; Options for the language- and target-independent parts of the compiler.
-; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
+; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009
; Free Software Foundation, Inc.
;
; This file is part of GCC.
Common
Alias for --help=target
-;; The following three entries are to work around the gcc driver
+;; The following four entries are to work around the gcc driver
;; program's insatiable desire to turn options starting with a
;; double dash (--) into options starting with a dash f (-f).
fhelp
-Common
+Common Var(help_flag)
fhelp=
Common Joined
ftarget-help
Common
+fversion
+Common
+
-param
Common Separate
--param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters
Optimize for space rather than speed
W
-Common RejectNegative
+Common RejectNegative Var(extra_warnings) Warning
This switch is deprecated; use -Wextra instead
Waggregate-return
Common Var(warn_disabled_optimization) Warning
Warn when an optimization pass is disabled
-Wdisallowed-function-list=
-Common RejectNegative Joined Warning
-Warn on calls to these functions
-
Werror
Common Var(warnings_are_errors)
Treat all warnings as errors
Treat specified warning as error
Wextra
-Common Warning
+Common Var(extra_warnings) Warning
Print extra (possibly unwanted) warnings
Wfatal-errors
Common RejectNegative Joined UInteger Warning
-Wlarger-than=<number> Warn if an object is larger than <number> bytes
-Wlogical-op
-Common Warning Var(warn_logical_op)
-Warn when a logical operator is suspicously always evaluating to true or false
-
Wunsafe-loop-optimizations
Common Var(warn_unsafe_loop_optimizations) Warning
Warn if the loop cannot be optimized due to nontrivial assumptions.
Warn if a comparison is always true or always false due to the limited range of the data type
Wuninitialized
-Common Var(warn_uninitialized) Warning
+Common Var(warn_uninitialized) Init(-1) Warning
Warn about uninitialized automatic variables
Wunreachable-code
Warn about code that will never be executed
Wunused
-Common Warning
+Common Var(warn_unused) Init(0) Warning
Enable all -Wunused- warnings
Wunused-function
-Common Var(warn_unused_function) Warning
+Common Var(warn_unused_function) Init(-1) Warning
Warn when a function is unused
Wunused-label
-Common Var(warn_unused_label) Warning
+Common Var(warn_unused_label) Init(-1) Warning
Warn when a label is unused
Wunused-parameter
-Common Var(warn_unused_parameter) Warning
+Common Var(warn_unused_parameter) Init(-1) Warning
Warn when a function parameter is unused
Wunused-value
-Common Var(warn_unused_value) Warning
+Common Var(warn_unused_value) Init(-1) Warning
Warn when an expression value is unused
Wunused-variable
-Common Var(warn_unused_variable) Warning
+Common Var(warn_unused_variable) Init(-1) Warning
Warn when a variable is unused
Wcoverage-mismatch
Common Report Var(flag_no_common,0) Optimization
Do not put uninitialized globals in the common section
+fcompare-debug=
+Common JoinedOrMissing RejectNegative Var(flag_compare_debug_opt)
+-fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump
+
+fcompare-debug-second
+Common RejectNegative Var(flag_compare_debug)
+Run only the second compilation of -fcompare-debug
+
+fconserve-stack
+Common Var(flag_conserve_stack) Optimization
+Do not perform optimizations increasing noticeably stack usage
+
fcprop-registers
Common Report Var(flag_cprop_registers) Optimization
Perform a register copy-propagation optimization pass
When running CSE, follow jumps to their targets
fcse-skip-blocks
-Common Report Var(flag_cse_skip_blocks) Optimization
-When running CSE, follow conditional jumps
+Common
+Does nothing. Preserved for backward compatibility.
fcx-limited-range
Common Report Var(flag_cx_limited_range) Optimization
Attempt to fill delay slots of branch instructions
fdelete-null-pointer-checks
-Common Report Var(flag_delete_null_pointer_checks) Optimization
+Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization
Delete useless null pointer checks
fdiagnostics-show-location=
Common Joined RejectNegative
-fdump-<type> Dump various compiler internals to a file
+fdump-final-insns=
+Common RejectNegative Joined Var(flag_dump_final_insns)
+-fdump-final-insns=filename Dump to filename the insns at the end of translation
+
fdump-noaddr
Common Report Var(flag_dump_noaddr)
Suppress output of addresses in debugging dumps
Common Report Var(flag_dump_unnumbered) VarExists
Suppress output of instruction numbers, line number notes and addresses in debugging dumps
+fdump-unnumbered-links
+Common Report Var(flag_dump_unnumbered_links) VarExists
+Suppress output of previous and next insn numbers in debugging dumps
+
+fdwarf2-cfi-asm
+Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE)
+Enable CFI tables via GAS assembler directives.
+
fearly-inlining
Common Report Var(flag_early_inlining) Init(1) Optimization
Perform early inlining
Common Report Var(flag_eliminate_dwarf2_dups)
Perform DWARF2 duplicate elimination
+fipa-sra
+Common Report Var(flag_ipa_sra) Init(0) Optimization
+Perform interprocedural reduction of aggregates
+
feliminate-unused-debug-symbols
Common Report Var(flag_debug_only_used_symbols)
Perform unused type elimination in debug info
Common Report Var(flag_emit_class_debug_always) Init(0)
Do not suppress C++ class debug information.
+fenable-icf-debug
+Common Report Var(flag_enable_icf_debug)
+Generate debug information to support Identical Code Folding (ICF)
+
fexceptions
Common Report Var(flag_exceptions) Optimization
Enable exception handling
Common Report Var(flag_expensive_optimizations) Optimization
Perform a number of minor, expensive optimizations
+fexcess-precision=
+Common Joined RejectNegative
+-fexcess-precision=[fast|standard] Specify handling of excess floating-point precision
+
ffast-math
Common
Perform global common subexpression elimination after register allocation
has finished
+; This option is not documented yet as its semantics will change.
+fgraphite
+Common Report Var(flag_graphite)
+Enable in and out of Graphite representation
+
+fgraphite-identity
+Common Report Var(flag_graphite_identity) Optimization
+Enable Graphite Identity transformation
+
+floop-parallelize-all
+Common Report Var(flag_loop_parallelize_all) Optimization
+Mark all loops as parallel
+
+floop-strip-mine
+Common Report Var(flag_loop_strip_mine) Optimization
+Enable Loop Strip Mining transformation
+
+floop-interchange
+Common Report Var(flag_loop_interchange) Optimization
+Enable Loop Interchange transformation
+
+floop-block
+Common Report Var(flag_loop_block) Optimization
+Enable Loop Blocking transformation
+
fguess-branch-probability
Common Report Var(flag_guess_branch_prob) Optimization
Enable guessing of branch probabilities
Common Report Var(flag_inhibit_size_directive)
Do not generate .size directives
+findirect-inlining
+Common Report Var(flag_indirect_inlining)
+Perform indirect inlining
+
; 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 Report Var(flag_no_inline,0) Init(2)
+Common Report Var(flag_no_inline,0) Init(0)
Pay attention to the \"inline\" keyword
finline-small-functions
Common Report Var(flag_ipa_cp) Optimization
Perform Interprocedural constant propagation
+fipa-cp-clone
+Common Report Var(flag_ipa_cp_clone) Optimization
+Perform cloning to make Interprocedural constant propagation stronger
+
fipa-pure-const
Common Report Var(flag_ipa_pure_const) Init(0) Optimization
Discover pure and const functions
Perform structure layout optimizations based
on profiling information.
+fira-algorithm=
+Common Joined RejectNegative
+-fira-algorithm=[CB|priority] Set the used IRA algorithm
+
+fira-region=
+Common Joined RejectNegative
+-fira-region=[one|all|mixed] Set regions for IRA
+
+fira-coalesce
+Common Report Var(flag_ira_coalesce) Init(0)
+Do optimistic coalescing.
+
+fira-loop-pressure
+Common Report Var(flag_ira_loop_pressure)
+Use IRA based register pressure calculation
+in RTL loop optimizations.
+
+fira-share-save-slots
+Common Report Var(flag_ira_share_save_slots) Init(1)
+Share slots for saving different hard registers.
+
+fira-share-spill-slots
+Common Report Var(flag_ira_share_spill_slots) Init(1)
+Share stack slots for spilled pseudo-registers.
+
+fira-verbose=
+Common RejectNegative Joined UInteger
+-fira-verbose=<number> Control IRA's level of diagnostic messages.
+
fivopts
Common Report Var(flag_ivopts) Init(1) Optimization
Optimize induction variables on trees
Common
Does nothing. Preserved for backward compatibility.
+flto
+Common Var(flag_lto)
+Enable link-time optimization.
+
+; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h.
+flto-compression-level=
+Common Joined UInteger Var(flag_lto_compression_level) Init(-1)
+-flto-compression-level=<number> Use zlib compression level <number> for IL
+
+flto-report
+Common Report Var(flag_lto_report) Init(0) Optimization
+Report various link-time optimization statistics
+
fmath-errno
Common Report Var(flag_errno_math) Init(1) Optimization
Set errno after built-in math functions
Common Report Var(flag_pie,1) VarExists
Generate position-independent code for executables if possible (small mode)
+fplugin=
+Common Joined RejectNegative
+Specify a plugin to load
+
+fplugin-arg-
+Common Joined RejectNegative
+-fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name>
+
fpredictive-commoning
Common Report Var(flag_predictive_commoning) Optimization
Run predictive commoning optimization.
Set the top-level directory for storing the profile data.
The default is 'pwd'.
+fprofile-correction
+Common Report Var(flag_profile_correction)
+Enable correction of flow inconsistent profile data input
+
fprofile-generate
Common
Enable common options for generating profile info for profile feedback directed optimizations
Common Report Var(flag_schedule_interblock) Init(1) Optimization
Enable scheduling across basic blocks
+fsched-pressure
+Common Report Var(flag_sched_pressure) Init(0) Optimization
+Enable register pressure sensitive insn scheduling
+
fsched-spec
Common Report Var(flag_schedule_speculative) Init(1) Optimization
Allow speculative motion of non-loads
Common Report Var(flag_schedule_insns_after_reload) Optimization
Reschedule instructions after register allocation
+; This flag should be on when a target implements non-trivial
+; scheduling hooks, maybe saving some information for its own sake.
+; On IA64, for example, this is used for correct bundling.
+fselective-scheduling
+Common Report Var(flag_selective_scheduling) Optimization
+Schedule instructions using selective scheduling algorithm
+
+fselective-scheduling2
+Common Report Var(flag_selective_scheduling2) Optimization
+Run selective scheduling after reload
+
+fsel-sched-pipelining
+Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization
+Perform software pipelining of inner loops during selective scheduling
+
+fsel-sched-pipelining-outer-loops
+Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization
+Perform software pipelining of outer loops during selective scheduling
+
+fsel-sched-reschedule-pipelined
+Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization
+Reschedule pipelined regions without pipelining
+
; sched_stalled_insns means that insns can be moved prematurely from the queue
; of stalled insns into the ready list.
fsched-stalled-insns
Common RejectNegative Joined UInteger
-fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns
+fsched-group-heuristic
+Common Report Var(flag_sched_group_heuristic) Init(1) Optimization
+Enable the group heuristic in the scheduler
+
+fsched-critical-path-heuristic
+Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization
+Enable the critical path heuristic in the scheduler
+
+fsched-spec-insn-heuristic
+Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization
+Enable the speculative instruction heuristic in the scheduler
+
+fsched-rank-heuristic
+Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization
+Enable the rank heuristic in the scheduler
+
+fsched-last-insn-heuristic
+Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization
+Enable the last instruction heuristic in the scheduler
+
+fsched-dep-count-heuristic
+Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization
+Enable the dependent count heuristic in the scheduler
+
fsection-anchors
Common Report Var(flag_section_anchors) Optimization
Access data in the same section from shared anchor points
-frtl-abstract-sequences
-Common Report Var(flag_rtl_seqabstr) Optimization
-Perform sequence abstraction optimization on RTL
-
fsee
-Common Report Var(flag_see) Init(0)
-Eliminate redundant sign extensions using LCM.
+Common
+Does nothing. Preserved for backward compatibility.
fshow-column
-Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(0)
-Show column numbers in diagnostics, when available. Default off
+Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1)
+Show column numbers in diagnostics, when available. Default on
fsignaling-nans
Common Report Var(flag_signaling_nans) Optimization
Common Report Var(flag_variable_expansion_in_unroller) Optimization
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 Report RejectNegative Joined
+-fstack-check=[no|generic|specific] Insert stack checking code into the program
+
fstack-check
-Common Report Var(flag_stack_check)
-Insert stack checking code into the program
+Common Report
+Insert stack checking code into the program. Same as -fstack-check=specific
fstack-limit
Common
Enable SSA-CCP optimization on trees
ftree-store-ccp
-Common Report Var(flag_tree_store_ccp) Optimization
-Enable SSA-CCP optimization for stores and loads
+Common
+Does nothing. Preserved for backward compatibility.
ftree-ch
Common Report Var(flag_tree_ch) Optimization
Common Report Var(flag_tree_dse) Optimization
Enable dead store elimination
+ftree-forwprop
+Common Report Var(flag_tree_forwprop) Init(1) Optimization
+Enable forward propagation on trees
+
ftree-fre
Common Report Var(flag_tree_fre) Optimization
Enable Full Redundancy Elimination (FRE) on trees
Common Report Joined UInteger Var(flag_tree_parallelize_loops) Init(1)
Enable automatic parallelization of loops
+ftree-phiprop
+Common Report Var(flag_tree_phiprop) Init(1) Optimization
+Enable hoisting loads from conditional pointers.
+
ftree-pre
Common Report Var(flag_tree_pre) Optimization
Enable SSA-PRE optimization on trees
+ftree-pta
+Common Report Var(flag_tree_pta) Init(1) Optimization
+Perform function-local points-to analysis on trees.
+
ftree-reassoc
Common Report Var(flag_tree_reassoc) Init(1) Optimization
Enable reassociation on tree level
Common Report Var(flag_unwind_tables) Optimization
Just generate unwind tables for exception handling
+fuse-linker-plugin
+Common Undocumented
+
fvar-tracking
Common Report Var(flag_var_tracking) VarExists Optimization
Perform variable tracking
+fvar-tracking-assignments
+Common Report Var(flag_var_tracking_assignments) VarExists Optimization
+Perform variable tracking by annotating assignments
+
+fvar-tracking-assignments-toggle
+Common Report Var(flag_var_tracking_assignments_toggle) VarExists Optimization
+Toggle -fvar-tracking-assignments
+
fvar-tracking-uninit
Common Report Var(flag_var_tracking_uninit) Optimization
Perform variable tracking and also tag variables that are uninitialized
Common Report Var(flag_tree_vectorize) Optimization
Enable loop vectorization on trees
+ftree-slp-vectorize
+Common Report Var(flag_tree_slp_vectorize) Init(2) Optimization
+Enable basic block vectorization (SLP) on trees
+
fvect-cost-model
Common Report Var(flag_vect_cost_model) Optimization
Enable use of cost model in vectorization
Common Report Var(flag_web) Init(2) Optimization
Construct webs and split unrelated uses of single variable
+fwhopr
+Common Var(flag_whopr)
+Enable partitioned link-time optimization.
+
ftree-builtin-call-dce
Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization
Enable conditional dead code elimination for builtin calls
Generate debug information in default format
gcoff
-Common JoinedOrMissing Negative(gdwarf-2)
+Common JoinedOrMissing Negative(gdwarf-)
Generate debug information in COFF format
-gdwarf-2
-Common JoinedOrMissing Negative(gstabs)
-Generate debug information in DWARF v2 format
+gdwarf-
+Common Joined UInteger Var(dwarf_version) Init(2) Negative(gstabs)
+Generate debug information in DWARF v2 (or later) format
ggdb
Common JoinedOrMissing
Common JoinedOrMissing Negative(gvms)
Generate debug information in extended STABS format
+gno-strict-dwarf
+Common RejectNegative Var(dwarf_strict,0) Init(-1)
+Emit DWARF additions beyond selected version
+
+gstrict-dwarf
+Common Report RejectNegative Var(dwarf_strict,1) VarExists
+Don't emit DWARF additions beyond selected version
+
+gtoggle
+Common Report Var(flag_gtoggle)
+Toggle debug information generation
+
gvms
Common JoinedOrMissing Negative(gxcoff)
Generate debug information in VMS format
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