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

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-bloadmap Option Syntax -bloadmap:name Requests that a log of linker actions and messages be saved in file name. You can use the log to help diagnose linking problems. For example, the log contains information about type mismatches that the -qextchk option detected. Rules This option is passed directly to the ld command and is not processed by XL Fortran at all. 98 XL Fortran Enterprise Edition for AIX : User’s Guide
-bmaxdata, -bmaxstack Options Syntax -bmaxdata:bytes -bmaxstack:bytes Specifies the maximum amount of space to reserve for the program data segment and stack segment for programs where the size of these regions is a constraint. Background Information The data segment holds, among other things, heap storage that is used by the program. If your program allocates large arrays, statically or dynamically, specify -bmaxdata when linking the program. The resulting executable program uses the large data model and can have a data region larger than a single segment, up to a maximum of 2 GB. Refer to the ld documentation in the AIX Commands Reference for allowable values. Note that since the compiler might create temporary arrays during compilation, it may be useful to define a value for the -bmaxdata compiler option in anticipation of this. If the program has large amounts of automatic data or otherwise exceeds the soft limit on stack size for a program, specify -bmaxstack when you link the program. Use this option to define the soft limit up to 256 MB for 32-bit mode or up to the limit imposed by system resources for 64-bit mode. However, each main program or subprogram is limited to 256 MB per instance. Arguments You can specify the size as a decimal, octal (which is prefixed by 0), or hexadecimal value (which is prefixed by 0x). Rules These options are passed directly to the ld command and are not processed by XL Fortran at all. Examples xlf95 -O3 -qhot -bmaxdata:0x20000000 huge_data_model.f xlf95 -O3 -qhot -bmaxstack:2000000 lots_of_automatic_data.f Related Information For a discussion of the issues involved in creating large AIX programs, see “Large Program Support Overview” in AIX General Programming Concepts. XL Fortran Compiler-Option Reference 99
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XL Fortran Enterprise Edition for A
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Note! Before using this information
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Options That Control Listings and M
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How XLF I/O Interacts with Pipes, S
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viii XL Fortran Enterprise Edition
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x XL Fortran Enterprise Edition for
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The following performance-related d
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How to Read the Syntax Diagrams and
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v Optionally, enter the value of at
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6 XL Fortran Enterprise Edition for
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Migration Support The XL Fortran co
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These items are located, or accesse
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v /usr/share/man/info/en_US/xlf/pos
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Notes: 1. Specifying the LC_ALL env
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3. Installing a compiler program te
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fsuffix cppsuffix osuffix ssuffix l
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mcrt = /lib/mcrt0_r.o gcrt = /lib/g
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options include -L/usr/lpp/xlf/lib,
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Related Information: You can use th
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Table 1. Potential Problems Migrati
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Table 1. Potential Problems Migrati
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►► xlf90 xlf90_r xlf90_r7 xlf95
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xlf90, xlf90_r, and xlf90_r7 comman
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Related Information: The ssuffix at
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Related Information: See “-qpdf O
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The @PROCESS compiler directive mus
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Passing Fortran Files through the C
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the trigraph sequence. XL Fortran u
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The configuration file /etc/xlf.cfg
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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
Page 78 and 79: (for example, loops for which you s
Page 80 and 81: Other Environment Variables That Af
Page 82 and 83: Options That Control Input to the C
Page 84 and 85: Table 3. Options That Control Input
Page 86 and 87: Table 5. Options for Performance Op
Page 88 and 89: Table 5. Options for Performance Op
Page 90 and 91: Table 6. Options for Debugging and
Page 92 and 93: Table 7. Options That Control Listi
Page 94 and 95: Table 8. Options for Compatibility
Page 102 and 103: v v Determine names and options for
Page 104 and 105: Detailed Descriptions of the XL For
Page 106 and 107: -1 Option Syntax -1 ONETRIP | NOONE
Page 108 and 109: -b64 Option Syntax -b64 The AIX ope
Page 110 and 111: Examples xlf95 f.f -brtl -bshared -
Page 114 and 115: -brtl Option Syntax -brtl | -bnortl
Page 116 and 117: -bstatic Option Related Information
Page 118 and 119: -c Option Syntax -c Prevents the co
Page 120 and 121: -d Option Syntax -d Causes preproce
Page 122 and 123: -g Option Syntax -g DBG | NODBG Gen
Page 124 and 125: -k Option Syntax -k FREE(F90) Speci
Page 126 and 127: -l Option Syntax -lkey Searches the
Page 128 and 129: -O Option Syntax -O[level] OPTimize
Page 130 and 131: -o Option Syntax -o name Specifies
Page 132 and 133: -p Option Syntax -p[g] Sets up the
Page 134 and 135: -q32 Option Related Information See
Page 136 and 137: -qalias Option Syntax -qalias={[no]
Page 138 and 139: equivalence (a, b(3)) t = b; a = t
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Page 142 and 143: pwr2s p2sc You can run the executab
Page 144 and 145: v v If your primary concern is exec
Page 146 and 147: -qassert Option Syntax -qassert={de
Page 148 and 149: -qautodbl Option Syntax -qautodbl=s
Page 150 and 151: Related Information For background
Page 152 and 153: 2 Level-2 cache or the table lookas
Page 154 and 155: -qcheck Option Syntax -qcheck | -qn
Page 156 and 157: -qcompact Option Syntax -qcompact |
Page 158 and 159: -qctyplss Option Syntax -qctyplss[(
Page 160 and 161: -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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XL Fortran Enterprise Edition for AIX : User's Guide - IBM

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