X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fcommon.opt;h=13bbf9e75884e2c342df26553a8148f83844f17f;hb=dbef28539a4d2bb036dd942eab140580bcda9cae;hp=82a4e75e89094bc0d84664fa74ed695459b83f67;hpb=2862cf8840cb7af53bf67b250a95a9ad9b82de83;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/common.opt b/gcc/common.opt index 82a4e75e890..13bbf9e7588 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1,6 +1,6 @@ ; Options for the language- and target-independent parts of the compiler. -; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 +; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 ; Free Software Foundation, Inc. ; ; This file is part of GCC. @@ -23,43 +23,416 @@ ; Please try to keep this file in ASCII collating order. +Variable +int target_flags + +Variable +int optimize + +Variable +int optimize_size + +; Not used directly to control optimizations, only to save -Ofast +; setting for "optimize" attributes. +Variable +int optimize_fast + +; True if this is the lto front end. This is used to disable gimple +; generation and lowering passes that are normally run on the output +; of a front end. These passes must be bypassed for lto since they +; have already been done before the gimple was written. +Variable +bool in_lto_p = false + +; 0 means straightforward implementation of complex divide acceptable. +; 1 means wide ranges of inputs must work for complex divide. +; 2 means C99-like requirements for complex multiply and divide. +Variable +int flag_complex_method = 1 + +; Nonzero if subexpressions must be evaluated from left-to-right. +Variable +int flag_evaluation_order = 0 + +; Language specific warning pass for unused results. +Variable +bool flag_warn_unused_result = false + +Variable +int *param_values + +; Nonzero if we should write GIMPLE bytecode for link-time optimization. +Variable +int flag_generate_lto + +; True to warn about any objects definitions whose size is larger +; than N bytes. Also want about function definitions whose returned +; values are larger than N bytes, where N is 'larger_than_size'. +Variable +bool warn_larger_than + +Variable +HOST_WIDE_INT larger_than_size + +; True to warn about any function whose frame size is larger +; than N bytes. +Variable +bool warn_frame_larger_than + +Variable +HOST_WIDE_INT frame_larger_than_size + +; Nonzero means we should be saving declaration info into a .X file. +Variable +int flag_gen_aux_info = 0 + +; Nonzero if we are compiling code for a shared library, zero for +; executable. +Variable +int flag_shlib + +; These two are really VEC(char_p,heap) *. + +Variable +void *flag_instrument_functions_exclude_functions + +Variable +void *flag_instrument_functions_exclude_files + +; Generic structs (e.g. templates not explicitly specialized) +; may not have a compilation unit associated with them, and so +; may need to be treated differently from ordinary structs. +; +; Structs only handled by reference (indirectly), will also usually +; not need as much debugging information. + +Variable +enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } + +Variable +enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } + +; True if we should exit after parsing options. +Variable +bool exit_after_options + +; Type(s) of debugging information we are producing (if any). See +; flag-types.h for the definitions of the different possible types of +; debugging information. +Variable +enum debug_info_type write_symbols = NO_DEBUG + +; Level of debugging information we are producing. See flag-types.h +; for the definitions of the different possible levels. +Variable +enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE + +; Nonzero means use GNU-only extensions in the generated symbolic +; debugging information. Currently, this only has an effect when +; write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. +Variable +bool use_gnu_debug_info_extensions + +; Original value of maximum field alignment in bytes, specified via +; -fpack-struct=. +Variable +unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT + +Variable +enum vect_verbosity_levels user_vect_verbosity_level = MAX_VERBOSITY_LEVEL + +; Type of stack check. +Variable +enum stack_check_type flag_stack_check = NO_STACK_CHECK + +; True if stack usage information needs to be computed. +Variable +bool flag_stack_usage_info = false + +; -dA causes debug 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). +; Currently, this switch is only used by dwarf2out.c; however, it is intended +; to be a catchall for printing debug information in the assembler file. +Variable +int flag_debug_asm + +; -dP causes the rtl to be emitted as a comment in assembly. +Variable +int flag_dump_rtl_in_asm + +; Whether -da was passed (used only in handle_common_deferred_options). +Variable +bool flag_dump_all_passed + +; Other flags saying which kinds of debugging dump have been requested. + +Variable +int rtl_dump_and_exit + +Variable +int flag_print_asm_name + +Variable +enum graph_dump_types graph_dump_format = no_graph + +; Name of top-level original source file (what was input to cpp). +; This comes from the #-command at the beginning of the actual input. +; If there isn't any there, then this is the cc1 input file name. +Variable +const char *main_input_filename + +; Pointer to base name in main_input_filename, with directories and a +; single final extension removed, and the length of this base +; name. + +Variable +const char *main_input_basename + +Variable +int main_input_baselength + +; Which options have been printed by --help. +Variable +char *help_printed + +; Which enums have been printed by --help. 0 = not printed, no +; relevant options seen, 1 = relevant option seen, not yet printed, 2 +; = printed. +Variable +char *help_enum_printed + +; The number of columns for --help output. +Variable +unsigned int help_columns + +; Whether this options structure has been through finish_options +Variable +bool flag_opts_finished + +### +Driver + +-assemble +Driver Alias(S) + +-compile +Driver Alias(c) + +-coverage +Driver Alias(coverage) + +-debug +Common Alias(g) + +-dump +Common Separate Alias(d) + +-dump= +Common Joined Alias(d) + +-dumpbase +Common Separate Alias(dumpbase) + +-dumpdir +Common Separate Alias(dumpdir) + +-entry +Driver Separate Alias(e) + +-entry= +Driver Joined Alias(e) + +-extra-warnings +Common Warning Alias(Wextra) + +-for-assembler +Driver Separate Alias(Xassembler) + +-for-assembler= +Driver JoinedOrMissing Alias(Xassembler) + +-for-linker +Driver Separate Alias(Xlinker) + +-for-linker= +Driver JoinedOrMissing Alias(Xlinker) + +-force-link +Driver Separate Alias(u) + +-force-link= +Driver Joined Alias(u) + -help -Common +Common Driver Var(help_flag) Display this information -help= -Common Report Joined +Common Driver Report Joined --help= Display descriptions of a specific class of options. is one or more of optimizers, target, warnings, undocumented, params +-language +Driver Separate Alias(x) + +-language= +Driver Joined Alias(x) + +-library-directory +Driver Separate Alias(L) + +-library-directory= +Driver Joined Alias(L) + +-no-canonical-prefixes +Driver Alias(no-canonical-prefixes) + +-no-standard-libraries +Driver Alias(nostdlib) + +-no-warnings +Common Alias(w) + +-optimize +Common Alias(O) + +-output +Common Driver Separate Alias(o) MissingArgError(missing filename after %qs) + +-output= +Common Driver Joined Alias(o) MissingArgError(missing filename after %qs) + +-pass-exit-codes +Driver Alias(pass-exit-codes) + +-pedantic +Common Alias(pedantic) + +-pedantic-errors +Common Alias(pedantic-errors) + +-pie +Common Alias(pie) + +-pipe +Driver Alias(pipe) + +-prefix +Driver Separate Alias(B) + +-prefix= +Driver JoinedOrMissing Alias(B) + +-preprocess +Driver Alias(E) + +-print-file-name +Driver Separate Alias(print-file-name=) + +-print-file-name= +Driver JoinedOrMissing Alias(print-file-name=) + +-print-libgcc-file-name +Driver Alias(print-libgcc-file-name) + +-print-multi-directory +Driver Alias(print-multi-directory) + +-print-multi-lib +Driver Alias(print-multi-lib) + +-print-multi-os-directory +Driver Alias(print-multi-os-directory) + +-print-prog-name +Driver Separate Alias(print-prog-name=) + +-print-prog-name= +Driver JoinedOrMissing Alias(print-prog-name=) + +-print-search-dirs +Driver Alias(print-search-dirs) + +-print-sysroot +Driver Alias(print-sysroot) + +-print-sysroot-headers-suffix +Driver Alias(print-sysroot-headers-suffix) + +-profile +Common Alias(p) + +-save-temps +Driver Alias(save-temps) + +-shared +Common Alias(shared) + +-specs +Driver Separate Alias(specs=) + +-specs= +Driver Joined Alias(specs=) + +-static +Driver Alias(static) + +-symbolic +Driver Alias(symbolic) + -target-help -Common +Common Driver Alias for --help=target -;; 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). +-time +Driver Alias(time) + +-verbose +Driver Alias(v) + +;; The driver used to convert options such as --help into forms such +;; as -fhelp; the following four entries are for compatibility with +;; any direct uses of those (undocumented) -f forms fhelp -Common Var(help_flag) +Common Driver Alias(-help) fhelp= -Common Joined +Common Driver Joined Alias(-help=) ftarget-help -Common +Common Driver Alias(-target-help) fversion -Common +Common Driver Alias(-version) -param Common Separate --param = Set parameter to value. See below for a complete list of parameters +-param= +Common Joined Alias(-param) + +-sysroot +Driver Separate Alias(-sysroot=) + +-sysroot= +Driver JoinedOrMissing + -version -Common +Common Driver -G -Common Joined Separate UInteger --G Put global and static data smaller than bytes into a special section (on some targets) +B +Driver Joined Separate + +E +Driver + +L +Driver Joined Separate + +N +Driver O Common JoinedOrMissing Optimization @@ -73,10 +446,55 @@ Ofast Common Optimization Optimize for speed disregarding exact standards compliance +Q +Driver + +Qn +Driver Negative(Qy) + +Qy +Driver Negative(Qn) + +R +Driver Joined Separate + +S +Driver + +T +Driver Joined Separate + +Tbss +Driver Separate + +Tbss= +Driver Joined + +Tdata +Driver Separate + +Tdata= +Driver Joined + +Ttext +Driver Separate + +Ttext= +Driver Joined + W -Common RejectNegative Var(extra_warnings) Warning +Common RejectNegative Warning Alias(Wextra) This switch is deprecated; use -Wextra instead +Wa, +Driver JoinedOrMissing + +Wl, +Driver JoinedOrMissing + +Wp, +Driver JoinedOrMissing + Waggregate-return Common Var(warn_aggregate_return) Warning Warn about returning structures, unions or arrays @@ -125,12 +543,16 @@ Wframe-larger-than= Common RejectNegative Joined UInteger -Wframe-larger-than= Warn if a function's stack frame requires more than bytes +Wfree-nonheap-object +Common Var(warn_free_nonheap_object) Init(1) Warning +Warn when attempting to free a non-heap object + Winline Common Var(warn_inline) Warning Warn when an inlined function cannot be inlined Wlarger-than- -Common RejectNegative Joined UInteger Warning Undocumented +Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) Wlarger-than= Common RejectNegative Joined UInteger Warning @@ -168,6 +590,10 @@ Wstack-protector Common Var(warn_stack_protect) Warning Warn when not issuing stack smashing protection for some reason +Wstack-usage= +Common Joined RejectNegative UInteger Var(warn_stack_usage) Init(-1) Warning +Warn if stack usage might be larger than specified amount + Wstrict-aliasing Common Warning Warn about code which might break strict aliasing rules @@ -212,6 +638,10 @@ Wsystem-headers Common Var(warn_system_headers) Warning Do not suppress warnings from system headers +Wtrampolines +Common Var(warn_trampolines) Warning +Warn whenever a trampoline is generated + Wtype-limits Common Var(warn_type_limits) Init(-1) Warning Warn if a comparison is always true or always false due to the limited range of the data type @@ -220,8 +650,12 @@ Wuninitialized Common Var(warn_uninitialized) Init(-1) Warning Warn about uninitialized automatic variables +Wmaybe-uninitialized +Common Var(warn_maybe_uninitialized) Warning +Warn about maybe uninitialized automatic variables + Wunreachable-code -Common +Common Ignore Does nothing. Preserved for backward compatibility. Wunused @@ -260,31 +694,72 @@ Wcoverage-mismatch Common Var(warn_coverage_mismatch) Init(1) Warning Warn in case profiles in -fprofile-use do not match +Wvector-operation-performance +Common Var(warn_vector_operation_performance) Warning +Warn when a vector operation is compiled outside the SIMD + +Xassembler +Driver Separate + +Xlinker +Driver Separate + +Xpreprocessor +Driver Separate + +Z +Driver + aux-info -Common Separate +Common Separate Var(aux_info_file_name) -aux-info Emit declaration information into aux-info= -Common Joined +Common Joined Alias(aux-info) auxbase -Common Separate +Common Separate RejectDriver Var(aux_base_name) auxbase-strip -Common Separate +Common Separate RejectDriver + +coverage +Driver + +c +Driver d Common Joined -d Enable dumps from specific passes of the compiler dumpbase -Common Separate +Common Separate Var(dump_base_name) -dumpbase Set the file basename to be used for dumps dumpdir -Common Separate +Common Separate Var(dump_dir_name) -dumpdir Set the directory name to be used for dumps +dumpmachine +Driver + +dumpspecs +Driver + +dumpversion +Driver + +e +Driver Joined Separate + +; This option has historically been passed down to the linker by an +; accident of a %{e*} spec, so ensure it continues to be passed down +; as a single option. The supported option for this purpose is +; -rdynamic. See PR 47390. +export-dynamic +Driver Undocumented + ; 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 @@ -300,7 +775,15 @@ Common Separate ; in template non-type arguments of pointer type. ; ; 4: The version of the ABI that introduces unambiguous mangling of -; vector types. +; vector types. First selectable in G++ 4.5. +; +; 5: The version of the ABI that ignores attribute const/noreturn +; in function pointer mangling, and corrects mangling of decltype and +; function parameters used in other parameters and the return type. +; First selectable in G++ 4.6. +; +; 6: The version of the ABI that doesn't promote scoped enums to int. +; First selectable in G++ 4.7. ; ; Additional positive integers will be assigned as new versions of ; the ABI become the default version of the ABI. @@ -312,43 +795,43 @@ Common Report Var(align_functions,0) Optimization UInteger Align the start of functions falign-functions= -Common RejectNegative Joined UInteger +Common RejectNegative Joined UInteger Var(align_functions) falign-jumps Common Report Var(align_jumps,0) Optimization UInteger Align labels which are only reached by jumping falign-jumps= -Common RejectNegative Joined UInteger +Common RejectNegative Joined UInteger Var(align_jumps) falign-labels Common Report Var(align_labels,0) Optimization UInteger Align all labels falign-labels= -Common RejectNegative Joined UInteger +Common RejectNegative Joined UInteger Var(align_labels) falign-loops -Common Report Var(align_loops) Optimization UInteger +Common Report Var(align_loops,0) Optimization UInteger Align the start of loops falign-loops= -Common RejectNegative Joined UInteger +Common RejectNegative Joined UInteger Var(align_loops) fargument-alias -Common +Common Ignore Does nothing. Preserved for backward compatibility. fargument-noalias -Common +Common Ignore Does nothing. Preserved for backward compatibility. fargument-noalias-global -Common +Common Ignore Does nothing. Preserved for backward compatibility. fargument-noalias-anything -Common +Common Ignore Does nothing. Preserved for backward compatibility. fasynchronous-unwind-tables @@ -388,11 +871,11 @@ Common Report Var(flag_btr_bb_exclusive) Optimization Restrict target load migration not to re-use registers in any basic block fcall-saved- -Common Joined RejectNegative +Common Joined RejectNegative Var(common_deferred_options) Defer -fcall-saved- Mark as being preserved across functions fcall-used- -Common Joined RejectNegative +Common Joined RejectNegative Var(common_deferred_options) Defer -fcall-used- Mark as being corrupted by function calls ; Nonzero for -fcaller-saves: allocate values in regs that need to @@ -406,18 +889,30 @@ fcheck-data-deps Common Report Var(flag_check_data_deps) Compare the results of several data dependence analyzers. +fcombine-stack-adjustments +Common Report Var(flag_combine_stack_adjustments) Optimization +Looks for opportunities to reduce stack adjustments and stack references. + fcommon Common Report Var(flag_no_common,0) Optimization Do not put uninitialized globals in the common section +fcompare-debug +Driver +; Converted by the driver to -fcompare-debug= options. + fcompare-debug= -Common JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) +Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) -fcompare-debug[=] Compile with and without e.g. -gtoggle, and compare the final-insns dump fcompare-debug-second -Common RejectNegative Var(flag_compare_debug) +Common Driver RejectNegative Var(flag_compare_debug) Run only the second compilation of -fcompare-debug +fcompare-elim +Common Report Var(flag_compare_elim_after_reload) Optimization +Perform comparison elimination after register allocation has finished + fconserve-stack Common Var(flag_conserve_stack) Optimization Do not perform optimizations increasing noticeably stack usage @@ -435,11 +930,11 @@ Common Report Var(flag_cse_follow_jumps) Optimization When running CSE, follow jumps to their targets fcse-skip-blocks -Common +Common Ignore Does nothing. Preserved for backward compatibility. fcx-limited-range -Common Report Var(flag_cx_limited_range) Optimization +Common Report Var(flag_cx_limited_range) Optimization SetByCombined Omit range reduction step when performing complex division fcx-fortran-rules @@ -451,17 +946,21 @@ Common Report Var(flag_data_sections) Optimization Place data items into their own section fdbg-cnt-list -Common Report +Common Report Var(common_deferred_options) Defer List all available debugging counters with their limits and counts. fdbg-cnt= -Common RejectNegative Joined +Common RejectNegative Joined Var(common_deferred_options) Defer -fdbg-cnt=:[,:,...] Set the debug counter limit. fdebug-prefix-map= -Common Joined RejectNegative +Common Joined RejectNegative Var(common_deferred_options) Defer Map one directory name to another in debug information +fdebug-types-section +Common Report Var(flag_debug_types_section) Init(1) +Output .debug_types section when using DWARF v4 debuginfo. + ; 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 @@ -476,32 +975,68 @@ fdelete-null-pointer-checks Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization Delete useless null pointer checks +fdevirtualize +Common Report Var(flag_devirtualize) Optimization +Try to convert virtual calls to direct ones. + fdiagnostics-show-location= -Common Joined RejectNegative +Common Joined RejectNegative Enum(diagnostic_prefixing_rule) -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics +; Required for these enum values. +SourceInclude +pretty-print.h + +Enum +Name(diagnostic_prefixing_rule) Type(int) + +EnumValue +Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) + +EnumValue +Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) + fdiagnostics-show-option Common Var(flag_diagnostics_show_option) Init(1) Amend appropriate diagnostic messages with the command line option that controls them +fdisable- +Common Joined RejectNegative Var(common_deferred_options) Defer +-fdisable-[tree|rtl|ipa]-=range1+range2 disables an optimization pass + +fenable- +Common Joined RejectNegative Var(common_deferred_options) Defer +-fenable-[tree|rtl|ipa]-=range1+range2 enables an optimization pass + fdump- -Common Joined RejectNegative +Common Joined RejectNegative Var(common_deferred_options) Defer -fdump- Dump various compiler internals to a file +fdump-final-insns +Driver RejectNegative + 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-go-spec= +Common RejectNegative Joined Var(flag_dump_go_spec) +-fdump-go-spec=filename Write all declarations to file as Go code + fdump-noaddr Common Report Var(flag_dump_noaddr) Suppress output of addresses in debugging dumps +fdump-passes +Common Var(flag_dump_passes) Init(0) +Dump optimization passes + fdump-unnumbered -Common Report Var(flag_dump_unnumbered) VarExists +Common Report Var(flag_dump_unnumbered) Suppress output of instruction numbers, line number notes and addresses in debugging dumps fdump-unnumbered-links -Common Report Var(flag_dump_unnumbered_links) VarExists +Common Report Var(flag_dump_unnumbered_links) Suppress output of previous and next insn numbers in debugging dumps fdwarf2-cfi-asm @@ -532,10 +1067,6 @@ femit-class-debug-always 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 @@ -545,18 +1076,31 @@ Common Report Var(flag_expensive_optimizations) Optimization Perform a number of minor, expensive optimizations fexcess-precision= -Common Joined RejectNegative +Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT) -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision +Enum +Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) + +EnumValue +Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) + +EnumValue +Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) + ffast-math Common +ffat-lto-objects +Common Var(flag_fat_lto_objects) Init(1) +Output lto objects containing both the intermediate language and binary output. + ffinite-math-only -Common Report Var(flag_finite_math_only) Optimization +Common Report Var(flag_finite_math_only) Optimization SetByCombined Assume no NaNs or infinities are generated ffixed- -Common Joined RejectNegative +Common Joined RejectNegative Var(common_deferred_options) Defer -ffixed- Mark as being unavailable to the compiler ffloat-store @@ -564,13 +1108,30 @@ Common Report Var(flag_float_store) Optimization Don't allocate floats and doubles in extended-precision registers fforce-addr -Common +Common Ignore Does nothing. Preserved for backward compatibility. fforward-propagate Common Report Var(flag_forward_propagate) Optimization Perform a forward propagation pass on RTL +ffp-contract= +Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) +-ffp-contract=[off|on|fast] Perform floating-point expression contraction. + +Enum +Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) + +EnumValue +Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) + +; Not implemented, fall back to conservative FP_CONTRACT_OFF. +EnumValue +Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) + +EnumValue +Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) + ; 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. @@ -629,6 +1190,10 @@ floop-block Common Report Var(flag_loop_block) Optimization Enable Loop Blocking transformation +floop-flatten +Common Report Var(flag_loop_flatten) Optimization +Enable Loop Flattening transformation + fstrict-volatile-bitfields Common Report Var(flag_strict_volatile_bitfields) Init(-1) Force bitfield accesses to match their type width @@ -653,6 +1218,14 @@ fif-conversion2 Common Report Var(flag_if_conversion2) Optimization Perform conversion of conditional jumps to conditional execution +ftree-loop-if-convert +Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization +Convert conditional jumps in innermost loops to branchless equivalents + +ftree-loop-if-convert-stores +Common Report Var(flag_tree_loop_if_convert_stores) Optimization +Also if-convert conditional jumps containing memory writes + ; -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 @@ -683,11 +1256,11 @@ Common Report Var(flag_inline_functions) Optimization Integrate simple functions into their callers finline-functions-called-once -Common Report Var(flag_inline_functions_called_once) Init(1) Optimization +Common Report Var(flag_inline_functions_called_once) Optimization Integrate functions called once into their callers finline-limit- -Common RejectNegative Joined UInteger +Common RejectNegative Joined Alias(finline-limit=) finline-limit= Common RejectNegative Joined UInteger @@ -735,21 +1308,37 @@ Perform matrix layout flattening and transposing based on profiling information. fipa-struct-reorg -Common Report Var(flag_ipa_struct_reorg) -Perform structure layout optimizations based -on profiling information. +Common Ignore +Does nothing. Preserved for backward compatibility. fira-algorithm= -Common Joined RejectNegative +Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) -fira-algorithm=[CB|priority] Set the used IRA algorithm +Enum +Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) + +EnumValue +Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) + +EnumValue +Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) + fira-region= -Common Joined RejectNegative +Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_MIXED) -fira-region=[one|all|mixed] Set regions for IRA -fira-coalesce -Common Report Var(flag_ira_coalesce) Init(0) -Do optimistic coalescing. +Enum +Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) + +EnumValue +Enum(ira_region) String(one) Value(IRA_REGION_ONE) + +EnumValue +Enum(ira_region) String(all) Value(IRA_REGION_ALL) + +EnumValue +Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) fira-loop-pressure Common Report Var(flag_ira_loop_pressure) @@ -789,13 +1378,29 @@ Common Report Var(flag_leading_underscore) Init(-1) Give external symbols a leading underscore floop-optimize -Common +Common Ignore Does nothing. Preserved for backward compatibility. flto -Common Var(flag_lto) +Common Enable link-time optimization. +flto= +Common RejectNegative Joined Var(flag_lto) +Link-time optimization with number of parallel jobs or jobserver. + +flto-partition=1to1 +Common Var(flag_lto_partition_1to1) +Partition functions and vars at linktime based on object files they originate from + +flto-partition=balanced +Common Var(flag_lto_partition_balanced) +Partition functions and vars at linktime into approximately same sized buckets + +flto-partition=none +Common Var(flag_lto_partition_none) +Disable partioning and streaming + ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. flto-compression-level= Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) @@ -806,9 +1411,13 @@ 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 +Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined Set errno after built-in math functions +fmax-errors= +Common Joined RejectNegative UInteger Var(flag_max_errors) +-fmax-errors= Maximum number of errors to report + fmem-report Common Report Var(mem_report) Report on permanent memory allocation @@ -821,7 +1430,7 @@ Common Report Var(flag_merge_constants,2) Init(1) Optimization Attempt to merge identical constants and constant variables fmerge-constants -Common Report Var(flag_merge_constants,1) VarExists Optimization +Common Report Var(flag_merge_constants,1) Optimization Attempt to merge identical constants across compilation units fmerge-debug-strings @@ -849,7 +1458,7 @@ Common RejectNegative Report Var(flag_mudflap) Add mudflap bounds-checking instrumentation for single-threaded program fmudflapth -Common RejectNegative Report VarExists Var(flag_mudflap,2) +Common RejectNegative Report Var(flag_mudflap,2) Add mudflap bounds-checking instrumentation for multi-threaded program fmudflapir @@ -929,19 +1538,19 @@ Common Report Var(flag_pie,2) Generate position-independent code for executables if possible (large mode) fpic -Common Report Var(flag_pic,1) VarExists +Common Report Var(flag_pic,1) Generate position-independent code if possible (small mode) fpie -Common Report Var(flag_pie,1) VarExists +Common Report Var(flag_pie,1) Generate position-independent code for executables if possible (small mode) fplugin= -Common Joined RejectNegative +Common Joined RejectNegative Var(common_deferred_options) Defer Specify a plugin to load fplugin-arg- -Common Joined RejectNegative +Common Joined RejectNegative Var(common_deferred_options) Defer -fplugin-arg--[=] Specify argument = for plugin fpredictive-commoning @@ -949,7 +1558,7 @@ Common Report Var(flag_predictive_commoning) Optimization Run predictive commoning optimization. fprefetch-loop-arrays -Common Report Var(flag_prefetch_loop_arrays) Optimization +Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization Generate prefetch instructions, if available, for arrays in loops fprofile @@ -961,7 +1570,7 @@ Common Report Var(profile_arc_flag) Insert arc-based program profiling code fprofile-dir= -Common Joined RejectNegative +Common Joined RejectNegative Var(profile_data_prefix) Set the top-level directory for storing the profile data. The default is 'pwd'. @@ -990,10 +1599,10 @@ Common Report Var(flag_profile_values) Insert code to profile values of expressions frandom-seed -Common +Common Var(common_deferred_options) Defer frandom-seed= -Common Joined RejectNegative +Common Joined RejectNegative Var(common_deferred_options) Defer -frandom-seed= Make compile reproducible using ; This switch causes the command line that was used to create an @@ -1007,7 +1616,7 @@ Common Report Var(flag_record_gcc_switches) Record gcc command line switches in the object file. freg-struct-return -Common Report Var(flag_pcc_struct_return,0) VarExists Optimization +Common Report Var(flag_pcc_struct_return,0) Optimization Return small aggregates in registers fregmove @@ -1031,15 +1640,15 @@ Common Report Var(flag_reorder_functions) Optimization Reorder functions to improve code placement frerun-cse-after-loop -Common Report Var(flag_rerun_cse_after_loop) Init(2) Optimization +Common Report Var(flag_rerun_cse_after_loop) Optimization Add a common subexpression elimination pass after loop optimizations frerun-loop-opt -Common +Common Ignore Does nothing. Preserved for backward compatibility. frounding-math -Common Report Var(flag_rounding_math) Optimization +Common Report Var(flag_rounding_math) Optimization SetByCombined Disable optimizations that assume default FP rounding behavior fsched-interblock @@ -1063,7 +1672,7 @@ Common Report Var(flag_schedule_speculative_load_dangerous) Optimization Allow speculative motion of more loads fsched-verbose= -Common RejectNegative Joined +Common RejectNegative Joined UInteger Var(sched_verbose_param) -fsched-verbose= Set the verbosity level of the scheduler fsched2-use-superblocks @@ -1071,7 +1680,7 @@ Common Report Var(flag_sched2_use_superblocks) Optimization If scheduling post reload, do superblock scheduling fsched2-use-traces -Common +Common Ignore Does nothing. Preserved for backward compatibility. fschedule-insns @@ -1156,7 +1765,7 @@ Common Report Var(flag_section_anchors) Optimization Access data in the same section from shared anchor points fsee -Common +Common Ignore Does nothing. Preserved for backward compatibility. fzee @@ -1167,12 +1776,17 @@ fshow-column Common Report Var(flag_show_column) Init(1) Show column numbers in diagnostics, when available. Default on +fshrink-wrap +Common Report Var(flag_shrink_wrap) Optimization +Emit function prologues only before parts of the function that need it, +rather than at the top of the function. + fsignaling-nans -Common Report Var(flag_signaling_nans) Optimization +Common Report Var(flag_signaling_nans) Optimization SetByCombined Disable optimizations observable by IEEE signaling NaNs fsigned-zeros -Common Report Var(flag_signed_zeros) Init(1) Optimization +Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined Disable floating point optimizations that ignore the IEEE signedness of zero fsingle-precision-constant @@ -1183,6 +1797,10 @@ fsplit-ivs-in-unroller Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization Split lifetimes of induction variables when loops are unrolled +fsplit-stack +Common Report Var(flag_split_stack) Init(-1) +Generate discontiguous stack frames + fsplit-wide-types Common Report Var(flag_split_wide_types) Optimization Split wide types into independent registers @@ -1196,18 +1814,18 @@ Common Report RejectNegative Joined -fstack-check=[no|generic|specific] Insert stack checking code into the program fstack-check -Common Report +Common Alias(fstack-check=, specific, no) Insert stack checking code into the program. Same as -fstack-check=specific fstack-limit -Common +Common Var(common_deferred_options) Defer fstack-limit-register= -Common RejectNegative Joined +Common RejectNegative Joined Var(common_deferred_options) Defer -fstack-limit-register= Trap if the stack goes past fstack-limit-symbol= -Common RejectNegative Joined +Common RejectNegative Joined Var(common_deferred_options) Defer -fstack-limit-symbol= Trap if the stack goes past symbol fstack-protector @@ -1215,11 +1833,15 @@ 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 +Common Report RejectNegative Var(flag_stack_protect, 2) Use a stack protection method for every function +fstack-usage +Common RejectNegative Var(flag_stack_usage) +Output stack usage information on a per-function basis + fstrength-reduce -Common +Common Ignore Does nothing. Preserved for backward compatibility. ; Nonzero if we should do (language-dependent) alias analysis. @@ -1251,9 +1873,24 @@ Common Report Var(time_report) Report the time taken by each compiler pass ftls-model= -Common Joined RejectNegative +Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model +Enum +Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) + +EnumValue +Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) + +EnumValue +Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) + +EnumValue +Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) + +EnumValue +Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) + ftoplevel-reorder Common Report Var(flag_toplevel_reorder) Init(2) Optimization Reorder top level functions, variables, and asms @@ -1266,7 +1903,7 @@ Perform superblock formation via tail duplication ; (user-visible) trap. This is the case, for example, in nonstop ; IEEE 754 arithmetic. ftrapping-math -Common Report Var(flag_trapping_math) Init(1) Optimization +Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined Assume floating-point operations can trap ftrapv @@ -1277,8 +1914,12 @@ ftree-ccp Common Report Var(flag_tree_ccp) Optimization Enable SSA-CCP optimization on trees +ftree-bit-ccp +Common Report Var(flag_tree_bit_ccp) Optimization +Enable SSA-BIT-CCP optimization on trees + ftree-store-ccp -Common +Common Ignore Does nothing. Preserved for backward compatibility. ftree-ch @@ -1294,7 +1935,7 @@ Common Report Var(flag_tree_copy_prop) Optimization Enable copy propagation on trees ftree-store-copy-prop -Common +Common Ignore Does nothing. Preserved for backward compatibility. ftree-cselim @@ -1313,6 +1954,10 @@ ftree-dominator-opts Common Report Var(flag_tree_dom) Optimization Enable dominator optimizations +ftree-tail-merge +Common Report Var(flag_tree_tail_merge) Optimization +Enable tail merging on trees + ftree-dse Common Report Var(flag_tree_dse) Optimization Enable dead store elimination @@ -1325,17 +1970,25 @@ ftree-fre Common Report Var(flag_tree_fre) Optimization Enable Full Redundancy Elimination (FRE) on trees +foptimize-strlen +Common Report Var(flag_optimize_strlen) Optimization +Enable string length optimizations on trees + ftree-loop-distribution Common Report Var(flag_tree_loop_distribution) Optimization Enable loop distribution on trees +ftree-loop-distribute-patterns +Common Report Var(flag_tree_loop_distribute_patterns) Optimization +Enable loop distribution for patterns transformed into a library call + ftree-loop-im Common Report Var(flag_tree_loop_im) Init(1) Optimization Enable loop invariant motion on trees ftree-loop-linear -Common Report Var(flag_tree_loop_linear) Optimization -Enable linear loop transforms on trees +Common Alias(floop-interchange) +Enable loop interchange transforms. Same as -floop-interchange ftree-loop-ivcanon Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization @@ -1366,7 +2019,7 @@ Common Report Var(flag_tree_reassoc) Init(1) Optimization Enable reassociation on tree level ftree-salias -Common +Common Ignore Does nothing. Preserved for backward compatibility. ftree-sink @@ -1378,7 +2031,7 @@ Common Report Var(flag_tree_sra) Optimization Perform scalar replacement of aggregates ftree-ter -Common Report Var(flag_tree_ter) Init(1) Optimization +Common Report Var(flag_tree_ter) Optimization Replace temporary expressions in the SSA->normal pass ftree-lrs @@ -1409,12 +2062,12 @@ Common Report Var(flag_unsafe_loop_optimizations) Optimization Allow loop optimizations to assume that the loops behave in normal way fassociative-math -Common Report Var(flag_associative_math) +Common Report Var(flag_associative_math) SetByCombined Allow optimization for floating-point arithmetic which may change the result of the operation due to rounding. freciprocal-math -Common Report Var(flag_reciprocal_math) +Common Report Var(flag_reciprocal_math) SetByCombined Same as -fassociative-math for expressions which include division. ; Nonzero means that unsafe floating-point math optimizations are allowed @@ -1422,7 +2075,7 @@ Same as -fassociative-math for expressions which include division. ; are allowed to assume that their arguments and results are "normal" ; (e.g., nonnegative for SQRT). funsafe-math-optimizations -Common Report Var(flag_unsafe_math_optimizations) Optimization +Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined Allow math optimizations that may violate IEEE or ISO standards funswitch-loops @@ -1436,16 +2089,27 @@ Just generate unwind tables for exception handling fuse-linker-plugin Common Undocumented +; Positive if we should track variables, negative if we should run +; the var-tracking pass only to discard debug annotations, zero if +; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it +; will be set according to optimize, debug_info_level and debug_hooks +; in process_options (). fvar-tracking -Common Report Var(flag_var_tracking) VarExists Optimization +Common Report Var(flag_var_tracking) Init(2) Optimization Perform variable tracking +; Positive if we should track variables at assignments, negative if +; we should run the var-tracking pass only to discard debug +; annotations. When flag_var_tracking_assignments == +; AUTODETECT_VALUE it will be set according to flag_var_tracking. fvar-tracking-assignments -Common Report Var(flag_var_tracking_assignments) VarExists Optimization +Common Report Var(flag_var_tracking_assignments) Init(2) Optimization Perform variable tracking by annotating assignments +; Nonzero if we should toggle flag_var_tracking_assignments after +; processing options and computing its default. */ fvar-tracking-assignments-toggle -Common Report Var(flag_var_tracking_assignments_toggle) VarExists Optimization +Common Report Var(flag_var_tracking_assignments_toggle) Optimization Toggle -fvar-tracking-assignments fvar-tracking-uninit @@ -1469,7 +2133,7 @@ Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization Enable loop versioning when doing loop vectorization on trees ftree-vectorizer-verbose= -Common RejectNegative Joined +Common RejectNegative Joined UInteger -ftree-vectorizer-verbose= Set the verbosity level of the vectorizer ftree-scev-cprop @@ -1487,9 +2151,23 @@ Common Report Var(flag_verbose_asm) Add extra commentary to assembler output fvisibility= -Common Joined RejectNegative +Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility +Enum +Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) + +EnumValue +Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) + +EnumValue +Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) + +EnumValue +Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) + +EnumValue +Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) fvpt Common Report Var(flag_value_profile_transformations) Optimization @@ -1499,14 +2177,6 @@ fweb Common Report Var(flag_web) Init(2) Optimization Construct webs and split unrelated uses of single variable -fwhopr -Common -Enable partitioned link-time optimization - -fwhopr= -Common RejectNegative UInteger Joined Var(flag_whopr) -Enable partitioned link-time optimization with specified number of parallel jobs - ftree-builtin-call-dce Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization Enable conditional dead code elimination for builtin calls @@ -1539,6 +2209,14 @@ ggdb Common JoinedOrMissing Generate debug information in default extended format +gno-record-gcc-switches +Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(0) +Don't record gcc command line switches in DWARF DW_AT_producer. + +grecord-gcc-switches +Common RejectNegative Var(dwarf_record_gcc_switches,1) +Record gcc command line switches in DWARF DW_AT_producer. + gstabs Common JoinedOrMissing Negative(gstabs+) Generate debug information in STABS format @@ -1552,7 +2230,7 @@ Common RejectNegative Var(dwarf_strict,0) Init(-1) Emit DWARF additions beyond selected version gstrict-dwarf -Common Report RejectNegative Var(dwarf_strict,1) VarExists +Common Report RejectNegative Var(dwarf_strict,1) Don't emit DWARF additions beyond selected version gtoggle @@ -1571,44 +2249,171 @@ gxcoff+ Common JoinedOrMissing Negative(gcoff) Generate debug information in extended XCOFF format +h +Driver Joined Separate + iplugindir= Common Joined Var(plugindir_string) Init(0) -iplugindir= Set to be the default plugin directory +l +Driver Joined Separate + +n +Driver + +no-canonical-prefixes +Driver + +nodefaultlibs +Driver + +nostartfiles +Driver + +nostdlib +Driver + o -Common Joined Separate +Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) -o Place output into p Common Var(profile_flag) Enable function profiling +pass-exit-codes +Driver Var(pass_exit_codes) + pedantic Common Var(pedantic) Issue warnings needed for strict compliance to the standard pedantic-errors -Common +Common Var(flag_pedantic_errors) Like -pedantic but issue them as errors +pg +Driver + +pipe +Driver Var(use_pipes) + +print-file-name= +Driver JoinedOrMissing Var(print_file_name) + +print-libgcc-file-name +Driver + +print-multi-directory +Driver Var(print_multi_directory) + +print-multi-lib +Driver Var(print_multi_lib) + +print-multi-os-directory +Driver Var(print_multi_os_directory) + +print-prog-name= +Driver JoinedOrMissing Var(print_prog_name) + +print-search-dirs +Driver Var(print_search_dirs) + +print-sysroot +Driver Var(print_sysroot) + +print-sysroot-headers-suffix +Driver Var(print_sysroot_headers_suffix) + quiet -Common Var(quiet_flag) +Common Var(quiet_flag) RejectDriver Do not display functions compiled or elapsed time +r +Driver + +s +Driver + +save-temps +Driver + +save-temps= +Driver Joined + +t +Driver + +time +Driver Var(report_times) + +time= +Driver JoinedOrMissing + +u +Driver Joined Separate + +undef +Driver +; C option, but driver must not handle as "-u ndef". + +v +Common Driver Var(verbose_flag) +Enable verbose output + version -Common Var(version_flag) +Common Var(version_flag) RejectDriver Display the compiler's version w Common Var(inhibit_warnings) Suppress warnings +wrapper +Driver Separate Var(wrapper_string) + +x +Driver Joined Separate + shared Common RejectNegative Negative(pie) Create a shared library +shared-libgcc +Driver + +specs +Driver Separate Alias(specs=) + +specs= +Driver Joined + +static +Driver + +static-libgcc +Driver + +static-libgfortran +Driver +; Documented for Fortran, but always accepted by driver. + +static-libstdc++ +Driver + +static-libgo +Driver +; Documented for Go, but always accepted by driver. + +symbolic +Driver + pie Common RejectNegative Negative(shared) Create a position independent executable +z +Driver Joined Separate + ; This comment is to ensure we retain the blank line above.