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

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3. Installing a compiler program temporary fix (PTF) or an upgrade may overwrite the /etc/xlf.cfg file. Therefore, be sure to save a copy of any modifications you have made before doing such an installation. 4. If you upgrade the operating system, you must change the symbolic link in /etc/xlf.cfg to point to the correct version of the configuration file. 5. You cannot use tabs as separator characters in the configuration file. If you modify the configuration file, make sure that you use spaces for any indentation. 6. The xlf_r, xlf90_r, and xlf95_r stanzas support the operating system default thread interface: that is, the POSIX1003.1-1996 standard for AIX Version 5.1 and higher levels of the AIX operating system. 7. If you are mixing Message-Passing Interface (MPI) and threaded programming, use the appropriate stanza in the xlf.cfg file to link in the proper libraries and to set the correct default behavior: mpxlf mpxlf_r mpxlf_r7 mpxlf90 mpxlf90_r mpxlf90_r7 mpxlf95 mpxlf95_r mpxlf95_r7 Specifies xlf and f77 behavior when using MPI. Specifies xlf_r behavior when mixing MPI and threaded programming. You access this stanza by specifying the mpxlf_r command. Specifies xlf_r7 behavior when mixing MPI and threaded programming. You access this stanza by specifying the mpxlf_r command with the -d7 option. The level of POSIX pthreads API support is Draft 7. Specifies xlf90 behavior when using MPI. Specifies xlf90_r behavior when mixing MPI and threaded programming. You access this stanza by specifying the mpxlf90_r command. Specifies xlf90_r7 behavior when mixing MPI and threaded programming. You access this stanza by specifying the mpxlf90_r command with the -d7 option. The level of POSIX pthreads API support is Draft 7. Specifies xlf95 behavior when using MPI. Specifies xlf95_r behavior when mixing MPI and threaded programming. You access this stanza by specifying the mpxlf95_r command. Specifies xlf95_r7 behavior when mixing MPI and threaded programming. You access this stanza by specifying the mpxlf95_r command with the -d7 option. The level of POSIX pthreads API support is Draft 7. Attributes The configuration file contains the following attributes: use crt crt_64 The named and local stanzas provide the values for attributes. For single-valued attributes, values in the use attribute apply if there is no value in the local, or default, stanza. For comma-separated lists, the values from the use attribute are added to the values from the local stanza. You can only use a single level of the use attribute. Do not specify a use attribute that names a stanza with another use attribute. When invoked in 32-bit mode, the default (which is the path name of the object file that contains the startup code), passed as the first parameter to the linkage editor. When invoked in 64-bit mode, using -q64 for example, the path 16 XL Fortran Enterprise Edition for AIX : User’s Guide
name of the object file that contains the startup code, passed as the first parameter to the linkage editor. mcrt Same as for crt, but the object file contains profiling code for the -p option. mcrt_64 gcrt gcrt_64 cpp xlf code xlfopt as asopt ld ldopt options cppoptions Same as for crt_64, but the object file contains profiling code for the -p option. Same as crt, but the object file contains profiling code for the -pg option. Same as crt_64, but the object file contains profiling code for the -pg option. The absolute path name of the C preprocessor, which is automatically called for files ending with a specific suffix (usually .F). The absolute path name of the main compiler executable file. The compiler commands are driver programs that execute this file. The absolute path name of the optimizing code generator. Lists names of options that are assumed to be compiler options, for cases where, for example, a compiler option and a linker option use the same letter. The list is a concatenated set of single-letter flags. Any flag that takes an argument is followed by a colon, and the whole list is enclosed by double quotation marks. The absolute path name of the assembler. Lists names of options that are assumed to be assembler options for cases where, for example, a compiler option and an assembler option use the same letter. The list is a concatenated set of single-letter flags. Any flag that takes an argument is followed by a colon, and the whole list is enclosed by double quotation marks. You may find it more convenient to set up this attribute than to pass options to the assembler through the -W compiler option. The absolute path name of the linker. Lists names of options that are assumed to be linker options for cases where, for example, a compiler option and a linker option use the same letter. The list is a concatenated set of single-letter flags. Any flag that takes an argument is followed by a colon, and the whole list is enclosed by double quotation marks. You may find it more convenient to set up this attribute than to pass options to the linker through the -W compiler option. However, most unrecognized options are passed to the linker anyway. A string of options that are separated by commas. The compiler processes these options as if you entered them on the command line before any other option. This attribute lets you shorten the command line by including commonly used options in one central place. A string of options that are separated by commas, to be processed by cpp (the C preprocessor) as if you entered them on the command line before any other option. This attribute is needed because some cpp options are usually required to produce output Setting Up and Customizing XL Fortran 17
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 26 and 27: v /usr/share/man/info/en_US/xlf/pos
Page 28 and 29: Notes: 1. Specifying the LC_ALL env
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
Page 76 and 77: During the busy-wait search for wor
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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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