy-wait search for wor
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(for example, loops for which you s
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Other Environment Variables That Af
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Options That Control Input to the C
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Table 3. Options That Control Input
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Table 5. Options for Performance Op
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Table 5. Options for Performance Op
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Table 6. Options for Debugging and
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Table 7. Options That Control Listi
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Table 8. Options for Compatibility
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v v Determine names and options for
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Detailed Descriptions of the XL For
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-1 Option Syntax -1 ONETRIP | NOONE
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-b64 Option Syntax -b64 The AIX ope
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Examples xlf95 f.f -brtl -bshared -
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-bloadmap Option Syntax -bloadmap:n
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-brtl Option Syntax -brtl | -bnortl
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-bstatic Option Related Information
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-c Option Syntax -c Prevents the co
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-d Option Syntax -d Causes preproce
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-g Option Syntax -g DBG | NODBG Gen
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-k Option Syntax -k FREE(F90) Speci
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-l Option Syntax -lkey Searches the
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-O Option Syntax -O[level] OPTimize
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-o Option Syntax -o name Specifies
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-p Option Syntax -p[g] Sets up the
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-q32 Option Related Information See
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-qalias Option Syntax -qalias={[no]
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equivalence (a, b(3)) t = b; a = t
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a derived type are stored with suff
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pwr2s p2sc You can run the executab
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v v If your primary concern is exec
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-qassert Option Syntax -qassert={de
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-qautodbl Option Syntax -qautodbl=s
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Related Information For background
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2 Level-2 cache or the table lookas
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-qcheck Option Syntax -qcheck | -qn
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-qcompact Option Syntax -qcompact |
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-qctyplss Option Syntax -qctyplss[(
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-qdbg Option Syntax -qdbg | -qnodbg
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-qdirective Option Syntax -qdirecti
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-qdirectstorage Option Syntax -qdir
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-qdpc Option Syntax -qdpc[=e] | -qn
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-qescape Option Syntax -qescape | -
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-qextchk Option Syntax -qextchk | -
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-qextname Option Syntax -qextname[=
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-qfdpr Option Syntax -qfdpr | -qnof
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-qflag Option Syntax -qflag=listing
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the reciprocal of the divisor. It a
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export SQRT_EXCEPTION=3.1 166 XL Fo
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-qfree Option Syntax -qfree[={f90|i
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-qhalt Option Syntax -qhalt=severit
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If you specify -qhot=novector, the
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-qhssngl Option Syntax -qhssngl | -
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-qinit Option Syntax -qinit=f90ptr
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v You can specify alphabetic digits
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-qintsize Option Syntax -qintsize=b
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-qipa Option Syntax -qipa[=suboptio
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If you specify short, the Object Fi
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Table 15. Regular expression syntax
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-qkeepparm Option Syntax -qkeepparm
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Restrictions The -qflag option can
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-qlibansi Option Related Informatio
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-qlibposix Option Related Informati
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-qlistopt Option Syntax -qlistopt |
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-qlog4 Option Syntax -qlog4 | -qnol
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Restrictions Depending on the sourc
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-qmixed Option Syntax -qmixed | -qn
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-qmodule Option Syntax -qmodule=man
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-qnullterm Option Syntax -qnullterm
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-qonetrip Option Syntax -qonetrip |
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-qpdf Option Syntax -qpdf{1|2} Tune
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mergepdf Generates a single pdf rec
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-qphsinfo Option Syntax -qphsinfo |
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-qpic Option Syntax -qpic[=suboptio
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sce | nosce } else if (a == 3) *res
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-qprefetch Option Syntax -qprefetch
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-qrealsize Option Syntax -qrealsize
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-qrecur Option Syntax -qrecur | -qn
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To produce a listing file that you
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-qsave Option Syntax -qsave[={all|d
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-qsclk Option Syntax -qsclk[=centi
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-qsigtrap Option Syntax -qsigtrap[=
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-qsmp Option Syntax -qsmp[=suboptio
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threshold=n The work in a partition
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xlf90 -qsmp=noopt -O3... is equival
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-qspillsize Option Syntax -qspillsi
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-qstrictieeemod Option Syntax -qstr
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-qsuffix Option Syntax -qsuffix=opt
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Examples @process nullterm i = 1; j
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Related Information See the OpenMP
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-qthreaded Option Syntax -qthreaded
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If you do not specify -qtune, its s
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-qundef Option Syntax -qundef | -qn
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-qunwind Option Syntax -qunwind |-q
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-qwarn64 Option See “-qwarn64 Opt
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-qxflag=xalias Option Syntax -qxfla
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intxor | nointxor Treats .XOR. as a
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Examples Consider the following pro
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In this example, conditional compil
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-qzerosize Option Syntax -qzerosize
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-t Option Syntax -tcomponents Appli
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-u Option Syntax -u UNDEF | NOUNDEF
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-V Option Syntax -V This option is
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$ ./a.out 1 2 3 4 276 XL Fortran En
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-y Option Syntax -y{n | m | p | z}
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64-Bit Thread Support On AIX Versio
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-q64 Option Syntax -q64[=largetype]
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-qwarn64 Option Syntax -qwarn64 | -
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286 XL Fortran Enterprise Edition f
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v v If the data or program code con
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v Comparisons involving NaN values
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How XL Fortran Rounds Floating-Poin
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2. For thread-safety and reentrancy
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v The fltint suboption speeds up fl
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There are other related operating s
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Another method is to use the ieee_s
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call fpgets(fpstat) fpstat(fpox) =
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The following example shows the dif
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v Code that might cause an exceptio
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Optimization levels Option -qnoopt/
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v -qcache=auto Optimization level -
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v v v Reducing the costs of memory
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Loop unrolling also increases code
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2. Run the application using a typi
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# Let the compiler decide (relative
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can also use the SNAPSHOT directive
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-qipa=list cross-file type checking
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Stream-access formatted files: A re
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I/O Redirection The important thing
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Default Record Lengths File Permiss
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XLFRTEOPTS="unit_vars=yes" # Allow
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Logical Volume I/O To use a logical
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READ(unit_number,ID=idvar) a .... W
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450 end do close(20) end Performanc
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Table 22. Table for Binding an Appl
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v The result of an application does
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Sometimes an application can guaran
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v v The XL compilers generate code
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#include template class junk { pri
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Notes: 1. In interlanguage communic
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Table 25. Escape Sequences for Char
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You can use this built-in function
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The system linkage convention passe
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Run-time Stack for 32-bit Environme
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processing, and the fifth doublewor
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v v v v v v v In a 32-bit Environme
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Will Be Passed In: R3 0 Storage Map
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Function Values Functions return th
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Example The control structure has t
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technique can reduce the amount of
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Note: When you run an XL Fortran pr
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Duplicating Extensions from Other S
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Input/Output Errors If the error de
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-> xlf95 -qddim -g testprog.f -o te
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7. The next step is to research why
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Note that you cannot use the -qextn
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v v Memory leak reporting that indi
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HD_FILL HD_STACK=n called a certain
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Source Section The source section c
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Attribute and Cross-Reference Secti
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Automating Large, Complex Compilati
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For fixed source form code, in addi
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Common Industry Extensions That XL
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Example 2 - Valid C Routine Source
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close(10) open(10, file="fun10.out"
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!**********************************
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operating system require the same o
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Examples of Storage Relationships f
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0 4 8 16 32 64 COMPLEX (16) COMPLEX
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! Data values between r8 and x16 ar
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end function sqrt real*8 function r
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Table 34. MASS Vector Library Funct
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IBM may use or distribute any of th
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ind. To relate an identifier to ano
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expression. A sequence of operands,
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name. A lexical token consisting of
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labels can be used to transfer cont
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.profile file 12 .s files 33, 34 .X
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fdate_ service and utility subprogr
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nonested_par suboption of -qsmp 234
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vi text editor 29 W W error severit
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