; Options for the language- and target-independent parts of the compiler.
-; Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+
+; Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
;
; You should have received a copy of the GNU General Public License
; along with GCC; see the file COPYING. If not, write to the Free
-; Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-; 02111-1307, USA.
+; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+; 02110-1301, USA.
-; See c.opt for a description of this file's format.
+; See the GCC internals manual for a description of this file's format.
; Please try to keep this file in ASCII collating order.
-param
Common Separate
---param <param>=<value> Set paramter <param> to value. See below for a complete list of parameters
+--param <param>=<value> Set param
eter <param> to value. See below for a complete list of parameters
-target-help
Common
This switch is deprecated; use -Wextra instead
Waggregate-return
-Common
+Common Var(warn_aggregate_return)
Warn about returning structures, unions or arrays
+Walways-true
+Common Var(warn_always_true)
+Warn about comparisons that always evaluate to true
+
+Wattributes
+Common Var(warn_attributes) Init(1)
+Warn about inappropriate attribute usage
+
Wcast-align
-Common
+Common Var(warn_cast_align)
Warn about pointer casts which increase alignment
Wdeprecated-declarations
-Common
+Common Var(warn_deprecated_decl) Init(1)
Warn about uses of __attribute__((deprecated)) declarations
Wdisabled-optimization
-Common
+Common Var(warn_disabled_optimization)
Warn when an optimization pass is disabled
Werror
-Common
+Common Var(warnings_are_errors)
Treat all warnings as errors
+Werror=
+Common Joined
+Treat specified warning as error
+
Wextra
Common
Print extra (possibly unwanted) warnings
+Wfatal-errors
+Common Var(flag_fatal_errors)
+Exit on the first error occurred
+
Winline
-Common
+Common Var(warn_inline)
Warn when an inlined function cannot be inlined
Wlarger-than-
Common RejectNegative Joined UInteger
-Wlarger-than-<number> Warn if an object is larger than <number> bytes
+Wunsafe-loop-optimizations
+Common Var(warn_unsafe_loop_optimizations)
+Warn if the loop cannot be optimized due to nontrivial assumptions.
+
Wmissing-noreturn
-Common
+Common Var(warn_missing_noreturn)
Warn about functions which might be candidates for __attribute__((noreturn))
Wpacked
-Common
+Common Var(warn_packed)
Warn when the packed attribute has no effect on struct layout
Wpadded
-Common
+Common Var(warn_padded)
Warn when padding is required to align structure members
Wshadow
-Common
+Common Var(warn_shadow)
Warn when one local variable shadows another
+Wstack-protector
+Common Var(warn_stack_protect)
+Warn when not issuing stack smashing protection for some reason
+
Wstrict-aliasing
Common
Warn about code which might break strict aliasing rules
+Wstrict-aliasing=
+Common Joined UInteger
+Warn about code which might break strict aliasing rules
+
+Wstring-literal-comparison
+Common Var(warn_string_literal_comparison)
+Warn about comparisons to constant string literals
+
Wswitch
-Common
+Common Var(warn_switch)
Warn about enumerated switches, with no default, missing a case
Wswitch-default
-Common
+Common Var(warn_switch_default)
Warn about enumerated switches missing a \"default:\" statement
Wswitch-enum
-Common
+Common Var(warn_switch_enum)
Warn about all enumerated switches missing a specific case
Wsystem-headers
-Common
+Common Var(warn_system_headers)
Do not suppress warnings from system headers
Wuninitialized
-Common
+Common Var(warn_uninitialized)
Warn about uninitialized automatic variables
Wunreachable-code
-Common
+Common Var(warn_notreached)
Warn about code that will never be executed
Wunused
Enable all -Wunused- warnings
Wunused-function
-Common
+Common Var(warn_unused_function)
Warn when a function is unused
Wunused-label
-Common
+Common Var(warn_unused_label)
Warn when a label is unused
Wunused-parameter
-Common
+Common Var(warn_unused_parameter)
Warn when a function parameter is unused
Wunused-value
-Common
+Common Var(warn_unused_value)
Warn when an expression value is unused
Wunused-variable
-Common
+Common Var(warn_unused_variable)
Warn when a variable is unused
+Wvolatile-register-var
+Common Var(warn_register_var)
+Warn when a register variable is declared volatile
+
aux-info
Common Separate
-aux-info <file> Emit declaration information into <file>
Common Separate
-dumpbase <file> Set the file basename to be used for dumps
-fPIC
-Common
-
-fPIE
-Common
+; The version of the C++ ABI in use. The following values are allowed:
+;
+; 0: The version of the ABI believed most conformant with the C++ ABI
+; specification. This ABI may change as bugs are discovered and fixed.
+; Therefore, 0 will not necessarily indicate the same ABI in different
+; versions of G++.
+;
+; 1: The version of the ABI first used in G++ 3.2.
+;
+; Additional positive integers will be assigned as new versions of
+; the ABI become the default version of the ABI.
+fabi-version=
+Common Joined UInteger Var(flag_abi_version) Init(2)
falign-functions
-Common
+Common Report Var(align_functions,0)
Align the start of functions
falign-functions=
Common RejectNegative Joined UInteger
falign-jumps
-Common
+Common Report Var(align_jumps,0)
Align labels which are only reached by jumping
falign-jumps=
Common RejectNegative Joined UInteger
falign-labels
-Common
+Common Report Var(align_labels,0)
Align all labels
falign-labels=
Common RejectNegative Joined UInteger
falign-loops
-Common
+Common Report Var(align_loops)
Align the start of loops
falign-loops=
Common RejectNegative Joined UInteger
+; This flag is only tested if alias checking is enabled.
+; 0 if pointer arguments may alias each other. True in C.
+; 1 if pointer arguments may not alias each other but may alias
+; global variables.
+; 2 if pointer arguments may not alias each other and may not
+; alias global variables.
+; 3 if pointer arguments may not alias anything. True in Fortran.
+; Set by the front end.
fargument-alias
-Common
+Common Report Var(flag_argument_noalias,0)
Specify that arguments may alias each other and globals
fargument-noalias
-Common
+Common Report Var(flag_argument_noalias,1) VarExists
Assume arguments may alias globals but not each other
fargument-noalias-global
-Common
+Common Report Var(flag_argument_noalias,2) VarExists
Assume arguments alias neither each other nor globals
+fargument-noalias-anything
+Common Report Var(flag_argument_noalias,3) VarExists
+Assume arguments alias no other storage
+
fasynchronous-unwind-tables
-Common
+Common Report Var(flag_asynchronous_unwind_tables)
Generate unwind tables that are exact at each instruction boundary
+; -fcheck-bounds causes gcc to generate array bounds checks.
+; For C, C++ and ObjC: defaults off.
+; For Java: defaults to on.
+; For Fortran: defaults to off.
fbounds-check
-Common
+Common Report Var(flag_bounds_check)
Generate code to check bounds before indexing arrays
fbranch-count-reg
-Common
+Common Report Var(flag_branch_on_count_reg) Init(1)
Replace add, compare, branch with branch on count register
fbranch-probabilities
-Common
+Common Report Var(flag_branch_probabilities)
Use profiling information for branch probabilities
fbranch-target-load-optimize
-Common
+Common Report Var(flag_branch_target_load_optimize)
Perform branch target load optimization before prologue / epilogue threading
fbranch-target-load-optimize2
-Common
+Common Report Var(flag_branch_target_load_optimize2)
Perform branch target load optimization after prologue / epilogue threading
fbtr-bb-exclusive
-Common
+Common Report Var(flag_btr_bb_exclusive)
Restrict target load migration not to re-use registers in any basic block
fcall-saved-
Common Joined RejectNegative
-fcall-used-<register> Mark <register> as being corrupted by function calls
+; Nonzero for -fcaller-saves: allocate values in regs that need to
+; be saved across function calls, if that produces overall better code.
+; Optional now, so people can test it.
fcaller-saves
-Common
+Common Report Var(flag_caller_saves)
Save registers around function calls
fcommon
-Common
+Common Report Var(flag_no_common,0)
Do not put uninitialized globals in the common section
fcprop-registers
-Common
+Common Report Var(flag_cprop_registers)
Perform a register copy-propagation optimization pass
fcrossjumping
-Common
+Common Report Var(flag_crossjumping)
Perform cross-jumping optimization
fcse-follow-jumps
-Common
+Common Report Var(flag_cse_follow_jumps)
When running CSE, follow jumps to their targets
fcse-skip-blocks
-Common
+Common Report Var(flag_cse_skip_blocks)
When running CSE, follow conditional jumps
+fcx-limited-range
+Common Report Var(flag_cx_limited_range)
+Omit range reduction step when performing complex division
+
fdata-sections
-Common
+Common Report Var(flag_data_sections)
Place data items into their own section
+; Nonzero for -fdefer-pop: don't pop args after each function call
+; instead save them up to pop many calls' args with one insns.
fdefer-pop
-Common
+Common Report Var(flag_defer_pop)
Defer popping functions args from stack until later
fdelayed-branch
-Common
+Common Report Var(flag_delayed_branch)
Attempt to fill delay slots of branch instructions
fdelete-null-pointer-checks
-Common
+Common Report Var(flag_delete_null_pointer_checks)
Delete useless null pointer checks
fdiagnostics-show-location=
Common Joined RejectNegative
-fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics
-fdump-unnumbered
+fdiagnostics-show-option
Common
+Amend appropriate diagnostic messages with the command line option that controls them
+
+fdump-
+Common Joined RejectNegative
+-fdump-<type> Dump various compiler internals to a file
+
+fdump-unnumbered
+Common Report Var(flag_dump_unnumbered) VarExists
Suppress output of instruction numbers and line number notes in debugging dumps
+fearly-inlining
+Common Report Var(flag_early_inlining) Init(1)
+Perform early inlining
+
feliminate-dwarf2-dups
-Common
+Common Report Var(flag_eliminate_dwarf2_dups)
Perform DWARF2 duplicate elimination
feliminate-unused-debug-symbols
-Common
+Common Report Var(flag_debug_only_used_symbols)
Perform unused type elimination in debug info
feliminate-unused-debug-types
-Common
+Common Report Var(flag_eliminate_unused_debug_types) Init(1)
Perform unused type elimination in debug info
+femit-class-debug-always
+Common Report Var(flag_emit_class_debug_always) Init(1)
+Do not suppress C++ class debug information.
+
fexceptions
-Common
+Common Report Var(flag_exceptions)
Enable exception handling
fexpensive-optimizations
-Common
+Common Report Var(flag_expensive_optimizations)
Perform a number of minor, expensive optimizations
ffast-math
Common
ffinite-math-only
-Common
+Common Report Var(flag_finite_math_only)
Assume no NaNs or infinities are generated
ffixed-
-ffixed-<register> Mark <register> as being unavailable to the compiler
ffloat-store
-Common
-Do not store floats in registers
+Common Report Var(flag_float_store)
+Don't allocate floats and doubles in extended-precision registers
+; Nonzero for -fforce-addr: load memory address into a register before
+; reference to memory. This makes better cse but slower compilation.
fforce-addr
-Common
+Common Report Var(flag_force_addr)
Copy memory address constants into registers before use
+; Nonzero for -fforce-mem: load memory value into a register
+; before arithmetic on it. This makes better cse but slower compilation.
fforce-mem
-Common
+Common Report Var(flag_force_mem)
Copy memory operands into registers before use
+; Nonzero means don't put addresses of constant functions in registers.
+; Used for compiling the Unix kernel, where strange substitutions are
+; done on the assembly output.
ffunction-cse
-Common
+Common Report Var(flag_no_function_cse,0)
Allow function addresses to be held in registers
ffunction-sections
-Common
+Common Report Var(flag_function_sections)
Place each function into its own section
fgcse
-Common
+Common Report Var(flag_gcse)
Perform global common subexpression elimination
fgcse-lm
-Common
+Common Report Var(flag_gcse_lm) Init(1)
Perform enhanced load motion during global common subexpression elimination
fgcse-sm
-Common
+Common Report Var(flag_gcse_sm) Init(0)
Perform store motion after global common subexpression elimination
fgcse-las
-Common
-Perform redundant load after store elimination in global common subexpression elimination
+Common Report Var(flag_gcse_las) Init(0)
+Perform redundant load after store elimination in global common subexpression
+elimination
+
+fgcse-after-reload
+Common Report Var(flag_gcse_after_reload)
+Perform global common subexpression elimination after register allocation
+has finished
fguess-branch-probability
-Common
+Common Report Var(flag_guess_branch_prob)
Enable guessing of branch probabilities
+; Nonzero means ignore `#ident' directives. 0 means handle them.
+; Generate position-independent code for executables if possible
+; On SVR4 targets, it also controls whether or not to emit a
+; string identifying the compiler.
fident
-Common
+Common Report Var(flag_no_ident,0)
Process #ident directives
fif-conversion
-Common
+Common Report Var(flag_if_conversion)
Perform conversion of conditional jumps to branchless equivalents
fif-conversion2
-Common
+Common Report Var(flag_if_conversion2)
Perform conversion of conditional jumps to conditional execution
+; -finhibit-size-directive inhibits output of .size for ELF.
+; This is used only for compiling crtstuff.c,
+; and it may be extended to other effects
+; needed for crtstuff.c on other systems.
finhibit-size-directive
-Common
+Common Report Var(flag_inhibit_size_directive)
Do not generate .size directives
+; Nonzero means that functions declared `inline' will be treated
+; as `static'. Prevents generation of zillions of copies of unused
+; static inline functions; instead, `inlines' are written out
+; only when actually used. Used in conjunction with -g. Also
+; does the right thing with #pragma interface.
finline
-Common
+Common Report Var(flag_no_inline,0) Init(2)
Pay attention to the \"inline\" keyword
finline-functions
-Common
+Common Report Var(flag_inline_functions)
Integrate simple functions into their callers
+finline-functions-called-once
+Common Report Var(flag_inline_functions_called_once) Init(1)
+Integrate functions called once into their callers
+
finline-limit-
Common RejectNegative Joined UInteger
-finline-limit=<number> Limit the size of inlined functions to <number>
finstrument-functions
-Common
+Common Report Var(flag_instrument_function_entry_exit)
Instrument function entry and exit with profiling calls
+fipa-cp
+Common Report Var(flag_ipa_cp)
+Perform Interprocedural constant propagation
+
+fipa-pure-const
+Common Report Var(flag_ipa_pure_const) Init(0)
+Discover pure and const functions
+
+fipa-pta
+Common Report Var(flag_ipa_pta) Init(0)
+Perform interprocedural points-to analysis
+
+fipa-reference
+Common Report Var(flag_ipa_reference) Init(0)
+Discover readonly and non addressable static variables
+
+fipa-type-escape
+Common Report Var(flag_ipa_type_escape) Init(0)
+Type based escape and alias analysis
+
+fivopts
+Common Report Var(flag_ivopts) Init(1)
+Optimize induction variables on trees
+
+fjump-tables
+Common Var(flag_jump_tables) Init(1)
+Use jump tables for sufficiently large switch statements
+
fkeep-inline-functions
-Common
+Common Report Var(flag_keep_inline_functions)
Generate code for functions even if they are fully inlined
fkeep-static-consts
-Common
+Common Report Var(flag_keep_static_consts) Init(1)
Emit static const variables even if they are not used
fleading-underscore
-Common
+Common Report Var(flag_leading_underscore) Init(-1)
Give external symbols a leading underscore
floop-optimize
Common
-Perform loop optimizations
+Does nothing. Preserved for backward compatibility.
fmath-errno
-Common
+Common Report Var(flag_errno_math) Init(1)
Set errno after built-in math functions
fmem-report
-Common
+Common Report Var(mem_report)
Report on permanent memory allocation
+; This will attempt to merge constant section constants, if 1 only
+; string constants and constants from constant pool, if 2 also constant
+; variables.
fmerge-all-constants
-Common
+Common Report Var(flag_merge_constants,2) Init(1)
Attempt to merge identical constants and constant variables
fmerge-constants
-Common
+Common Report Var(flag_merge_constants,1) VarExists
Attempt to merge identical constants across compilation units
fmessage-length=
Common RejectNegative Joined UInteger
-fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping
-fmove-all-movables
-Common
-Force all loop invariant computations out of loops
+fmodulo-sched
+Common Report Var(flag_modulo_sched)
+Perform SMS based modulo scheduling before the first scheduling pass
-fnew-ra
-Common
-Use graph-coloring register allocation
+fmove-loop-invariants
+Common Report Var(flag_move_loop_invariants) Init(1)
+Move loop invariant computations out of loops
-fnon-call-exceptions
-Common
-Support synchronous non-call exceptions
+fmudflap
+Common RejectNegative Report Var(flag_mudflap)
+Add mudflap bounds-checking instrumentation for single-threaded program
-fold-unroll-loops
-Common
-Perform loop unrolling when iteration count is known
+fmudflapth
+Common RejectNegative Report VarExists Var(flag_mudflap,2)
+Add mudflap bounds-checking instrumentation for multi-threaded program
-fold-unroll-all-loops
-Common
-Perform loop unrolling for all loops
+fmudflapir
+Common RejectNegative Report Var(flag_mudflap_ignore_reads)
+Ignore read operations when inserting mudflap instrumentation
+
+freschedule-modulo-scheduled-loops
+Common Report Var(flag_resched_modulo_sched)
+Enable/Disable the traditional scheduling in loops that already passed modulo scheduling
+
+fnon-call-exceptions
+Common Report Var(flag_non_call_exceptions)
+Support synchronous non-call exceptions
fomit-frame-pointer
-Common
+Common Report Var(flag_omit_frame_pointer)
When possible do not generate stack frames
foptimize-register-move
-Common
+Common Report Var(flag_regmove)
Do the full register move optimization pass
foptimize-sibling-calls
-Common
+Common Report Var(flag_optimize_sibling_calls)
Optimize sibling and tail recursive calls
fpack-struct
-Common
+Common Report Var(flag_pack_struct)
Pack structure members together without holes
+fpack-struct=
+Common RejectNegative Joined UInteger
+-fpack-struct=<number> Set initial maximum structure member alignment
+
fpcc-struct-return
-Common
+Common Report Var(flag_pcc_struct_return,1) VarExists
Return small aggregates in memory, not registers
fpeel-loops
-Common
+Common Report Var(flag_peel_loops)
Perform loop peeling
fpeephole
-Common
+Common Report Var(flag_no_peephole,0)
Enable machine specific peephole optimizations
fpeephole2
-Common
+Common Report Var(flag_peephole2)
Enable an RTL peephole pass before sched2
+fPIC
+Common Report Var(flag_pic,2)
+Generate position-independent code if possible (large mode)
+
+fPIE
+Common Report Var(flag_pie,2)
+Generate position-independent code for executables if possible (large mode)
+
fpic
-Common
-Generate position-independent code if possible
+Common Report Var(flag_pic,1) VarExists
+Generate position-independent code if possible (small mode)
fpie
-Common
-Generate position-independent code for executables if possible
+Common Report Var(flag_pie,1) VarExists
+Generate position-independent code for executables if possible (small mode)
fprefetch-loop-arrays
-Common
+Common Report Var(flag_prefetch_loop_arrays)
Generate prefetch instructions, if available, for arrays in loops
fprofile
-Common
+Common Report Var(profile_flag)
Enable basic program profiling code
fprofile-arcs
-Common
+Common Report Var(profile_arc_flag)
Insert arc-based program profiling code
fprofile-generate
Enable common options for performing profile feedback directed optimizations
fprofile-values
-Common
+Common Report Var(flag_profile_values)
Insert code to profile values of expressions
frandom-seed
Common Joined RejectNegative
-frandom-seed=<string> Make compile reproducible using <string>
-freduce-all-givs
-Common
-Strength reduce all loop general induction variables
-
freg-struct-return
-Common
+Common Report Var(flag_pcc_struct_return,0) VarExists
Return small aggregates in registers
fregmove
-Common
+Common Report Var(flag_regmove)
Enables a register move optimization
frename-registers
-Common
+Common Report Var(flag_rename_registers) Init(2)
Perform a register renaming optimization pass
freorder-blocks
-Common
+Common Report Var(flag_reorder_blocks)
Reorder basic blocks to improve code placement
+freorder-blocks-and-partition
+Common Report Var(flag_reorder_blocks_and_partition)
+Reorder basic blocks and partition into hot and cold sections
+
freorder-functions
-Common
+Common Report Var(flag_reorder_functions)
Reorder functions to improve code placement
frerun-cse-after-loop
-Common
+Common Report Var(flag_rerun_cse_after_loop) Init(2)
Add a common subexpression elimination pass after loop optimizations
frerun-loop-opt
Common
-Run the loop optimizer twice
+Does nothing. Preserved for backward compatibility.
frounding-math
-Common
+Common Report Var(flag_rounding_math)
Disable optimizations that assume default FP rounding behavior
fsched-interblock
-Common
+Common Report Var(flag_schedule_interblock) Init(1)
Enable scheduling across basic blocks
fsched-spec
-Common
+Common Report Var(flag_schedule_speculative) Init(1)
Allow speculative motion of non-loads
fsched-spec-load
-Common
+Common Report Var(flag_schedule_speculative_load)
Allow speculative motion of some loads
fsched-spec-load-dangerous
-Common
+Common Report Var(flag_schedule_speculative_load_dangerous)
Allow speculative motion of more loads
fsched-verbose=
-fsched-verbose=<number> Set the verbosity level of the scheduler
fsched2-use-superblocks
-Common
+Common Report Var(flag_sched2_use_superblocks)
If scheduling post reload, do superblock scheduling
fsched2-use-traces
-Common
+Common Report Var(flag_sched2_use_traces)
If scheduling post reload, do trace scheduling
fschedule-insns
-Common
+Common Report Var(flag_schedule_insns)
Reschedule instructions before register allocation
fschedule-insns2
-Common
+Common Report Var(flag_schedule_insns_after_reload)
Reschedule instructions after register allocation
+; sched_stalled_insns means that insns can be moved prematurely from the queue
+; of stalled insns into the ready list.
fsched-stalled-insns
-Common
+Common Report Var(flag_sched_stalled_insns)
Allow premature scheduling of queued insns
fsched-stalled-insns=
Common RejectNegative Joined UInteger
--fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled
+-fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled
+; sched_stalled_insns_dep controls how many recently scheduled cycles will
+; be examined for a dependency on a stalled insn that is candidate for
+; premature removal from the queue of stalled insns into the ready list (has
+; an effect only if the flag 'sched_stalled_insns' is set).
fsched-stalled-insns-dep
-Common
+Common Report Var(flag_sched_stalled_insns_dep,1) Init(1)
Set dependence distance checking in premature scheduling of queued insns
fsched-stalled-insns-dep=
Common RejectNegative Joined UInteger
--fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns
+-fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns
-fshared-data
-Common
-Mark data as shared rather than private
+fsection-anchors
+Common Report Var(flag_section_anchors)
+Access data in the same section from shared anchor points
+
+frtl-abstract-sequences
+Common Report Var(flag_rtl_seqabstr)
+Perform sequence abstraction optimization on RTL
+
+fshow-column
+Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1)
+Show column numbers in diagnostics, when available. Default on
fsignaling-nans
-Common
+Common Report Var(flag_signaling_nans)
Disable optimizations observable by IEEE signaling NaNs
fsingle-precision-constant
-Common
+Common Report Var(flag_single_precision_constant)
Convert floating point constants to single precision constants
+fsplit-ivs-in-unroller
+Common Report Var(flag_split_ivs_in_unroller) Init(1)
+Split lifetimes of induction variables when loops are unrolled
+
+fvariable-expansion-in-unroller
+Common Report Var(flag_variable_expansion_in_unroller)
+Apply variable expansion when loops are unrolled
+
+; Emit code to probe the stack, to help detect stack overflow; also
+; may cause large objects to be allocated dynamically.
fstack-check
-Common
+Common Report Var(flag_stack_check)
Insert stack checking code into the program
fstack-limit
Common RejectNegative Joined
-fstack-limit-symbol=<name> Trap if the stack goes past symbol <name>
+fstack-protector
+Common Report Var(flag_stack_protect, 1)
+Use propolice as a stack protection method
+
+fstack-protector-all
+Common Report RejectNegative Var(flag_stack_protect, 2) VarExists
+Use a stack protection method for every function
+
fstrength-reduce
Common
-Perform strength reduction optimizations
+Does nothing. Preserved for backward compatibility.
+; Nonzero if we should do (language-dependent) alias analysis.
+; Typically, this analysis will assume that expressions of certain
+; types do not alias expressions of certain other types. Only used
+; if alias analysis (in general) is enabled.
fstrict-aliasing
-Common
+Common Report Var(flag_strict_aliasing)
Assume strict aliasing rules apply
fsyntax-only
-Common
+Common Report Var(flag_syntax_only)
Check for syntax errors, then stop
ftest-coverage
-Common
+Common Report Var(flag_test_coverage)
Create data files needed by \"gcov\"
fthread-jumps
-Common
+Common Report Var(flag_thread_jumps)
Perform jump threading optimizations
ftime-report
-Common
+Common Report Var(time_report)
Report the time taken by each compiler pass
ftls-model=
Common Joined RejectNegative
-ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model
+ftoplevel-reorder
+Common Report Var(flag_toplevel_reorder) Init(1)
+Reorder top level functions, variables, and asms
+
ftracer
-Common
+Common Report Var(flag_tracer)
Perform superblock formation via tail duplication
+; Zero means that floating-point math operations cannot generate a
+; (user-visible) trap. This is the case, for example, in nonstop
+; IEEE 754 arithmetic.
ftrapping-math
-Common
+Common Report Var(flag_trapping_math) Init(1)
Assume floating-point operations can trap
ftrapv
-Common
+Common Report Var(flag_trapv)
Trap for signed overflow in addition, subtraction and multiplication
+ftree-ccp
+Common Report Var(flag_tree_ccp)
+Enable SSA-CCP optimization on trees
+
+ftree-store-ccp
+Common Report Var(flag_tree_store_ccp)
+Enable SSA-CCP optimization for stores and loads
+
+ftree-ch
+Common Report Var(flag_tree_ch)
+Enable loop header copying on trees
+
+ftree-combine-temps
+Common Report Var(flag_tree_combine_temps)
+Coalesce memory temporaries in the SSA->normal pass
+
+ftree-copyrename
+Common Report Var(flag_tree_copyrename)
+Replace SSA temporaries with better names in copies
+
+ftree-copy-prop
+Common Report Var(flag_tree_copy_prop)
+Enable copy propagation on trees
+
+ftree-store-copy-prop
+Common Report Var(flag_tree_store_copy_prop)
+Enable copy propagation for stores and loads
+
+ftree-dce
+Common Report Var(flag_tree_dce)
+Enable SSA dead code elimination optimization on trees
+
+ftree-dominator-opts
+Common Report Var(flag_tree_dom)
+Enable dominator optimizations
+
+ftree-dse
+Common Report Var(flag_tree_dse)
+Enable dead store elimination
+
+ftree-fre
+Common Report Var(flag_tree_fre)
+Enable Full Redundancy Elimination (FRE) on trees
+
+ftree-loop-im
+Common Report Var(flag_tree_loop_im) Init(1)
+Enable loop invariant motion on trees
+
+ftree-loop-linear
+Common Report Var(flag_tree_loop_linear)
+Enable linear loop transforms on trees
+
+ftree-loop-ivcanon
+Common Report Var(flag_tree_loop_ivcanon) Init(1)
+Create canonical induction variables in loops
+
+ftree-loop-optimize
+Common Report Var(flag_tree_loop_optimize) Init(1)
+Enable loop optimizations on tree level
+
+ftree-pre
+Common Report Var(flag_tree_pre)
+Enable SSA-PRE optimization on trees
+
+ftree-salias
+Common Report Var(flag_tree_salias)
+Perform structural alias analysis
+
+ftree-sink
+Common Report Var(flag_tree_sink)
+Enable SSA code sinking on trees
+
+ftree-sra
+Common Report Var(flag_tree_sra)
+Perform scalar replacement of aggregates
+
+ftree-ter
+Common Report Var(flag_tree_ter)
+Replace temporary expressions in the SSA->normal pass
+
+ftree-lrs
+Common Report Var(flag_tree_live_range_split)
+Perform live range splitting during the SSA->normal pass
+
+ftree-vrp
+Common Report Var(flag_tree_vrp) Init(0)
+Perform Value Range Propagation on trees
+
funit-at-a-time
-Common
+Common Report Var(flag_unit_at_a_time)
Compile whole compilation unit at a time
funroll-loops
-Common
+Common Report Var(flag_unroll_loops)
Perform loop unrolling when iteration count is known
funroll-all-loops
-Common
+Common Report Var(flag_unroll_all_loops)
Perform loop unrolling for all loops
+; Nonzero means that loop optimizer may assume that the induction variables
+; that control loops do not overflow and that the loops with nontrivial
+; exit condition are not infinite
+funsafe-loop-optimizations
+Common Report Var(flag_unsafe_loop_optimizations)
+Allow loop optimizations to assume that the loops behave in normal way
+
+; Nonzero means that unsafe floating-point math optimizations are allowed
+; for the sake of speed. IEEE compliance is not guaranteed, and operations
+; are allowed to assume that their arguments and results are "normal"
+; (e.g., nonnegative for SQRT).
funsafe-math-optimizations
-Common
+Common Report Var(flag_unsafe_math_optimizations)
Allow math optimizations that may violate IEEE or ISO standards
funswitch-loops
-Common
+Common Report Var(flag_unswitch_loops)
Perform loop unswitching
funwind-tables
-Common
+Common Report Var(flag_unwind_tables)
Just generate unwind tables for exception handling
+fvar-tracking
+Common Report Var(flag_var_tracking) VarExists
+Perform variable tracking
+
+ftree-vectorize
+Common Report Var(flag_tree_vectorize)
+Enable loop vectorization on trees
+
+ftree-vect-loop-version
+Common Report Var(flag_tree_vect_loop_version) Init(1)
+Enable loop versioning when doing loop vectorization on trees
+
+ftree-vectorizer-verbose=
+Common RejectNegative Joined
+-ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer
+
+; -fverbose-asm causes extra commentary information to be produced in
+; the generated assembly code (to make it more readable). This option
+; is generally only of use to those who actually need to read the
+; generated assembly code (perhaps while debugging the compiler itself).
+; -fno-verbose-asm, the default, causes the extra information
+; to not be added and is useful when comparing two assembler files.
fverbose-asm
-Common
+Common Report Var(flag_verbose_asm)
Add extra commentary to assembler output
+fvisibility=
+Common Joined RejectNegative
+-fvisibility=[default|internal|hidden|protected] Set the default symbol visibility
+
+
fvpt
-Common
+Common Report Var(flag_value_profile_transformations)
Use expression value profiles in optimizations
fweb
-Common
+Common Report Var(flag_web) Init(2)
Construct webs and split unrelated uses of single variable
+fwhole-program
+Common Report Var(flag_whole_program) Init(0)
+Perform whole program optimizations
+
fwrapv
-Common
+Common Report Var(flag_wrapv)
Assume signed arithmetic overflow wraps around
-fwritable-strings
-Common
-Store strings in writable data section
-
fzero-initialized-in-bss
-Common
+Common Report Var(flag_zero_initialized_in_bss) Init(1)
Put zero initialized data in the bss section
g
Common JoinedOrMissing
Generate debug information in extended XCOFF format
-m
-Common Joined
-
o
Common Joined Separate
-o <file> Place output into <file>
p
-Common
+Common Var(profile_flag)
Enable function profiling
pedantic
-Common
+Common Var(pedantic)
Issue warnings needed for strict compliance to the standard
pedantic-errors
Like -pedantic but issue them as errors
quiet
-Common
+Common Var(quiet_flag)
Do not display functions compiled or elapsed time
version
-Common
+Common Var(version_flag)
Display the compiler's version
w
-Common
+Common Var(inhibit_warnings)
Suppress warnings
; This comment is to ensure we retain the blank line above.
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