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

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-qdbg Option Syntax -qdbg | -qnodbg DBG | NODBG -qdbg is the long form of the “-g Option” on page 108. 146 XL Fortran Enterprise Edition for AIX : User’s Guide
-qddim Option Syntax -qddim | -qnoddim DDIM | NODDIM Specifies that the bounds of pointee arrays are re-evaluated each time the arrays are referenced and removes some restrictions on the bounds expressions for pointee arrays. Rules By default, a pointee array can only have dimension declarators containing variable names if the array appears in a subprogram, and any variables in the dimension declarators must be dummy arguments, members of a common block, or use- or host-associated. The size of the dimension is evaluated on entry to the subprogram and remains constant during execution of the subprogram. With the -qddim option: v The bounds of a pointee array are re-evaluated each time the pointee is referenced. This process is called dynamic dimensioning. Because the variables in the declarators are evaluated each time the array is referenced, changing the values of the variables changes the size of the pointee array. v The restriction on the variables that can appear in the array declarators is lifted, so ordinary local variables can be used in these expressions. v Pointee arrays in the main program can also have variables in their array declarators. Examples @PROCESS DDIM INTEGER PTE, N, ARRAY(10) POINTER (P, PTE(N)) DO I=1, 10 ARRAY(I)=I END DO N = 5 P = LOC(ARRAY(2)) PRINT *, PTE ! Print elements 2 through 6. N = 7 ! Increase the size. PRINT *, PTE ! Print elements 2 through 8. END XL Fortran Compiler-Option Reference 147
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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
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v v Do not use names that are the s
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v v Build the application by using
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If you have applications in which F
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total_usertime Returns the total us
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To obtain support for items that ar
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Note: You may need the old setting
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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
Page 110 and 111: Examples xlf95 f.f -brtl -bshared -
Page 112 and 113: -bloadmap Option Syntax -bloadmap:n
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 162 and 163: -qdirective Option Syntax -qdirecti
Page 164 and 165: -qdirectstorage Option Syntax -qdir
Page 166 and 167: -qdpc Option Syntax -qdpc[=e] | -qn
Page 168 and 169: -qescape Option Syntax -qescape | -
Page 170 and 171: -qextchk Option Syntax -qextchk | -
Page 172 and 173: -qextname Option Syntax -qextname[=
Page 174 and 175: -qfdpr Option Syntax -qfdpr | -qnof
Page 176 and 177: -qflag Option Syntax -qflag=listing
Page 178 and 179: the reciprocal of the divisor. It a
Page 180 and 181: export SQRT_EXCEPTION=3.1 166 XL Fo
Page 182 and 183: -qfree Option Syntax -qfree[={f90|i
Page 184 and 185: -qhalt Option Syntax -qhalt=severit
Page 186 and 187: If you specify -qhot=novector, the
Page 188 and 189: -qhssngl Option Syntax -qhssngl | -
Page 190 and 191: -qinit Option Syntax -qinit=f90ptr
Page 192 and 193: v You can specify alphabetic digits
Page 194 and 195: -qintsize Option Syntax -qintsize=b
Page 196 and 197: -qipa Option Syntax -qipa[=suboptio
Page 198 and 199: If you specify short, the Object Fi
Page 200 and 201: Table 15. Regular expression syntax
Page 202 and 203: -qkeepparm Option Syntax -qkeepparm
Page 204 and 205: Restrictions The -qflag option can
Page 206 and 207: -qlibansi Option Related Informatio
Page 208 and 209: -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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