; Options for the language- and target-independent parts of the compiler.
-; Copyright (C) 2003 Free Software Foundation, Inc.
+
+; Copyright (C) 2003, 2004 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
-help
Common
+Display this information
-param
Common Separate
+--param <param>=<value> Set paramter <param> to value. See below for a complete list of parameters
-target-help
Common
G
Common Joined Separate UInteger
+-G<number> Put global and static data smaller than <number> bytes into a special section (on some targets)
O
Common JoinedOrMissing
+-O<number> Set optimization level to <number>
Os
Common
+Optimize for space rather than speed
W
Common RejectNegative
+This switch is deprecated; use -Wextra instead
Waggregate-return
-Common
+Common Var(warn_aggregate_return)
+Warn about returning structures, unions or arrays
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
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
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
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
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
Common
+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
aux-info
Common Separate
+-aux-info <file> Emit declaration information into <file>
aux-info=
Common Joined
d
Common Joined
+-d<letters> Enable dumps from specific passes of the compiler
dumpbase
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. True in Fortran.
+; The value is ignored if flag_alias_check is 0.
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
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 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-saved-<register> Mark <register> as being preserved across functions
fcall-used-
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
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-
+Common Joined RejectNegative
+-fdump-<type> Dump various compiler internals to a file
fdump-unnumbered
-Common
+Common Report Var(flag_dump_unnumbered) VarExists
+Suppress output of instruction numbers and line number notes in debugging dumps
feliminate-dwarf2-dups
-Common
+Common Report Var(flag_eliminate_dwarf2_dups)
+Perform DWARF2 duplicate elimination
+
+feliminate-unused-debug-symbols
+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
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-
Common Joined RejectNegative
+-ffixed-<register> Mark <register> as being unavailable to the compiler
ffloat-store
-Common
+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(1)
+Perform store motion after global common subexpression elimination
-fgnu-linker
-Common
+fgcse-las
+Common Report Var(flag_gcse_las) Init(1)
+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-limit-
+Common RejectNegative Joined UInteger
+
+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
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
+Common Report Var(flag_loop_optimize)
+Perform loop optimizations
+
+floop-optimize2
+Common Report Var(flag_loop_optimize2)
+Perform loop optimizations using the new loop optimizer
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
+
+fmodulo-sched
+Common Report Var(flag_modulo_sched)
+Perform SMS based modulo scheduling before the first scheduling pass
fmove-all-movables
-Common
+Common Report Var(flag_move_all_movables)
+Force all loop invariant computations out of loops
+
+fmove-loop-invariants
+Common Report Var(flag_move_loop_invariants)
+Move loop invariant computations out of loops
+
+fmudflap
+Common RejectNegative Report Var(flag_mudflap)
+Add mudflap bounds-checking instrumentation for single-threaded program.
+
+fmudflapth
+Common RejectNegative Report Var(flag_mudflap_threads)
+Add mudflap bounds-checking instrumentation for multi-threaded program.
+
+fmudflapir
+Common RejectNegative Report Var(flag_mudflap_ignore_reads)
+Ignore read operations when inserting mudflap instrumentation.
fnew-ra
-Common
+Common Report Var(flag_new_regalloc)
+Use graph-coloring register allocation
+
+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
+Common Report Var(flag_non_call_exceptions)
+Support synchronous non-call exceptions
fold-unroll-loops
-Common
+Common Report Var(flag_old_unroll_loops)
+Perform loop unrolling when iteration count is known
fold-unroll-all-loops
-Common
+Common Report Var(flag_old_unroll_all_loops)
+Perform loop unrolling for all loops
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
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
+Common Report Var(flag_pic,1) VarExists
+Generate position-independent code if possible (small mode)
fpie
-Common
+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 Report Var(profile_arc_flag)
+Insert arc-based program profiling code
+
+fprofile-generate
Common
+Enable common options for generating profile info for profile feedback directed optimizations
+
+fprofile-use
+Common
+Enable common options for performing profile feedback directed optimizations
+
+fprofile-values
+Common Report Var(flag_profile_values)
+Insert code to profile values of expressions
frandom-seed
Common
frandom-seed=
Common Joined RejectNegative
+-frandom-seed=<string> Make compile reproducible using <string>
freduce-all-givs
-Common
+Common Report Var(flag_reduce_all_givs)
+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)
+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)
+Add a common subexpression elimination pass after loop optimizations
frerun-loop-opt
-Common
+Common Report Var(flag_rerun_loop_opt)
+Run the loop optimizer twice
+
+frounding-math
+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=
Common RejectNegative Joined
+-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 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
+
+; 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 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
fshared-data
-Common
+Common Report Var(flag_shared_data)
+Mark data as shared rather than private
fsignaling-nans
-Common
+Common Report Var(flag_signaling_nans)
+Disable optimizations observable by IEEE signaling NaNs
fsingle-precision-constant
-Common
-
-fssa
-Common
-
-fssa-ccp
-Common
-
-fssa-dce
-Common
+Common Report Var(flag_single_precision_constant)
+Convert floating point constants to single precision constants
+; 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
fstack-limit-register=
Common RejectNegative Joined
+-fstack-limit-register=<register> Trap if the stack goes past <register>
fstack-limit-symbol=
Common RejectNegative Joined
+-fstack-limit-symbol=<name> Trap if the stack goes past symbol <name>
fstrength-reduce
-Common
+Common Report Var(flag_strength_reduce)
+Perform strength reduction optimizations
+; 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
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)
+Assume floating-point operations can trap
ftrapv
-Common
+Common Report Var(flag_trapv)
+Trap for signed overflow in addition, subtraction and multiplication
+
+ftree-based-profiling
+Common Report Var(flag_tree_based_profiling)
+Use tree-ssa based implementation of profiling
+
+ftree-ccp
+Common Report Var(flag_tree_ccp)
+Enable SSA-CCP optimization on trees
+
+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-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-lim
+Common Report Var(flag_tree_lim) Init(1)
+Enable loop invariant motion on trees
+
+ftree-loop-optimize
+Common Report Var(flag_tree_loop_optimize) Init(1)
+Enable loop optimizations on tree level
+
+ftree-points-to=
+Common Joined RejectNegative
+
+ftree-pre
+Common Report Var(flag_tree_pre)
+Enable SSA-PRE optimization 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.
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 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
+
+; -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
-fwrapv
-Common
+fvisibility=
+Common Joined RejectNegative
+-fvisibility=[default|internal|hidden|protected] Set the default symbol visibility
-fwritable-strings
-Common
+
+fvpt
+Common Report Var(flag_value_profile_transformations)
+Use expression value profiles in optimizations
+
+fweb
+Common Report Var(flag_web) VarExists
+Construct webs and split unrelated uses of single variable
+
+fwrapv
+Common Report Var(flag_wrapv)
+Assume signed arithmetic overflow wraps around
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 default format
+
+gcoff
+Common JoinedOrMissing
+Generate debug information in COFF format
+
+gdwarf-2
+Common JoinedOrMissing
+Generate debug information in DWARF v2 format
+
+ggdb
+Common JoinedOrMissing
+Generate debug information in default extended format
+
+gstabs
+Common JoinedOrMissing
+Generate debug information in STABS format
+
+gstabs+
+Common JoinedOrMissing
+Generate debug information in extended STABS format
+
+gvms
+Common JoinedOrMissing
+Generate debug information in VMS format
+
+gxcoff
+Common JoinedOrMissing
+Generate debug information in XCOFF format
+
+gxcoff+
+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
Common
+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.