From b9de1157289455b0ca26daff519d4a0ddcd1fa13 Mon Sep 17 00:00:00 2001 From: Dan Albert Date: Wed, 24 Feb 2016 13:48:45 -0800 Subject: Update 4.8.1 to 4.8.3. My previous drop was the wrong version. The platform mingw is currently using 4.8.3, not 4.8.1 (not sure how I got that wrong). From ftp://ftp.gnu.org/gnu/gcc/gcc-4.8.3/gcc-4.8.3.tar.bz2. Bug: http://b/26523949 Change-Id: Id85f1bdcbbaf78c7d0b5a69e74c798a08f341c35 --- gcc-4.8.3/gcc/common.opt | 2552 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2552 insertions(+) create mode 100644 gcc-4.8.3/gcc/common.opt (limited to 'gcc-4.8.3/gcc/common.opt') diff --git a/gcc-4.8.3/gcc/common.opt b/gcc-4.8.3/gcc/common.opt new file mode 100644 index 000000000..bdbd3b6cd --- /dev/null +++ b/gcc-4.8.3/gcc/common.opt @@ -0,0 +1,2552 @@ +; Options for the language- and target-independent parts of the compiler. + +; Copyright (C) 2003-2013 Free Software Foundation, Inc. +; +; This file is part of GCC. +; +; GCC is free software; you can redistribute it and/or modify it under +; the terms of the GNU General Public License as published by the Free +; Software Foundation; either version 3, or (at your option) any later +; version. +; +; GCC is distributed in the hope that it will be useful, but WITHOUT ANY +; WARRANTY; without even the implied warranty of MERCHANTABILITY or +; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +; for more details. +; +; You should have received a copy of the GNU General Public License +; along with GCC; see the file COPYING3. If not see +; . + +; See the GCC internals manual (options.texi) for a description of this file's format. + +; Please try to keep this file in ASCII collating order. + +Variable +int target_flags + +Variable +int optimize + +Variable +int optimize_size + +Variable +int optimize_debug + +; 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 + +; 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 + +; 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 Driver Var(help_flag) +Display this information + +-help= +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-sysroot-suffix +Driver Var(no_sysroot_suffix) + +-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(Wpedantic) + +-pedantic-errors +Common Alias(pedantic-errors) + +-pie +Driver 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-multiarch +Driver Alias(print-multiarch) + +-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 +Driver Alias(shared) + +-specs +Driver Separate Alias(specs=) + +-specs= +Driver Joined Alias(specs=) + +-static +Driver Alias(static) + +-symbolic +Driver Alias(symbolic) + +-target-help +Common Driver +Alias for --help=target + +-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 Driver Alias(-help) + +fhelp= +Common Driver Joined Alias(-help=) + +ftarget-help +Common Driver Alias(-target-help) + +fversion +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 Driver + +B +Driver Joined Separate + +E +Driver + +L +Driver Joined Separate + +N +Driver + +O +Common JoinedOrMissing Optimization +-O Set optimization level to + +Os +Common Optimization +Optimize for space rather than speed + +Ofast +Common Optimization +Optimize for speed disregarding exact standards compliance + +Og +Common Optimization +Optimize for debugging experience rather than speed or size + +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 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 + +Waggressive-loop-optimizations +Common Var(warn_aggressive_loop_optimizations) Init(1) Warning +Warn if a loop with constant number of iterations triggers undefined behavior + +Warray-bounds +Common Var(warn_array_bounds) Warning +Warn if an array is accessed out of bounds + +Wattributes +Common Var(warn_attributes) Init(1) Warning +Warn about inappropriate attribute usage + +Wcast-align +Common Var(warn_cast_align) Warning +Warn about pointer casts which increase alignment + +Wcpp +Common Var(warn_cpp) Init(1) Warning +Warn when a #warning directive is encountered + +Wdeprecated-declarations +Common Var(warn_deprecated_decl) Init(1) Warning +Warn about uses of __attribute__((deprecated)) declarations + +Wdisabled-optimization +Common Var(warn_disabled_optimization) Warning +Warn when an optimization pass is disabled + +Werror +Common Var(warnings_are_errors) +Treat all warnings as errors + +Werror= +Common Joined +Treat specified warning as error + +Wextra +Common Var(extra_warnings) Warning +Print extra (possibly unwanted) warnings + +Wfatal-errors +Common Var(flag_fatal_errors) +Exit on the first error occurred + +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 + +Winvalid-memory-model +Common Var(warn_invalid_memory_model) Init(1) Warning +Warn when an atomic memory model parameter is known to be outside the valid range. + +Wlarger-than- +Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) + +Wlarger-than= +Common RejectNegative Joined UInteger Warning +-Wlarger-than= Warn if an object is larger than bytes + +Wunsafe-loop-optimizations +Common Var(warn_unsafe_loop_optimizations) Warning +Warn if the loop cannot be optimized due to nontrivial assumptions. + +Wmissing-noreturn +Common Alias(Wsuggest-attribute=noreturn) + +Woverflow +Common Var(warn_overflow) Init(1) Warning +Warn about overflow in arithmetic expressions + +Wpacked +Common Var(warn_packed) Warning +Warn when the packed attribute has no effect on struct layout + +Wpadded +Common Var(warn_padded) Warning +Warn when padding is required to align structure members + +Wpedantic +Common Var(pedantic) Warning +Issue warnings needed for strict compliance to the standard + +Wshadow +Common Var(warn_shadow) Warning +Warn when one local variable shadows another + +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 + +Wstrict-aliasing= +Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning +Warn about code which might break strict aliasing rules + +Wstrict-overflow +Common Warning +Warn about optimizations that assume that signed overflow is undefined + +Wstrict-overflow= +Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning +Warn about optimizations that assume that signed overflow is undefined + +Wsuggest-attribute=const +Common Var(warn_suggest_attribute_const) Warning +Warn about functions which might be candidates for __attribute__((const)) + +Wsuggest-attribute=pure +Common Var(warn_suggest_attribute_pure) Warning +Warn about functions which might be candidates for __attribute__((pure)) + +Wsuggest-attribute=noreturn +Common Var(warn_suggest_attribute_noreturn) Warning +Warn about functions which might be candidates for __attribute__((noreturn)) + +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) Warning EnabledBy(Wextra) +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 EnabledBy(Wextra) +Warn about uninitialized automatic variables + +Wmaybe-uninitialized +Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized) +Warn about maybe uninitialized automatic variables + +Wunreachable-code +Common Ignore +Does nothing. Preserved for backward compatibility. + +Wunused +Common Var(warn_unused) Init(0) Warning +Enable all -Wunused- warnings + +Wunused-but-set-parameter +Common Var(warn_unused_but_set_parameter) Warning EnabledBy(Wunused && Wextra) +Warn when a function parameter is only set, otherwise unused + +Wunused-but-set-variable +Common Var(warn_unused_but_set_variable) Warning EnabledBy(Wunused) +Warn when a variable is only set, otherwise unused + +Wunused-function +Common Var(warn_unused_function) Warning EnabledBy(Wunused) +Warn when a function is unused + +Wunused-label +Common Var(warn_unused_label) Warning EnabledBy(Wunused) +Warn when a label is unused + +Wunused-parameter +Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra) +Warn when a function parameter is unused + +Wunused-value +Common Var(warn_unused_value) Warning EnabledBy(Wunused) +Warn when an expression value is unused + +Wunused-variable +Common Var(warn_unused_variable) Warning EnabledBy(Wunused) +Warn when a variable is unused + +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 Var(aux_info_file_name) +-aux-info Emit declaration information into + +aux-info= +Common Joined Alias(aux-info) + +auxbase +Common Separate RejectDriver Var(aux_base_name) + +auxbase-strip +Common Separate RejectDriver + +coverage +Driver + +c +Driver + +d +Common Joined +-d Enable dumps from specific passes of the compiler + +dumpbase +Common Separate Var(dump_base_name) +-dumpbase Set the file basename to be used for dumps + +dumpdir +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 +; 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. +; +; 2: The version of the ABI first used in G++ 3.4 (and current default). +; +; 3: The version of the ABI that fixes the missing underscore +; in template non-type arguments of pointer type. +; +; 4: The version of the ABI that introduces unambiguous mangling of +; 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 and +; changes the mangling of template argument packs, const/static_cast, +; prefix ++ and --, and a class scope function used as a template +; argument. +; First selectable in G++ 4.7. +; +; 7: The version of the ABI that treats nullptr_t as a builtin type and +; corrects the mangling of lambdas in default argument scope. +; First selectable in G++ 4.8. +; Additional positive integers will be assigned as new versions of +; the ABI become the default version of the ABI. +fabi-version= +Common Joined RejectNegative UInteger Var(flag_abi_version) Init(2) + +faggressive-loop-optimizations +Common Report Var(flag_aggressive_loop_optimizations) Optimization Init(1) +Aggressively optimize loops using language constraints + +falign-functions +Common Report Var(align_functions,0) Optimization UInteger +Align the start of functions + +falign-functions= +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 Var(align_jumps) + +falign-labels +Common Report Var(align_labels,0) Optimization UInteger +Align all labels + +falign-labels= +Common RejectNegative Joined UInteger Var(align_labels) + +falign-loops +Common Report Var(align_loops,0) Optimization UInteger +Align the start of loops + +falign-loops= +Common RejectNegative Joined UInteger Var(align_loops) + +fargument-alias +Common Ignore +Does nothing. Preserved for backward compatibility. + +fargument-noalias +Common Ignore +Does nothing. Preserved for backward compatibility. + +fargument-noalias-global +Common Ignore +Does nothing. Preserved for backward compatibility. + +fargument-noalias-anything +Common Ignore +Does nothing. Preserved for backward compatibility. + +fsanitize=address +Common Report Var(flag_asan) +Enable AddressSanitizer, a memory error detector + +fsanitize=thread +Common Report Var(flag_tsan) +Enable ThreadSanitizer, a data race detector + +fasynchronous-unwind-tables +Common Report Var(flag_asynchronous_unwind_tables) Optimization +Generate unwind tables that are exact at each instruction boundary + +fauto-inc-dec +Common Report Var(flag_auto_inc_dec) Init(1) +Generate auto-inc/dec instructions + +; -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 Report Var(flag_bounds_check) +Generate code to check bounds before indexing arrays + +fbranch-count-reg +Common Report Var(flag_branch_on_count_reg) Init(1) Optimization +Replace add, compare, branch with branch on count register + +fbranch-probabilities +Common Report Var(flag_branch_probabilities) Optimization +Use profiling information for branch probabilities + +fbranch-target-load-optimize +Common Report Var(flag_branch_target_load_optimize) Optimization +Perform branch target load optimization before prologue / epilogue threading + +fbranch-target-load-optimize2 +Common Report Var(flag_branch_target_load_optimize2) Optimization +Perform branch target load optimization after prologue / epilogue threading + +fbtr-bb-exclusive +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 Var(common_deferred_options) Defer +-fcall-saved- Mark as being preserved across functions + +fcall-used- +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 +; be saved across function calls, if that produces overall better code. +; Optional now, so people can test it. +fcaller-saves +Common Report Var(flag_caller_saves) Optimization +Save registers around function calls + +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 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 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 + +fcprop-registers +Common Report Var(flag_cprop_registers) Optimization +Perform a register copy-propagation optimization pass + +fcrossjumping +Common Report Var(flag_crossjumping) Optimization +Perform cross-jumping optimization + +fcse-follow-jumps +Common Report Var(flag_cse_follow_jumps) Optimization +When running CSE, follow jumps to their targets + +fcse-skip-blocks +Common Ignore +Does nothing. Preserved for backward compatibility. + +fcx-limited-range +Common Report Var(flag_cx_limited_range) Optimization SetByCombined +Omit range reduction step when performing complex division + +fcx-fortran-rules +Common Report Var(flag_cx_fortran_rules) Optimization +Complex multiplication and division follow Fortran rules + +fdata-sections +Common Report Var(flag_data_sections) Optimization +Place data items into their own section + +fdbg-cnt-list +Common Report Var(common_deferred_options) Defer +List all available debugging counters with their limits and counts. + +fdbg-cnt= +Common RejectNegative Joined Var(common_deferred_options) Defer +-fdbg-cnt=:[,:,...] Set the debug counter limit. + +fdebug-prefix-map= +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(0) +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 +Common Report Var(flag_defer_pop) Optimization +Defer popping functions args from stack until later + +fdelayed-branch +Common Report Var(flag_delayed_branch) Optimization +Attempt to fill delay slots of branch instructions + +fdelete-dead-exceptions +Common Report Var(flag_delete_dead_exceptions) Init(0) +Delete dead instructions that may throw exceptions + +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 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-caret +Common Var(flag_diagnostics_show_caret) Init(1) +Show the source line with a caret indicating the column + +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 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) +Suppress output of instruction numbers, line number notes and addresses in debugging dumps + +fdump-unnumbered-links +Common Report Var(flag_dump_unnumbered_links) +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 + +feliminate-dwarf2-dups +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 + +feliminate-unused-debug-types +Common Report Var(flag_eliminate_unused_debug_types) Init(1) +Perform unused type elimination in debug info + +femit-class-debug-always +Common Report Var(flag_emit_class_debug_always) Init(0) +Do not suppress C++ class debug information. + +fexceptions +Common Report Var(flag_exceptions) Optimization +Enable exception handling + +fexpensive-optimizations +Common Report Var(flag_expensive_optimizations) Optimization +Perform a number of minor, expensive optimizations + +fexcess-precision= +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 SetByCombined +Assume no NaNs or infinities are generated + +ffixed- +Common Joined RejectNegative Var(common_deferred_options) Defer +-ffixed- Mark as being unavailable to the compiler + +ffloat-store +Common Report Var(flag_float_store) Optimization +Don't allocate floats and doubles in extended-precision registers + +fforce-addr +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. +ffunction-cse +Common Report Var(flag_no_function_cse,0) +Allow function addresses to be held in registers + +ffunction-sections +Common Report Var(flag_function_sections) +Place each function into its own section + +fgcse +Common Report Var(flag_gcse) Optimization +Perform global common subexpression elimination + +fgcse-lm +Common Report Var(flag_gcse_lm) Init(1) Optimization +Perform enhanced load motion during global common subexpression elimination + +fgcse-sm +Common Report Var(flag_gcse_sm) Init(0) Optimization +Perform store motion after global common subexpression elimination + +fgcse-las +Common Report Var(flag_gcse_las) Init(0) Optimization +Perform redundant load after store elimination in global common subexpression +elimination + +fgcse-after-reload +Common Report Var(flag_gcse_after_reload) Optimization +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 + +fhoist-adjacent-loads +Common Report Var(flag_hoist_adjacent_loads) Optimization +Enable hoisting adjacent loads to encourage generating conditional move +instructions + +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 + +fgnu-tm +Common Report Var(flag_tm) +Enable support for GNU transactional memory + +floop-flatten +Common Ignore +Does nothing. Preserved for backward compatibility. + +floop-nest-optimize +Common Report Var(flag_loop_optimize_isl) Optimization +Enable the ISL based loop nest optimizer + +fstrict-volatile-bitfields +Common Report Var(flag_strict_volatile_bitfields) Init(-1) +Force bitfield accesses to match their type width + +fguess-branch-probability +Common Report Var(flag_guess_branch_prob) Optimization +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 Report Var(flag_no_ident,0) +Process #ident directives + +fif-conversion +Common Report Var(flag_if_conversion) Optimization +Perform conversion of conditional jumps to branchless equivalents + +fif-conversion2 +Common Report Var(flag_if_conversion2) Optimization +Perform conversion of conditional jumps to conditional execution + +fstack-reuse= +Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL) +-fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables. + +Enum +Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs) + +EnumValue +Enum(stack_reuse_level) String(all) Value(SR_ALL) + +EnumValue +Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS) + +EnumValue +Enum(stack_reuse_level) String(none) Value(SR_NONE) + +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 +; needed for crtstuff.c on other systems. +finhibit-size-directive +Common Report Var(flag_inhibit_size_directive) +Do not generate .size directives + +findirect-inlining +Common Report Var(flag_indirect_inlining) +Perform indirect inlining + +; General flag to enable inlining. Specifying -fno-inline will disable +; all inlining apart from always-inline functions. +finline +Common Report Var(flag_no_inline,0) Init(0) Optimization +Enable inlining of function declared \"inline\", disabling disables all inlining + +finline-small-functions +Common Report Var(flag_inline_small_functions) Optimization +Integrate functions into their callers when code size is known not to grow + +finline-functions +Common Report Var(flag_inline_functions) Optimization +Integrate functions not declared \"inline\" into their callers when profitable + +finline-functions-called-once +Common Report Var(flag_inline_functions_called_once) Optimization +Integrate functions only required by their single caller + +finline-limit- +Common RejectNegative Joined Alias(finline-limit=) + +finline-limit= +Common RejectNegative Joined UInteger +-finline-limit= Limit the size of inlined functions to + +finline-atomics +Common Report Var(flag_inline_atomics) Init(1) Optimization +Inline __atomic operations when a lock free instruction sequence is available. + +finstrument-functions +Common Report Var(flag_instrument_function_entry_exit) +Instrument function entry and exit with profiling calls + +finstrument-functions-exclude-function-list= +Common RejectNegative Joined +-finstrument-functions-exclude-function-list=name,... Do not instrument listed functions + +finstrument-functions-exclude-file-list= +Common RejectNegative Joined +-finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files + +fipa-cp +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-profile +Common Report Var(flag_ipa_profile) Init(0) Optimization +Perform interprocedural profile propagation + +fipa-pta +Common Report Var(flag_ipa_pta) Init(0) Optimization +Perform interprocedural points-to analysis + +fipa-pure-const +Common Report Var(flag_ipa_pure_const) Init(0) Optimization +Discover pure and const functions + +fipa-reference +Common Report Var(flag_ipa_reference) Init(0) Optimization +Discover readonly and non addressable static variables + +fipa-matrix-reorg +Common Ignore +Does nothing. Preserved for backward compatibility. + +fipa-struct-reorg +Common Ignore +Does nothing. Preserved for backward compatibility. + +fira-algorithm= +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 Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) +-fira-region=[one|all|mixed] Set regions for IRA + +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-hoist-pressure +Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization +Use IRA based register pressure calculation +in RTL hoist optimizations. + +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 Var(flag_ira_verbose) Init(5) +-fira-verbose= Control IRA's level of diagnostic messages. + +fivopts +Common Report Var(flag_ivopts) Init(1) Optimization +Optimize induction variables on trees + +fjump-tables +Common Var(flag_jump_tables) Init(1) Optimization +Use jump tables for sufficiently large switch statements + +fkeep-inline-functions +Common Report Var(flag_keep_inline_functions) +Generate code for functions even if they are fully inlined + +fkeep-static-consts +Common Report Var(flag_keep_static_consts) Init(1) +Emit static const variables even if they are not used + +fleading-underscore +Common Report Var(flag_leading_underscore) Init(-1) +Give external symbols a leading underscore + +floop-optimize +Common Ignore +Does nothing. Preserved for backward compatibility. + +flto +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 symbols 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=max +Common Var(flag_lto_partition_max) +Put every symbol into separate partition + +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) +-flto-compression-level= Use zlib compression level for IL + +flto-report +Common Report Var(flag_lto_report) Init(0) +Report various link-time optimization statistics + +fmath-errno +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 + +fmem-report-wpa +Common Report Var(mem_report_wpa) +Report on permanent memory allocation in WPA only + +; 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 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) Optimization +Attempt to merge identical constants across compilation units + +fmerge-debug-strings +Common Report Var(flag_merge_debug_strings) Init(1) +Attempt to merge identical debug strings across compilation units + +fmessage-length= +Common RejectNegative Joined UInteger +-fmessage-length= Limit diagnostics to characters per line. 0 suppresses line-wrapping + +fmodulo-sched +Common Report Var(flag_modulo_sched) Optimization +Perform SMS based modulo scheduling before the first scheduling pass + +fmodulo-sched-allow-regmoves +Common Report Var(flag_modulo_sched_allow_regmoves) +Perform SMS based modulo scheduling with register moves allowed + +fmove-loop-invariants +Common Report Var(flag_move_loop_invariants) Init(1) Optimization +Move loop invariant computations out of loops + +fdce +Common Var(flag_dce) Init(1) Optimization +Use the RTL dead code elimination pass + +fdse +Common Var(flag_dse) Init(1) Optimization +Use the RTL dead store elimination pass + +freschedule-modulo-scheduled-loops +Common Report Var(flag_resched_modulo_sched) Optimization +Enable/Disable the traditional scheduling in loops that already passed modulo scheduling + +fnon-call-exceptions +Common Report Var(flag_non_call_exceptions) Optimization +Support synchronous non-call exceptions + +fomit-frame-pointer +Common Report Var(flag_omit_frame_pointer) Optimization +When possible do not generate stack frames + +fopt-info +Common Report Var(flag_opt_info) Optimization +Enable all optimization info dumps on stderr + +fopt-info- +Common Joined RejectNegative Var(common_deferred_options) Defer +-fopt-info[-=filename] Dump compiler optimization details + +foptimize-register-move +Common Report Var(flag_regmove) Optimization +Do the full register move optimization pass + +foptimize-sibling-calls +Common Report Var(flag_optimize_sibling_calls) Optimization +Optimize sibling and tail recursive calls + +fpartial-inlining +Common Report Var(flag_partial_inlining) +Perform partial inlining + +fpre-ipa-mem-report +Common Report Var(pre_ipa_mem_report) +Report on memory allocation before interprocedural optimization + +fpost-ipa-mem-report +Common Report Var(post_ipa_mem_report) +Report on memory allocation before interprocedural optimization + +fpack-struct +Common Report Var(flag_pack_struct) Optimization +Pack structure members together without holes + +fpack-struct= +Common RejectNegative Joined UInteger Optimization +-fpack-struct= Set initial maximum structure member alignment + +fpcc-struct-return +Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) +Return small aggregates in memory, not registers + +fpeel-loops +Common Report Var(flag_peel_loops) Optimization +Perform loop peeling + +fpeephole +Common Report Var(flag_no_peephole,0) Optimization +Enable machine specific peephole optimizations + +fpeephole2 +Common Report Var(flag_peephole2) Optimization +Enable an RTL peephole pass before sched2 + +fPIC +Common Report Var(flag_pic,2) Negative(fPIE) +Generate position-independent code if possible (large mode) + +fPIE +Common Report Var(flag_pie,2) Negative(fpic) +Generate position-independent code for executables if possible (large mode) + +fpic +Common Report Var(flag_pic,1) Negative(fpie) +Generate position-independent code if possible (small mode) + +fpie +Common Report Var(flag_pie,1) Negative(fPIC) +Generate position-independent code for executables if possible (small mode) + +fplugin= +Common Joined RejectNegative Var(common_deferred_options) Defer +Specify a plugin to load + +fplugin-arg- +Common Joined RejectNegative Var(common_deferred_options) Defer +-fplugin-arg--[=] Specify argument = for plugin + +fpredictive-commoning +Common Report Var(flag_predictive_commoning) Optimization +Run predictive commoning optimization. + +fprefetch-loop-arrays +Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization +Generate prefetch instructions, if available, for arrays in loops + +fprofile +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-dir= +Common Joined RejectNegative Var(profile_data_prefix) +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 + +fprofile-generate= +Common Joined RejectNegative +Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= + +fprofile-use +Common Var(flag_profile_use) +Enable common options for performing profile feedback directed optimizations + +fprofile-use= +Common Joined RejectNegative +Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= + +fprofile-values +Common Report Var(flag_profile_values) +Insert code to profile values of expressions + +fprofile-report +Common Report Var(profile_report) +Report on consistency of profile + +frandom-seed +Common Var(common_deferred_options) Defer + +frandom-seed= +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 +; object file to be recorded into the object file. The exact format +; of this recording is target and binary file format dependent. +; It is related to the -fverbose-asm switch, but that switch only +; records information in the assembler output file as comments, so +; they never reach the object file. +frecord-gcc-switches +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) Optimization +Return small aggregates in registers + +fregmove +Common Report Var(flag_regmove) Optimization +Enables a register move optimization + +frename-registers +Common Report Var(flag_rename_registers) Init(2) Optimization +Perform a register renaming optimization pass + +freorder-blocks +Common Report Var(flag_reorder_blocks) Optimization +Reorder basic blocks to improve code placement + +freorder-blocks-and-partition +Common Report Var(flag_reorder_blocks_and_partition) Optimization +Reorder basic blocks and partition into hot and cold sections + +freorder-functions +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) Optimization +Add a common subexpression elimination pass after loop optimizations + +frerun-loop-opt +Common Ignore +Does nothing. Preserved for backward compatibility. + +frounding-math +Common Report Var(flag_rounding_math) Optimization SetByCombined +Disable optimizations that assume default FP rounding behavior + +fsched-interblock +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 + +fsched-spec-load +Common Report Var(flag_schedule_speculative_load) Optimization +Allow speculative motion of some loads + +fsched-spec-load-dangerous +Common Report Var(flag_schedule_speculative_load_dangerous) Optimization +Allow speculative motion of more loads + +fsched-verbose= +Common RejectNegative Joined UInteger Var(sched_verbose_param) +-fsched-verbose= Set the verbosity level of the scheduler + +fsched2-use-superblocks +Common Report Var(flag_sched2_use_superblocks) Optimization +If scheduling post reload, do superblock scheduling + +fsched2-use-traces +Common Ignore +Does nothing. Preserved for backward compatibility. + +fschedule-insns +Common Report Var(flag_schedule_insns) Optimization +Reschedule instructions before register allocation + +fschedule-insns2 +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 Report Var(flag_sched_stalled_insns) Optimization UInteger +Allow premature scheduling of queued insns + +fsched-stalled-insns= +Common RejectNegative Joined UInteger +-fsched-stalled-insns= 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) Optimization UInteger +Set dependence distance checking in premature scheduling of queued insns + +fsched-stalled-insns-dep= +Common RejectNegative Joined UInteger +-fsched-stalled-insns-dep= 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 + +fsee +Common Ignore +Does nothing. Preserved for backward compatibility. + +fzee +Common Ignore +Does nothing. Preserved for backward compatibility. + +free +Common Report Var(flag_ree) Init(0) +Turn on Redundant Extensions Elimination pass. + +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 SetByCombined +Disable optimizations observable by IEEE signaling NaNs + +fsigned-zeros +Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined +Disable floating point optimizations that ignore the IEEE signedness of zero + +fsingle-precision-constant +Common Report Var(flag_single_precision_constant) Optimization +Convert floating point constants to single precision constants + +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 + +fvariable-expansion-in-unroller +Common Report Var(flag_variable_expansion_in_unroller) Optimization +Apply variable expansion when loops are unrolled + +fstack-check= +Common Report RejectNegative Joined +-fstack-check=[no|generic|specific] Insert stack checking code into the program + +fstack-check +Common Alias(fstack-check=, specific, no) +Insert stack checking code into the program. Same as -fstack-check=specific + +fstack-limit +Common Var(common_deferred_options) Defer + +fstack-limit-register= +Common RejectNegative Joined Var(common_deferred_options) Defer +-fstack-limit-register= Trap if the stack goes past + +fstack-limit-symbol= +Common RejectNegative Joined Var(common_deferred_options) Defer +-fstack-limit-symbol= Trap if the stack goes past symbol + +fstack-protector +Common Report Var(flag_stack_protect, 1) +Use propolice as a stack protection method + +fstack-protector-all +Common Report RejectNegative Var(flag_stack_protect, 2) +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 Ignore +Does nothing. Preserved for backward compatibility. + +; Nonzero if we should do (language-dependent) alias analysis. +; Typically, this analysis will assume that expressions of certain +; types do not alias expressions of certain other types. Only used +; if alias analysis (in general) is enabled. +fstrict-aliasing +Common Report Var(flag_strict_aliasing) Optimization +Assume strict aliasing rules apply + +fstrict-overflow +Common Report Var(flag_strict_overflow) +Treat signed overflow as undefined + +fsync-libcalls +Common Report Var(flag_sync_libcalls) Init(1) +Implement __atomic operations via libcalls to legacy __sync functions + +fsyntax-only +Common Report Var(flag_syntax_only) +Check for syntax errors, then stop + +ftest-coverage +Common Report Var(flag_test_coverage) +Create data files needed by \"gcov\" + +fthread-jumps +Common Report Var(flag_thread_jumps) Optimization +Perform jump threading optimizations + +ftime-report +Common Report Var(time_report) +Report the time taken by each compiler pass + +ftls-model= +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 + +ftracer +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 Report Var(flag_trapping_math) Init(1) Optimization SetByCombined +Assume floating-point operations can trap + +ftrapv +Common Report Var(flag_trapv) Optimization +Trap for signed overflow in addition, subtraction and multiplication + +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 Ignore +Does nothing. Preserved for backward compatibility. + +ftree-ch +Common Report Var(flag_tree_ch) Optimization +Enable loop header copying on trees + +ftree-coalesce-inlined-vars +Common Report Var(flag_ssa_coalesce_vars,1) Init(2) RejectNegative Optimization +Enable coalescing of copy-related user variables that are inlined + +ftree-coalesce-vars +Common Report Var(flag_ssa_coalesce_vars,2) Optimization +Enable coalescing of all copy-related user variables + +ftree-copyrename +Common Report Var(flag_tree_copyrename) Optimization +Replace SSA temporaries with better names in copies + +ftree-copy-prop +Common Report Var(flag_tree_copy_prop) Optimization +Enable copy propagation on trees + +ftree-store-copy-prop +Common Ignore +Does nothing. Preserved for backward compatibility. + +ftree-cselim +Common Report Var(flag_tree_cselim) Init(2) Optimization +Transform condition stores into unconditional ones + +ftree-switch-conversion +Common Report Var(flag_tree_switch_conversion) Optimization +Perform conversions of switch initializations. + +ftree-dce +Common Report Var(flag_tree_dce) Optimization +Enable SSA dead code elimination optimization on trees + +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 + +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 + +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 Alias(floop-interchange) +Enable loop interchange transforms. Same as -floop-interchange + +ftree-loop-ivcanon +Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization +Create canonical induction variables in loops + +ftree-loop-optimize +Common Report Var(flag_tree_loop_optimize) Init(1) Optimization +Enable loop optimizations on tree level + +ftree-parallelize-loops= +Common Report Joined RejectNegative 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-partial-pre +Common Report Var(flag_tree_partial_pre) Optimization +In SSA-PRE optimization on trees, enable partial-partial redundancy elimination + +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 + +ftree-salias +Common Ignore +Does nothing. Preserved for backward compatibility. + +ftree-sink +Common Report Var(flag_tree_sink) Optimization +Enable SSA code sinking on trees + +ftree-slsr +Common Report Var(flag_tree_slsr) Optimization +Perform straight-line strength reduction + +ftree-sra +Common Report Var(flag_tree_sra) Optimization +Perform scalar replacement of aggregates + +ftree-ter +Common Report Var(flag_tree_ter) Optimization +Replace temporary expressions in the SSA->normal pass + +ftree-lrs +Common Report Var(flag_tree_live_range_split) Optimization +Perform live range splitting during the SSA->normal pass + +ftree-vrp +Common Report Var(flag_tree_vrp) Init(0) Optimization +Perform Value Range Propagation on trees + +funit-at-a-time +Common Report Var(flag_unit_at_a_time) Init(1) Optimization +Compile whole compilation unit at a time + +funroll-loops +Common Report Var(flag_unroll_loops) Optimization +Perform loop unrolling when iteration count is known + +funroll-all-loops +Common Report Var(flag_unroll_all_loops) Optimization +Perform loop unrolling for all loops + +; Nonzero means that loop optimizer may assume that the induction variables +; that control loops do not overflow and that the loops with nontrivial +; exit condition are not infinite +funsafe-loop-optimizations +Common Report Var(flag_unsafe_loop_optimizations) Optimization +Allow loop optimizations to assume that the loops behave in normal way + +fassociative-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) SetByCombined +Same as -fassociative-math for expressions which include division. + +; 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 Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined +Allow math optimizations that may violate IEEE or ISO standards + +funswitch-loops +Common Report Var(flag_unswitch_loops) Optimization +Perform loop unswitching + +funwind-tables +Common Report Var(flag_unwind_tables) Optimization +Just generate unwind tables for exception handling + +fuse-ld=bfd +Common Negative(fuse-ld=gold) +Use the bfd linker instead of the default linker + +fuse-ld=gold +Common Negative(fuse-ld=bfd) +Use the gold linker instead of the default linker + +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) 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) 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) Optimization +Toggle -fvar-tracking-assignments + +; Positive if we should track uninitialized variables, negative if +; we should run the var-tracking pass only to discard debug +; annotations. When flag_var_tracking_uninit == AUTODETECT_VALUE it +; will be set according to flag_var_tracking. +fvar-tracking-uninit +Common Report Var(flag_var_tracking_uninit) Optimization +Perform variable tracking and also tag variables that are uninitialized + +ftree-vectorize +Common Report Var(flag_tree_vectorize) Optimization +Enable loop vectorization on trees + +ftree-vectorizer-verbose= +Common RejectNegative Joined UInteger Var(common_deferred_options) Defer +-ftree-vectorizer-verbose= This switch is deprecated. Use -fopt-info instead. + +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 + +ftree-vect-loop-version +Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization +Enable loop versioning when doing loop vectorization on trees + +ftree-scev-cprop +Common Report Var(flag_tree_scev_cprop) Init(1) Optimization +Enable copy propagation of scalar-evolution information. + +; -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 Report Var(flag_verbose_asm) +Add extra commentary to assembler output + +fvisibility= +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 +Use expression value profiles in optimizations + +fweb +Common Report Var(flag_web) Init(2) Optimization +Construct webs and split unrelated uses of single variable + +ftree-builtin-call-dce +Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization +Enable conditional dead code elimination for builtin calls + +fwhole-program +Common Report Var(flag_whole_program) Init(0) Optimization +Perform whole program optimizations + +fwrapv +Common Report Var(flag_wrapv) Optimization +Assume signed arithmetic overflow wraps around + +fzero-initialized-in-bss +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 Negative(gdwarf-) +Generate debug information in COFF format + +gdwarf- +Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs) +Generate debug information in DWARF v2 (or later) format + +ggdb +Common JoinedOrMissing +Generate debug information in default extended format + +gno-pubnames +Common RejectNegative Var(debug_generate_pub_sections, 0) Init(-1) +Don't generate DWARF pubnames and pubtypes sections. + +gpubnames +Common RejectNegative Var(debug_generate_pub_sections, 1) +Generate DWARF pubnames and pubtypes sections. + +gno-record-gcc-switches +Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1) +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. + +gno-split-dwarf +Common Driver RejectNegative Var(dwarf_split_debug_info,0) Init(0) +Don't generate debug information in separate .dwo files + +gsplit-dwarf +Common Driver RejectNegative Var(dwarf_split_debug_info,1) +Generate debug information in separate .dwo files + +gstabs +Common JoinedOrMissing Negative(gstabs+) +Generate debug information in STABS format + +gstabs+ +Common JoinedOrMissing Negative(gvms) +Generate debug information in extended STABS format + +gno-strict-dwarf +Common RejectNegative Var(dwarf_strict,0) Init(0) +Emit DWARF additions beyond selected version + +gstrict-dwarf +Common Report RejectNegative Var(dwarf_strict,1) +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 + +gxcoff +Common JoinedOrMissing Negative(gxcoff+) +Generate debug information in XCOFF format + +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 + +imultiarch +Common Joined Separate RejectDriver Var(imultiarch) Init(0) +-imultiarch Set to be the multiarch include subdirectory + +l +Driver Joined Separate + +n +Driver + +no-canonical-prefixes +Driver + +nodefaultlibs +Driver + +nostartfiles +Driver + +nostdlib +Driver + +o +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 Alias(Wpedantic) + +pedantic-errors +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-multiarch +Driver Var(print_multiarch) + +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) 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) RejectDriver +Display the compiler's version + +w +Common Var(inhibit_warnings) +Suppress warnings + +wrapper +Driver Separate Var(wrapper_string) + +x +Driver Joined Separate + +shared +Driver 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. + +static-libasan +Driver + +static-libtsan +Driver + +symbolic +Driver + +pie +Driver RejectNegative Negative(shared) +Create a position independent executable + +z +Driver Joined Separate + +; This comment is to ensure we retain the blank line above. -- cgit v1.2.3