gcc/fortran/lang.opt

   1 ; Options for the Fortran 95 front end.
   2 ; Copyright (C) 2003-2014 Free Software Foundation, Inc.
   3 ;
   4 ; This file is part of GCC.
   5 ;
   6 ; GCC is free software; you can redistribute it and/or modify it under
   7 ; the terms of the GNU General Public License as published by the Free
   8 ; Software Foundation; either version 3, or (at your option) any later
   9 ; version.
  10 ;
  11 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 ; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 ; for more details.
  15 ;
  16 ; You should have received a copy of the GNU General Public License
  17 ; along with GCC; see the file COPYING3.  If not see
  18 ; <http://www.gnu.org/licenses/>.
  19
  20 ; See the GCC internals manual for a description of this file's format.
  21
  22 ; Please try to keep this file in ASCII collating order.
  23
  24 Language
  25 Fortran
  26
  27 -all-warnings
  28 Fortran Alias(Wall)
  29
  30 -assert
  31 Fortran Separate Alias(A)
  32
  33 -assert=
  34 Fortran Joined Alias(A)
  35
  36 -comments
  37 Fortran Alias(C)
  38
  39 -comments-in-macros
  40 Fortran Alias(CC)
  41
  42 -define-macro
  43 Fortran Separate Alias(D)
  44
  45 -define-macro=
  46 Fortran Joined Alias(D)
  47
  48 -dependencies
  49 Fortran Alias(M)
  50
  51 -dump
  52 Fortran Separate Alias(d)
  53
  54 -dump=
  55 Fortran Joined Alias(d)
  56
  57 -include-barrier
  58 Fortran Alias(I, -)
  59
  60 -include-directory
  61 Fortran Separate Alias(I)
  62
  63 -include-directory=
  64 Fortran Joined Alias(I)
  65
  66 -include-directory-after
  67 Fortran Separate Alias(idirafter)
  68
  69 -include-directory-after=
  70 Fortran Joined Alias(idirafter)
  71
  72 -include-prefix
  73 Fortran Separate Alias(iprefix)
  74
  75 -include-prefix=
  76 Fortran JoinedOrMissing Alias(iprefix)
  77
  78 -no-line-commands
  79 Fortran Alias(P)
  80
  81 -no-standard-includes
  82 Fortran Alias(nostdinc)
  83
  84 -output
  85 Fortran Separate Alias(o)
  86
  87 -output=
  88 Fortran Joined Alias(o)
  89
  90 -preprocess
  91 Fortran Undocumented Alias(E)
  92
  93 -print-missing-file-dependencies
  94 Fortran Alias(MG)
  95
  96 -trace-includes
  97 Fortran Alias(H)
  98
  99 -undefine-macro
 100 Fortran Separate Alias(U)
 101
 102 -undefine-macro=
 103 Fortran Joined Alias(U)
 104
 105 -user-dependencies
 106 Fortran Alias(MM)
 107
 108 -verbose
 109 Fortran Alias(v)
 110
 111 -write-dependencies
 112 Fortran NoDriverArg Separate Alias(MD)
 113
 114 -write-user-dependencies
 115 Fortran NoDriverArg Separate Alias(MMD)
 116
 117 A
 118 Fortran Joined Separate
 119 ; Documented in C
 120
 121 C
 122 Fortran
 123 ; Documented in C
 124
 125 CC
 126 Fortran
 127 ; Documented in C
 128
 129 D
 130 Fortran Joined Separate
 131 ; Documented in C
 132
 133 E
 134 Fortran Undocumented
 135
 136 H
 137 Fortran
 138 ; Documented in C
 139
 140 I
 141 Fortran Joined Separate
 142 ; Documented in C
 143
 144 J
 145 Fortran Joined Separate
 146 -J<directory>   Put MODULE files in 'directory'
 147
 148 M
 149 Fortran
 150 ; Documented in C
 151
 152 MD
 153 Fortran Separate NoDriverArg
 154 ; Documented in C
 155
 156 MF
 157 Fortran Joined Separate
 158 ; Documented in C
 159
 160 MG
 161 Fortran
 162 ; Documented in C
 163
 164 MM
 165 Fortran
 166 ; Documented in C
 167
 168 MMD
 169 Fortran Separate NoDriverArg
 170 ; Documented in C
 171
 172 MP
 173 Fortran
 174 ; Documented in C
 175
 176 MT
 177 Fortran Joined Separate
 178 ; Documented in C
 179
 180 MQ
 181 Fortran Joined Separate
 182 ; Documented in C
 183
 184 P
 185 Fortran
 186 ; Documented in C
 187
 188 U
 189 Fortran Joined Separate
 190 ; Documented in C
 191
 192 Wall
 193 Fortran
 194 ; Documented in C
 195
 196 Waliasing
 197 Fortran Warning Var(warn_aliasing) LangEnabledBy(Fortran,Wall)
 198 Warn about possible aliasing of dummy arguments
 199
 200 Walign-commons
 201 Fortran Warning Var(warn_align_commons) Init(1)
 202 Warn about alignment of COMMON blocks
 203
 204 Wampersand
 205 Fortran Warning Var(warn_ampersand) LangEnabledBy(Fortran,Wall || Wpedantic)
 206 Warn about missing ampersand in continued character constants
 207
 208 Warray-temporaries
 209 Fortran Warning Var(warn_array_temporaries)
 210 Warn about creation of array temporaries
 211
 212 Wc-binding-type
 213 Fortran Var(warn_c_binding_type) Warning LangEnabledBy(Fortran,Wall)
 214 Warn if the type of a variable might be not interoperable with C
 215
 216 Wdate-time
 217 Fortran
 218 ; Documented in C
 219
 220 Wcharacter-truncation
 221 Fortran Var(warn_character_truncation) Warning LangEnabledBy(Fortran,Wall)
 222 Warn about truncated character expressions
 223
 224 Wcompare-reals
 225 Fortran Warning Var(warn_compare_reals) LangEnabledBy(Fortran,Wextra)
 226 Warn about equality comparisons involving REAL or COMPLEX expressions
 227
 228 Wconversion
 229 Fortran Var(warn_conversion) Warning LangEnabledBy(Fortran,Wall)
 230 ; Documented in C
 231
 232 Wconversion-extra
 233 Fortran Var(warn_conversion_extra) Warning
 234 Warn about most implicit conversions
 235
 236 Wextra
 237 Fortran Warning
 238 ; Documented in common
 239
 240 Wfunction-elimination
 241 Fortran Warning Var(warn_function_elimination)
 242 Warn about function call elimination
 243
 244 Wimplicit-interface
 245 Fortran Warning Var(warn_implicit_interface)
 246 Warn about calls with implicit interface
 247
 248 Wimplicit-procedure
 249 Fortran Warning Var(warn_implicit_procedure)
 250 Warn about called procedures not explicitly declared
 251
 252 Wline-truncation
 253 Fortran Warning Var(warn_line_truncation) LangEnabledBy(Fortran,Wall)
 254 Warn about truncated source lines
 255
 256 Wintrinsics-std
 257 Fortran Var(warn_intrinsics_std) Warning LangEnabledBy(Fortran,Wall)
 258 Warn on intrinsics not part of the selected standard
 259
 260 Wmaybe-uninitialized
 261 Fortran LangEnabledBy(Fortran,Wall)
 262 ; Documented in common.opt
 263
 264 Wmissing-include-dirs
 265 Fortran
 266 ; Documented in C/C++
 267
 268 Wuse-without-only
 269 Fortran Var(warn_use_without_only) Warning
 270 Warn about USE statements that have no ONLY qualifier
 271
 272 Wopenmp-simd
 273 Fortran
 274 ; Documented in C
 275
 276 Wpedantic
 277 Fortran
 278 ; Documented in common.opt
 279
 280 Wreal-q-constant
 281 Fortran Warning Var(warn_real_q_constant) LangEnabledBy(Fortran,Wall)
 282 Warn about real-literal-constants with 'q' exponent-letter
 283
 284 Wrealloc-lhs
 285 Fortran Warning Var(warn_realloc_lhs) LangEnabledBy(Fortran,Wrealloc-lhs-all)
 286 Warn when a left-hand-side array variable is reallocated
 287
 288 Wrealloc-lhs-all
 289 Fortran Warning Var(warn_realloc_lhs_all)
 290 Warn when a left-hand-side variable is reallocated
 291
 292 Wtarget-lifetime
 293 Fortran Warning Var(warn_target_lifetime) LangEnabledBy(Fortran,Wall)
 294 Warn if the pointer in a pointer assignment might outlive its target
 295
 296 Wreturn-type
 297 Fortran Warning LangEnabledBy(Fortran,Wall)
 298 ; Documented in C
 299
 300 Wsurprising
 301 Fortran Warning Var(warn_surprising) LangEnabledBy(Fortran,Wall)
 302 Warn about \"suspicious\" constructs
 303
 304 Wtabs
 305 Fortran Warning Var(warn_tabs) LangEnabledBy(Fortran,Wall || Wpedantic)
 306 Permit nonconforming uses of the tab character
 307
 308 Wunderflow
 309 Fortran Warning Var(warn_underflow) Init(1)
 310 Warn about underflow of numerical constant expressions
 311
 312 Wuninitialized
 313 Fortran LangEnabledBy(Fortran,Wall)
 314 ; Documented in common.opt
 315
 316 Wintrinsic-shadow
 317 Fortran Warning Var(warn_intrinsic_shadow) LangEnabledBy(Fortran,Wall)
 318 Warn if a user-procedure has the same name as an intrinsic
 319
 320 Wunused
 321 LangEnabledBy(Fortran,Wall)
 322 ; Documented in common.opt
 323
 324 Wunused-dummy-argument
 325 Fortran Warning Var(warn_unused_dummy_argument) LangEnabledBy(Fortran,Wall)
 326 Warn about unused dummy arguments.
 327
 328 Wzerotrip
 329 Fortran Warning Var(warn_zerotrip) LangEnabledBy(Fortran,Wall)
 330 Warn about zero-trip DO loops
 331
 332 cpp
 333 Fortran Negative(nocpp)
 334 Enable preprocessing
 335
 336 cpp=
 337 Fortran Joined Negative(nocpp) Undocumented NoDWARFRecord
 338 ; Internal option generated by specs from -cpp.
 339
 340 nocpp
 341 Fortran Negative(cpp)
 342 Disable preprocessing
 343
 344 d
 345 Fortran Joined
 346 ; Documented in common.opt
 347
 348 faggressive-function-elimination
 349 Fortran
 350 Eliminate multiple function invokations also for impure functions
 351
 352 falign-commons
 353 Fortran
 354 Enable alignment of COMMON blocks
 355
 356 fall-intrinsics
 357 Fortran RejectNegative
 358 All intrinsics procedures are available regardless of selected standard
 359
 360 fallow-leading-underscore
 361 Fortran Undocumented
 362 ; For internal use only: allow the first character of symbol names to be an underscore
 363
 364 fautomatic
 365 Fortran
 366 Do not treat local variables and COMMON blocks as if they were named in SAVE statements
 367
 368 fbackslash
 369 Fortran
 370 Specify that backslash in string introduces an escape character
 371
 372 fbacktrace
 373 Fortran
 374 Produce a backtrace when a runtime error is encountered
 375
 376 fblas-matmul-limit=
 377 Fortran RejectNegative Joined UInteger
 378 -fblas-matmul-limit=<n> Size of the smallest matrix for which matmul will use BLAS
 379
 380 fcheck-array-temporaries
 381 Fortran
 382 Produce a warning at runtime if a array temporary has been created for a procedure argument
 383
 384 fconvert=big-endian
 385 Fortran RejectNegative
 386 Use big-endian format for unformatted files
 387
 388 fconvert=little-endian
 389 Fortran RejectNegative
 390 Use little-endian format for unformatted files
 391
 392 fconvert=native
 393 Fortran RejectNegative
 394 Use native format for unformatted files
 395
 396 fconvert=swap
 397 Fortran RejectNegative
 398 Swap endianness for unformatted files
 399
 400 fcray-pointer
 401 Fortran
 402 Use the Cray Pointer extension
 403
 404 fd-lines-as-code
 405 Fortran RejectNegative
 406 Ignore 'D' in column one in fixed form
 407
 408 fd-lines-as-comments
 409 Fortran RejectNegative
 410 Treat lines with 'D' in column one as comments
 411
 412 fdefault-double-8
 413 Fortran Var(flag_default_double)
 414 Set the default double precision kind to an 8 byte wide type
 415
 416 fdefault-integer-8
 417 Fortran Var(flag_default_integer)
 418 Set the default integer kind to an 8 byte wide type
 419
 420 fdefault-real-8
 421 Fortran Var(flag_default_real)
 422 Set the default real kind to an 8 byte wide type
 423
 424 fdollar-ok
 425 Fortran
 426 Allow dollar signs in entity names
 427
 428 fdump-core
 429 Fortran Ignore
 430 Does nothing. Preserved for backward compatibility.
 431
 432 fdump-fortran-original
 433 Fortran
 434 Display the code tree after parsing
 435
 436 fdump-fortran-optimized
 437 Fortran
 438 Display the code tree after front end optimization
 439
 440 fdump-parse-tree
 441 Fortran
 442 Display the code tree after parsing; deprecated option
 443
 444 fexternal-blas
 445 Fortran
 446 Specify that an external BLAS library should be used for matmul calls on large-size arrays
 447
 448 ff2c
 449 Fortran
 450 Use f2c calling convention
 451
 452 ffixed-form
 453 Fortran RejectNegative
 454 Assume that the source file is fixed form
 455
 456 finteger-4-integer-8
 457 Fortran RejectNegative Var(flag_integer4_kind,8)
 458 Interpret any INTEGER(4) as an INTEGER(8)
 459
 460 fintrinsic-modules-path
 461 Fortran RejectNegative Separate
 462 Specify where to find the compiled intrinsic modules
 463
 464 fintrinsic-modules-path=
 465 Fortran RejectNegative Joined
 466 Specify where to find the compiled intrinsic modules
 467
 468 ffixed-line-length-none
 469 Fortran RejectNegative Var(flag_fixed_line_length,0)
 470 Allow arbitrary character line width in fixed mode
 471
 472 ffixed-line-length-
 473 Fortran RejectNegative Joined UInteger Var(flag_fixed_line_length) Init(72)
 474 -ffixed-line-length-<n> Use n as character line width in fixed mode
 475
 476 ffpe-trap=
 477 Fortran RejectNegative JoinedOrMissing
 478 -ffpe-trap=[...]        Stop on following floating point exceptions
 479
 480 ffpe-summary=
 481 Fortran RejectNegative JoinedOrMissing
 482 -ffpe-summary=[...]     Print summary of floating point exceptions
 483
 484 ffree-form
 485 Fortran RejectNegative
 486 Assume that the source file is free form
 487
 488 ffree-line-length-none
 489 Fortran RejectNegative Var(flag_free_line_length,0)
 490 Allow arbitrary character line width in free mode
 491
 492 ffree-line-length-
 493 Fortran RejectNegative Joined UInteger Var(flag_free_line_length) Init(132)
 494 -ffree-line-length-<n>  Use n as character line width in free mode
 495
 496 ffrontend-optimize
 497 Fortran Var(flag_frontend_optimize) Init(-1)
 498 Enable front end optimization
 499
 500 fimplicit-none
 501 Fortran
 502 Specify that no implicit typing is allowed, unless overridden by explicit IMPLICIT statements
 503
 504 finit-character=
 505 Fortran RejectNegative Joined UInteger
 506 -finit-character=<n>    Initialize local character variables to ASCII value n
 507
 508 finit-integer=
 509 Fortran RejectNegative Joined
 510 -finit-integer=<n>      Initialize local integer variables to n
 511
 512 finit-local-zero
 513 Fortran
 514 Initialize local variables to zero (from g77)
 515
 516 finit-logical=
 517 Fortran RejectNegative Joined
 518 -finit-logical=<true|false>     Initialize local logical variables
 519
 520 finit-real=
 521 Fortran RejectNegative Joined
 522 -finit-real=<zero|nan|inf|-inf> Initialize local real variables
 523
 524 fmax-array-constructor=
 525 Fortran RejectNegative Joined UInteger
 526 -fmax-array-constructor=<n>     Maximum number of objects in an array constructor
 527
 528 fmax-identifier-length=
 529 Fortran RejectNegative Joined UInteger
 530 -fmax-identifier-length=<n>     Maximum identifier length
 531
 532 fmax-subrecord-length=
 533 Fortran RejectNegative Joined UInteger Var(flag_max_subrecord_length)
 534 -fmax-subrecord-length=<n>      Maximum length for subrecords
 535
 536 fmax-stack-var-size=
 537 Fortran RejectNegative Joined UInteger Var(flag_max_stack_var_size) Init(-2)
 538 -fmax-stack-var-size=<n>        Size in bytes of the largest array that will be put on the stack
 539
 540 fstack-arrays
 541 Fortran Var(flag_stack_arrays) Init(-1)
 542 Put all local arrays on stack.
 543
 544 fmodule-private
 545 Fortran
 546 Set default accessibility of module entities to PRIVATE.
 547
 548 fopenmp
 549 Fortran
 550 ; Documented in C
 551
 552 fopenmp-simd
 553 Fortran
 554 ; Documented in C
 555
 556 fpack-derived
 557 Fortran
 558 Try to lay out derived types as compactly as possible
 559
 560 fpreprocessed
 561 Fortran
 562 ; Documented in C
 563
 564 fprotect-parens
 565 Fortran Var(flag_protect_parens) Init(-1)
 566 Protect parentheses in expressions
 567
 568 frange-check
 569 Fortran
 570 Enable range checking during compilation
 571
 572 freal-4-real-8
 573 Fortran RejectNegative Var(flag_real4_kind,8)
 574 Interpret any REAL(4) as a REAL(8)
 575
 576 freal-4-real-10
 577 Fortran RejectNegative Var(flag_real4_kind,10)
 578 Interpret any REAL(4) as a REAL(10)
 579
 580 freal-4-real-16
 581 Fortran RejectNegative Var(flag_real4_kind,16)
 582 Interpret any REAL(4) as a REAL(16)
 583
 584 freal-8-real-4
 585 Fortran RejectNegative Var(flag_real8_kind,4)
 586 Interpret any REAL(8) as a REAL(4)
 587
 588 freal-8-real-10
 589 Fortran RejectNegative Var(flag_real8_kind,10)
 590 Interpret any REAL(8) as a REAL(10)
 591
 592 freal-8-real-16
 593 Fortran RejectNegative Var(flag_real8_kind,16)
 594 Interpret any REAL(8) as a REAL(16)
 595
 596 frealloc-lhs
 597 Fortran Var(flag_realloc_lhs) Init(-1)
 598 Reallocate the LHS in assignments
 599
 600 frecord-marker=4
 601 Fortran RejectNegative Var(flag_record_marker,4)
 602 Use a 4-byte record marker for unformatted files
 603
 604 frecord-marker=8
 605 Fortran RejectNegative Var(flag_record_marker,8)
 606 Use an 8-byte record marker for unformatted files
 607
 608 frecursive
 609 Fortran
 610 Allocate local variables on the stack to allow indirect recursion
 611
 612 frepack-arrays
 613 Fortran
 614 Copy array sections into a contiguous block on procedure entry
 615
 616 fcoarray=
 617 Fortran RejectNegative JoinedOrMissing
 618 -fcoarray=[...] Specify which coarray parallelization should be used
 619
 620 fcheck=
 621 Fortran RejectNegative JoinedOrMissing
 622 -fcheck=[...]   Specify which runtime checks are to be performed
 623
 624 fsecond-underscore
 625 Fortran Var(flag_second_underscore) Init(-1)
 626 Append a second underscore if the name already contains an underscore
 627
 628 fshort-enums
 629 Fortran Var(flag_short_enums)
 630 ; Documented in C
 631
 632 fsign-zero
 633 Fortran
 634 Apply negative sign to zero values
 635
 636 funderscoring
 637 Fortran
 638 Append underscores to externally visible names
 639
 640 fwhole-file
 641 Fortran Ignore
 642 Does nothing.  Preserved for backward compatibility.
 643
 644 fworking-directory
 645 Fortran
 646 ; Documented in C
 647
 648 idirafter
 649 Fortran Joined Separate
 650 ; Documented in C
 651
 652 imultilib
 653 Fortran Joined Separate
 654 ; Documented in C
 655
 656 iprefix
 657 Fortran Joined Separate
 658 ; Documented in C
 659
 660 iquote
 661 Fortran Joined Separate
 662 ; Documented in C
 663
 664 isysroot
 665 Fortran Joined Separate
 666 ; Documented in C
 667
 668 isystem
 669 Fortran Joined Separate
 670 ; Documented in C
 671
 672 nostdinc
 673 Fortran
 674 ; Documented in C
 675
 676 o
 677 Fortran Joined Separate
 678 ; Documented in common.opt
 679
 680 static-libgfortran
 681 Fortran
 682 Statically link the GNU Fortran helper library (libgfortran)
 683
 684 std=f2003
 685 Fortran
 686 Conform to the ISO Fortran 2003 standard
 687
 688 std=f2008
 689 Fortran
 690 Conform to the ISO Fortran 2008 standard
 691
 692 std=f2008ts
 693 Fortran
 694 Conform to the ISO Fortran 2008 standard including TS 29113
 695
 696 std=f95
 697 Fortran
 698 Conform to the ISO Fortran 95 standard
 699
 700 std=gnu
 701 Fortran
 702 Conform to nothing in particular
 703
 704 std=legacy
 705 Fortran
 706 Accept extensions to support legacy code
 707
 708 undef
 709 Fortran
 710 ; Documented in C
 711
 712 v
 713 Fortran
 714 ; Documented in C
 715
 716 ; This comment is to ensure we retain the blank line above.