1 ; Options for the language- and target-independent parts of the compiler.
3 ; Copyright (C) 2003, 2004 Free Software Foundation, Inc.
5 ; This file is part of GCC.
7 ; GCC is free software; you can redistribute it and/or modify it under
8 ; the terms of the GNU General Public License as published by the Free
9 ; Software Foundation; either version 2, or (at your option) any later
12 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 ; You should have received a copy of the GNU General Public License
18 ; along with GCC; see the file COPYING. If not, write to the Free
19 ; Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 ; See c.opt for a description of this file's format.
24 ; Please try to keep this file in ASCII collating order.
28 Display this information
32 --param <param>=<value> Set paramter <param> to value. See below for a complete list of parameters
41 Common Joined Separate UInteger
42 -G<number> Put global and static data smaller than <number> bytes into a special section (on some targets)
45 Common JoinedOrMissing
46 -O<number> Set optimization level to <number>
50 Optimize for space rather than speed
54 This switch is deprecated; use -Wextra instead
57 Common Var(warn_aggregate_return)
58 Warn about returning structures, unions or arrays
61 Common Var(warn_cast_align)
62 Warn about pointer casts which increase alignment
64 Wdeprecated-declarations
65 Common Var(warn_deprecated_decl) Init(1)
66 Warn about uses of __attribute__((deprecated)) declarations
68 Wdisabled-optimization
69 Common Var(warn_disabled_optimization)
70 Warn when an optimization pass is disabled
73 Common Var(warnings_are_errors)
74 Treat all warnings as errors
78 Print extra (possibly unwanted) warnings
81 Common Var(flag_fatal_errors)
82 Exit on the first error occurred
85 Common Var(warn_inline)
86 Warn when an inlined function cannot be inlined
89 Common RejectNegative Joined UInteger
90 -Wlarger-than-<number> Warn if an object is larger than <number> bytes
93 Common Var(warn_missing_noreturn)
94 Warn about functions which might be candidates for __attribute__((noreturn))
97 Common Var(warn_packed)
98 Warn when the packed attribute has no effect on struct layout
101 Common Var(warn_padded)
102 Warn when padding is required to align structure members
105 Common Var(warn_shadow)
106 Warn when one local variable shadows another
110 Warn about code which might break strict aliasing rules
113 Common Joined UInteger
114 Warn about code which might break strict aliasing rules
117 Common Var(warn_switch)
118 Warn about enumerated switches, with no default, missing a case
121 Common Var(warn_switch_default)
122 Warn about enumerated switches missing a \"default:\" statement
125 Common Var(warn_switch_enum)
126 Warn about all enumerated switches missing a specific case
129 Common Var(warn_system_headers)
130 Do not suppress warnings from system headers
133 Common Var(warn_uninitialized)
134 Warn about uninitialized automatic variables
137 Common Var(warn_notreached)
138 Warn about code that will never be executed
142 Enable all -Wunused- warnings
145 Common Var(warn_unused_function)
146 Warn when a function is unused
149 Common Var(warn_unused_label)
150 Warn when a label is unused
153 Common Var(warn_unused_parameter)
154 Warn when a function parameter is unused
157 Common Var(warn_unused_value)
158 Warn when an expression value is unused
161 Common Var(warn_unused_variable)
162 Warn when a variable is unused
166 -aux-info <file> Emit declaration information into <file>
179 -d<letters> Enable dumps from specific passes of the compiler
183 -dumpbase <file> Set the file basename to be used for dumps
185 ; The version of the C++ ABI in use. The following values are allowed:
187 ; 0: The version of the ABI believed most conformant with the C++ ABI
188 ; specification. This ABI may change as bugs are discovered and fixed.
189 ; Therefore, 0 will not necessarily indicate the same ABI in different
192 ; 1: The version of the ABI first used in G++ 3.2.
194 ; Additional positive integers will be assigned as new versions of
195 ; the ABI become the default version of the ABI.
197 Common Joined UInteger Var(flag_abi_version) Init(2)
200 Common Report Var(align_functions,0)
201 Align the start of functions
204 Common RejectNegative Joined UInteger
207 Common Report Var(align_jumps,0)
208 Align labels which are only reached by jumping
211 Common RejectNegative Joined UInteger
214 Common Report Var(align_labels,0)
218 Common RejectNegative Joined UInteger
221 Common Report Var(align_loops)
222 Align the start of loops
225 Common RejectNegative Joined UInteger
227 ; This flag is only tested if alias checking is enabled.
228 ; 0 if pointer arguments may alias each other. True in C.
229 ; 1 if pointer arguments may not alias each other but may alias
231 ; 2 if pointer arguments may not alias each other and may not
232 ; alias global variables. True in Fortran.
233 ; The value is ignored if flag_alias_check is 0.
235 Common Report Var(flag_argument_noalias,0)
236 Specify that arguments may alias each other and globals
239 Common Report Var(flag_argument_noalias,1) VarExists
240 Assume arguments may alias globals but not each other
242 fargument-noalias-global
243 Common Report Var(flag_argument_noalias,2) VarExists
244 Assume arguments alias neither each other nor globals
246 fasynchronous-unwind-tables
247 Common Report Var(flag_asynchronous_unwind_tables)
248 Generate unwind tables that are exact at each instruction boundary
250 ; -fcheck-bounds causes gcc to generate array bounds checks.
251 ; For C, C++ and ObjC: defaults off.
252 ; For Java: defaults to on.
253 ; For Fortran: defaults to off.
255 Common Report Var(flag_bounds_check)
256 Generate code to check bounds before indexing arrays
259 Common Report Var(flag_branch_on_count_reg) Init(1)
260 Replace add, compare, branch with branch on count register
262 fbranch-probabilities
263 Common Report Var(flag_branch_probabilities)
264 Use profiling information for branch probabilities
266 fbranch-target-load-optimize
267 Common Report Var(flag_branch_target_load_optimize)
268 Perform branch target load optimization before prologue / epilogue threading
270 fbranch-target-load-optimize2
271 Common Report Var(flag_branch_target_load_optimize2)
272 Perform branch target load optimization after prologue / epilogue threading
275 Common Report Var(flag_btr_bb_exclusive)
276 Restrict target load migration not to re-use registers in any basic block
279 Common Joined RejectNegative
280 -fcall-saved-<register> Mark <register> as being preserved across functions
283 Common Joined RejectNegative
284 -fcall-used-<register> Mark <register> as being corrupted by function calls
286 ; Nonzero for -fcaller-saves: allocate values in regs that need to
287 ; be saved across function calls, if that produces overall better code.
288 ; Optional now, so people can test it.
290 Common Report Var(flag_caller_saves)
291 Save registers around function calls
294 Common Report Var(flag_no_common,0)
295 Do not put uninitialized globals in the common section
298 Common Report Var(flag_cprop_registers)
299 Perform a register copy-propagation optimization pass
302 Common Report Var(flag_crossjumping)
303 Perform cross-jumping optimization
306 Common Report Var(flag_cse_follow_jumps)
307 When running CSE, follow jumps to their targets
310 Common Report Var(flag_cse_skip_blocks)
311 When running CSE, follow conditional jumps
314 Common Report Var(flag_data_sections)
315 Place data items into their own section
317 ; Nonzero for -fdefer-pop: don't pop args after each function call
318 ; instead save them up to pop many calls' args with one insns.
320 Common Report Var(flag_defer_pop)
321 Defer popping functions args from stack until later
324 Common Report Var(flag_delayed_branch)
325 Attempt to fill delay slots of branch instructions
327 fdelete-null-pointer-checks
328 Common Report Var(flag_delete_null_pointer_checks)
329 Delete useless null pointer checks
331 fdiagnostics-show-location=
332 Common Joined RejectNegative
333 -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics
336 Common Joined RejectNegative
337 -fdump-<type> Dump various compiler internals to a file
340 Common Report Var(flag_dump_unnumbered) VarExists
341 Suppress output of instruction numbers and line number notes in debugging dumps
343 feliminate-dwarf2-dups
344 Common Report Var(flag_eliminate_dwarf2_dups)
345 Perform DWARF2 duplicate elimination
347 feliminate-unused-debug-symbols
348 Common Report Var(flag_debug_only_used_symbols)
349 Perform unused type elimination in debug info
351 feliminate-unused-debug-types
352 Common Report Var(flag_eliminate_unused_debug_types) Init(1)
353 Perform unused type elimination in debug info
356 Common Report Var(flag_exceptions)
357 Enable exception handling
359 fexpensive-optimizations
360 Common Report Var(flag_expensive_optimizations)
361 Perform a number of minor, expensive optimizations
367 Common Report Var(flag_finite_math_only)
368 Assume no NaNs or infinities are generated
371 Common Joined RejectNegative
372 -ffixed-<register> Mark <register> as being unavailable to the compiler
375 Common Report Var(flag_float_store)
376 Don't allocate floats and doubles in extended-precision registers
378 ; Nonzero for -fforce-addr: load memory address into a register before
379 ; reference to memory. This makes better cse but slower compilation.
381 Common Report Var(flag_force_addr)
382 Copy memory address constants into registers before use
384 ; Nonzero for -fforce-mem: load memory value into a register
385 ; before arithmetic on it. This makes better cse but slower compilation.
387 Common Report Var(flag_force_mem)
388 Copy memory operands into registers before use
390 ; Nonzero means don't put addresses of constant functions in registers.
391 ; Used for compiling the Unix kernel, where strange substitutions are
392 ; done on the assembly output.
394 Common Report Var(flag_no_function_cse,0)
395 Allow function addresses to be held in registers
398 Common Report Var(flag_function_sections)
399 Place each function into its own section
402 Common Report Var(flag_gcse)
403 Perform global common subexpression elimination
406 Common Report Var(flag_gcse_lm) Init(1)
407 Perform enhanced load motion during global common subexpression elimination
410 Common Report Var(flag_gcse_sm) Init(0)
411 Perform store motion after global common subexpression elimination
414 Common Report Var(flag_gcse_las) Init(0)
415 Perform redundant load after store elimination in global common subexpression
419 Common Report Var(flag_gcse_after_reload)
420 Perform global common subexpression elimination after register allocation
423 fguess-branch-probability
424 Common Report Var(flag_guess_branch_prob)
425 Enable guessing of branch probabilities
427 ; Nonzero means ignore `#ident' directives. 0 means handle them.
428 ; Generate position-independent code for executables if possible
429 ; On SVR4 targets, it also controls whether or not to emit a
430 ; string identifying the compiler.
432 Common Report Var(flag_no_ident,0)
433 Process #ident directives
436 Common Report Var(flag_if_conversion)
437 Perform conversion of conditional jumps to branchless equivalents
440 Common Report Var(flag_if_conversion2)
441 Perform conversion of conditional jumps to conditional execution
443 ; -finhibit-size-directive inhibits output of .size for ELF.
444 ; This is used only for compiling crtstuff.c,
445 ; and it may be extended to other effects
446 ; needed for crtstuff.c on other systems.
447 finhibit-size-directive
448 Common Report Var(flag_inhibit_size_directive)
449 Do not generate .size directives
451 ; Nonzero means that functions declared `inline' will be treated
452 ; as `static'. Prevents generation of zillions of copies of unused
453 ; static inline functions; instead, `inlines' are written out
454 ; only when actually used. Used in conjunction with -g. Also
455 ; does the right thing with #pragma interface.
457 Common Report Var(flag_no_inline,0) Init(2)
458 Pay attention to the \"inline\" keyword
461 Common Report Var(flag_inline_functions)
462 Integrate simple functions into their callers
465 Common RejectNegative Joined UInteger
468 Common RejectNegative Joined UInteger
469 -finline-limit=<number> Limit the size of inlined functions to <number>
471 finstrument-functions
472 Common Report Var(flag_instrument_function_entry_exit)
473 Instrument function entry and exit with profiling calls
476 Common Report Var(flag_ivopts) Init(1)
477 Optimize induction variables on trees
479 fkeep-inline-functions
480 Common Report Var(flag_keep_inline_functions)
481 Generate code for functions even if they are fully inlined
484 Common Report Var(flag_keep_static_consts) Init(1)
485 Emit static const variables even if they are not used
488 Common Report Var(flag_leading_underscore) Init(-1)
489 Give external symbols a leading underscore
492 Common Report Var(flag_loop_optimize)
493 Perform loop optimizations
496 Common Report Var(flag_loop_optimize2)
497 Perform loop optimizations using the new loop optimizer
500 Common Report Var(flag_errno_math) Init(1)
501 Set errno after built-in math functions
504 Common Report Var(mem_report)
505 Report on permanent memory allocation
507 ; This will attempt to merge constant section constants, if 1 only
508 ; string constants and constants from constant pool, if 2 also constant
511 Common Report Var(flag_merge_constants,2) Init(1)
512 Attempt to merge identical constants and constant variables
515 Common Report Var(flag_merge_constants,1) VarExists
516 Attempt to merge identical constants across compilation units
519 Common RejectNegative Joined UInteger
520 -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping
523 Common Report Var(flag_modulo_sched)
524 Perform SMS based modulo scheduling before the first scheduling pass
526 fmove-loop-invariants
527 Common Report Var(flag_move_loop_invariants)
528 Move loop invariant computations out of loops
531 Common RejectNegative Report Var(flag_mudflap)
532 Add mudflap bounds-checking instrumentation for single-threaded program.
535 Common RejectNegative Report Var(flag_mudflap_threads)
536 Add mudflap bounds-checking instrumentation for multi-threaded program.
539 Common RejectNegative Report Var(flag_mudflap_ignore_reads)
540 Ignore read operations when inserting mudflap instrumentation.
543 Common Report Var(flag_new_regalloc)
544 Use graph-coloring register allocation
546 freschedule-modulo-scheduled-loops
547 Common Report Var(flag_resched_modulo_sched)
548 Enable/Disable the traditional scheduling in loops that already passed modulo scheduling
551 Common Report Var(flag_non_call_exceptions)
552 Support synchronous non-call exceptions
555 Common Report Var(flag_omit_frame_pointer)
556 When possible do not generate stack frames
558 foptimize-register-move
559 Common Report Var(flag_regmove)
560 Do the full register move optimization pass
562 foptimize-sibling-calls
563 Common Report Var(flag_optimize_sibling_calls)
564 Optimize sibling and tail recursive calls
567 Common Report Var(flag_pack_struct)
568 Pack structure members together without holes
571 Common RejectNegative Joined UInteger
572 -fpack-struct=<number> Set initial maximum structure member alignment
575 Common Report Var(flag_pcc_struct_return,1) VarExists
576 Return small aggregates in memory, not registers
579 Common Report Var(flag_peel_loops)
583 Common Report Var(flag_no_peephole,0)
584 Enable machine specific peephole optimizations
587 Common Report Var(flag_peephole2)
588 Enable an RTL peephole pass before sched2
591 Common Report Var(flag_pic,2)
592 Generate position-independent code if possible (large mode)
595 Common Report Var(flag_pie,2)
596 Generate position-independent code for executables if possible (large mode)
599 Common Report Var(flag_pic,1) VarExists
600 Generate position-independent code if possible (small mode)
603 Common Report Var(flag_pie,1) VarExists
604 Generate position-independent code for executables if possible (small mode)
606 fprefetch-loop-arrays
607 Common Report Var(flag_prefetch_loop_arrays)
608 Generate prefetch instructions, if available, for arrays in loops
611 Common Report Var(profile_flag)
612 Enable basic program profiling code
615 Common Report Var(profile_arc_flag)
616 Insert arc-based program profiling code
620 Enable common options for generating profile info for profile feedback directed optimizations
624 Enable common options for performing profile feedback directed optimizations
627 Common Report Var(flag_profile_values)
628 Insert code to profile values of expressions
634 Common Joined RejectNegative
635 -frandom-seed=<string> Make compile reproducible using <string>
638 Common Report Var(flag_pcc_struct_return,0) VarExists
639 Return small aggregates in registers
642 Common Report Var(flag_regmove)
643 Enables a register move optimization
646 Common Report Var(flag_rename_registers)
647 Perform a register renaming optimization pass
650 Common Report Var(flag_reorder_blocks)
651 Reorder basic blocks to improve code placement
653 freorder-blocks-and-partition
654 Common Report Var(flag_reorder_blocks_and_partition)
655 Reorder basic blocks and partition into hot and cold sections
658 Common Report Var(flag_reorder_functions)
659 Reorder functions to improve code placement
661 frerun-cse-after-loop
662 Common Report Var(flag_rerun_cse_after_loop)
663 Add a common subexpression elimination pass after loop optimizations
666 Common Report Var(flag_rerun_loop_opt)
667 Run the loop optimizer twice
670 Common Report Var(flag_rounding_math)
671 Disable optimizations that assume default FP rounding behavior
674 Common Report Var(flag_schedule_interblock) Init(1)
675 Enable scheduling across basic blocks
678 Common Report Var(flag_schedule_speculative) Init(1)
679 Allow speculative motion of non-loads
682 Common Report Var(flag_schedule_speculative_load)
683 Allow speculative motion of some loads
685 fsched-spec-load-dangerous
686 Common Report Var(flag_schedule_speculative_load_dangerous)
687 Allow speculative motion of more loads
690 Common RejectNegative Joined
691 -fsched-verbose=<number> Set the verbosity level of the scheduler
693 fsched2-use-superblocks
694 Common Report Var(flag_sched2_use_superblocks)
695 If scheduling post reload, do superblock scheduling
698 Common Report Var(flag_sched2_use_traces)
699 If scheduling post reload, do trace scheduling
702 Common Report Var(flag_schedule_insns)
703 Reschedule instructions before register allocation
706 Common Report Var(flag_schedule_insns_after_reload)
707 Reschedule instructions after register allocation
709 ; sched_stalled_insns means that insns can be moved prematurely from the queue
710 ; of stalled insns into the ready list.
712 Common Report Var(flag_sched_stalled_insns)
713 Allow premature scheduling of queued insns
715 fsched-stalled-insns=
716 Common RejectNegative Joined UInteger
717 -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled
719 ; sched_stalled_insns_dep controls how many recently scheduled cycles will
720 ; be examined for a dependency on a stalled insn that is candidate for
721 ; premature removal from the queue of stalled insns into the ready list (has
722 ; an effect only if the flag 'sched_stalled_insns' is set).
723 fsched-stalled-insns-dep
724 Common Report Var(flag_sched_stalled_insns_dep,1) Init(1)
725 Set dependence distance checking in premature scheduling of queued insns
727 fsched-stalled-insns-dep=
728 Common RejectNegative Joined UInteger
729 -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns
732 Common Report Var(flag_shared_data)
733 Mark data as shared rather than private
736 Common Report Var(flag_signaling_nans)
737 Disable optimizations observable by IEEE signaling NaNs
739 fsingle-precision-constant
740 Common Report Var(flag_single_precision_constant)
741 Convert floating point constants to single precision constants
743 fspeculative-prefetching
744 Common Report Var(flag_speculative_prefetching)
745 Use value profiling for speculative prefetching
747 fsplit-ivs-in-unroller
748 Common Report Var(flag_split_ivs_in_unroller) Init(1)
749 Split lifetimes of induction variables when loops are unrolled.
751 ; Emit code to probe the stack, to help detect stack overflow; also
752 ; may cause large objects to be allocated dynamically.
754 Common Report Var(flag_stack_check)
755 Insert stack checking code into the program
760 fstack-limit-register=
761 Common RejectNegative Joined
762 -fstack-limit-register=<register> Trap if the stack goes past <register>
765 Common RejectNegative Joined
766 -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name>
769 Common Report Var(flag_strength_reduce)
770 Perform strength reduction optimizations
772 ; Nonzero if we should do (language-dependent) alias analysis.
773 ; Typically, this analysis will assume that expressions of certain
774 ; types do not alias expressions of certain other types. Only used
775 ; if alias analysis (in general) is enabled.
777 Common Report Var(flag_strict_aliasing)
778 Assume strict aliasing rules apply
781 Common Report Var(flag_syntax_only)
782 Check for syntax errors, then stop
785 Common Report Var(flag_test_coverage)
786 Create data files needed by \"gcov\"
789 Common Report Var(flag_thread_jumps)
790 Perform jump threading optimizations
793 Common Report Var(time_report)
794 Report the time taken by each compiler pass
797 Common Joined RejectNegative
798 -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model
801 Common Report Var(flag_tracer)
802 Perform superblock formation via tail duplication
804 ; Zero means that floating-point math operations cannot generate a
805 ; (user-visible) trap. This is the case, for example, in nonstop
806 ; IEEE 754 arithmetic.
808 Common Report Var(flag_trapping_math) Init(1)
809 Assume floating-point operations can trap
812 Common Report Var(flag_trapv)
813 Trap for signed overflow in addition, subtraction and multiplication
815 ftree-based-profiling
816 Common Report Var(flag_tree_based_profiling)
817 Use tree-ssa based implementation of profiling
820 Common Report Var(flag_tree_ccp)
821 Enable SSA-CCP optimization on trees
824 Common Report Var(flag_tree_ch)
825 Enable loop header copying on trees
828 Common Report Var(flag_tree_combine_temps)
829 Coalesce memory temporaries in the SSA->normal pass
832 Common Report Var(flag_tree_copyrename)
833 Replace SSA temporaries with better names in copies.
836 Common Report Var(flag_tree_dce)
837 Enable SSA dead code elimination optimization on trees
840 Common Report Var(flag_tree_dom)
841 Enable dominator optimizations
844 Common Report Var(flag_tree_dse)
845 Enable dead store elimination
848 Common Report Var(flag_tree_fre)
849 Enable Full Redundancy Elimination (FRE) on trees
852 Common Report Var(flag_tree_loop_im) Init(1)
853 Enable loop invariant motion on trees
856 Common Report Var(flag_tree_loop_linear)
857 Enable linear loop transforms on trees
860 Common Report Var(flag_tree_loop_ivcanon) Init(1)
861 Create canonical induction variables in loops
864 Common Report Var(flag_tree_loop_optimize) Init(1)
865 Enable loop optimizations on tree level
868 Common Report Var(flag_tree_pre)
869 Enable SSA-PRE optimization on trees
872 Common Report Var(flag_tree_sra)
873 Perform scalar replacement of aggregates
876 Common Report Var(flag_tree_ter)
877 Replace temporary expressions in the SSA->normal pass
880 Common Report Var(flag_tree_live_range_split)
881 Perform live range splitting during the SSA->normal pass.
884 Common Report Var(flag_unit_at_a_time)
885 Compile whole compilation unit at a time
888 Common Report Var(flag_unroll_loops)
889 Perform loop unrolling when iteration count is known
892 Common Report Var(flag_unroll_all_loops)
893 Perform loop unrolling for all loops
895 ; Nonzero means that unsafe floating-point math optimizations are allowed
896 ; for the sake of speed. IEEE compliance is not guaranteed, and operations
897 ; are allowed to assume that their arguments and results are "normal"
898 ; (e.g., nonnegative for SQRT).
899 funsafe-math-optimizations
900 Common Report Var(flag_unsafe_math_optimizations)
901 Allow math optimizations that may violate IEEE or ISO standards
904 Common Report Var(flag_unswitch_loops)
905 Perform loop unswitching
908 Common Report Var(flag_unwind_tables)
909 Just generate unwind tables for exception handling
912 Common Report Var(flag_var_tracking) VarExists
913 Perform variable tracking
916 Common Report Var(flag_tree_vectorize)
917 Enable loop vectorization on trees
919 ; -fverbose-asm causes extra commentary information to be produced in
920 ; the generated assembly code (to make it more readable). This option
921 ; is generally only of use to those who actually need to read the
922 ; generated assembly code (perhaps while debugging the compiler itself).
923 ; -fno-verbose-asm, the default, causes the extra information
924 ; to not be added and is useful when comparing two assembler files.
926 Common Report Var(flag_verbose_asm)
927 Add extra commentary to assembler output
930 Common Joined RejectNegative
931 -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility
935 Common Report Var(flag_value_profile_transformations)
936 Use expression value profiles in optimizations
939 Common Report Var(flag_web) Init(0)
940 Construct webs and split unrelated uses of single variable
943 Common Report Var(flag_wrapv)
944 Assume signed arithmetic overflow wraps around
946 fzero-initialized-in-bss
947 Common Report Var(flag_zero_initialized_in_bss) Init(1)
948 Put zero initialized data in the bss section
951 Common JoinedOrMissing
952 Generate debug information in default format
955 Common JoinedOrMissing
956 Generate debug information in COFF format
959 Common JoinedOrMissing
960 Generate debug information in DWARF v2 format
963 Common JoinedOrMissing
964 Generate debug information in default extended format
967 Common JoinedOrMissing
968 Generate debug information in STABS format
971 Common JoinedOrMissing
972 Generate debug information in extended STABS format
975 Common JoinedOrMissing
976 Generate debug information in VMS format
979 Common JoinedOrMissing
980 Generate debug information in XCOFF format
983 Common JoinedOrMissing
984 Generate debug information in extended XCOFF format
990 Common Joined Separate
991 -o <file> Place output into <file>
994 Common Var(profile_flag)
995 Enable function profiling
999 Issue warnings needed for strict compliance to the standard
1003 Like -pedantic but issue them as errors
1006 Common Var(quiet_flag)
1007 Do not display functions compiled or elapsed time
1010 Common Var(version_flag)
1011 Display the compiler's version
1014 Common Var(inhibit_warnings)
1017 ; This comment is to ensure we retain the blank line above.