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

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Examples @process nullterm i = 1; j = 2; call printf("i=%d\n",%val(i)); call printf("i=%d, j=%d\n",%val(i),%val(j)); end Compiling this sample program would normally result in the following output: "t.f", line 4.36: 1513-029 (W) The number of arguments to "printf" differ from the number of arguments in a previous reference. You should use the OPTIONAL attribute and an explicit interface to define a procedure with optional arguments. ** _main === End of Compilation 1 === 1501-510 Compilation successful for file t.f. When the program is compiled with -qsuppress=1513-029, the output is: ** _main === End of Compilation 1 === 1501-510 Compilation successful for file t.f. Related Information For another type of message suppression, see “-qflag Option” on page 162. 246 XL Fortran Enterprise Edition for AIX : User’s Guide
-qswapomp Option Syntax -qswapomp | -qnoswapomp SWAPOMP | NOSWAPOMP Specifies that the compiler should recognize and substitute OpenMP routines in XL Fortran programs. The OpenMP routines for Fortran and C have different interfaces. To support multi-language applications that use OpenMP routines, the compiler needs to recognize OpenMP routine names and substitute them with the XL Fortran versions of these routines, regardless of the existence of other implementations of such routines. The compiler does not perform substitution of OpenMP routines when you specify the -qnoswapomp option. Restrictions The -qswapomp and -qnoswapomp options only affect Fortran sub-programs that reference OpenMP routines that exist in the program. Rules v If a call to an OpenMP routine resolves to a dummy procedure, module procedure, an internal procedure, a direct invocation of a procedure itself, or a statement function, the compiler will not perform the substitution. v v v When you specify an OpenMP routine, the compiler substitutes the call to a different special routine depending upon the setting of the -qintsize option. In this manner, OpenMP routines are treated as generic intrinsic procedures. Unlike generic intrinsic procedures, if you specify an OpenMP routine in an EXTERNAL statement, the compiler will not treat the name as a user-defined external procedure. Instead, the compiler will still substitute the call to a special routine depending upon the setting of the -qintsize option. An OpenMP routine cannot be extended or redefined, unlike generic intrinsic procedures. Examples In the following example, the OpenMP routines are declared in an INTERFACE statement. @PROCESS SWAPOMP INTERFACE FUNCTION OMP_GET_THREAD_NUM() INTEGER OMP_GET_THREAD_NUM END FUNCTION OMP_GET_THREAD_NUM FUNCTION OMP_GET_NUM_THREADS() INTEGER OMP_GET_NUM_THREADS END FUNCTION OMP_GET_NUM_THREADS END INTERFACE IAM = OMP_GET_THREAD_NUM() NP = OMP_GET_NUM_THREADS() PRINT *, IAM, NP END XL Fortran Compiler-Option Reference 247
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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
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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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Page 212 and 213: -qlog4 Option Syntax -qlog4 | -qnol
Page 214 and 215: Restrictions Depending on the sourc
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Page 218 and 219: -qmodule Option Syntax -qmodule=man
Page 220 and 221: -qnullterm Option Syntax -qnullterm
Page 222 and 223: -qonetrip Option Syntax -qonetrip |
Page 224 and 225: -qpdf Option Syntax -qpdf{1|2} Tune
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Page 228 and 229: -qphsinfo Option Syntax -qphsinfo |
Page 230 and 231: -qpic Option Syntax -qpic[=suboptio
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Page 236 and 237: -qrealsize Option Syntax -qrealsize
Page 238 and 239: -qrecur Option Syntax -qrecur | -qn
Page 240 and 241: To produce a listing file that you
Page 242 and 243: -qsave Option Syntax -qsave[={all|d
Page 244 and 245: -qsclk Option Syntax -qsclk[=centi
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Page 256 and 257: -qstrictieeemod Option Syntax -qstr
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Page 266 and 267: If you do not specify -qtune, its s
Page 268 and 269: -qundef Option Syntax -qundef | -qn
Page 270 and 271: -qunwind Option Syntax -qunwind |-q
Page 272 and 273: -qwarn64 Option See “-qwarn64 Opt
Page 274 and 275: -qxflag=xalias Option Syntax -qxfla
Page 276 and 277: intxor | nointxor Treats .XOR. as a
Page 278 and 279: Examples Consider the following pro
Page 280 and 281: In this example, conditional compil
Page 282 and 283: -qzerosize Option Syntax -qzerosize
Page 284 and 285: -t Option Syntax -tcomponents Appli
Page 286 and 287: -u Option Syntax -u UNDEF | NOUNDEF
Page 288 and 289: -V Option Syntax -V This option is
Page 290 and 291: $ ./a.out 1 2 3 4 276 XL Fortran En
Page 292 and 293: -y Option Syntax -y{n | m | p | z}
Page 294 and 295: 64-Bit Thread Support On AIX Versio
Page 296 and 297: -q64 Option Syntax -q64[=largetype]
Page 298 and 299: -qwarn64 Option Syntax -qwarn64 | -
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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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324 XL Fortran Enterprise Edition f
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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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