3610 lines
103 KiB
Text
3610 lines
103 KiB
Text
; Options for the language- and target-independent parts of the compiler.
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; Copyright (C) 2003-2022 Free Software Foundation, Inc.
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;
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; This file is part of GCC.
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;
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; GCC is free software; you can redistribute it and/or modify it under
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; the terms of the GNU General Public License as published by the Free
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; Software Foundation; either version 3, or (at your option) any later
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; version.
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;
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; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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; WARRANTY; without even the implied warranty of MERCHANTABILITY or
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; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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; for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with GCC; see the file COPYING3. If not see
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; <http://www.gnu.org/licenses/>.
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; See the GCC internals manual (options.texi) for a description of this file's format.
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; Please try to keep this file in ASCII collating order.
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Variable
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int target_flags
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Variable
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int optimize
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Variable
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int optimize_size
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Variable
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int optimize_debug
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; Not used directly to control optimizations, only to save -Ofast
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; setting for "optimize" attributes.
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Variable
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int optimize_fast
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; True if this is the lto front end. This is used to disable gimple
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; generation and lowering passes that are normally run on the output
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; of a front end. These passes must be bypassed for lto since they
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; have already been done before the gimple was written.
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Variable
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bool in_lto_p = false
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; This variable is set to non-0 only by LTO front-end. 1 indicates that
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; the output produced will be used for incremental linking (thus weak symbols
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; can still be bound) and 2 indicates that the IL is going to be linked and
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; and output to LTO object file.
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Variable
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enum incremental_link flag_incremental_link = INCREMENTAL_LINK_NONE
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; 0 means straightforward implementation of complex divide acceptable.
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; 1 means wide ranges of inputs must work for complex divide.
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; 2 means C99-like requirements for complex multiply and divide.
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Variable
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int flag_complex_method = 1
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Variable
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int flag_default_complex_method = 1
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; Language specific warning pass for unused results.
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Variable
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bool flag_warn_unused_result = false
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; Nonzero if we should write GIMPLE bytecode for link-time optimization.
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Variable
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int flag_generate_lto
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; Nonzero if we should write GIMPLE bytecode for offload compilation.
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Variable
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int flag_generate_offload = 0
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; Nonzero means we should be saving declaration info into a .X file.
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Variable
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int flag_gen_aux_info = 0
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; Nonzero if we are compiling code for a shared library, zero for
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; executable.
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Variable
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int flag_shlib
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; These three are really VEC(char_p,heap) *.
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Variable
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void *flag_instrument_functions_exclude_functions
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Variable
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void *flag_instrument_functions_exclude_files
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Variable
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void *flag_ignored_attributes
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; Generic structs (e.g. templates not explicitly specialized)
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; may not have a compilation unit associated with them, and so
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; may need to be treated differently from ordinary structs.
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;
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; Structs only handled by reference (indirectly), will also usually
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; not need as much debugging information.
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Variable
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enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY }
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Variable
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enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY }
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; True if we should exit after parsing options.
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Variable
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bool exit_after_options
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; Type(s) of debugging information we are producing (if any). See
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; flag-types.h for the definitions of the different possible types of
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; debugging information.
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Variable
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uint32_t write_symbols = NO_DEBUG
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; Level of debugging information we are producing. See flag-types.h
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; for the definitions of the different possible levels.
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Variable
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enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE
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; Nonzero means use GNU-only extensions in the generated symbolic
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; debugging information. Currently, this only has an effect when
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; write_symbols is set to DBX_DEBUG or XCOFF_DEBUG.
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Variable
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bool use_gnu_debug_info_extensions
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; Level of CTF debugging information we are producing. See flag-types.h
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; for the definitions of the different possible levels.
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Variable
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enum ctf_debug_info_levels ctf_debug_info_level = CTFINFO_LEVEL_NONE
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; Original value of maximum field alignment in bytes, specified via
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; -fpack-struct=<value>.
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Variable
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unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT
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; Type of stack check.
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Variable
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enum stack_check_type flag_stack_check = NO_STACK_CHECK
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; True if stack usage information needs to be computed.
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Variable
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bool flag_stack_usage_info = false
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; -dA causes debug commentary information to be produced in
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; the generated assembly code (to make it more readable). This option
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; is generally only of use to those who actually need to read the
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; generated assembly code (perhaps while debugging the compiler itself).
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; Currently, this switch is only used by dwarf2out.cc; however, it is intended
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; to be a catchall for printing debug information in the assembler file.
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Variable
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int flag_debug_asm
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; Balance between GNAT encodings and standard DWARF to emit.
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Variable
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enum dwarf_gnat_encodings gnat_encodings = DWARF_GNAT_ENCODINGS_DEFAULT
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; -dP causes the rtl to be emitted as a comment in assembly.
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Variable
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int flag_dump_rtl_in_asm
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; Whether -da was passed (used only in handle_common_deferred_options).
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Variable
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bool flag_dump_all_passed
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; Other flags saying which kinds of debugging dump have been requested.
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Variable
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int rtl_dump_and_exit
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Variable
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int flag_print_asm_name
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; Name of top-level original source file (what was input to cpp).
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; This comes from the #-command at the beginning of the actual input.
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; If there isn't any there, then this is the cc1 input file name.
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Variable
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const char *main_input_filename
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; Pointer to base name in main_input_filename, with directories and a
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; single final extension removed, and the length of this base
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; name.
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Variable
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const char *main_input_basename
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Variable
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int main_input_baselength
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; The base name used for auxiliary output files.
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; dump_base_name minus dump_base_ext.
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Variable
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const char *aux_base_name
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; Which options have been printed by --help.
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Variable
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char *help_printed
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; Which enums have been printed by --help. 0 = not printed, no
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; relevant options seen, 1 = relevant option seen, not yet printed, 2
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; = printed.
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Variable
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char *help_enum_printed
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; The number of columns for --help output.
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Variable
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unsigned int help_columns
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; Whether this options structure has been through finish_options
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Variable
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bool flag_opts_finished
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; What the sanitizer should instrument
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Variable
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unsigned int flag_sanitize
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; What sanitizers should recover from errors
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Variable
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unsigned int flag_sanitize_recover = (SANITIZE_UNDEFINED | SANITIZE_UNDEFINED_NONDEFAULT | SANITIZE_KERNEL_ADDRESS | SANITIZE_KERNEL_HWADDRESS) & ~(SANITIZE_UNREACHABLE | SANITIZE_RETURN)
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; Flag whether a prefix has been added to dump_base_name
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Variable
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bool dump_base_name_prefixed = false
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; What subset of registers should be zeroed on function return
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Variable
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unsigned int flag_zero_call_used_regs
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###
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Driver
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-assemble
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Driver Alias(S)
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-compile
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Driver Alias(c)
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-completion=
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Common Driver Joined Undocumented
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Provide bash completion for options starting with provided string.
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-coverage
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Driver Alias(coverage)
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-debug
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Common Alias(g)
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-dump
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Common Separate Alias(d)
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-dump=
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Common Joined Alias(d)
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-dumpbase
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Driver Common Separate Alias(dumpbase)
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-dumpbase-ext
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Driver Common Separate Alias(dumpbase-ext)
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-dumpdir
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Driver Common Separate Alias(dumpdir)
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-entry
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Driver Separate Alias(e)
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-entry=
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Driver Joined Alias(e)
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-extra-warnings
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Common Warning Alias(Wextra)
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-for-assembler
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Driver Separate Alias(Xassembler)
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-for-assembler=
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Driver JoinedOrMissing Alias(Xassembler)
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-for-linker
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Driver Separate Alias(Xlinker)
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-for-linker=
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Driver JoinedOrMissing Alias(Xlinker)
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-force-link
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Driver Separate Alias(u)
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-force-link=
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Driver Joined Alias(u)
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-help
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Common Driver Var(help_flag)
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Display this information.
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-help=
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Common Driver Joined
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--help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params.
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-language
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Driver Separate Alias(x)
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-language=
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Driver Joined Alias(x)
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-library-directory
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Driver Separate Alias(L)
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-library-directory=
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Driver Joined Alias(L)
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-no-canonical-prefixes
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Driver Alias(no-canonical-prefixes)
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-no-standard-libraries
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Driver Alias(nostdlib)
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-no-sysroot-suffix
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Driver Var(no_sysroot_suffix)
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-no-warnings
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Common Alias(w)
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-optimize
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Common Alias(O)
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-output
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Common Driver Separate Alias(o) MissingArgError(missing filename after %qs)
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-output=
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Common Driver Joined Alias(o) MissingArgError(missing filename after %qs)
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-pass-exit-codes
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Driver Alias(pass-exit-codes)
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-pedantic
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Common Alias(Wpedantic)
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-pedantic-errors
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Common Alias(pedantic-errors)
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-pie
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Driver Alias(pie)
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-static-pie
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Driver Alias(static-pie)
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-pipe
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Driver Alias(pipe)
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-prefix
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Driver Separate Alias(B)
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-prefix=
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Driver JoinedOrMissing Alias(B)
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-preprocess
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Driver Alias(E)
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-print-file-name
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Driver Separate Alias(print-file-name=)
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-print-file-name=
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Driver JoinedOrMissing Alias(print-file-name=)
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-print-libgcc-file-name
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Driver Alias(print-libgcc-file-name)
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-print-multi-directory
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Driver Alias(print-multi-directory)
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-print-multi-lib
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Driver Alias(print-multi-lib)
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-print-multi-os-directory
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Driver Alias(print-multi-os-directory)
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-print-multiarch
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Driver Alias(print-multiarch)
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-print-prog-name
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Driver Separate Alias(print-prog-name=)
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-print-prog-name=
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Driver JoinedOrMissing Alias(print-prog-name=)
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-print-search-dirs
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Driver Alias(print-search-dirs)
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-print-sysroot
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Driver Alias(print-sysroot)
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-print-sysroot-headers-suffix
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Driver Alias(print-sysroot-headers-suffix)
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-profile
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Common Alias(p)
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-save-temps
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Driver Alias(save-temps)
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-shared
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Driver Alias(shared)
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-specs
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Driver Separate Alias(specs=)
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-specs=
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Driver Joined Alias(specs=)
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-static
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Driver Alias(static)
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-symbolic
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Driver Alias(symbolic)
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-target-help
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Common Driver
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Display target specific command line options (including assembler and linker options).
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-time
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Driver Alias(time)
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-verbose
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Driver Alias(v)
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;; The driver used to convert options such as --help into forms such
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;; as -fhelp; the following four entries are for compatibility with
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;; any direct uses of those (undocumented) -f forms
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fhelp
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Common Driver Alias(-help)
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fhelp=
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Common Driver Joined Alias(-help=)
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ftarget-help
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Common Driver Alias(-target-help)
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fversion
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Common Driver Alias(-version)
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-sysroot
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Driver Separate Alias(-sysroot=)
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-sysroot=
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Driver JoinedOrMissing
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-version
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Common Driver
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B
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Driver Joined Separate
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E
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Driver
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L
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Driver Joined Separate
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N
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Driver
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O
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Common JoinedOrMissing Optimization
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-O<number> Set optimization level to <number>.
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Os
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Common Optimization
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Optimize for space rather than speed.
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Ofast
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Common Optimization
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Optimize for speed disregarding exact standards compliance.
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Og
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Common Optimization
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Optimize for debugging experience rather than speed or size.
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Oz
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Common Optimization
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Optimize for space aggressively rather than speed.
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Q
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Driver
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Qn
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Driver Negative(Qy)
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Qy
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Driver Negative(Qn)
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R
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Driver Joined Separate
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S
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Driver
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T
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Driver Joined Separate
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Tbss
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Driver Separate
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Tbss=
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Driver Joined
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Tdata
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Driver Separate
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Tdata=
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Driver Joined
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Ttext
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Driver Separate
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Ttext=
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Driver Joined
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W
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Common RejectNegative Warning Alias(Wextra)
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This switch is deprecated; use -Wextra instead.
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Wa,
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Driver JoinedOrMissing RejectNegative
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Wl,
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Driver JoinedOrMissing RejectNegative
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Wp,
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Driver JoinedOrMissing RejectNegative
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Waggregate-return
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Common Var(warn_aggregate_return) Warning
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Warn about returning structures, unions or arrays.
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Waggressive-loop-optimizations
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Common Var(warn_aggressive_loop_optimizations) Init(1) Warning
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Warn if a loop with constant number of iterations triggers undefined behavior.
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Warray-bounds
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Common Var(warn_array_bounds) Warning
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Warn if an array is accessed out of bounds.
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Warray-bounds=
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Common Joined RejectNegative UInteger Var(warn_array_bounds) Warning IntegerRange(0, 2)
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Warn if an array is accessed out of bounds.
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Wuse-after-free
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Common Var(warn_use_after_free) Warning
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Warn for uses of pointers to deallocated storage.
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Wuse-after-free=
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Common Joined RejectNegative UInteger Var(warn_use_after_free) Warning IntegerRange(0, 3)
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Warn for uses of pointers to deallocated storage.
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Wattributes
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Common Var(warn_attributes) Init(1) Warning
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Warn about inappropriate attribute usage.
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Wattributes=
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Common Joined
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Do not warn about specified attributes.
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Wattribute-alias
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Common Alias(Wattribute_alias=, 1, 0) Warning
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Warn about type safety and similar errors and mismatches in declarations with alias attributes.
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Wattribute-alias=
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Common Joined RejectNegative UInteger Var(warn_attribute_alias) Init(1) Warning IntegerRange(0, 2)
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Warn about type safety and similar errors and mismatches in declarations with alias attributes.
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Wcannot-profile
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Common Var(warn_cannot_profile) Init(1) Warning
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Warn when profiling instrumentation was requested, but could not be applied to
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a certain function.
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Wcast-align
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Common Var(warn_cast_align) Warning
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Warn about pointer casts which increase alignment.
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Wcast-align=strict
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Common Var(warn_cast_align,2) Warning
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Warn about pointer casts which increase alignment.
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Wcpp
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Common Var(warn_cpp) Init(1) Warning
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Warn when a #warning directive is encountered.
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Wattribute-warning
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Common Var(warn_attribute_warning) Init(1) Warning
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Warn about uses of __attribute__((warning)) declarations.
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Wdeprecated
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Common Var(warn_deprecated) Init(1) Warning
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Warn if a deprecated compiler feature, class, method, or field is used.
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Wdeprecated-declarations
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Common Var(warn_deprecated_decl) Init(1) Warning
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Warn about uses of __attribute__((deprecated)) declarations.
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Wdisabled-optimization
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Common Var(warn_disabled_optimization) Warning
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Warn when an optimization pass is disabled.
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Werror
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Common Var(warnings_are_errors)
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Treat all warnings as errors.
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Werror=
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Common Joined
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Treat specified warning as error.
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Wextra
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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 Host_Wide_Int ByteSize Warning Var(warn_frame_larger_than_size) Init(HOST_WIDE_INT_MAX)
|
|
-Wframe-larger-than=<byte-size> Warn if a function's stack frame requires in excess of <byte-size>.
|
|
|
|
Wno-frame-larger-than
|
|
Common Alias(Wframe-larger-than=,18446744073709551615EiB,none) Warning
|
|
Disable -Wframe-larger-than= warning. Equivalent to -Wframe-larger-than=<SIZE_MAX> or larger.
|
|
|
|
Wfree-nonheap-object
|
|
Common Var(warn_free_nonheap_object) Init(1) Warning
|
|
Warn when attempting to free a non-heap object.
|
|
|
|
Whsa
|
|
Common Ignore Warning
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
Wimplicit-fallthrough
|
|
Common Alias(Wimplicit-fallthrough=,3,0) Warning
|
|
|
|
Wimplicit-fallthrough=
|
|
Common Var(warn_implicit_fallthrough) RejectNegative Joined UInteger Warning IntegerRange(0, 5)
|
|
Warn when a switch case falls through.
|
|
|
|
Winfinite-recursion
|
|
Var(warn_infinite_recursion) Warning
|
|
Warn for infinitely recursive calls.
|
|
|
|
Winline
|
|
Common Var(warn_inline) Warning Optimization
|
|
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 Host_Wide_Int ByteSize Warning Var(warn_larger_than_size) Init(HOST_WIDE_INT_MAX)
|
|
-Wlarger-than=<byte-size> Warn if an object's size exceeds <byte-size>.
|
|
|
|
Wno-larger-than
|
|
Common Alias(Wlarger-than=,18446744073709551615EiB,none) Warning
|
|
Disable -Wlarger-than= warning. Equivalent to -Wlarger-than=<SIZE_MAX> or larger.
|
|
|
|
Wnonnull-compare
|
|
Var(warn_nonnull_compare) Warning
|
|
Warn if comparing pointer parameter with nonnull attribute with NULL.
|
|
|
|
Wnull-dereference
|
|
Common Var(warn_null_dereference) Warning
|
|
Warn if dereferencing a NULL pointer may lead to erroneous or undefined behavior.
|
|
|
|
Wunsafe-loop-optimizations
|
|
Common Ignore Warning
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
Wmissing-noreturn
|
|
Common Warning Alias(Wsuggest-attribute=noreturn)
|
|
|
|
Wodr
|
|
Common Var(warn_odr_violations) Init(1) Warning
|
|
Warn about some C++ One Definition Rule violations during link time optimization.
|
|
|
|
Woverflow
|
|
Common Var(warn_overflow) Init(1) Warning
|
|
Warn about overflow in arithmetic expressions.
|
|
|
|
Wlto-type-mismatch
|
|
Common Var(warn_lto_type_mismatch) Init(1) Warning
|
|
During link time optimization warn about mismatched types of global declarations.
|
|
|
|
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) Init(0) Warning
|
|
Issue warnings needed for strict compliance to the standard.
|
|
|
|
Wreturn-local-addr
|
|
Common Var(warn_return_local_addr) Init(1) Warning
|
|
Warn about returning a pointer/reference to a local or temporary variable.
|
|
|
|
Wshadow
|
|
Common Var(warn_shadow) Warning
|
|
Warn when one variable shadows another. Same as -Wshadow=global.
|
|
|
|
Wshadow=global
|
|
Common Warning Alias(Wshadow)
|
|
Warn when one variable shadows another (globally).
|
|
|
|
Wshadow=local
|
|
Common Var(warn_shadow_local) Warning EnabledBy(Wshadow)
|
|
Warn when one local variable shadows another local variable or parameter.
|
|
|
|
Wshadow-local
|
|
Common Warning Undocumented Alias(Wshadow=local)
|
|
|
|
Wshadow=compatible-local
|
|
Common Var(warn_shadow_compatible_local) Warning EnabledBy(Wshadow=local)
|
|
Warn when one local variable shadows another local variable or parameter of compatible type.
|
|
|
|
Wshadow-compatible-local
|
|
Common Warning Undocumented Alias(Wshadow=compatible-local)
|
|
|
|
Wstack-protector
|
|
Common Var(warn_stack_protect) Warning
|
|
Warn when not issuing stack smashing protection for some reason.
|
|
|
|
Wstack-usage=
|
|
Common Joined RejectNegative Host_Wide_Int ByteSize Var(warn_stack_usage) Warning Init(HOST_WIDE_INT_MAX)
|
|
-Wstack-usage=<byte-size> Warn if stack usage might exceed <byte-size>.
|
|
|
|
Wno-stack-usage
|
|
Common Alias(Wstack-usage=,18446744073709551615EiB,none) Warning
|
|
Disable Wstack-usage= warning. Equivalent to Wstack-usage=<SIZE_MAX> or larger.
|
|
|
|
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=cold
|
|
Common Var(warn_suggest_attribute_cold) Warning
|
|
Warn about functions which might be candidates for __attribute__((cold)).
|
|
|
|
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)).
|
|
|
|
Wsuggest-attribute=malloc
|
|
Common Var(warn_suggest_attribute_malloc) Warning
|
|
Warn about functions which might be candidates for __attribute__((malloc)).
|
|
|
|
Wsuggest-final-types
|
|
Common Var(warn_suggest_final_types) Warning
|
|
Warn about C++ polymorphic types where adding final keyword would improve code quality.
|
|
|
|
Wsuggest-final-methods
|
|
Common Var(warn_suggest_final_methods) Warning
|
|
Warn about C++ virtual methods where adding final keyword would improve code quality.
|
|
|
|
Wswitch-unreachable
|
|
Common Var(warn_switch_unreachable) Warning Init(1)
|
|
Warn about statements between switch's controlling expression and the first
|
|
case.
|
|
|
|
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.
|
|
|
|
Wtrivial-auto-var-init
|
|
Common Var(warn_trivial_auto_var_init) Warning Init(0)
|
|
Warn about cases where -ftrivial-auto-var-init cannot initialize an auto variable.
|
|
|
|
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 Warning
|
|
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.
|
|
|
|
Wcoverage-invalid-line-number
|
|
Common Var(warn_coverage_invalid_linenum) Init(1) Warning
|
|
Warn in case a function ends earlier than it begins due to an invalid linenum macros.
|
|
|
|
Wmissing-profile
|
|
Common Var(warn_missing_profile) Init(1) Warning
|
|
Warn in case profiles in -fprofile-use do not exist.
|
|
|
|
Wvector-operation-performance
|
|
Common Var(warn_vector_operation_performance) Warning
|
|
Warn when a vector operation is compiled outside the SIMD.
|
|
|
|
Wtsan
|
|
Common Var(warn_tsan) Init(1) Warning
|
|
Warn about unsupported features in ThreadSanitizer.
|
|
|
|
Xassembler
|
|
Driver Separate
|
|
|
|
Xlinker
|
|
Driver Separate
|
|
|
|
Xpreprocessor
|
|
Driver Separate
|
|
|
|
Z
|
|
Driver
|
|
|
|
aux-info
|
|
Common Separate Var(aux_info_file_name)
|
|
-aux-info <file> Emit declaration information into <file>.
|
|
|
|
aux-info=
|
|
Common Joined Alias(aux-info)
|
|
|
|
coverage
|
|
Driver
|
|
|
|
c
|
|
Driver
|
|
|
|
d
|
|
Common Joined
|
|
-d<letters> Enable dumps from specific passes of the compiler.
|
|
|
|
dumpbase
|
|
Driver Common Separate Var(dump_base_name)
|
|
-dumpbase <file> Set the file basename to be used for dumps.
|
|
|
|
dumpbase-ext
|
|
Driver Common Separate Var(dump_base_ext)
|
|
-dumpbase-ext .<ext> Drop a trailing .<ext> from the dump basename to name auxiliary output files.
|
|
|
|
dumpdir
|
|
Driver Common Separate Var(dump_dir_name)
|
|
-dumpdir <dir> Set the directory name to be used for dumps.
|
|
|
|
dumpmachine
|
|
Driver
|
|
|
|
dumpspecs
|
|
Driver
|
|
|
|
dumpversion
|
|
Driver
|
|
|
|
dumpfullversion
|
|
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. No longer selectable.
|
|
;
|
|
; 2: The version of the ABI first used in G++ 3.4, and the default
|
|
; until GCC 4.9.
|
|
;
|
|
; 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.
|
|
;
|
|
; 8: The version of the ABI that corrects the substitution behavior of
|
|
; function types with function-cv-qualifiers.
|
|
; First selectable in G++ 4.9 and default in G++ 5.
|
|
;
|
|
; 9: The version of the ABI that corrects the alignment of nullptr_t.
|
|
; First selectable and default in G++ 5.2.
|
|
;
|
|
; 10: The version of the ABI that mangles attributes that affect type
|
|
; identity, such as ia32 calling convention attributes (stdcall, etc.)
|
|
; Default in G++ 6 (set in c_common_post_options).
|
|
;
|
|
; 11: The version of the ABI that corrects mangling of sizeof... expressions
|
|
; and introduces new inheriting constructor handling.
|
|
; Default in G++ 7.
|
|
;
|
|
; 12: Corrects the calling convention for classes with only deleted copy/move
|
|
; constructors and changes passing/returning of empty records.
|
|
; Default in G++ 8.1.
|
|
;
|
|
; 13: Fixes the accidental change in 12 to the calling convention for classes
|
|
; with deleted copy constructor and trivial move constructor.
|
|
; Default in G++ 8.2.
|
|
;
|
|
; 14: Corrects the mangling of nullptr expression.
|
|
; Default in G++ 10.
|
|
;
|
|
; 15: Corrects G++ 10 ABI tag regression [PR98481].
|
|
; Available, but not default, in G++ 10.3.
|
|
;
|
|
; 16: Changes the mangling of __alignof__ to be distinct from that of alignof.
|
|
; Adds missing 'on' in mangling of operator names in some cases.
|
|
; Default in G++ 11.
|
|
;
|
|
; 17: Fixes layout of classes that inherit from aggregate classes with default
|
|
; member initializers in C++14 and up.
|
|
; Default in G++ 12.
|
|
;
|
|
; 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(0)
|
|
The version of the C++ ABI in use.
|
|
|
|
faggressive-loop-optimizations
|
|
Common Var(flag_aggressive_loop_optimizations) Optimization Init(1)
|
|
Aggressively optimize loops using language constraints.
|
|
|
|
falign-functions
|
|
Common Var(flag_align_functions) Optimization
|
|
Align the start of functions.
|
|
|
|
falign-functions=
|
|
Common RejectNegative Joined Var(str_align_functions) Optimization
|
|
|
|
flimit-function-alignment
|
|
Common Var(flag_limit_function_alignment) Optimization Init(0)
|
|
|
|
falign-jumps
|
|
Common Var(flag_align_jumps) Optimization
|
|
Align labels which are only reached by jumping.
|
|
|
|
falign-jumps=
|
|
Common RejectNegative Joined Var(str_align_jumps) Optimization
|
|
|
|
falign-labels
|
|
Common Var(flag_align_labels) Optimization
|
|
Align all labels.
|
|
|
|
falign-labels=
|
|
Common RejectNegative Joined Var(str_align_labels) Optimization
|
|
|
|
falign-loops
|
|
Common Var(flag_align_loops) Optimization
|
|
Align the start of loops.
|
|
|
|
falign-loops=
|
|
Common RejectNegative Joined Var(str_align_loops) Optimization
|
|
|
|
fallow-store-data-races
|
|
Common Var(flag_store_data_races) Optimization
|
|
Allow the compiler to introduce new data races on stores.
|
|
|
|
fanalyzer
|
|
Common Var(flag_analyzer)
|
|
Enable static analysis pass.
|
|
|
|
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=
|
|
Common Driver Joined
|
|
Select what to sanitize.
|
|
|
|
fsanitize-coverage=
|
|
Common Joined Enum(sanitize_coverage) Var(flag_sanitize_coverage) EnumBitSet
|
|
Select type of coverage sanitization.
|
|
|
|
Enum
|
|
Name(sanitize_coverage) Type(int)
|
|
|
|
EnumValue
|
|
Enum(sanitize_coverage) String(trace-pc) Value(SANITIZE_COV_TRACE_PC)
|
|
|
|
EnumValue
|
|
Enum(sanitize_coverage) String(trace-cmp) Value(SANITIZE_COV_TRACE_CMP)
|
|
|
|
fasan-shadow-offset=
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fasan-shadow-offset=<number> Use custom shadow memory offset.
|
|
|
|
fsanitize-sections=
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fsanitize-sections=<sec1,sec2,...> Sanitize global variables
|
|
in user-defined sections.
|
|
|
|
fsanitize-recover=
|
|
Common Joined
|
|
After diagnosing undefined behavior attempt to continue execution.
|
|
|
|
fsanitize-recover
|
|
Common
|
|
This switch is deprecated; use -fsanitize-recover= instead.
|
|
|
|
fsanitize-address-use-after-scope
|
|
Common Driver Var(flag_sanitize_address_use_after_scope) Init(0)
|
|
|
|
fsanitize-undefined-trap-on-error
|
|
Common Driver Var(flag_sanitize_undefined_trap_on_error) Init(0)
|
|
Use trap instead of a library function for undefined behavior sanitization.
|
|
|
|
fasynchronous-unwind-tables
|
|
Common Var(flag_asynchronous_unwind_tables) Optimization
|
|
Generate unwind tables that are exact at each instruction boundary.
|
|
|
|
fauto-inc-dec
|
|
Common Var(flag_auto_inc_dec) Init(1) Optimization
|
|
Generate auto-inc/dec instructions.
|
|
|
|
fauto-profile
|
|
Common Var(flag_auto_profile)
|
|
Use sample profile information for call graph node weights. The default
|
|
profile file is fbdata.afdo in 'pwd'.
|
|
|
|
fauto-profile=
|
|
Common Joined RejectNegative Var(auto_profile_file)
|
|
Use sample profile information for call graph node weights. The profile
|
|
file is specified in the argument.
|
|
|
|
; -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 Var(flag_bounds_check)
|
|
Generate code to check bounds before indexing arrays.
|
|
|
|
fbranch-count-reg
|
|
Common Var(flag_branch_on_count_reg) Optimization
|
|
Replace add, compare, branch with branch on count register.
|
|
|
|
fbranch-probabilities
|
|
Common Var(flag_branch_probabilities) Optimization
|
|
Use profiling information for branch probabilities.
|
|
|
|
fbranch-target-load-optimize
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
fbranch-target-load-optimize2
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
fbtr-bb-exclusive
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
fcallgraph-info
|
|
Common RejectNegative Var(flag_callgraph_info) Init(NO_CALLGRAPH_INFO);
|
|
Output callgraph information on a per-file basis.
|
|
|
|
fcallgraph-info=
|
|
Common RejectNegative Joined
|
|
Output callgraph information on a per-file basis with decorations.
|
|
|
|
fcall-saved-
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fcall-saved-<register> Mark <register> as being preserved across functions.
|
|
|
|
fcall-used-
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fcall-used-<register> Mark <register> as being corrupted by function calls.
|
|
|
|
; Nonzero for -fcaller-saves: allocate values in regs that need to
|
|
; be saved across function calls, if that produces overall better code.
|
|
; Optional now, so people can test it.
|
|
fcaller-saves
|
|
Common Var(flag_caller_saves) Optimization
|
|
Save registers around function calls.
|
|
|
|
fcheck-data-deps
|
|
Common Ignore
|
|
This switch is deprecated; do not use.
|
|
|
|
fcheck-new
|
|
Common Var(flag_check_new)
|
|
Check the return value of new in C++.
|
|
|
|
fchecking
|
|
Common Var(flag_checking) Init(CHECKING_P ? ENABLE_EXTRA_CHECKING ? 2 : 1 : 0)
|
|
Perform internal consistency checkings.
|
|
|
|
fchecking=
|
|
Common Joined RejectNegative UInteger Var(flag_checking)
|
|
Perform internal consistency checkings.
|
|
|
|
fcode-hoisting
|
|
Common Var(flag_code_hoisting) Optimization
|
|
Enable code hoisting.
|
|
|
|
fcombine-stack-adjustments
|
|
Common Var(flag_combine_stack_adjustments) Optimization
|
|
Looks for opportunities to reduce stack adjustments and stack references.
|
|
|
|
fcommon
|
|
Common Var(flag_no_common,0) Init(1)
|
|
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[=<opts>] 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 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 Var(flag_cprop_registers) Optimization
|
|
Perform a register copy-propagation optimization pass.
|
|
|
|
fcrossjumping
|
|
Common Var(flag_crossjumping) Optimization
|
|
Perform cross-jumping optimization.
|
|
|
|
fcse-follow-jumps
|
|
Common 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 Var(flag_cx_limited_range) Optimization SetByCombined
|
|
Omit range reduction step when performing complex division.
|
|
|
|
fcx-fortran-rules
|
|
Common Var(flag_cx_fortran_rules) Optimization
|
|
Complex multiplication and division follow Fortran rules.
|
|
|
|
fdata-sections
|
|
Common Var(flag_data_sections)
|
|
Place data items into their own section.
|
|
|
|
fdbg-cnt-list
|
|
Common Var(flag_dbg_cnt_list)
|
|
List all available debugging counters with their limits and counts.
|
|
|
|
fdbg-cnt=
|
|
Common RejectNegative Joined Var(common_deferred_options) Defer
|
|
-fdbg-cnt=<counter>[:<lower_limit1>-]<upper_limit1>[:<lower_limit2>-<upper_limit2>:...][,<counter>:...] Set the debug counter limit.
|
|
|
|
fdebug-prefix-map=
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fdebug-prefix-map=<old>=<new> Map one directory name to another in debug information.
|
|
|
|
ffile-prefix-map=
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-ffile-prefix-map=<old>=<new> Map one directory name to another in compilation result.
|
|
|
|
fdebug-types-section
|
|
Common 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 Var(flag_defer_pop) Optimization
|
|
Defer popping functions args from stack until later.
|
|
|
|
fdelayed-branch
|
|
Common Var(flag_delayed_branch) Optimization
|
|
Attempt to fill delay slots of branch instructions.
|
|
|
|
fdelete-dead-exceptions
|
|
Common Var(flag_delete_dead_exceptions) Init(0) Optimization
|
|
Delete dead instructions that may throw exceptions.
|
|
|
|
fdelete-null-pointer-checks
|
|
Common Var(flag_delete_null_pointer_checks) Init(-1) Optimization
|
|
Delete useless null pointer checks.
|
|
|
|
fdevirtualize-at-ltrans
|
|
Common Var(flag_ltrans_devirtualize)
|
|
Stream extra data to support more aggressive devirtualization in LTO local transformation mode.
|
|
|
|
fdevirtualize-speculatively
|
|
Common Var(flag_devirtualize_speculatively) Optimization
|
|
Perform speculative devirtualization.
|
|
|
|
fdevirtualize
|
|
Common 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-labels
|
|
Common Var(flag_diagnostics_show_labels) Init(1)
|
|
Show labels annotating ranges of source code when showing source.
|
|
|
|
fdiagnostics-show-line-numbers
|
|
Common Var(flag_diagnostics_show_line_numbers) Init(1)
|
|
Show line numbers in the left margin when showing source.
|
|
|
|
fdiagnostics-color
|
|
Common Alias(fdiagnostics-color=,always,never)
|
|
;
|
|
|
|
fdiagnostics-color=
|
|
Driver Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO)
|
|
-fdiagnostics-color=[never|always|auto] Colorize diagnostics.
|
|
|
|
; Required for these enum values.
|
|
SourceInclude
|
|
diagnostic-color.h
|
|
|
|
Enum
|
|
Name(diagnostic_color_rule) Type(int)
|
|
|
|
EnumValue
|
|
Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO)
|
|
|
|
EnumValue
|
|
Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES)
|
|
|
|
EnumValue
|
|
Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO)
|
|
|
|
fdiagnostics-urls=
|
|
Driver Common Joined RejectNegative Var(flag_diagnostics_show_urls) Enum(diagnostic_url_rule) Init(DIAGNOSTICS_URL_AUTO)
|
|
-fdiagnostics-urls=[never|always|auto] Embed URLs in diagnostics.
|
|
|
|
; Required for these enum values.
|
|
SourceInclude
|
|
diagnostic-url.h
|
|
|
|
Enum
|
|
Name(diagnostic_url_rule) Type(int)
|
|
|
|
EnumValue
|
|
Enum(diagnostic_url_rule) String(never) Value(DIAGNOSTICS_URL_NO)
|
|
|
|
EnumValue
|
|
Enum(diagnostic_url_rule) String(always) Value(DIAGNOSTICS_URL_YES)
|
|
|
|
EnumValue
|
|
Enum(diagnostic_url_rule) String(auto) Value(DIAGNOSTICS_URL_AUTO)
|
|
|
|
fdiagnostics-column-unit=
|
|
Common Joined RejectNegative Enum(diagnostics_column_unit)
|
|
-fdiagnostics-column-unit=[display|byte] Select whether column numbers are output as display columns (default) or raw bytes.
|
|
|
|
fdiagnostics-column-origin=
|
|
Common Joined RejectNegative UInteger
|
|
-fdiagnostics-column-origin=<number> Set the number of the first column. The default is 1-based as per GNU style, but some utilities may expect 0-based, for example.
|
|
|
|
fdiagnostics-format=
|
|
Common Joined RejectNegative Enum(diagnostics_output_format)
|
|
-fdiagnostics-format=[text|json] Select output format.
|
|
|
|
fdiagnostics-escape-format=
|
|
Common Joined RejectNegative Enum(diagnostics_escape_format)
|
|
-fdiagnostics-escape-format=[unicode|bytes] Select how to escape non-printable-ASCII bytes in the source for diagnostics that suggest it.
|
|
|
|
; Required for these enum values.
|
|
SourceInclude
|
|
diagnostic.h
|
|
|
|
Enum
|
|
Name(diagnostics_column_unit) Type(int)
|
|
|
|
EnumValue
|
|
Enum(diagnostics_column_unit) String(display) Value(DIAGNOSTICS_COLUMN_UNIT_DISPLAY)
|
|
|
|
EnumValue
|
|
Enum(diagnostics_column_unit) String(byte) Value(DIAGNOSTICS_COLUMN_UNIT_BYTE)
|
|
|
|
Enum
|
|
Name(diagnostics_escape_format) Type(int)
|
|
|
|
EnumValue
|
|
Enum(diagnostics_escape_format) String(unicode) Value(DIAGNOSTICS_ESCAPE_FORMAT_UNICODE)
|
|
|
|
EnumValue
|
|
Enum(diagnostics_escape_format) String(bytes) Value(DIAGNOSTICS_ESCAPE_FORMAT_BYTES)
|
|
|
|
Enum
|
|
Name(diagnostics_output_format) Type(int)
|
|
|
|
EnumValue
|
|
Enum(diagnostics_output_format) String(text) Value(DIAGNOSTICS_OUTPUT_FORMAT_TEXT)
|
|
|
|
EnumValue
|
|
Enum(diagnostics_output_format) String(json) Value(DIAGNOSTICS_OUTPUT_FORMAT_JSON)
|
|
|
|
fdiagnostics-parseable-fixits
|
|
Common Var(flag_diagnostics_parseable_fixits)
|
|
Print fix-it hints in machine-readable form.
|
|
|
|
fdiagnostics-generate-patch
|
|
Common Var(flag_diagnostics_generate_patch)
|
|
Print fix-it hints to stderr in unified diff format.
|
|
|
|
fdiagnostics-show-option
|
|
Common Var(flag_diagnostics_show_option) Init(1)
|
|
Amend appropriate diagnostic messages with the command line option that controls them.
|
|
|
|
fdiagnostics-show-cwe
|
|
Common Var(flag_diagnostics_show_cwe) Init(1)
|
|
Print CWE identifiers for diagnostic messages, where available.
|
|
|
|
fdiagnostics-path-format=
|
|
Common Joined RejectNegative Var(flag_diagnostics_path_format) Enum(diagnostic_path_format) Init(DPF_INLINE_EVENTS)
|
|
Specify how to print any control-flow path associated with a diagnostic.
|
|
|
|
fdiagnostics-plain-output
|
|
Driver Common RejectNegative
|
|
Turn off any diagnostics features that complicate the output, such as line numbers, color, and warning URLs.
|
|
|
|
ftabstop=
|
|
Common Joined RejectNegative UInteger
|
|
-ftabstop=<number> Distance between tab stops for column reporting.
|
|
|
|
Enum
|
|
Name(diagnostic_path_format) Type(int)
|
|
|
|
EnumValue
|
|
Enum(diagnostic_path_format) String(none) Value(DPF_NONE)
|
|
|
|
EnumValue
|
|
Enum(diagnostic_path_format) String(separate-events) Value(DPF_SEPARATE_EVENTS)
|
|
|
|
EnumValue
|
|
Enum(diagnostic_path_format) String(inline-events) Value(DPF_INLINE_EVENTS)
|
|
|
|
fdiagnostics-show-path-depths
|
|
Common Var(flag_diagnostics_show_path_depths) Init(0)
|
|
Show stack depths of events in paths.
|
|
|
|
fdiagnostics-minimum-margin-width=
|
|
Common Joined UInteger Var(diagnostics_minimum_margin_width) Init(6)
|
|
Set minimum width of left margin of source code when showing source.
|
|
|
|
fdisable-
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fdisable-[tree|rtl|ipa]-<pass>=range1+range2 Disable an optimization pass.
|
|
|
|
fenable-
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fenable-[tree|rtl|ipa]-<pass>=range1+range2 Enable an optimization pass.
|
|
|
|
fdump-
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fdump-<type> 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 Var(flag_dump_noaddr)
|
|
Suppress output of addresses in debugging dumps.
|
|
|
|
freport-bug
|
|
Common Driver Var(flag_report_bug)
|
|
Collect and dump debug information into temporary file if ICE in C/C++
|
|
compiler occurred.
|
|
|
|
fdump-internal-locations
|
|
Common Var(flag_dump_locations) Init(0)
|
|
Dump detailed information on GCC's internal representation of source code locations.
|
|
|
|
fdump-passes
|
|
Common Var(flag_dump_passes) Init(0)
|
|
Dump optimization passes.
|
|
|
|
fdump-unnumbered
|
|
Common Var(flag_dump_unnumbered)
|
|
Suppress output of instruction numbers, line number notes and addresses in debugging dumps.
|
|
|
|
fdump-unnumbered-links
|
|
Common Var(flag_dump_unnumbered_links)
|
|
Suppress output of previous and next insn numbers in debugging dumps.
|
|
|
|
fdwarf2-cfi-asm
|
|
Common Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE)
|
|
Enable CFI tables via GAS assembler directives.
|
|
|
|
fearly-inlining
|
|
Common Var(flag_early_inlining) Init(1) Optimization
|
|
Perform early inlining.
|
|
|
|
feliminate-dwarf2-dups
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
fipa-sra
|
|
Common Var(flag_ipa_sra) Init(0) Optimization
|
|
Perform interprocedural reduction of aggregates.
|
|
|
|
feliminate-unused-debug-symbols
|
|
Common Var(flag_debug_only_used_symbols) Init(1)
|
|
Perform unused symbol elimination in debug info.
|
|
|
|
feliminate-unused-debug-types
|
|
Common Var(flag_eliminate_unused_debug_types) Init(1)
|
|
Perform unused type elimination in debug info.
|
|
|
|
femit-class-debug-always
|
|
Common Var(flag_emit_class_debug_always) Init(0)
|
|
Do not suppress C++ class debug information.
|
|
|
|
fexceptions
|
|
Common Var(flag_exceptions) Optimization EnabledBy(fnon-call-exceptions)
|
|
Enable exception handling.
|
|
|
|
fexpensive-optimizations
|
|
Common Var(flag_expensive_optimizations) Optimization
|
|
Perform a number of minor, expensive optimizations.
|
|
|
|
fexcess-precision=
|
|
Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision) Init(EXCESS_PRECISION_DEFAULT) Optimization SetByCombined
|
|
-fexcess-precision=[fast|standard|16] 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)
|
|
|
|
EnumValue
|
|
Enum(excess_precision) String(16) Value(EXCESS_PRECISION_FLOAT16)
|
|
|
|
; Whether we permit the extended set of values for FLT_EVAL_METHOD
|
|
; introduced in ISO/IEC TS 18661-3, or limit ourselves to those in C99/C11.
|
|
fpermitted-flt-eval-methods=
|
|
Common Joined RejectNegative Enum(permitted_flt_eval_methods) Var(flag_permitted_flt_eval_methods) Init(PERMITTED_FLT_EVAL_METHODS_DEFAULT)
|
|
-fpermitted-flt-eval-methods=[c11|ts-18661] Specify which values of FLT_EVAL_METHOD are permitted.
|
|
|
|
Enum
|
|
Name(permitted_flt_eval_methods) Type(enum permitted_flt_eval_methods) UnknownError(unknown specification for the set of FLT_EVAL_METHOD values to permit %qs)
|
|
|
|
EnumValue
|
|
Enum(permitted_flt_eval_methods) String(c11) Value(PERMITTED_FLT_EVAL_METHODS_C11)
|
|
|
|
EnumValue
|
|
Enum(permitted_flt_eval_methods) String(ts-18661-3) Value(PERMITTED_FLT_EVAL_METHODS_TS_18661)
|
|
|
|
ffast-math
|
|
Common Optimization
|
|
|
|
ffat-lto-objects
|
|
Common Var(flag_fat_lto_objects)
|
|
Output lto objects containing both the intermediate language and binary output.
|
|
|
|
ffinite-math-only
|
|
Common Var(flag_finite_math_only) Optimization SetByCombined
|
|
Assume no NaNs or infinities are generated.
|
|
|
|
ffinite-loops
|
|
Common Var(flag_finite_loops) Optimization Init(0)
|
|
Assume that loops with an exit will terminate and not loop indefinitely.
|
|
|
|
ffixed-
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-ffixed-<register> Mark <register> as being unavailable to the compiler.
|
|
|
|
ffloat-store
|
|
Common 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 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) Optimization
|
|
-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)
|
|
|
|
ffp-int-builtin-inexact
|
|
Common Var(flag_fp_int_builtin_inexact) Init(1) Optimization
|
|
Allow built-in functions ceil, floor, round, trunc to raise \"inexact\" exceptions.
|
|
|
|
; 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 Var(flag_no_function_cse,0) Optimization
|
|
Allow function addresses to be held in registers.
|
|
|
|
ffunction-sections
|
|
Common Var(flag_function_sections)
|
|
Place each function into its own section.
|
|
|
|
fgcse
|
|
Common Var(flag_gcse) Optimization
|
|
Perform global common subexpression elimination.
|
|
|
|
fgcse-lm
|
|
Common Var(flag_gcse_lm) Init(1) Optimization
|
|
Perform enhanced load motion during global common subexpression elimination.
|
|
|
|
fgcse-sm
|
|
Common Var(flag_gcse_sm) Init(0) Optimization
|
|
Perform store motion after global common subexpression elimination.
|
|
|
|
fgcse-las
|
|
Common Var(flag_gcse_las) Init(0) Optimization
|
|
Perform redundant load after store elimination in global common subexpression
|
|
elimination.
|
|
|
|
fgcse-after-reload
|
|
Common Var(flag_gcse_after_reload) Optimization
|
|
Perform global common subexpression elimination after register allocation has
|
|
finished.
|
|
|
|
Enum
|
|
Name(dwarf_gnat_encodings) Type(int)
|
|
|
|
EnumValue
|
|
Enum(dwarf_gnat_encodings) String(all) Value(DWARF_GNAT_ENCODINGS_ALL)
|
|
|
|
EnumValue
|
|
Enum(dwarf_gnat_encodings) String(gdb) Value(DWARF_GNAT_ENCODINGS_GDB)
|
|
|
|
EnumValue
|
|
Enum(dwarf_gnat_encodings) String(minimal) Value(DWARF_GNAT_ENCODINGS_MINIMAL)
|
|
|
|
fgnat-encodings=
|
|
Common Enum(dwarf_gnat_encodings) Joined RejectNegative Undocumented Var(gnat_encodings)
|
|
-fgnat-encodings=[all|gdb|minimal] Select the balance between GNAT encodings and standard DWARF emitted in the debug information.
|
|
|
|
; This option is not documented yet as its semantics will change.
|
|
fgraphite
|
|
Common Var(flag_graphite) Optimization
|
|
Enable in and out of Graphite representation.
|
|
|
|
fgraphite-identity
|
|
Common Var(flag_graphite_identity) Optimization
|
|
Enable Graphite Identity transformation.
|
|
|
|
fhoist-adjacent-loads
|
|
Common Var(flag_hoist_adjacent_loads) Optimization
|
|
Enable hoisting adjacent loads to encourage generating conditional move
|
|
instructions.
|
|
|
|
fkeep-gc-roots-live
|
|
Common Undocumented Var(flag_keep_gc_roots_live) Optimization
|
|
; Always keep a pointer to a live memory block
|
|
|
|
flarge-source-files
|
|
Common Var(flag_large_source_files) Init(0)
|
|
Improve GCC's ability to track column numbers in large source files,
|
|
at the expense of slower compilation.
|
|
|
|
floop-parallelize-all
|
|
Common Var(flag_loop_parallelize_all) Optimization
|
|
Mark all loops as parallel.
|
|
|
|
floop-strip-mine
|
|
Common Alias(floop-nest-optimize)
|
|
Enable loop nest transforms. Same as -floop-nest-optimize.
|
|
|
|
floop-interchange
|
|
Common Var(flag_loop_interchange) Optimization
|
|
Enable loop interchange on trees.
|
|
|
|
floop-block
|
|
Common Alias(floop-nest-optimize)
|
|
Enable loop nest transforms. Same as -floop-nest-optimize.
|
|
|
|
floop-unroll-and-jam
|
|
Common Var(flag_unroll_jam) Optimization
|
|
Perform unroll-and-jam on loops.
|
|
|
|
fgnu-tm
|
|
Common Var(flag_tm)
|
|
Enable support for GNU transactional memory.
|
|
|
|
fgnu-unique
|
|
Common Var(flag_gnu_unique) Init(1)
|
|
Use STB_GNU_UNIQUE if supported by the assembler.
|
|
|
|
floop-flatten
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
floop-nest-optimize
|
|
Common Var(flag_loop_nest_optimize) Optimization
|
|
Enable the loop nest optimizer.
|
|
|
|
fstrict-volatile-bitfields
|
|
Common Var(flag_strict_volatile_bitfields) Init(-1) Optimization
|
|
Force bitfield accesses to match their type width.
|
|
|
|
fstore-merging
|
|
Common Var(flag_store_merging) Optimization
|
|
Merge adjacent stores.
|
|
|
|
fguess-branch-probability
|
|
Common Var(flag_guess_branch_prob) Optimization
|
|
Enable guessing of branch probabilities.
|
|
|
|
fharden-compares
|
|
Common Var(flag_harden_compares) Optimization
|
|
Harden conditionals not used in branches, checking reversed conditions.
|
|
|
|
fharden-conditional-branches
|
|
Common Var(flag_harden_conditional_branches) Optimization
|
|
Harden conditional branches by checking reversed conditions.
|
|
|
|
; 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 Var(flag_no_ident,0)
|
|
Process #ident directives.
|
|
|
|
fif-conversion
|
|
Common Var(flag_if_conversion) Optimization
|
|
Perform conversion of conditional jumps to branchless equivalents.
|
|
|
|
fif-conversion2
|
|
Common 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) Optimization
|
|
-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 Var(flag_tree_loop_if_convert) Init(-1) Optimization
|
|
Convert conditional jumps in innermost loops to branchless equivalents.
|
|
|
|
ftree-loop-if-convert-stores
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
; -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 Var(flag_inhibit_size_directive)
|
|
Do not generate .size directives.
|
|
|
|
findirect-inlining
|
|
Common Var(flag_indirect_inlining) Optimization
|
|
Perform indirect inlining.
|
|
|
|
; General flag to enable inlining. Specifying -fno-inline will disable
|
|
; all inlining apart from always-inline functions.
|
|
finline
|
|
Common Var(flag_no_inline,0) Init(0) Optimization
|
|
Enable inlining of function declared \"inline\", disabling disables all inlining.
|
|
|
|
finline-small-functions
|
|
Common Var(flag_inline_small_functions) Optimization
|
|
Integrate functions into their callers when code size is known not to grow.
|
|
|
|
finline-functions
|
|
Common Var(flag_inline_functions) Optimization
|
|
Integrate functions not declared \"inline\" into their callers when profitable.
|
|
|
|
finline-functions-called-once
|
|
Common 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=<number> Limit the size of inlined functions to <number>.
|
|
|
|
finline-atomics
|
|
Common Var(flag_inline_atomics) Init(1) Optimization
|
|
Inline __atomic operations when a lock free instruction sequence is available.
|
|
|
|
fcf-protection
|
|
Common RejectNegative Alias(fcf-protection=,full)
|
|
|
|
fcf-protection=
|
|
Common Joined RejectNegative Enum(cf_protection_level) Var(flag_cf_protection) Init(CF_NONE)
|
|
-fcf-protection=[full|branch|return|none|check] Instrument functions with checks to verify jump/call/return control-flow transfer
|
|
instructions have valid targets.
|
|
|
|
Enum
|
|
Name(cf_protection_level) Type(enum cf_protection_level) UnknownError(unknown Control-Flow Protection Level %qs)
|
|
|
|
EnumValue
|
|
Enum(cf_protection_level) String(full) Value(CF_FULL)
|
|
|
|
EnumValue
|
|
Enum(cf_protection_level) String(branch) Value(CF_BRANCH)
|
|
|
|
EnumValue
|
|
Enum(cf_protection_level) String(return) Value(CF_RETURN)
|
|
|
|
EnumValue
|
|
Enum(cf_protection_level) String(check) Value(CF_CHECK)
|
|
|
|
EnumValue
|
|
Enum(cf_protection_level) String(none) Value(CF_NONE)
|
|
|
|
finstrument-functions
|
|
Common 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 Var(flag_ipa_cp) Optimization
|
|
Perform interprocedural constant propagation.
|
|
|
|
fipa-cp-clone
|
|
Common Var(flag_ipa_cp_clone) Optimization
|
|
Perform cloning to make Interprocedural constant propagation stronger.
|
|
|
|
fipa-cp-alignment
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
fipa-bit-cp
|
|
Common Var(flag_ipa_bit_cp) Optimization
|
|
Perform interprocedural bitwise constant propagation.
|
|
|
|
fipa-modref
|
|
Common Var(flag_ipa_modref) Optimization
|
|
Perform interprocedural modref analysis.
|
|
|
|
fipa-profile
|
|
Common Var(flag_ipa_profile) Init(0) Optimization
|
|
Perform interprocedural profile propagation.
|
|
|
|
fipa-pta
|
|
Common Var(flag_ipa_pta) Init(0) Optimization
|
|
Perform interprocedural points-to analysis.
|
|
|
|
fipa-pure-const
|
|
Common Var(flag_ipa_pure_const) Init(0) Optimization
|
|
Discover pure and const functions.
|
|
|
|
fipa-icf
|
|
Common Var(flag_ipa_icf) Optimization
|
|
Perform Identical Code Folding for functions and read-only variables.
|
|
|
|
fipa-icf-functions
|
|
Common Var(flag_ipa_icf_functions) Optimization
|
|
Perform Identical Code Folding for functions.
|
|
|
|
fipa-icf-variables
|
|
Common Var(flag_ipa_icf_variables) Optimization
|
|
Perform Identical Code Folding for variables.
|
|
|
|
fipa-reference
|
|
Common Var(flag_ipa_reference) Init(0) Optimization
|
|
Discover read-only and non addressable static variables.
|
|
|
|
fipa-reference-addressable
|
|
Common Var(flag_ipa_reference_addressable) Init(0) Optimization
|
|
Discover read-only, write-only and non-addressable static variables.
|
|
|
|
fipa-stack-alignment
|
|
Common Var(flag_ipa_stack_alignment) Init(1) Optimization
|
|
Reduce stack alignment on call sites if possible.
|
|
|
|
fipa-matrix-reorg
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
fipa-struct-reorg
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
fipa-vrp
|
|
Common Var(flag_ipa_vrp) Optimization
|
|
Perform IPA Value Range Propagation.
|
|
|
|
fira-algorithm=
|
|
Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) Optimization
|
|
-fira-algorithm=[CB|priority] Set the used IRA algorithm.
|
|
|
|
fipa-strict-aliasing
|
|
Common Var(flag_ipa_strict_aliasing) Init(1) Optimization
|
|
Assume strict aliasing rules apply across (uninlined) function boundaries.
|
|
|
|
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_ONE) Optimization
|
|
-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 Var(flag_ira_hoist_pressure) Init(1) Optimization
|
|
Use IRA based register pressure calculation
|
|
in RTL hoist optimizations.
|
|
|
|
fira-loop-pressure
|
|
Common Var(flag_ira_loop_pressure) Optimization
|
|
Use IRA based register pressure calculation
|
|
in RTL loop optimizations.
|
|
|
|
fira-share-save-slots
|
|
Common Var(flag_ira_share_save_slots) Init(1) Optimization
|
|
Share slots for saving different hard registers.
|
|
|
|
fira-share-spill-slots
|
|
Common Var(flag_ira_share_spill_slots) Init(1) Optimization
|
|
Share stack slots for spilled pseudo-registers.
|
|
|
|
fira-verbose=
|
|
Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5)
|
|
-fira-verbose=<number> Control IRA's level of diagnostic messages.
|
|
|
|
fivopts
|
|
Common 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.
|
|
|
|
fbit-tests
|
|
Common Var(flag_bit_tests) Init(1) Optimization
|
|
Use bit tests for sufficiently large switch statements.
|
|
|
|
fkeep-inline-functions
|
|
Common Var(flag_keep_inline_functions)
|
|
Generate code for functions even if they are fully inlined.
|
|
|
|
fkeep-static-functions
|
|
Common Var(flag_keep_static_functions)
|
|
Generate code for static functions even if they are never called.
|
|
|
|
fkeep-static-consts
|
|
Common Var(flag_keep_static_consts) Init(1)
|
|
Emit static const variables even if they are not used.
|
|
|
|
fleading-underscore
|
|
Common Var(flag_leading_underscore) Init(-1)
|
|
Give external symbols a leading underscore.
|
|
|
|
floop-optimize
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
flra-remat
|
|
Common Var(flag_lra_remat) Optimization
|
|
Do CFG-sensitive rematerialization in LRA.
|
|
|
|
flto
|
|
Common
|
|
Enable link-time optimization.
|
|
|
|
flto=
|
|
Common RejectNegative Joined Var(flag_lto)
|
|
Link-time optimization with number of parallel jobs or jobserver.
|
|
|
|
Enum
|
|
Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs)
|
|
|
|
EnumValue
|
|
Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE)
|
|
|
|
EnumValue
|
|
Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE)
|
|
|
|
EnumValue
|
|
Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED)
|
|
|
|
EnumValue
|
|
Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1)
|
|
|
|
EnumValue
|
|
Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX)
|
|
|
|
flto-partition=
|
|
Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED)
|
|
Specify the algorithm to partition symbols and vars at linktime.
|
|
|
|
; 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) IntegerRange(0, 19)
|
|
-flto-compression-level=<number> Use zlib/zstd compression level <number> for IL.
|
|
|
|
flto-odr-type-merging
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
flto-report
|
|
Common Var(flag_lto_report) Init(0)
|
|
Report various link-time optimization statistics.
|
|
|
|
flto-report-wpa
|
|
Common Var(flag_lto_report_wpa) Init(0)
|
|
Report various link-time optimization statistics for WPA only.
|
|
|
|
fmath-errno
|
|
Common 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=<number> Maximum number of errors to report.
|
|
|
|
fmem-report
|
|
Common Var(mem_report)
|
|
Report on permanent memory allocation.
|
|
|
|
fmem-report-wpa
|
|
Common 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 Var(flag_merge_constants,2) Init(1)
|
|
Attempt to merge identical constants and constant variables.
|
|
|
|
fmerge-constants
|
|
Common Var(flag_merge_constants,1)
|
|
Attempt to merge identical constants across compilation units.
|
|
|
|
fmerge-debug-strings
|
|
Common Var(flag_merge_debug_strings) Init(1)
|
|
Attempt to merge identical debug strings across compilation units.
|
|
|
|
fmessage-length=
|
|
Common RejectNegative Joined UInteger
|
|
-fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping.
|
|
|
|
fmodulo-sched
|
|
Common Var(flag_modulo_sched) Optimization
|
|
Perform SMS based modulo scheduling before the first scheduling pass.
|
|
|
|
fmodulo-sched-allow-regmoves
|
|
Common Var(flag_modulo_sched_allow_regmoves) Optimization
|
|
Perform SMS based modulo scheduling with register moves allowed.
|
|
|
|
fmove-loop-invariants
|
|
Common Var(flag_move_loop_invariants) Optimization
|
|
Move loop invariant computations out of loops.
|
|
|
|
fmove-loop-stores
|
|
Common Var(flag_move_loop_stores) Optimization
|
|
Move stores out of loops.
|
|
|
|
fdce
|
|
Common Var(flag_dce) Init(1) Optimization
|
|
Use the RTL dead code elimination pass.
|
|
|
|
fdse
|
|
Common Var(flag_dse) Init(0) Optimization
|
|
Use the RTL dead store elimination pass.
|
|
|
|
freschedule-modulo-scheduled-loops
|
|
Common Var(flag_resched_modulo_sched) Optimization
|
|
Enable/Disable the traditional scheduling in loops that already passed modulo scheduling.
|
|
|
|
fnon-call-exceptions
|
|
Common Var(flag_non_call_exceptions) Optimization
|
|
Support synchronous non-call exceptions.
|
|
|
|
foffload=
|
|
Driver Joined MissingArgError(targets missing after %qs)
|
|
|
|
foffload-options=
|
|
Common Driver Joined MissingArgError(options or targets=options missing after %qs)
|
|
-foffload-options=<targets>=<options> Specify options for the offloading targets.
|
|
|
|
foffload-abi=
|
|
Common Joined RejectNegative Enum(offload_abi)
|
|
-foffload-abi=[lp64|ilp32] Set the ABI to use in an offload compiler.
|
|
|
|
Enum
|
|
Name(offload_abi) Type(enum offload_abi) UnknownError(unknown offload ABI %qs)
|
|
|
|
EnumValue
|
|
Enum(offload_abi) String(ilp32) Value(OFFLOAD_ABI_ILP32)
|
|
|
|
EnumValue
|
|
Enum(offload_abi) String(lp64) Value(OFFLOAD_ABI_LP64)
|
|
|
|
fomit-frame-pointer
|
|
Common Var(flag_omit_frame_pointer) Optimization
|
|
When possible do not generate stack frames.
|
|
|
|
fopt-info
|
|
Common Var(flag_opt_info) Optimization
|
|
Enable all optimization info dumps on stderr.
|
|
|
|
fopt-info-
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fopt-info[-<type>=filename] Dump compiler optimization details.
|
|
|
|
fsave-optimization-record
|
|
Common Var(flag_save_optimization_record) Optimization
|
|
Write a SRCFILE.opt-record.json file detailing what optimizations were performed.
|
|
|
|
foptimize-register-move
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
foptimize-sibling-calls
|
|
Common Var(flag_optimize_sibling_calls) Optimization
|
|
Optimize sibling and tail recursive calls.
|
|
|
|
fpartial-inlining
|
|
Common Var(flag_partial_inlining) Optimization
|
|
Perform partial inlining.
|
|
|
|
fpre-ipa-mem-report
|
|
Common Var(pre_ipa_mem_report)
|
|
Report on memory allocation before interprocedural optimization.
|
|
|
|
fpost-ipa-mem-report
|
|
Common Var(post_ipa_mem_report)
|
|
Report on memory allocation before interprocedural optimization.
|
|
|
|
fpack-struct
|
|
Common Var(flag_pack_struct) Optimization
|
|
Pack structure members together without holes.
|
|
|
|
fpack-struct=
|
|
Common RejectNegative Joined UInteger Optimization
|
|
-fpack-struct=<number> Set initial maximum structure member alignment.
|
|
|
|
fpcc-struct-return
|
|
Common Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN)
|
|
Return small aggregates in memory, not registers.
|
|
|
|
fpeel-loops
|
|
Common Var(flag_peel_loops) Optimization
|
|
Perform loop peeling.
|
|
|
|
fpeephole
|
|
Common Var(flag_no_peephole,0) Optimization
|
|
Enable machine specific peephole optimizations.
|
|
|
|
fpeephole2
|
|
Common Var(flag_peephole2) Optimization
|
|
Enable an RTL peephole pass before sched2.
|
|
|
|
fPIC
|
|
Common Var(flag_pic,2) Negative(fPIE) Init(-1)
|
|
Generate position-independent code if possible (large mode).
|
|
|
|
fPIE
|
|
Common Var(flag_pie,2) Negative(fpic) Init(-1)
|
|
Generate position-independent code for executables if possible (large mode).
|
|
|
|
fpic
|
|
Common Var(flag_pic,1) Negative(fpie) Init(-1)
|
|
Generate position-independent code if possible (small mode).
|
|
|
|
fpie
|
|
Common Var(flag_pie,1) Negative(fPIC) Init(-1)
|
|
Generate position-independent code for executables if possible (small mode).
|
|
|
|
fplt
|
|
Common Var(flag_plt) Init(1) Optimization
|
|
Use PLT for PIC calls (-fno-plt: load the address from GOT at call site).
|
|
|
|
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-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name>.
|
|
|
|
fpredictive-commoning
|
|
Common Var(flag_predictive_commoning) Optimization
|
|
Run predictive commoning optimization.
|
|
|
|
fprefetch-loop-arrays
|
|
Common Var(flag_prefetch_loop_arrays) Init(-1) Optimization
|
|
Generate prefetch instructions, if available, for arrays in loops.
|
|
|
|
fprofile
|
|
Common Var(profile_flag)
|
|
Enable basic program profiling code.
|
|
|
|
fprofile-abs-path
|
|
Common Var(profile_abs_path_flag)
|
|
Generate absolute source path names for gcov.
|
|
|
|
fprofile-arcs
|
|
Common 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-note=
|
|
Common Joined RejectNegative Var(profile_note_location)
|
|
Select the name for storing the profile note file.
|
|
|
|
fprofile-correction
|
|
Common Var(flag_profile_correction)
|
|
Enable correction of flow inconsistent profile data input.
|
|
|
|
fprofile-update=
|
|
Common Joined RejectNegative Enum(profile_update) Var(flag_profile_update) Init(PROFILE_UPDATE_SINGLE)
|
|
-fprofile-update=[single|atomic|prefer-atomic] Set the profile update method.
|
|
|
|
fprofile-filter-files=
|
|
Common Joined RejectNegative Var(flag_profile_filter_files)
|
|
Instrument only functions from files whose name matches any of the regular expressions (separated by semi-colons).
|
|
|
|
fprofile-exclude-files=
|
|
Common Joined RejectNegative Var(flag_profile_exclude_files)
|
|
Instrument only functions from files whose name does not match any of the regular expressions (separated by semi-colons).
|
|
|
|
Enum
|
|
Name(profile_reproducibility) Type(enum profile_reproducibility) UnknownError(unknown profile reproducibility method %qs)
|
|
|
|
EnumValue
|
|
Enum(profile_reproducibility) String(serial) Value(PROFILE_REPRODUCIBILITY_SERIAL)
|
|
|
|
EnumValue
|
|
Enum(profile_reproducibility) String(parallel-runs) Value(PROFILE_REPRODUCIBILITY_PARALLEL_RUNS)
|
|
|
|
EnumValue
|
|
Enum(profile_reproducibility) String(multithreaded) Value(PROFILE_REPRODUCIBILITY_MULTITHREADED)
|
|
|
|
fprofile-reproducible=
|
|
Common Joined RejectNegative Var(flag_profile_reproducible) Enum(profile_reproducibility) Init(PROFILE_REPRODUCIBILITY_SERIAL)
|
|
-fprofile-reproducible=[serial|parallel-runs|multithreaded] Control level of reproducibility of profile gathered by -fprofile-generate.
|
|
|
|
Enum
|
|
Name(profile_update) Type(enum profile_update) UnknownError(unknown profile update method %qs)
|
|
|
|
EnumValue
|
|
Enum(profile_update) String(single) Value(PROFILE_UPDATE_SINGLE)
|
|
|
|
EnumValue
|
|
Enum(profile_update) String(atomic) Value(PROFILE_UPDATE_ATOMIC)
|
|
|
|
EnumValue
|
|
Enum(profile_update) String(prefer-atomic) Value(PROFILE_UPDATE_PREFER_ATOMIC)
|
|
|
|
fprofile-prefix-path=
|
|
Common Joined RejectNegative Var(profile_prefix_path)
|
|
Remove prefix from absolute path before mangling name for -fprofile-generate= and -fprofile-use=.
|
|
|
|
fprofile-prefix-map=
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-fprofile-prefix-map=<old>=<new> Map one directory name to another in GCOV coverage result.
|
|
|
|
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-info-section
|
|
Common RejectNegative
|
|
Register the profile information in the .gcov_info section instead of using a constructor/destructor.
|
|
|
|
fprofile-info-section=
|
|
Common Joined RejectNegative Var(profile_info_section)
|
|
Register the profile information in the specified section instead of using a constructor/destructor.
|
|
|
|
fprofile-partial-training
|
|
Common Var(flag_profile_partial_training) Optimization
|
|
Do not assume that functions never executed during the train run are cold.
|
|
|
|
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 Var(flag_profile_values)
|
|
Insert code to profile values of expressions.
|
|
|
|
fprofile-report
|
|
Common Var(profile_report)
|
|
Report on consistency of profile.
|
|
|
|
fprofile-reorder-functions
|
|
Common Var(flag_profile_reorder_functions) Optimization
|
|
Enable function reordering that improves code placement.
|
|
|
|
fpatchable-function-entry=
|
|
Common Var(flag_patchable_function_entry) Joined Optimization
|
|
Insert NOP instructions at each function entry.
|
|
|
|
frandom-seed
|
|
Common Var(common_deferred_options) Defer
|
|
|
|
frandom-seed=
|
|
Common Joined RejectNegative Var(common_deferred_options) Defer
|
|
-frandom-seed=<string> Make compile reproducible using <string>.
|
|
|
|
; 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 Var(flag_record_gcc_switches)
|
|
Record gcc command line switches in the object file.
|
|
|
|
freg-struct-return
|
|
Common Var(flag_pcc_struct_return,0) Optimization
|
|
Return small aggregates in registers.
|
|
|
|
fregmove
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
flifetime-dse
|
|
Common Var(flag_lifetime_dse,2) Init(2) Optimization
|
|
Tell DSE that the storage for a C++ object is dead when the constructor
|
|
starts and when the destructor finishes.
|
|
|
|
flifetime-dse=
|
|
Common Joined RejectNegative UInteger Var(flag_lifetime_dse) Optimization IntegerRange(0, 2)
|
|
|
|
flive-patching
|
|
Common RejectNegative Alias(flive-patching=,inline-clone) Optimization
|
|
|
|
flive-patching=
|
|
Common Joined RejectNegative Enum(live_patching_level) Var(flag_live_patching) Init(LIVE_PATCHING_NONE) Optimization
|
|
-flive-patching=[inline-only-static|inline-clone] Control IPA
|
|
optimizations to provide a safe compilation for live-patching. At the same
|
|
time, provides multiple-level control on the enabled IPA optimizations.
|
|
|
|
Enum
|
|
Name(live_patching_level) Type(enum live_patching_level) UnknownError(unknown Live-Patching Level %qs)
|
|
|
|
EnumValue
|
|
Enum(live_patching_level) String(inline-only-static) Value(LIVE_PATCHING_INLINE_ONLY_STATIC)
|
|
|
|
EnumValue
|
|
Enum(live_patching_level) String(inline-clone) Value(LIVE_PATCHING_INLINE_CLONE)
|
|
|
|
fallocation-dce
|
|
Common Var(flag_allocation_dce) Init(1) Optimization
|
|
Tell DCE to remove unused C++ allocations.
|
|
|
|
flive-range-shrinkage
|
|
Common Var(flag_live_range_shrinkage) Init(0) Optimization
|
|
Relief of register pressure through live range shrinkage.
|
|
|
|
frename-registers
|
|
Common Var(flag_rename_registers) Optimization EnabledBy(funroll-loops)
|
|
Perform a register renaming optimization pass.
|
|
|
|
fschedule-fusion
|
|
Common Var(flag_schedule_fusion) Init(2) Optimization
|
|
Perform a target dependent instruction fusion optimization pass.
|
|
|
|
freorder-blocks
|
|
Common Var(flag_reorder_blocks) Optimization
|
|
Reorder basic blocks to improve code placement.
|
|
|
|
freorder-blocks-algorithm=
|
|
Common Joined RejectNegative Enum(reorder_blocks_algorithm) Var(flag_reorder_blocks_algorithm) Init(REORDER_BLOCKS_ALGORITHM_SIMPLE) Optimization
|
|
-freorder-blocks-algorithm=[simple|stc] Set the used basic block reordering algorithm.
|
|
|
|
Enum
|
|
Name(reorder_blocks_algorithm) Type(enum reorder_blocks_algorithm) UnknownError(unknown basic block reordering algorithm %qs)
|
|
|
|
EnumValue
|
|
Enum(reorder_blocks_algorithm) String(simple) Value(REORDER_BLOCKS_ALGORITHM_SIMPLE)
|
|
|
|
EnumValue
|
|
Enum(reorder_blocks_algorithm) String(stc) Value(REORDER_BLOCKS_ALGORITHM_STC)
|
|
|
|
freorder-blocks-and-partition
|
|
Common Var(flag_reorder_blocks_and_partition) Optimization
|
|
Reorder basic blocks and partition into hot and cold sections.
|
|
|
|
freorder-functions
|
|
Common Var(flag_reorder_functions) Optimization
|
|
Reorder functions to improve code placement.
|
|
|
|
frerun-cse-after-loop
|
|
Common 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 Var(flag_rounding_math) Optimization SetByCombined
|
|
Disable optimizations that assume default FP rounding behavior.
|
|
|
|
fsched-interblock
|
|
Common Var(flag_schedule_interblock) Init(1) Optimization
|
|
Enable scheduling across basic blocks.
|
|
|
|
fsched-pressure
|
|
Common Var(flag_sched_pressure) Init(0) Optimization
|
|
Enable register pressure sensitive insn scheduling.
|
|
|
|
fsched-spec
|
|
Common Var(flag_schedule_speculative) Init(1) Optimization
|
|
Allow speculative motion of non-loads.
|
|
|
|
fsched-spec-load
|
|
Common Var(flag_schedule_speculative_load) Optimization
|
|
Allow speculative motion of some loads.
|
|
|
|
fsched-spec-load-dangerous
|
|
Common Var(flag_schedule_speculative_load_dangerous) Optimization
|
|
Allow speculative motion of more loads.
|
|
|
|
fsched-verbose=
|
|
Common RejectNegative Joined UInteger Var(sched_verbose_param) Init(1)
|
|
-fsched-verbose=<number> Set the verbosity level of the scheduler.
|
|
|
|
fsched2-use-superblocks
|
|
Common 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 Var(flag_schedule_insns) Optimization
|
|
Reschedule instructions before register allocation.
|
|
|
|
fschedule-insns2
|
|
Common 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 Var(flag_selective_scheduling) Optimization
|
|
Schedule instructions using selective scheduling algorithm.
|
|
|
|
fselective-scheduling2
|
|
Common Var(flag_selective_scheduling2) Optimization
|
|
Run selective scheduling after reload.
|
|
|
|
fself-test=
|
|
Common Undocumented Joined Var(flag_self_test)
|
|
Run self-tests, using the given path to locate test files.
|
|
|
|
fsel-sched-pipelining
|
|
Common Var(flag_sel_sched_pipelining) Init(0) Optimization
|
|
Perform software pipelining of inner loops during selective scheduling.
|
|
|
|
fsel-sched-pipelining-outer-loops
|
|
Common Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization
|
|
Perform software pipelining of outer loops during selective scheduling.
|
|
|
|
fsel-sched-reschedule-pipelined
|
|
Common Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization
|
|
Reschedule pipelined regions without pipelining.
|
|
|
|
fsemantic-interposition
|
|
Common Var(flag_semantic_interposition) Init(1) Optimization
|
|
Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker.
|
|
|
|
; sched_stalled_insns means that insns can be moved prematurely from the queue
|
|
; of stalled insns into the ready list.
|
|
fsched-stalled-insns
|
|
Common Var(flag_sched_stalled_insns) Optimization UInteger
|
|
Allow premature scheduling of queued insns.
|
|
|
|
fsched-stalled-insns=
|
|
Common RejectNegative Joined UInteger Optimization
|
|
-fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled.
|
|
|
|
; sched_stalled_insns_dep controls how many recently scheduled cycles will
|
|
; be examined for a dependency on a stalled insn that is candidate for
|
|
; premature removal from the queue of stalled insns into the ready list (has
|
|
; an effect only if the flag 'sched_stalled_insns' is set).
|
|
fsched-stalled-insns-dep
|
|
Common 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 Optimization
|
|
-fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns.
|
|
|
|
fsched-group-heuristic
|
|
Common Var(flag_sched_group_heuristic) Init(1) Optimization
|
|
Enable the group heuristic in the scheduler.
|
|
|
|
fsched-critical-path-heuristic
|
|
Common Var(flag_sched_critical_path_heuristic) Init(1) Optimization
|
|
Enable the critical path heuristic in the scheduler.
|
|
|
|
fsched-spec-insn-heuristic
|
|
Common Var(flag_sched_spec_insn_heuristic) Init(1) Optimization
|
|
Enable the speculative instruction heuristic in the scheduler.
|
|
|
|
fsched-rank-heuristic
|
|
Common Var(flag_sched_rank_heuristic) Init(1) Optimization
|
|
Enable the rank heuristic in the scheduler.
|
|
|
|
fsched-last-insn-heuristic
|
|
Common Var(flag_sched_last_insn_heuristic) Init(1) Optimization
|
|
Enable the last instruction heuristic in the scheduler.
|
|
|
|
fsched-dep-count-heuristic
|
|
Common Var(flag_sched_dep_count_heuristic) Init(1) Optimization
|
|
Enable the dependent count heuristic in the scheduler.
|
|
|
|
fsection-anchors
|
|
Common 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 Var(flag_ree) Init(0) Optimization
|
|
Turn on Redundant Extensions Elimination pass.
|
|
|
|
fshow-column
|
|
Common Var(flag_show_column) Init(1)
|
|
Show column numbers in diagnostics, when available. Default on.
|
|
|
|
fshrink-wrap
|
|
Common 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.
|
|
|
|
fshrink-wrap-separate
|
|
Common Var(flag_shrink_wrap_separate) Init(1) Optimization
|
|
Shrink-wrap parts of the prologue and epilogue separately.
|
|
|
|
fsignaling-nans
|
|
Common Var(flag_signaling_nans) Optimization SetByCombined
|
|
Disable optimizations observable by IEEE signaling NaNs.
|
|
|
|
fsigned-zeros
|
|
Common Var(flag_signed_zeros) Init(1) Optimization SetByCombined
|
|
Disable floating point optimizations that ignore the IEEE signedness of zero.
|
|
|
|
fsingle-precision-constant
|
|
Common Var(flag_single_precision_constant) Optimization
|
|
Convert floating point constants to single precision constants.
|
|
|
|
fsplit-ivs-in-unroller
|
|
Common Var(flag_split_ivs_in_unroller) Init(1) Optimization
|
|
Split lifetimes of induction variables when loops are unrolled.
|
|
|
|
fsplit-stack
|
|
Common Var(flag_split_stack) Init(-1)
|
|
Generate discontiguous stack frames.
|
|
|
|
fsplit-wide-types
|
|
Common Var(flag_split_wide_types) Optimization
|
|
Split wide types into independent registers.
|
|
|
|
fsplit-wide-types-early
|
|
Common Var(flag_split_wide_types_early) Optimization
|
|
Split wide types into independent registers earlier.
|
|
|
|
fssa-backprop
|
|
Common Var(flag_ssa_backprop) Init(1) Optimization
|
|
Enable backward propagation of use properties at the SSA level.
|
|
|
|
fssa-phiopt
|
|
Common Var(flag_ssa_phiopt) Optimization
|
|
Optimize conditional patterns using SSA PHI nodes.
|
|
|
|
fstdarg-opt
|
|
Common Var(flag_stdarg_opt) Init(1) Optimization
|
|
Optimize amount of stdarg registers saved to stack at start of function.
|
|
|
|
fvariable-expansion-in-unroller
|
|
Common Var(flag_variable_expansion_in_unroller) Optimization
|
|
Apply variable expansion when loops are unrolled.
|
|
|
|
fstack-check=
|
|
Common RejectNegative Joined Optimization
|
|
-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-clash-protection
|
|
Common Var(flag_stack_clash_protection) Optimization
|
|
Insert code to probe each page of stack space as it is allocated to protect
|
|
from stack-clash style attacks.
|
|
|
|
fstack-limit
|
|
Common Var(common_deferred_options) Defer
|
|
|
|
fstack-limit-register=
|
|
Common RejectNegative Joined Var(common_deferred_options) Defer
|
|
-fstack-limit-register=<register> Trap if the stack goes past <register>.
|
|
|
|
fstack-limit-symbol=
|
|
Common RejectNegative Joined Var(common_deferred_options) Defer
|
|
-fstack-limit-symbol=<name> Trap if the stack goes past symbol <name>.
|
|
|
|
fstack-protector
|
|
Common Var(flag_stack_protect, 1) Init(-1) Optimization
|
|
Use propolice as a stack protection method.
|
|
|
|
fstack-protector-all
|
|
Common RejectNegative Var(flag_stack_protect, 2) Init(-1) Optimization
|
|
Use a stack protection method for every function.
|
|
|
|
fstack-protector-strong
|
|
Common RejectNegative Var(flag_stack_protect, 3) Init(-1) Optimization
|
|
Use a smart stack protection method for certain functions.
|
|
|
|
fstack-protector-explicit
|
|
Common RejectNegative Var(flag_stack_protect, 4) Optimization
|
|
Use stack protection method only for functions with the stack_protect attribute.
|
|
|
|
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 Var(flag_strict_aliasing) Optimization
|
|
Assume strict aliasing rules apply.
|
|
|
|
fstrict-overflow
|
|
Common
|
|
Treat signed overflow as undefined. Negated as -fwrapv -fwrapv-pointer.
|
|
|
|
fsync-libcalls
|
|
Common Var(flag_sync_libcalls) Init(1)
|
|
Implement __atomic operations via libcalls to legacy __sync functions.
|
|
|
|
fsyntax-only
|
|
Common Var(flag_syntax_only)
|
|
Check for syntax errors, then stop.
|
|
|
|
ftest-coverage
|
|
Common Var(flag_test_coverage)
|
|
Create data files needed by \"gcov\".
|
|
|
|
fthread-jumps
|
|
Common Var(flag_thread_jumps) Optimization
|
|
Perform jump threading optimizations.
|
|
|
|
ftime-report
|
|
Common Var(time_report)
|
|
Report the time taken by each compiler pass.
|
|
|
|
ftime-report-details
|
|
Common Var(time_report_details)
|
|
Record times taken by sub-phases separately.
|
|
|
|
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 Var(flag_toplevel_reorder) Init(2) Optimization
|
|
Reorder top level functions, variables, and asms.
|
|
|
|
ftracer
|
|
Common Var(flag_tracer) Optimization
|
|
Perform superblock formation via tail duplication.
|
|
|
|
ftrampolines
|
|
Common Var(flag_trampolines) Init(0)
|
|
For targets that normally need trampolines for nested functions, always
|
|
generate them instead of using descriptors.
|
|
|
|
; 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 Var(flag_trapping_math) Init(1) Optimization SetByCombined
|
|
Assume floating-point operations can trap.
|
|
|
|
ftrapv
|
|
Common Var(flag_trapv) Optimization
|
|
Trap for signed overflow in addition, subtraction and multiplication.
|
|
|
|
ftree-ccp
|
|
Common Var(flag_tree_ccp) Optimization
|
|
Enable SSA-CCP optimization on trees.
|
|
|
|
ftree-bit-ccp
|
|
Common 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 Var(flag_tree_ch) Optimization
|
|
Enable loop header copying on trees.
|
|
|
|
ftree-coalesce-inlined-vars
|
|
Common Ignore RejectNegative
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
ftree-coalesce-vars
|
|
Common Var(flag_tree_coalesce_vars) Optimization
|
|
Enable SSA coalescing of user variables.
|
|
|
|
ftree-copyrename
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
ftree-copy-prop
|
|
Common 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 Var(flag_tree_cselim) Optimization
|
|
Transform condition stores into unconditional ones.
|
|
|
|
ftree-switch-conversion
|
|
Common Var(flag_tree_switch_conversion) Optimization
|
|
Perform conversions of switch initializations.
|
|
|
|
ftree-dce
|
|
Common Var(flag_tree_dce) Optimization
|
|
Enable SSA dead code elimination optimization on trees.
|
|
|
|
ftree-dominator-opts
|
|
Common Var(flag_tree_dom) Optimization
|
|
Enable dominator optimizations.
|
|
|
|
ftree-tail-merge
|
|
Common Var(flag_tree_tail_merge) Optimization
|
|
Enable tail merging on trees.
|
|
|
|
ftree-dse
|
|
Common Var(flag_tree_dse) Optimization
|
|
Enable dead store elimination.
|
|
|
|
ftree-forwprop
|
|
Common Var(flag_tree_forwprop) Init(1) Optimization
|
|
Enable forward propagation on trees.
|
|
|
|
ftree-fre
|
|
Common Var(flag_tree_fre) Optimization
|
|
Enable Full Redundancy Elimination (FRE) on trees.
|
|
|
|
foptimize-strlen
|
|
Common Var(flag_optimize_strlen) Optimization
|
|
Enable string length optimizations on trees.
|
|
|
|
fisolate-erroneous-paths-dereference
|
|
Common Var(flag_isolate_erroneous_paths_dereference) Optimization
|
|
Detect paths that trigger erroneous or undefined behavior due to
|
|
dereferencing a null pointer. Isolate those paths from the main control
|
|
flow and turn the statement with erroneous or undefined behavior into a trap.
|
|
|
|
fisolate-erroneous-paths-attribute
|
|
Common Var(flag_isolate_erroneous_paths_attribute) Optimization
|
|
Detect paths that trigger erroneous or undefined behavior due to a null value
|
|
being used in a way forbidden by a returns_nonnull or nonnull
|
|
attribute. Isolate those paths from the main control flow and turn the
|
|
statement with erroneous or undefined behavior into a trap.
|
|
|
|
ftree-loop-distribution
|
|
Common Var(flag_tree_loop_distribution) Optimization
|
|
Enable loop distribution on trees.
|
|
|
|
ftree-loop-distribute-patterns
|
|
Common Var(flag_tree_loop_distribute_patterns) Optimization
|
|
Enable loop distribution for patterns transformed into a library call.
|
|
|
|
ftree-loop-im
|
|
Common Var(flag_tree_loop_im) Init(1) Optimization
|
|
Enable loop invariant motion on trees.
|
|
|
|
ftree-loop-linear
|
|
Common Alias(floop-nest-optimize)
|
|
Enable loop nest transforms. Same as -floop-nest-optimize.
|
|
|
|
ftree-loop-ivcanon
|
|
Common Var(flag_tree_loop_ivcanon) Init(1) Optimization
|
|
Create canonical induction variables in loops.
|
|
|
|
ftree-loop-optimize
|
|
Common Var(flag_tree_loop_optimize) Init(1) Optimization
|
|
Enable loop optimizations on tree level.
|
|
|
|
ftree-parallelize-loops=
|
|
Common Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) Optimization
|
|
-ftree-parallelize-loops=<number> Enable automatic parallelization of loops.
|
|
|
|
ftree-phiprop
|
|
Common Var(flag_tree_phiprop) Init(1) Optimization
|
|
Enable hoisting loads from conditional pointers.
|
|
|
|
ftree-pre
|
|
Common Var(flag_tree_pre) Optimization
|
|
Enable SSA-PRE optimization on trees.
|
|
|
|
ftree-partial-pre
|
|
Common Var(flag_tree_partial_pre) Optimization
|
|
In SSA-PRE optimization on trees, enable partial-partial redundancy elimination.
|
|
|
|
ftree-pta
|
|
Common Var(flag_tree_pta) Optimization
|
|
Perform function-local points-to analysis on trees.
|
|
|
|
ftree-reassoc
|
|
Common 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 Var(flag_tree_sink) Optimization
|
|
Enable SSA code sinking on trees.
|
|
|
|
ftree-slsr
|
|
Common Var(flag_tree_slsr) Optimization
|
|
Perform straight-line strength reduction.
|
|
|
|
ftree-sra
|
|
Common Var(flag_tree_sra) Optimization
|
|
Perform scalar replacement of aggregates.
|
|
|
|
ftree-ter
|
|
Common Var(flag_tree_ter) Optimization
|
|
Replace temporary expressions in the SSA->normal pass.
|
|
|
|
ftree-lrs
|
|
Common Var(flag_tree_live_range_split) Optimization
|
|
Perform live range splitting during the SSA->normal pass.
|
|
|
|
ftree-vrp
|
|
Common Var(flag_tree_vrp) Init(0) Optimization
|
|
Perform Value Range Propagation on trees.
|
|
|
|
fsplit-paths
|
|
Common Var(flag_split_paths) Init(0) Optimization
|
|
Split paths leading to loop backedges.
|
|
|
|
funconstrained-commons
|
|
Common Var(flag_unconstrained_commons) Optimization
|
|
Assume common declarations may be overridden with ones with a larger
|
|
trailing array.
|
|
|
|
funit-at-a-time
|
|
Common Var(flag_unit_at_a_time) Init(1)
|
|
Compile whole compilation unit at a time.
|
|
|
|
funroll-loops
|
|
Common Var(flag_unroll_loops) Optimization EnabledBy(funroll-all-loops)
|
|
Perform loop unrolling when iteration count is known.
|
|
|
|
funroll-all-loops
|
|
Common Var(flag_unroll_all_loops) Optimization
|
|
Perform loop unrolling for all loops.
|
|
|
|
funroll-completely-grow-size
|
|
Undocumented Var(flag_cunroll_grow_size) Optimization
|
|
; Internal undocumented flag, allow size growth during complete unrolling
|
|
|
|
; 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 Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
fassociative-math
|
|
Common Var(flag_associative_math) SetByCombined Optimization
|
|
Allow optimization for floating-point arithmetic which may change the
|
|
result of the operation due to rounding.
|
|
|
|
freciprocal-math
|
|
Common Var(flag_reciprocal_math) SetByCombined Optimization
|
|
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 Var(flag_unsafe_math_optimizations) Optimization SetByCombined
|
|
Allow math optimizations that may violate IEEE or ISO standards.
|
|
|
|
funswitch-loops
|
|
Common Var(flag_unswitch_loops) Optimization
|
|
Perform loop unswitching.
|
|
|
|
fsplit-loops
|
|
Common Var(flag_split_loops) Optimization
|
|
Perform loop splitting.
|
|
|
|
fversion-loops-for-strides
|
|
Common Var(flag_version_loops_for_strides) Optimization
|
|
Version loops based on whether indices have a stride of one.
|
|
|
|
funwind-tables
|
|
Common Var(flag_unwind_tables) Optimization
|
|
Just generate unwind tables for exception handling.
|
|
|
|
fuse-ld=bfd
|
|
Common Driver Negative(fuse-ld=gold)
|
|
Use the bfd linker instead of the default linker.
|
|
|
|
fuse-ld=gold
|
|
Common Driver Negative(fuse-ld=bfd)
|
|
Use the gold linker instead of the default linker.
|
|
|
|
fuse-ld=lld
|
|
Common Driver Negative(fuse-ld=lld)
|
|
Use the lld LLVM linker instead of the default linker.
|
|
|
|
fuse-ld=mold
|
|
Common Driver Negative(fuse-ld=mold)
|
|
Use the Modern linker (MOLD) linker instead of the default linker.
|
|
|
|
fuse-linker-plugin
|
|
Common Undocumented Var(flag_use_linker_plugin)
|
|
|
|
; 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.
|
|
fvar-tracking
|
|
Common Var(flag_var_tracking) PerFunction EnabledBy(fvar-tracking-uninit)
|
|
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.
|
|
fvar-tracking-assignments
|
|
Common Var(flag_var_tracking_assignments) PerFunction
|
|
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 Var(flag_var_tracking_assignments_toggle) PerFunction
|
|
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.
|
|
fvar-tracking-uninit
|
|
Common Var(flag_var_tracking_uninit) PerFunction
|
|
Perform variable tracking and also tag variables that are uninitialized.
|
|
|
|
; Alias to enable both -ftree-loop-vectorize and -ftree-slp-vectorize.
|
|
ftree-vectorize
|
|
Common Var(flag_tree_vectorize) Optimization
|
|
Enable vectorization on trees.
|
|
|
|
ftree-vectorizer-verbose=
|
|
Common Joined RejectNegative Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
ftree-loop-vectorize
|
|
Common Var(flag_tree_loop_vectorize) Optimization EnabledBy(ftree-vectorize)
|
|
Enable loop vectorization on trees.
|
|
|
|
ftree-slp-vectorize
|
|
Common Var(flag_tree_slp_vectorize) Optimization EnabledBy(ftree-vectorize)
|
|
Enable basic block vectorization (SLP) on trees.
|
|
|
|
fvect-cost-model=
|
|
Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT) Optimization
|
|
-fvect-cost-model=[unlimited|dynamic|cheap|very-cheap] Specifies the cost model for vectorization.
|
|
|
|
fsimd-cost-model=
|
|
Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED) Optimization
|
|
-fsimd-cost-model=[unlimited|dynamic|cheap|very-cheap] Specifies the vectorization cost model for code marked with a simd directive.
|
|
|
|
Enum
|
|
Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs)
|
|
|
|
EnumValue
|
|
Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED)
|
|
|
|
EnumValue
|
|
Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC)
|
|
|
|
EnumValue
|
|
Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP)
|
|
|
|
EnumValue
|
|
Enum(vect_cost_model) String(very-cheap) Value(VECT_COST_MODEL_VERY_CHEAP)
|
|
|
|
fvect-cost-model
|
|
Common Alias(fvect-cost-model=,dynamic,unlimited)
|
|
Enables the dynamic vectorizer cost model. Preserved for backward compatibility.
|
|
|
|
ftree-vect-loop-version
|
|
Common Ignore
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
ftree-scev-cprop
|
|
Common Var(flag_tree_scev_cprop) Init(1) Optimization
|
|
Enable copy propagation of scalar-evolution information.
|
|
|
|
ftrivial-auto-var-init=
|
|
Common Joined RejectNegative Enum(auto_init_type) Var(flag_auto_var_init) Init(AUTO_INIT_UNINITIALIZED) Optimization
|
|
-ftrivial-auto-var-init=[uninitialized|pattern|zero] Add initializations to automatic variables.
|
|
|
|
Enum
|
|
Name(auto_init_type) Type(enum auto_init_type) UnknownError(unrecognized automatic variable initialization type %qs)
|
|
|
|
EnumValue
|
|
Enum(auto_init_type) String(uninitialized) Value(AUTO_INIT_UNINITIALIZED)
|
|
|
|
EnumValue
|
|
Enum(auto_init_type) String(pattern) Value(AUTO_INIT_PATTERN)
|
|
|
|
EnumValue
|
|
Enum(auto_init_type) String(zero) Value(AUTO_INIT_ZERO)
|
|
|
|
; -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 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)
|
|
|
|
fvtable-verify=
|
|
Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY)
|
|
Validate vtable pointers before using them.
|
|
|
|
Enum
|
|
Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs)
|
|
|
|
EnumValue
|
|
Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY)
|
|
|
|
EnumValue
|
|
Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY)
|
|
|
|
EnumValue
|
|
Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY)
|
|
|
|
fvtv-counts
|
|
Common Var(flag_vtv_counts)
|
|
Output vtable verification counters.
|
|
|
|
fvtv-debug
|
|
Common Var(flag_vtv_debug)
|
|
Output vtable verification pointer sets information.
|
|
|
|
fvpt
|
|
Common Var(flag_value_profile_transformations) Optimization
|
|
Use expression value profiles in optimizations.
|
|
|
|
fweb
|
|
Common Var(flag_web) Optimization EnabledBy(funroll-loops)
|
|
Construct webs and split unrelated uses of single variable.
|
|
|
|
ftree-builtin-call-dce
|
|
Common Var(flag_tree_builtin_call_dce) Init(0) Optimization
|
|
Enable conditional dead code elimination for builtin calls.
|
|
|
|
fwhole-program
|
|
Common Var(flag_whole_program) Init(0)
|
|
Perform whole program optimizations.
|
|
|
|
fwrapv-pointer
|
|
Common Var(flag_wrapv_pointer) Optimization
|
|
Assume pointer overflow wraps around.
|
|
|
|
fwrapv
|
|
Common Var(flag_wrapv) Optimization
|
|
Assume signed arithmetic overflow wraps around.
|
|
|
|
fzero-initialized-in-bss
|
|
Common Var(flag_zero_initialized_in_bss) Init(1)
|
|
Put zero initialized data in the bss section.
|
|
|
|
fzero-call-used-regs=
|
|
Common RejectNegative Joined
|
|
Clear call-used registers upon function return.
|
|
|
|
g
|
|
Common Driver RejectNegative JoinedOrMissing
|
|
Generate debug information in default format.
|
|
|
|
gas-loc-support
|
|
Common Driver Var(dwarf2out_as_loc_support)
|
|
Assume assembler support for (DWARF2+) .loc directives.
|
|
|
|
gas-locview-support
|
|
Common Driver Var(dwarf2out_as_locview_support)
|
|
Assume assembler support for view in (DWARF2+) .loc directives.
|
|
|
|
gcoff
|
|
Common Driver WarnRemoved
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
gcoff1
|
|
Common Driver WarnRemoved
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
gcoff2
|
|
Common Driver WarnRemoved
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
gcoff3
|
|
Common Driver WarnRemoved
|
|
Does nothing. Preserved for backward compatibility.
|
|
|
|
gcolumn-info
|
|
Common Driver Var(debug_column_info,1) Init(1)
|
|
Record DW_AT_decl_column and DW_AT_call_column in DWARF.
|
|
|
|
; The CTF generation process feeds off DWARF dies. This option implicitly
|
|
; updates the debug_info_level to DINFO_LEVEL_NORMAL.
|
|
gctf
|
|
Common Driver RejectNegative JoinedOrMissing
|
|
Generate CTF debug information at default level.
|
|
|
|
gbtf
|
|
Common Driver RejectNegative JoinedOrMissing
|
|
Generate BTF debug information at default level.
|
|
|
|
gdwarf
|
|
Common Driver JoinedOrMissing Negative(gdwarf-)
|
|
Generate debug information in default version of DWARF format.
|
|
|
|
gdwarf-
|
|
Common Driver Joined UInteger Var(dwarf_version) Init(5) Negative(gstabs)
|
|
Generate debug information in DWARF v2 (or later) format.
|
|
|
|
gdwarf32
|
|
Common Driver Var(dwarf_offset_size,4) Init(4) RejectNegative
|
|
Use 32-bit DWARF format when emitting DWARF debug information.
|
|
|
|
gdwarf64
|
|
Common Driver Var(dwarf_offset_size,8) RejectNegative
|
|
Use 64-bit DWARF format when emitting DWARF debug information.
|
|
|
|
ggdb
|
|
Common Driver JoinedOrMissing
|
|
Generate debug information in default extended format.
|
|
|
|
ginline-points
|
|
Common Driver Var(debug_inline_points)
|
|
Generate extended entry point information for inlined functions.
|
|
|
|
ginternal-reset-location-views
|
|
Common Driver Var(debug_internal_reset_location_views) Init(2)
|
|
Compute locview reset points based on insn length estimates.
|
|
|
|
gno-
|
|
RejectNegative Joined Undocumented
|
|
; Catch the gno- prefix, so it doesn't backtrack to g<level>.
|
|
|
|
gno-pubnames
|
|
Common Driver Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1)
|
|
Don't generate DWARF pubnames and pubtypes sections.
|
|
|
|
gpubnames
|
|
Common Driver Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1)
|
|
Generate DWARF pubnames and pubtypes sections.
|
|
|
|
ggnu-pubnames
|
|
Common Driver Negative(gno-pubnames) Var(debug_generate_pub_sections, 2)
|
|
Generate DWARF pubnames and pubtypes sections with GNU extensions.
|
|
|
|
grecord-gcc-switches
|
|
Common Driver Var(dwarf_record_gcc_switches) Init(1)
|
|
Record gcc command line switches in DWARF DW_AT_producer.
|
|
|
|
gsplit-dwarf
|
|
Common Driver Var(dwarf_split_debug_info) Init(0)
|
|
Generate debug information in separate .dwo files.
|
|
|
|
gstabs
|
|
Common Driver JoinedOrMissing Negative(gstabs+)
|
|
Generate debug information in STABS format.
|
|
|
|
gstabs+
|
|
Common Driver JoinedOrMissing Negative(gvms)
|
|
Generate debug information in extended STABS format.
|
|
|
|
gstatement-frontiers
|
|
Common Driver Var(debug_nonbind_markers_p) PerFunction
|
|
Emit progressive recommended breakpoint locations.
|
|
|
|
gstrict-dwarf
|
|
Common Driver Var(dwarf_strict) Init(0)
|
|
Don't emit DWARF additions beyond selected version.
|
|
|
|
gdescribe-dies
|
|
Common Driver Var(flag_describe_dies) Init(0)
|
|
Add description attributes to some DWARF DIEs that have no name attribute.
|
|
|
|
gtoggle
|
|
Common Driver Var(flag_gtoggle)
|
|
Toggle debug information generation.
|
|
|
|
gvariable-location-views
|
|
Common Driver Var(debug_variable_location_views, 1)
|
|
Augment variable location lists with progressive views.
|
|
|
|
gvariable-location-views=incompat5
|
|
Common Driver RejectNegative Var(debug_variable_location_views, -1) Init(2)
|
|
|
|
gvms
|
|
Common Driver JoinedOrMissing Negative(gxcoff)
|
|
Generate debug information in VMS format.
|
|
|
|
gxcoff
|
|
Common Driver JoinedOrMissing Negative(gxcoff+)
|
|
Generate debug information in XCOFF format.
|
|
|
|
gxcoff+
|
|
Common Driver JoinedOrMissing Negative(gdwarf)
|
|
Generate debug information in extended XCOFF format.
|
|
|
|
Enum
|
|
Name(compressed_debug_sections) Type(int)
|
|
|
|
; Since -gz= is completely handled in specs, the values aren't used and we
|
|
; assign arbitrary constants.
|
|
EnumValue
|
|
Enum(compressed_debug_sections) String(none) Value(0)
|
|
|
|
EnumValue
|
|
Enum(compressed_debug_sections) String(zlib) Value(1)
|
|
|
|
EnumValue
|
|
Enum(compressed_debug_sections) String(zlib-gnu) Value(2)
|
|
|
|
gz
|
|
Common Driver
|
|
Generate compressed debug sections.
|
|
|
|
gz=
|
|
Common Driver RejectNegative Joined Enum(compressed_debug_sections)
|
|
-gz=<format> Generate compressed debug sections in format <format>.
|
|
|
|
h
|
|
Driver Joined Separate
|
|
|
|
iplugindir=
|
|
Common Joined Var(plugindir_string) Init(0)
|
|
-iplugindir=<dir> Set <dir> to be the default plugin directory.
|
|
|
|
imultiarch
|
|
Common Joined Separate RejectDriver Var(imultiarch) Init(0)
|
|
-imultiarch <dir> Set <dir> to be the multiarch include subdirectory.
|
|
|
|
l
|
|
Driver Joined Separate
|
|
|
|
n
|
|
Driver
|
|
|
|
no-canonical-prefixes
|
|
Driver
|
|
|
|
nodefaultlibs
|
|
Driver
|
|
|
|
nostartfiles
|
|
Driver
|
|
|
|
nolibc
|
|
Driver
|
|
|
|
nostdlib
|
|
Driver
|
|
|
|
o
|
|
Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs)
|
|
-o <file> Place output into <file>.
|
|
|
|
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(static-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-libphobos
|
|
Driver
|
|
; Documented for D, but always accepted by driver.
|
|
|
|
static-libstdc++
|
|
Driver
|
|
|
|
static-libgo
|
|
Driver
|
|
; Documented for Go, but always accepted by driver.
|
|
|
|
static-libasan
|
|
Driver
|
|
|
|
static-libhwasan
|
|
Driver
|
|
|
|
static-libtsan
|
|
Driver
|
|
|
|
static-liblsan
|
|
Driver
|
|
|
|
static-libubsan
|
|
Driver
|
|
|
|
symbolic
|
|
Driver
|
|
|
|
no-pie
|
|
Driver RejectNegative Negative(shared)
|
|
Don't create a dynamically linked position independent executable.
|
|
|
|
pie
|
|
Driver RejectNegative Negative(no-pie)
|
|
Create a dynamically linked position independent executable.
|
|
|
|
static-pie
|
|
Driver RejectNegative Negative(pie)
|
|
Create a static position independent executable.
|
|
|
|
z
|
|
Driver Joined Separate
|
|
|
|
fipa-ra
|
|
Common Var(flag_ipa_ra) Optimization
|
|
Use caller save register across calls if possible.
|
|
|
|
; This comment is to ensure we retain the blank line above.
|