; Options for the language- and target-independent parts of the compiler.
|
; Options for the language- and target-independent parts of the compiler.
|
|
|
; Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
|
; Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
|
;
|
;
|
; This file is part of GCC.
|
; This file is part of GCC.
|
;
|
;
|
; GCC is free software; you can redistribute it and/or modify it under
|
; GCC is free software; you can redistribute it and/or modify it under
|
; the terms of the GNU General Public License as published by the Free
|
; the terms of the GNU General Public License as published by the Free
|
; Software Foundation; either version 3, or (at your option) any later
|
; Software Foundation; either version 3, or (at your option) any later
|
; version.
|
; version.
|
;
|
;
|
; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
; WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
; WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
; for more details.
|
; for more details.
|
;
|
;
|
; You should have received a copy of the GNU General Public License
|
; You should have received a copy of the GNU General Public License
|
; along with GCC; see the file COPYING3. If not see
|
; along with GCC; see the file COPYING3. If not see
|
; .
|
; .
|
|
|
; See the GCC internals manual for a description of this file's format.
|
; See the GCC internals manual for a description of this file's format.
|
|
|
; Please try to keep this file in ASCII collating order.
|
; Please try to keep this file in ASCII collating order.
|
|
|
-help
|
-help
|
Common
|
Common
|
Display this information
|
Display this information
|
|
|
-param
|
-param
|
Common Separate
|
Common Separate
|
--param = Set parameter to value. See below for a complete list of parameters
|
--param = Set parameter to value. See below for a complete list of parameters
|
|
|
-target-help
|
-target-help
|
Common
|
Common
|
|
|
-version
|
-version
|
Common
|
Common
|
|
|
G
|
G
|
Common Joined Separate UInteger
|
Common Joined Separate UInteger
|
-G Put global and static data smaller than bytes into a special section (on some targets)
|
-G Put global and static data smaller than bytes into a special section (on some targets)
|
|
|
O
|
O
|
Common JoinedOrMissing
|
Common JoinedOrMissing
|
-O Set optimization level to
|
-O Set optimization level to
|
|
|
Os
|
Os
|
Common
|
Common
|
Optimize for space rather than speed
|
Optimize for space rather than speed
|
|
|
W
|
W
|
Common RejectNegative
|
Common RejectNegative
|
This switch is deprecated; use -Wextra instead
|
This switch is deprecated; use -Wextra instead
|
|
|
Waggregate-return
|
Waggregate-return
|
Common Var(warn_aggregate_return)
|
Common Var(warn_aggregate_return)
|
Warn about returning structures, unions or arrays
|
Warn about returning structures, unions or arrays
|
|
|
Wattributes
|
Wattributes
|
Common Var(warn_attributes) Init(1)
|
Common Var(warn_attributes) Init(1)
|
Warn about inappropriate attribute usage
|
Warn about inappropriate attribute usage
|
|
|
Wcast-align
|
Wcast-align
|
Common Var(warn_cast_align)
|
Common Var(warn_cast_align)
|
Warn about pointer casts which increase alignment
|
Warn about pointer casts which increase alignment
|
|
|
Wdeprecated-declarations
|
Wdeprecated-declarations
|
Common Var(warn_deprecated_decl) Init(1)
|
Common Var(warn_deprecated_decl) Init(1)
|
Warn about uses of __attribute__((deprecated)) declarations
|
Warn about uses of __attribute__((deprecated)) declarations
|
|
|
Wdisabled-optimization
|
Wdisabled-optimization
|
Common Var(warn_disabled_optimization)
|
Common Var(warn_disabled_optimization)
|
Warn when an optimization pass is disabled
|
Warn when an optimization pass is disabled
|
|
|
Werror
|
Werror
|
Common Var(warnings_are_errors)
|
Common Var(warnings_are_errors)
|
Treat all warnings as errors
|
Treat all warnings as errors
|
|
|
Werror=
|
Werror=
|
Common Joined
|
Common Joined
|
Treat specified warning as error
|
Treat specified warning as error
|
|
|
Wextra
|
Wextra
|
Common
|
Common
|
Print extra (possibly unwanted) warnings
|
Print extra (possibly unwanted) warnings
|
|
|
Wfatal-errors
|
Wfatal-errors
|
Common Var(flag_fatal_errors)
|
Common Var(flag_fatal_errors)
|
Exit on the first error occurred
|
Exit on the first error occurred
|
|
|
Winline
|
Winline
|
Common Var(warn_inline)
|
Common Var(warn_inline)
|
Warn when an inlined function cannot be inlined
|
Warn when an inlined function cannot be inlined
|
|
|
Wlarger-than-
|
Wlarger-than-
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
-Wlarger-than- Warn if an object is larger than bytes
|
-Wlarger-than- Warn if an object is larger than bytes
|
|
|
Wunsafe-loop-optimizations
|
Wunsafe-loop-optimizations
|
Common Var(warn_unsafe_loop_optimizations)
|
Common Var(warn_unsafe_loop_optimizations)
|
Warn if the loop cannot be optimized due to nontrivial assumptions.
|
Warn if the loop cannot be optimized due to nontrivial assumptions.
|
|
|
Wmissing-noreturn
|
Wmissing-noreturn
|
Common Var(warn_missing_noreturn)
|
Common Var(warn_missing_noreturn)
|
Warn about functions which might be candidates for __attribute__((noreturn))
|
Warn about functions which might be candidates for __attribute__((noreturn))
|
|
|
Woverflow
|
Woverflow
|
Common Var(warn_overflow) Init(1)
|
Common Var(warn_overflow) Init(1)
|
Warn about overflow in arithmetic expressions
|
Warn about overflow in arithmetic expressions
|
|
|
Wpacked
|
Wpacked
|
Common Var(warn_packed)
|
Common Var(warn_packed)
|
Warn when the packed attribute has no effect on struct layout
|
Warn when the packed attribute has no effect on struct layout
|
|
|
Wpadded
|
Wpadded
|
Common Var(warn_padded)
|
Common Var(warn_padded)
|
Warn when padding is required to align structure members
|
Warn when padding is required to align structure members
|
|
|
Wshadow
|
Wshadow
|
Common Var(warn_shadow)
|
Common Var(warn_shadow)
|
Warn when one local variable shadows another
|
Warn when one local variable shadows another
|
|
|
Wstack-protector
|
Wstack-protector
|
Common Var(warn_stack_protect)
|
Common Var(warn_stack_protect)
|
Warn when not issuing stack smashing protection for some reason
|
Warn when not issuing stack smashing protection for some reason
|
|
|
Wstrict-aliasing
|
Wstrict-aliasing
|
Common
|
Common
|
Warn about code which might break strict aliasing rules
|
Warn about code which might break strict aliasing rules
|
|
|
Wstrict-aliasing=
|
Wstrict-aliasing=
|
Common Joined UInteger
|
Common Joined UInteger
|
Warn about code which might break strict aliasing rules
|
Warn about code which might break strict aliasing rules
|
|
|
Wstrict-overflow
|
Wstrict-overflow
|
Common
|
Common
|
Warn about optimizations that assume that signed overflow is undefined
|
Warn about optimizations that assume that signed overflow is undefined
|
|
|
Wstrict-overflow=
|
Wstrict-overflow=
|
Common Joined UInteger
|
Common Joined UInteger
|
Warn about optimizations that assume that signed overflow is undefined
|
Warn about optimizations that assume that signed overflow is undefined
|
|
|
Wswitch
|
Wswitch
|
Common Var(warn_switch)
|
Common Var(warn_switch)
|
Warn about enumerated switches, with no default, missing a case
|
Warn about enumerated switches, with no default, missing a case
|
|
|
Wswitch-default
|
Wswitch-default
|
Common Var(warn_switch_default)
|
Common Var(warn_switch_default)
|
Warn about enumerated switches missing a \"default:\" statement
|
Warn about enumerated switches missing a \"default:\" statement
|
|
|
Wswitch-enum
|
Wswitch-enum
|
Common Var(warn_switch_enum)
|
Common Var(warn_switch_enum)
|
Warn about all enumerated switches missing a specific case
|
Warn about all enumerated switches missing a specific case
|
|
|
Wsystem-headers
|
Wsystem-headers
|
Common Var(warn_system_headers)
|
Common Var(warn_system_headers)
|
Do not suppress warnings from system headers
|
Do not suppress warnings from system headers
|
|
|
Wuninitialized
|
Wuninitialized
|
Common Var(warn_uninitialized)
|
Common Var(warn_uninitialized)
|
Warn about uninitialized automatic variables
|
Warn about uninitialized automatic variables
|
|
|
Wunreachable-code
|
Wunreachable-code
|
Common Var(warn_notreached)
|
Common Var(warn_notreached)
|
Warn about code that will never be executed
|
Warn about code that will never be executed
|
|
|
Wunused
|
Wunused
|
Common
|
Common
|
Enable all -Wunused- warnings
|
Enable all -Wunused- warnings
|
|
|
Wunused-function
|
Wunused-function
|
Common Var(warn_unused_function)
|
Common Var(warn_unused_function)
|
Warn when a function is unused
|
Warn when a function is unused
|
|
|
Wunused-label
|
Wunused-label
|
Common Var(warn_unused_label)
|
Common Var(warn_unused_label)
|
Warn when a label is unused
|
Warn when a label is unused
|
|
|
Wunused-parameter
|
Wunused-parameter
|
Common Var(warn_unused_parameter)
|
Common Var(warn_unused_parameter)
|
Warn when a function parameter is unused
|
Warn when a function parameter is unused
|
|
|
Wunused-value
|
Wunused-value
|
Common Var(warn_unused_value)
|
Common Var(warn_unused_value)
|
Warn when an expression value is unused
|
Warn when an expression value is unused
|
|
|
Wunused-variable
|
Wunused-variable
|
Common Var(warn_unused_variable)
|
Common Var(warn_unused_variable)
|
Warn when a variable is unused
|
Warn when a variable is unused
|
|
|
Wvolatile-register-var
|
Wvolatile-register-var
|
Common Var(warn_register_var)
|
Common Var(warn_register_var)
|
Warn when a register variable is declared volatile
|
Warn when a register variable is declared volatile
|
|
|
aux-info
|
aux-info
|
Common Separate
|
Common Separate
|
-aux-info Emit declaration information into
|
-aux-info Emit declaration information into
|
|
|
aux-info=
|
aux-info=
|
Common Joined
|
Common Joined
|
|
|
auxbase
|
auxbase
|
Common Separate
|
Common Separate
|
|
|
auxbase-strip
|
auxbase-strip
|
Common Separate
|
Common Separate
|
|
|
d
|
d
|
Common Joined
|
Common Joined
|
-d Enable dumps from specific passes of the compiler
|
-d Enable dumps from specific passes of the compiler
|
|
|
dumpbase
|
dumpbase
|
Common Separate
|
Common Separate
|
-dumpbase Set the file basename to be used for dumps
|
-dumpbase Set the file basename to be used for dumps
|
|
|
; The version of the C++ ABI in use. The following values are allowed:
|
; 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
|
; 0: The version of the ABI believed most conformant with the C++ ABI
|
; specification. This ABI may change as bugs are discovered and fixed.
|
; specification. This ABI may change as bugs are discovered and fixed.
|
; Therefore, 0 will not necessarily indicate the same ABI in different
|
; Therefore, 0 will not necessarily indicate the same ABI in different
|
; versions of G++.
|
; versions of G++.
|
;
|
;
|
; 1: The version of the ABI first used in G++ 3.2.
|
; 1: The version of the ABI first used in G++ 3.2.
|
;
|
;
|
; Additional positive integers will be assigned as new versions of
|
; Additional positive integers will be assigned as new versions of
|
; the ABI become the default version of the ABI.
|
; the ABI become the default version of the ABI.
|
fabi-version=
|
fabi-version=
|
Common Joined UInteger Var(flag_abi_version) Init(2)
|
Common Joined UInteger Var(flag_abi_version) Init(2)
|
|
|
falign-functions
|
falign-functions
|
Common Report Var(align_functions,0)
|
Common Report Var(align_functions,0)
|
Align the start of functions
|
Align the start of functions
|
|
|
falign-functions=
|
falign-functions=
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
|
|
falign-jumps
|
falign-jumps
|
Common Report Var(align_jumps,0)
|
Common Report Var(align_jumps,0)
|
Align labels which are only reached by jumping
|
Align labels which are only reached by jumping
|
|
|
falign-jumps=
|
falign-jumps=
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
|
|
falign-labels
|
falign-labels
|
Common Report Var(align_labels,0)
|
Common Report Var(align_labels,0)
|
Align all labels
|
Align all labels
|
|
|
falign-labels=
|
falign-labels=
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
|
|
falign-loops
|
falign-loops
|
Common Report Var(align_loops)
|
Common Report Var(align_loops)
|
Align the start of loops
|
Align the start of loops
|
|
|
falign-loops=
|
falign-loops=
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
|
|
; This flag is only tested if alias checking is enabled.
|
; This flag is only tested if alias checking is enabled.
|
; 0 if pointer arguments may alias each other. True in C.
|
; 0 if pointer arguments may alias each other. True in C.
|
; 1 if pointer arguments may not alias each other but may alias
|
; 1 if pointer arguments may not alias each other but may alias
|
; global variables.
|
; global variables.
|
; 2 if pointer arguments may not alias each other and may not
|
; 2 if pointer arguments may not alias each other and may not
|
; alias global variables.
|
; alias global variables.
|
; 3 if pointer arguments may not alias anything. True in Fortran.
|
; 3 if pointer arguments may not alias anything. True in Fortran.
|
; Set by the front end.
|
; Set by the front end.
|
fargument-alias
|
fargument-alias
|
Common Report Var(flag_argument_noalias,0)
|
Common Report Var(flag_argument_noalias,0)
|
Specify that arguments may alias each other and globals
|
Specify that arguments may alias each other and globals
|
|
|
fargument-noalias
|
fargument-noalias
|
Common Report Var(flag_argument_noalias,1) VarExists
|
Common Report Var(flag_argument_noalias,1) VarExists
|
Assume arguments may alias globals but not each other
|
Assume arguments may alias globals but not each other
|
|
|
fargument-noalias-global
|
fargument-noalias-global
|
Common Report Var(flag_argument_noalias,2) VarExists
|
Common Report Var(flag_argument_noalias,2) VarExists
|
Assume arguments alias neither each other nor globals
|
Assume arguments alias neither each other nor globals
|
|
|
fargument-noalias-anything
|
fargument-noalias-anything
|
Common Report Var(flag_argument_noalias,3) VarExists
|
Common Report Var(flag_argument_noalias,3) VarExists
|
Assume arguments alias no other storage
|
Assume arguments alias no other storage
|
|
|
fasynchronous-unwind-tables
|
fasynchronous-unwind-tables
|
Common Report Var(flag_asynchronous_unwind_tables)
|
Common Report Var(flag_asynchronous_unwind_tables)
|
Generate unwind tables that are exact at each instruction boundary
|
Generate unwind tables that are exact at each instruction boundary
|
|
|
; -fcheck-bounds causes gcc to generate array bounds checks.
|
; -fcheck-bounds causes gcc to generate array bounds checks.
|
; For C, C++ and ObjC: defaults off.
|
; For C, C++ and ObjC: defaults off.
|
; For Java: defaults to on.
|
; For Java: defaults to on.
|
; For Fortran: defaults to off.
|
; For Fortran: defaults to off.
|
fbounds-check
|
fbounds-check
|
Common Report Var(flag_bounds_check)
|
Common Report Var(flag_bounds_check)
|
Generate code to check bounds before indexing arrays
|
Generate code to check bounds before indexing arrays
|
|
|
fbranch-count-reg
|
fbranch-count-reg
|
Common Report Var(flag_branch_on_count_reg) Init(1)
|
Common Report Var(flag_branch_on_count_reg) Init(1)
|
Replace add, compare, branch with branch on count register
|
Replace add, compare, branch with branch on count register
|
|
|
fbranch-probabilities
|
fbranch-probabilities
|
Common Report Var(flag_branch_probabilities)
|
Common Report Var(flag_branch_probabilities)
|
Use profiling information for branch probabilities
|
Use profiling information for branch probabilities
|
|
|
fbranch-target-load-optimize
|
fbranch-target-load-optimize
|
Common Report Var(flag_branch_target_load_optimize)
|
Common Report Var(flag_branch_target_load_optimize)
|
Perform branch target load optimization before prologue / epilogue threading
|
Perform branch target load optimization before prologue / epilogue threading
|
|
|
fbranch-target-load-optimize2
|
fbranch-target-load-optimize2
|
Common Report Var(flag_branch_target_load_optimize2)
|
Common Report Var(flag_branch_target_load_optimize2)
|
Perform branch target load optimization after prologue / epilogue threading
|
Perform branch target load optimization after prologue / epilogue threading
|
|
|
fbtr-bb-exclusive
|
fbtr-bb-exclusive
|
Common Report Var(flag_btr_bb_exclusive)
|
Common Report Var(flag_btr_bb_exclusive)
|
Restrict target load migration not to re-use registers in any basic block
|
Restrict target load migration not to re-use registers in any basic block
|
|
|
fcall-saved-
|
fcall-saved-
|
Common Joined RejectNegative
|
Common Joined RejectNegative
|
-fcall-saved- Mark as being preserved across functions
|
-fcall-saved- Mark as being preserved across functions
|
|
|
fcall-used-
|
fcall-used-
|
Common Joined RejectNegative
|
Common Joined RejectNegative
|
-fcall-used- Mark as being corrupted by function calls
|
-fcall-used- Mark as being corrupted by function calls
|
|
|
; Nonzero for -fcaller-saves: allocate values in regs that need to
|
; Nonzero for -fcaller-saves: allocate values in regs that need to
|
; be saved across function calls, if that produces overall better code.
|
; be saved across function calls, if that produces overall better code.
|
; Optional now, so people can test it.
|
; Optional now, so people can test it.
|
fcaller-saves
|
fcaller-saves
|
Common Report Var(flag_caller_saves)
|
Common Report Var(flag_caller_saves)
|
Save registers around function calls
|
Save registers around function calls
|
|
|
fcommon
|
fcommon
|
Common Report Var(flag_no_common,0)
|
Common Report Var(flag_no_common,0)
|
Do not put uninitialized globals in the common section
|
Do not put uninitialized globals in the common section
|
|
|
fcprop-registers
|
fcprop-registers
|
Common Report Var(flag_cprop_registers)
|
Common Report Var(flag_cprop_registers)
|
Perform a register copy-propagation optimization pass
|
Perform a register copy-propagation optimization pass
|
|
|
fcrossjumping
|
fcrossjumping
|
Common Report Var(flag_crossjumping)
|
Common Report Var(flag_crossjumping)
|
Perform cross-jumping optimization
|
Perform cross-jumping optimization
|
|
|
fcse-follow-jumps
|
fcse-follow-jumps
|
Common Report Var(flag_cse_follow_jumps)
|
Common Report Var(flag_cse_follow_jumps)
|
When running CSE, follow jumps to their targets
|
When running CSE, follow jumps to their targets
|
|
|
fcse-skip-blocks
|
fcse-skip-blocks
|
Common Report Var(flag_cse_skip_blocks)
|
Common Report Var(flag_cse_skip_blocks)
|
When running CSE, follow conditional jumps
|
When running CSE, follow conditional jumps
|
|
|
fcx-limited-range
|
fcx-limited-range
|
Common Report Var(flag_cx_limited_range)
|
Common Report Var(flag_cx_limited_range)
|
Omit range reduction step when performing complex division
|
Omit range reduction step when performing complex division
|
|
|
fdata-sections
|
fdata-sections
|
Common Report Var(flag_data_sections)
|
Common Report Var(flag_data_sections)
|
Place data items into their own section
|
Place data items into their own section
|
|
|
; Nonzero for -fdefer-pop: don't pop args after each function call
|
; Nonzero for -fdefer-pop: don't pop args after each function call
|
; instead save them up to pop many calls' args with one insns.
|
; instead save them up to pop many calls' args with one insns.
|
fdefer-pop
|
fdefer-pop
|
Common Report Var(flag_defer_pop)
|
Common Report Var(flag_defer_pop)
|
Defer popping functions args from stack until later
|
Defer popping functions args from stack until later
|
|
|
fdelayed-branch
|
fdelayed-branch
|
Common Report Var(flag_delayed_branch)
|
Common Report Var(flag_delayed_branch)
|
Attempt to fill delay slots of branch instructions
|
Attempt to fill delay slots of branch instructions
|
|
|
fdelete-null-pointer-checks
|
fdelete-null-pointer-checks
|
Common Report Var(flag_delete_null_pointer_checks)
|
Common Report Var(flag_delete_null_pointer_checks)
|
Delete useless null pointer checks
|
Delete useless null pointer checks
|
|
|
fdiagnostics-show-location=
|
fdiagnostics-show-location=
|
Common Joined RejectNegative
|
Common Joined RejectNegative
|
-fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics
|
-fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics
|
|
|
fdiagnostics-show-option
|
fdiagnostics-show-option
|
Common
|
Common
|
Amend appropriate diagnostic messages with the command line option that controls them
|
Amend appropriate diagnostic messages with the command line option that controls them
|
|
|
fdump-
|
fdump-
|
Common Joined RejectNegative
|
Common Joined RejectNegative
|
-fdump- Dump various compiler internals to a file
|
-fdump- Dump various compiler internals to a file
|
|
|
fdump-noaddr
|
fdump-noaddr
|
Common Report Var(flag_dump_noaddr)
|
Common Report Var(flag_dump_noaddr)
|
Suppress output of addresses in debugging dumps
|
Suppress output of addresses in debugging dumps
|
|
|
fdump-unnumbered
|
fdump-unnumbered
|
Common Report Var(flag_dump_unnumbered) VarExists
|
Common Report Var(flag_dump_unnumbered) VarExists
|
Suppress output of instruction numbers, line number notes and addresses in debugging dumps
|
Suppress output of instruction numbers, line number notes and addresses in debugging dumps
|
|
|
fearly-inlining
|
fearly-inlining
|
Common Report Var(flag_early_inlining) Init(1)
|
Common Report Var(flag_early_inlining) Init(1)
|
Perform early inlining
|
Perform early inlining
|
|
|
feliminate-dwarf2-dups
|
feliminate-dwarf2-dups
|
Common Report Var(flag_eliminate_dwarf2_dups)
|
Common Report Var(flag_eliminate_dwarf2_dups)
|
Perform DWARF2 duplicate elimination
|
Perform DWARF2 duplicate elimination
|
|
|
feliminate-unused-debug-symbols
|
feliminate-unused-debug-symbols
|
Common Report Var(flag_debug_only_used_symbols)
|
Common Report Var(flag_debug_only_used_symbols)
|
Perform unused type elimination in debug info
|
Perform unused type elimination in debug info
|
|
|
feliminate-unused-debug-types
|
feliminate-unused-debug-types
|
Common Report Var(flag_eliminate_unused_debug_types) Init(1)
|
Common Report Var(flag_eliminate_unused_debug_types) Init(1)
|
Perform unused type elimination in debug info
|
Perform unused type elimination in debug info
|
|
|
femit-class-debug-always
|
femit-class-debug-always
|
Common Report Var(flag_emit_class_debug_always) Init(0)
|
Common Report Var(flag_emit_class_debug_always) Init(0)
|
Do not suppress C++ class debug information.
|
Do not suppress C++ class debug information.
|
|
|
fexceptions
|
fexceptions
|
Common Report Var(flag_exceptions)
|
Common Report Var(flag_exceptions)
|
Enable exception handling
|
Enable exception handling
|
|
|
fexpensive-optimizations
|
fexpensive-optimizations
|
Common Report Var(flag_expensive_optimizations)
|
Common Report Var(flag_expensive_optimizations)
|
Perform a number of minor, expensive optimizations
|
Perform a number of minor, expensive optimizations
|
|
|
ffast-math
|
ffast-math
|
Common
|
Common
|
|
|
ffinite-math-only
|
ffinite-math-only
|
Common Report Var(flag_finite_math_only)
|
Common Report Var(flag_finite_math_only)
|
Assume no NaNs or infinities are generated
|
Assume no NaNs or infinities are generated
|
|
|
ffixed-
|
ffixed-
|
Common Joined RejectNegative
|
Common Joined RejectNegative
|
-ffixed- Mark as being unavailable to the compiler
|
-ffixed- Mark as being unavailable to the compiler
|
|
|
ffloat-store
|
ffloat-store
|
Common Report Var(flag_float_store)
|
Common Report Var(flag_float_store)
|
Don't allocate floats and doubles in extended-precision registers
|
Don't allocate floats and doubles in extended-precision registers
|
|
|
; Nonzero for -fforce-addr: load memory address into a register before
|
; Nonzero for -fforce-addr: load memory address into a register before
|
; reference to memory. This makes better cse but slower compilation.
|
; reference to memory. This makes better cse but slower compilation.
|
fforce-addr
|
fforce-addr
|
Common Report Var(flag_force_addr)
|
Common Report Var(flag_force_addr)
|
Copy memory address constants into registers before use
|
Copy memory address constants into registers before use
|
|
|
; Nonzero for -fforce-mem: load memory value into a register
|
; Nonzero for -fforce-mem: load memory value into a register
|
; before arithmetic on it. This makes better cse but slower compilation.
|
; before arithmetic on it. This makes better cse but slower compilation.
|
fforce-mem
|
fforce-mem
|
Common Report Var(flag_force_mem)
|
Common Report Var(flag_force_mem)
|
Copy memory operands into registers before use
|
Copy memory operands into registers before use
|
|
|
; Nonzero means don't put addresses of constant functions in registers.
|
; Nonzero means don't put addresses of constant functions in registers.
|
; Used for compiling the Unix kernel, where strange substitutions are
|
; Used for compiling the Unix kernel, where strange substitutions are
|
; done on the assembly output.
|
; done on the assembly output.
|
ffunction-cse
|
ffunction-cse
|
Common Report Var(flag_no_function_cse,0)
|
Common Report Var(flag_no_function_cse,0)
|
Allow function addresses to be held in registers
|
Allow function addresses to be held in registers
|
|
|
ffunction-sections
|
ffunction-sections
|
Common Report Var(flag_function_sections)
|
Common Report Var(flag_function_sections)
|
Place each function into its own section
|
Place each function into its own section
|
|
|
fgcse
|
fgcse
|
Common Report Var(flag_gcse)
|
Common Report Var(flag_gcse)
|
Perform global common subexpression elimination
|
Perform global common subexpression elimination
|
|
|
fgcse-lm
|
fgcse-lm
|
Common Report Var(flag_gcse_lm) Init(1)
|
Common Report Var(flag_gcse_lm) Init(1)
|
Perform enhanced load motion during global common subexpression elimination
|
Perform enhanced load motion during global common subexpression elimination
|
|
|
fgcse-sm
|
fgcse-sm
|
Common Report Var(flag_gcse_sm) Init(0)
|
Common Report Var(flag_gcse_sm) Init(0)
|
Perform store motion after global common subexpression elimination
|
Perform store motion after global common subexpression elimination
|
|
|
fgcse-las
|
fgcse-las
|
Common Report Var(flag_gcse_las) Init(0)
|
Common Report Var(flag_gcse_las) Init(0)
|
Perform redundant load after store elimination in global common subexpression
|
Perform redundant load after store elimination in global common subexpression
|
elimination
|
elimination
|
|
|
fgcse-after-reload
|
fgcse-after-reload
|
Common Report Var(flag_gcse_after_reload)
|
Common Report Var(flag_gcse_after_reload)
|
Perform global common subexpression elimination after register allocation
|
Perform global common subexpression elimination after register allocation
|
has finished
|
has finished
|
|
|
fguess-branch-probability
|
fguess-branch-probability
|
Common Report Var(flag_guess_branch_prob)
|
Common Report Var(flag_guess_branch_prob)
|
Enable guessing of branch probabilities
|
Enable guessing of branch probabilities
|
|
|
; Nonzero means ignore `#ident' directives. 0 means handle them.
|
; Nonzero means ignore `#ident' directives. 0 means handle them.
|
; Generate position-independent code for executables if possible
|
; Generate position-independent code for executables if possible
|
; On SVR4 targets, it also controls whether or not to emit a
|
; On SVR4 targets, it also controls whether or not to emit a
|
; string identifying the compiler.
|
; string identifying the compiler.
|
fident
|
fident
|
Common Report Var(flag_no_ident,0)
|
Common Report Var(flag_no_ident,0)
|
Process #ident directives
|
Process #ident directives
|
|
|
fif-conversion
|
fif-conversion
|
Common Report Var(flag_if_conversion)
|
Common Report Var(flag_if_conversion)
|
Perform conversion of conditional jumps to branchless equivalents
|
Perform conversion of conditional jumps to branchless equivalents
|
|
|
fif-conversion2
|
fif-conversion2
|
Common Report Var(flag_if_conversion2)
|
Common Report Var(flag_if_conversion2)
|
Perform conversion of conditional jumps to conditional execution
|
Perform conversion of conditional jumps to conditional execution
|
|
|
; -finhibit-size-directive inhibits output of .size for ELF.
|
; -finhibit-size-directive inhibits output of .size for ELF.
|
; This is used only for compiling crtstuff.c,
|
; This is used only for compiling crtstuff.c,
|
; and it may be extended to other effects
|
; and it may be extended to other effects
|
; needed for crtstuff.c on other systems.
|
; needed for crtstuff.c on other systems.
|
finhibit-size-directive
|
finhibit-size-directive
|
Common Report Var(flag_inhibit_size_directive)
|
Common Report Var(flag_inhibit_size_directive)
|
Do not generate .size directives
|
Do not generate .size directives
|
|
|
; Nonzero means that functions declared `inline' will be treated
|
; Nonzero means that functions declared `inline' will be treated
|
; as `static'. Prevents generation of zillions of copies of unused
|
; as `static'. Prevents generation of zillions of copies of unused
|
; static inline functions; instead, `inlines' are written out
|
; static inline functions; instead, `inlines' are written out
|
; only when actually used. Used in conjunction with -g. Also
|
; only when actually used. Used in conjunction with -g. Also
|
; does the right thing with #pragma interface.
|
; does the right thing with #pragma interface.
|
finline
|
finline
|
Common Report Var(flag_no_inline,0) Init(2)
|
Common Report Var(flag_no_inline,0) Init(2)
|
Pay attention to the \"inline\" keyword
|
Pay attention to the \"inline\" keyword
|
|
|
finline-functions
|
finline-functions
|
Common Report Var(flag_inline_functions)
|
Common Report Var(flag_inline_functions)
|
Integrate simple functions into their callers
|
Integrate simple functions into their callers
|
|
|
finline-functions-called-once
|
finline-functions-called-once
|
Common Report Var(flag_inline_functions_called_once) Init(1)
|
Common Report Var(flag_inline_functions_called_once) Init(1)
|
Integrate functions called once into their callers
|
Integrate functions called once into their callers
|
|
|
finline-limit-
|
finline-limit-
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
|
|
finline-limit=
|
finline-limit=
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
-finline-limit= Limit the size of inlined functions to
|
-finline-limit= Limit the size of inlined functions to
|
|
|
finstrument-functions
|
finstrument-functions
|
Common Report Var(flag_instrument_function_entry_exit)
|
Common Report Var(flag_instrument_function_entry_exit)
|
Instrument function entry and exit with profiling calls
|
Instrument function entry and exit with profiling calls
|
|
|
fipa-cp
|
fipa-cp
|
Common Report Var(flag_ipa_cp)
|
Common Report Var(flag_ipa_cp)
|
Perform Interprocedural constant propagation
|
Perform Interprocedural constant propagation
|
|
|
fipa-pure-const
|
fipa-pure-const
|
Common Report Var(flag_ipa_pure_const) Init(0)
|
Common Report Var(flag_ipa_pure_const) Init(0)
|
Discover pure and const functions
|
Discover pure and const functions
|
|
|
fipa-pta
|
fipa-pta
|
Common Report Var(flag_ipa_pta) Init(0)
|
Common Report Var(flag_ipa_pta) Init(0)
|
Perform interprocedural points-to analysis
|
Perform interprocedural points-to analysis
|
|
|
fipa-reference
|
fipa-reference
|
Common Report Var(flag_ipa_reference) Init(0)
|
Common Report Var(flag_ipa_reference) Init(0)
|
Discover readonly and non addressable static variables
|
Discover readonly and non addressable static variables
|
|
|
fipa-type-escape
|
fipa-type-escape
|
Common Report Var(flag_ipa_type_escape) Init(0)
|
Common Report Var(flag_ipa_type_escape) Init(0)
|
Type based escape and alias analysis
|
Type based escape and alias analysis
|
|
|
fivopts
|
fivopts
|
Common Report Var(flag_ivopts) Init(1)
|
Common Report Var(flag_ivopts) Init(1)
|
Optimize induction variables on trees
|
Optimize induction variables on trees
|
|
|
fjump-tables
|
fjump-tables
|
Common Var(flag_jump_tables) Init(1)
|
Common Var(flag_jump_tables) Init(1)
|
Use jump tables for sufficiently large switch statements
|
Use jump tables for sufficiently large switch statements
|
|
|
fkeep-inline-functions
|
fkeep-inline-functions
|
Common Report Var(flag_keep_inline_functions)
|
Common Report Var(flag_keep_inline_functions)
|
Generate code for functions even if they are fully inlined
|
Generate code for functions even if they are fully inlined
|
|
|
fkeep-static-consts
|
fkeep-static-consts
|
Common Report Var(flag_keep_static_consts) Init(1)
|
Common Report Var(flag_keep_static_consts) Init(1)
|
Emit static const variables even if they are not used
|
Emit static const variables even if they are not used
|
|
|
fleading-underscore
|
fleading-underscore
|
Common Report Var(flag_leading_underscore) Init(-1)
|
Common Report Var(flag_leading_underscore) Init(-1)
|
Give external symbols a leading underscore
|
Give external symbols a leading underscore
|
|
|
floop-optimize
|
floop-optimize
|
Common
|
Common
|
Does nothing. Preserved for backward compatibility.
|
Does nothing. Preserved for backward compatibility.
|
|
|
fmath-errno
|
fmath-errno
|
Common Report Var(flag_errno_math) Init(1)
|
Common Report Var(flag_errno_math) Init(1)
|
Set errno after built-in math functions
|
Set errno after built-in math functions
|
|
|
fmem-report
|
fmem-report
|
Common Report Var(mem_report)
|
Common Report Var(mem_report)
|
Report on permanent memory allocation
|
Report on permanent memory allocation
|
|
|
; This will attempt to merge constant section constants, if 1 only
|
; This will attempt to merge constant section constants, if 1 only
|
; string constants and constants from constant pool, if 2 also constant
|
; string constants and constants from constant pool, if 2 also constant
|
; variables.
|
; variables.
|
fmerge-all-constants
|
fmerge-all-constants
|
Common Report Var(flag_merge_constants,2) Init(1)
|
Common Report Var(flag_merge_constants,2) Init(1)
|
Attempt to merge identical constants and constant variables
|
Attempt to merge identical constants and constant variables
|
|
|
fmerge-constants
|
fmerge-constants
|
Common Report Var(flag_merge_constants,1) VarExists
|
Common Report Var(flag_merge_constants,1) VarExists
|
Attempt to merge identical constants across compilation units
|
Attempt to merge identical constants across compilation units
|
|
|
fmessage-length=
|
fmessage-length=
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
-fmessage-length= Limit diagnostics to characters per line. 0 suppresses line-wrapping
|
-fmessage-length= Limit diagnostics to characters per line. 0 suppresses line-wrapping
|
|
|
fmodulo-sched
|
fmodulo-sched
|
Common Report Var(flag_modulo_sched)
|
Common Report Var(flag_modulo_sched)
|
Perform SMS based modulo scheduling before the first scheduling pass
|
Perform SMS based modulo scheduling before the first scheduling pass
|
|
|
fmove-loop-invariants
|
fmove-loop-invariants
|
Common Report Var(flag_move_loop_invariants) Init(1)
|
Common Report Var(flag_move_loop_invariants) Init(1)
|
Move loop invariant computations out of loops
|
Move loop invariant computations out of loops
|
|
|
fmudflap
|
fmudflap
|
Common RejectNegative Report Var(flag_mudflap)
|
Common RejectNegative Report Var(flag_mudflap)
|
Add mudflap bounds-checking instrumentation for single-threaded program
|
Add mudflap bounds-checking instrumentation for single-threaded program
|
|
|
fmudflapth
|
fmudflapth
|
Common RejectNegative Report VarExists Var(flag_mudflap,2)
|
Common RejectNegative Report VarExists Var(flag_mudflap,2)
|
Add mudflap bounds-checking instrumentation for multi-threaded program
|
Add mudflap bounds-checking instrumentation for multi-threaded program
|
|
|
fmudflapir
|
fmudflapir
|
Common RejectNegative Report Var(flag_mudflap_ignore_reads)
|
Common RejectNegative Report Var(flag_mudflap_ignore_reads)
|
Ignore read operations when inserting mudflap instrumentation
|
Ignore read operations when inserting mudflap instrumentation
|
|
|
freschedule-modulo-scheduled-loops
|
freschedule-modulo-scheduled-loops
|
Common Report Var(flag_resched_modulo_sched)
|
Common Report Var(flag_resched_modulo_sched)
|
Enable/Disable the traditional scheduling in loops that already passed modulo scheduling
|
Enable/Disable the traditional scheduling in loops that already passed modulo scheduling
|
|
|
fnon-call-exceptions
|
fnon-call-exceptions
|
Common Report Var(flag_non_call_exceptions)
|
Common Report Var(flag_non_call_exceptions)
|
Support synchronous non-call exceptions
|
Support synchronous non-call exceptions
|
|
|
fomit-frame-pointer
|
fomit-frame-pointer
|
Common Report Var(flag_omit_frame_pointer)
|
Common Report Var(flag_omit_frame_pointer)
|
When possible do not generate stack frames
|
When possible do not generate stack frames
|
|
|
foptimize-register-move
|
foptimize-register-move
|
Common Report Var(flag_regmove)
|
Common Report Var(flag_regmove)
|
Do the full register move optimization pass
|
Do the full register move optimization pass
|
|
|
foptimize-sibling-calls
|
foptimize-sibling-calls
|
Common Report Var(flag_optimize_sibling_calls)
|
Common Report Var(flag_optimize_sibling_calls)
|
Optimize sibling and tail recursive calls
|
Optimize sibling and tail recursive calls
|
|
|
fpack-struct
|
fpack-struct
|
Common Report Var(flag_pack_struct)
|
Common Report Var(flag_pack_struct)
|
Pack structure members together without holes
|
Pack structure members together without holes
|
|
|
fpack-struct=
|
fpack-struct=
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
-fpack-struct= Set initial maximum structure member alignment
|
-fpack-struct= Set initial maximum structure member alignment
|
|
|
fpcc-struct-return
|
fpcc-struct-return
|
Common Report Var(flag_pcc_struct_return,1) VarExists
|
Common Report Var(flag_pcc_struct_return,1) VarExists
|
Return small aggregates in memory, not registers
|
Return small aggregates in memory, not registers
|
|
|
fpeel-loops
|
fpeel-loops
|
Common Report Var(flag_peel_loops)
|
Common Report Var(flag_peel_loops)
|
Perform loop peeling
|
Perform loop peeling
|
|
|
fpeephole
|
fpeephole
|
Common Report Var(flag_no_peephole,0)
|
Common Report Var(flag_no_peephole,0)
|
Enable machine specific peephole optimizations
|
Enable machine specific peephole optimizations
|
|
|
fpeephole2
|
fpeephole2
|
Common Report Var(flag_peephole2)
|
Common Report Var(flag_peephole2)
|
Enable an RTL peephole pass before sched2
|
Enable an RTL peephole pass before sched2
|
|
|
fPIC
|
fPIC
|
Common Report Var(flag_pic,2)
|
Common Report Var(flag_pic,2)
|
Generate position-independent code if possible (large mode)
|
Generate position-independent code if possible (large mode)
|
|
|
fPIE
|
fPIE
|
Common Report Var(flag_pie,2)
|
Common Report Var(flag_pie,2)
|
Generate position-independent code for executables if possible (large mode)
|
Generate position-independent code for executables if possible (large mode)
|
|
|
fpic
|
fpic
|
Common Report Var(flag_pic,1) VarExists
|
Common Report Var(flag_pic,1) VarExists
|
Generate position-independent code if possible (small mode)
|
Generate position-independent code if possible (small mode)
|
|
|
fpie
|
fpie
|
Common Report Var(flag_pie,1) VarExists
|
Common Report Var(flag_pie,1) VarExists
|
Generate position-independent code for executables if possible (small mode)
|
Generate position-independent code for executables if possible (small mode)
|
|
|
fprefetch-loop-arrays
|
fprefetch-loop-arrays
|
Common Report Var(flag_prefetch_loop_arrays)
|
Common Report Var(flag_prefetch_loop_arrays)
|
Generate prefetch instructions, if available, for arrays in loops
|
Generate prefetch instructions, if available, for arrays in loops
|
|
|
fprofile
|
fprofile
|
Common Report Var(profile_flag)
|
Common Report Var(profile_flag)
|
Enable basic program profiling code
|
Enable basic program profiling code
|
|
|
fprofile-arcs
|
fprofile-arcs
|
Common Report Var(profile_arc_flag)
|
Common Report Var(profile_arc_flag)
|
Insert arc-based program profiling code
|
Insert arc-based program profiling code
|
|
|
fprofile-generate
|
fprofile-generate
|
Common
|
Common
|
Enable common options for generating profile info for profile feedback directed optimizations
|
Enable common options for generating profile info for profile feedback directed optimizations
|
|
|
fprofile-use
|
fprofile-use
|
Common
|
Common
|
Enable common options for performing profile feedback directed optimizations
|
Enable common options for performing profile feedback directed optimizations
|
|
|
fprofile-values
|
fprofile-values
|
Common Report Var(flag_profile_values)
|
Common Report Var(flag_profile_values)
|
Insert code to profile values of expressions
|
Insert code to profile values of expressions
|
|
|
frandom-seed
|
frandom-seed
|
Common
|
Common
|
|
|
frandom-seed=
|
frandom-seed=
|
Common Joined RejectNegative
|
Common Joined RejectNegative
|
-frandom-seed= Make compile reproducible using
|
-frandom-seed= Make compile reproducible using
|
|
|
freg-struct-return
|
freg-struct-return
|
Common Report Var(flag_pcc_struct_return,0) VarExists
|
Common Report Var(flag_pcc_struct_return,0) VarExists
|
Return small aggregates in registers
|
Return small aggregates in registers
|
|
|
fregmove
|
fregmove
|
Common Report Var(flag_regmove)
|
Common Report Var(flag_regmove)
|
Enables a register move optimization
|
Enables a register move optimization
|
|
|
frename-registers
|
frename-registers
|
Common Report Var(flag_rename_registers) Init(2)
|
Common Report Var(flag_rename_registers) Init(2)
|
Perform a register renaming optimization pass
|
Perform a register renaming optimization pass
|
|
|
freorder-blocks
|
freorder-blocks
|
Common Report Var(flag_reorder_blocks)
|
Common Report Var(flag_reorder_blocks)
|
Reorder basic blocks to improve code placement
|
Reorder basic blocks to improve code placement
|
|
|
freorder-blocks-and-partition
|
freorder-blocks-and-partition
|
Common Report Var(flag_reorder_blocks_and_partition)
|
Common Report Var(flag_reorder_blocks_and_partition)
|
Reorder basic blocks and partition into hot and cold sections
|
Reorder basic blocks and partition into hot and cold sections
|
|
|
freorder-functions
|
freorder-functions
|
Common Report Var(flag_reorder_functions)
|
Common Report Var(flag_reorder_functions)
|
Reorder functions to improve code placement
|
Reorder functions to improve code placement
|
|
|
frerun-cse-after-loop
|
frerun-cse-after-loop
|
Common Report Var(flag_rerun_cse_after_loop) Init(2)
|
Common Report Var(flag_rerun_cse_after_loop) Init(2)
|
Add a common subexpression elimination pass after loop optimizations
|
Add a common subexpression elimination pass after loop optimizations
|
|
|
frerun-loop-opt
|
frerun-loop-opt
|
Common
|
Common
|
Does nothing. Preserved for backward compatibility.
|
Does nothing. Preserved for backward compatibility.
|
|
|
frounding-math
|
frounding-math
|
Common Report Var(flag_rounding_math)
|
Common Report Var(flag_rounding_math)
|
Disable optimizations that assume default FP rounding behavior
|
Disable optimizations that assume default FP rounding behavior
|
|
|
fsched-interblock
|
fsched-interblock
|
Common Report Var(flag_schedule_interblock) Init(1)
|
Common Report Var(flag_schedule_interblock) Init(1)
|
Enable scheduling across basic blocks
|
Enable scheduling across basic blocks
|
|
|
fsched-spec
|
fsched-spec
|
Common Report Var(flag_schedule_speculative) Init(1)
|
Common Report Var(flag_schedule_speculative) Init(1)
|
Allow speculative motion of non-loads
|
Allow speculative motion of non-loads
|
|
|
fsched-spec-load
|
fsched-spec-load
|
Common Report Var(flag_schedule_speculative_load)
|
Common Report Var(flag_schedule_speculative_load)
|
Allow speculative motion of some loads
|
Allow speculative motion of some loads
|
|
|
fsched-spec-load-dangerous
|
fsched-spec-load-dangerous
|
Common Report Var(flag_schedule_speculative_load_dangerous)
|
Common Report Var(flag_schedule_speculative_load_dangerous)
|
Allow speculative motion of more loads
|
Allow speculative motion of more loads
|
|
|
fsched-verbose=
|
fsched-verbose=
|
Common RejectNegative Joined
|
Common RejectNegative Joined
|
-fsched-verbose= Set the verbosity level of the scheduler
|
-fsched-verbose= Set the verbosity level of the scheduler
|
|
|
fsched2-use-superblocks
|
fsched2-use-superblocks
|
Common Report Var(flag_sched2_use_superblocks)
|
Common Report Var(flag_sched2_use_superblocks)
|
If scheduling post reload, do superblock scheduling
|
If scheduling post reload, do superblock scheduling
|
|
|
fsched2-use-traces
|
fsched2-use-traces
|
Common Report Var(flag_sched2_use_traces)
|
Common Report Var(flag_sched2_use_traces)
|
If scheduling post reload, do trace scheduling
|
If scheduling post reload, do trace scheduling
|
|
|
fschedule-insns
|
fschedule-insns
|
Common Report Var(flag_schedule_insns)
|
Common Report Var(flag_schedule_insns)
|
Reschedule instructions before register allocation
|
Reschedule instructions before register allocation
|
|
|
fschedule-insns2
|
fschedule-insns2
|
Common Report Var(flag_schedule_insns_after_reload)
|
Common Report Var(flag_schedule_insns_after_reload)
|
Reschedule instructions after register allocation
|
Reschedule instructions after register allocation
|
|
|
; sched_stalled_insns means that insns can be moved prematurely from the queue
|
; sched_stalled_insns means that insns can be moved prematurely from the queue
|
; of stalled insns into the ready list.
|
; of stalled insns into the ready list.
|
fsched-stalled-insns
|
fsched-stalled-insns
|
Common Report Var(flag_sched_stalled_insns)
|
Common Report Var(flag_sched_stalled_insns)
|
Allow premature scheduling of queued insns
|
Allow premature scheduling of queued insns
|
|
|
fsched-stalled-insns=
|
fsched-stalled-insns=
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
-fsched-stalled-insns= Set number of queued insns that can be prematurely scheduled
|
-fsched-stalled-insns= Set number of queued insns that can be prematurely scheduled
|
|
|
; sched_stalled_insns_dep controls how many recently scheduled cycles will
|
; sched_stalled_insns_dep controls how many recently scheduled cycles will
|
; be examined for a dependency on a stalled insn that is candidate for
|
; 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
|
; premature removal from the queue of stalled insns into the ready list (has
|
; an effect only if the flag 'sched_stalled_insns' is set).
|
; an effect only if the flag 'sched_stalled_insns' is set).
|
fsched-stalled-insns-dep
|
fsched-stalled-insns-dep
|
Common Report Var(flag_sched_stalled_insns_dep,1) Init(1)
|
Common Report Var(flag_sched_stalled_insns_dep,1) Init(1)
|
Set dependence distance checking in premature scheduling of queued insns
|
Set dependence distance checking in premature scheduling of queued insns
|
|
|
fsched-stalled-insns-dep=
|
fsched-stalled-insns-dep=
|
Common RejectNegative Joined UInteger
|
Common RejectNegative Joined UInteger
|
-fsched-stalled-insns-dep= Set dependence distance checking in premature scheduling of queued insns
|
-fsched-stalled-insns-dep= Set dependence distance checking in premature scheduling of queued insns
|
|
|
fsection-anchors
|
fsection-anchors
|
Common Report Var(flag_section_anchors)
|
Common Report Var(flag_section_anchors)
|
Access data in the same section from shared anchor points
|
Access data in the same section from shared anchor points
|
|
|
frtl-abstract-sequences
|
frtl-abstract-sequences
|
Common Report Var(flag_rtl_seqabstr)
|
Common Report Var(flag_rtl_seqabstr)
|
Perform sequence abstraction optimization on RTL
|
Perform sequence abstraction optimization on RTL
|
|
|
fsee
|
fsee
|
Common Report Var(flag_see) Init(0)
|
Common Report Var(flag_see) Init(0)
|
Eliminate redundant sign extensions using LCM.
|
Eliminate redundant sign extensions using LCM.
|
|
|
fshow-column
|
fshow-column
|
Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1)
|
Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1)
|
Show column numbers in diagnostics, when available. Default on
|
Show column numbers in diagnostics, when available. Default on
|
|
|
fsignaling-nans
|
fsignaling-nans
|
Common Report Var(flag_signaling_nans)
|
Common Report Var(flag_signaling_nans)
|
Disable optimizations observable by IEEE signaling NaNs
|
Disable optimizations observable by IEEE signaling NaNs
|
|
|
fsingle-precision-constant
|
fsingle-precision-constant
|
Common Report Var(flag_single_precision_constant)
|
Common Report Var(flag_single_precision_constant)
|
Convert floating point constants to single precision constants
|
Convert floating point constants to single precision constants
|
|
|
fsplit-ivs-in-unroller
|
fsplit-ivs-in-unroller
|
Common Report Var(flag_split_ivs_in_unroller) Init(1)
|
Common Report Var(flag_split_ivs_in_unroller) Init(1)
|
Split lifetimes of induction variables when loops are unrolled
|
Split lifetimes of induction variables when loops are unrolled
|
|
|
fvariable-expansion-in-unroller
|
fvariable-expansion-in-unroller
|
Common Report Var(flag_variable_expansion_in_unroller)
|
Common Report Var(flag_variable_expansion_in_unroller)
|
Apply variable expansion when loops are unrolled
|
Apply variable expansion when loops are unrolled
|
|
|
; Emit code to probe the stack, to help detect stack overflow; also
|
; Emit code to probe the stack, to help detect stack overflow; also
|
; may cause large objects to be allocated dynamically.
|
; may cause large objects to be allocated dynamically.
|
fstack-check
|
fstack-check
|
Common Report Var(flag_stack_check)
|
Common Report Var(flag_stack_check)
|
Insert stack checking code into the program
|
Insert stack checking code into the program
|
|
|
fstack-limit
|
fstack-limit
|
Common
|
Common
|
|
|
fstack-limit-register=
|
fstack-limit-register=
|
Common RejectNegative Joined
|
Common RejectNegative Joined
|
-fstack-limit-register= Trap if the stack goes past
|
-fstack-limit-register= Trap if the stack goes past
|
|
|
fstack-limit-symbol=
|
fstack-limit-symbol=
|
Common RejectNegative Joined
|
Common RejectNegative Joined
|
-fstack-limit-symbol= Trap if the stack goes past symbol
|
-fstack-limit-symbol= Trap if the stack goes past symbol
|
|
|
fstack-protector
|
fstack-protector
|
Common Report Var(flag_stack_protect, 1)
|
Common Report Var(flag_stack_protect, 1)
|
Use propolice as a stack protection method
|
Use propolice as a stack protection method
|
|
|
fstack-protector-all
|
fstack-protector-all
|
Common Report RejectNegative Var(flag_stack_protect, 2) VarExists
|
Common Report RejectNegative Var(flag_stack_protect, 2) VarExists
|
Use a stack protection method for every function
|
Use a stack protection method for every function
|
|
|
fstrength-reduce
|
fstrength-reduce
|
Common
|
Common
|
Does nothing. Preserved for backward compatibility.
|
Does nothing. Preserved for backward compatibility.
|
|
|
; Nonzero if we should do (language-dependent) alias analysis.
|
; Nonzero if we should do (language-dependent) alias analysis.
|
; Typically, this analysis will assume that expressions of certain
|
; Typically, this analysis will assume that expressions of certain
|
; types do not alias expressions of certain other types. Only used
|
; types do not alias expressions of certain other types. Only used
|
; if alias analysis (in general) is enabled.
|
; if alias analysis (in general) is enabled.
|
fstrict-aliasing
|
fstrict-aliasing
|
Common Report Var(flag_strict_aliasing)
|
Common Report Var(flag_strict_aliasing)
|
Assume strict aliasing rules apply
|
Assume strict aliasing rules apply
|
|
|
fstrict-overflow
|
fstrict-overflow
|
Common Report Var(flag_strict_overflow)
|
Common Report Var(flag_strict_overflow)
|
Treat signed overflow as undefined
|
Treat signed overflow as undefined
|
|
|
fsyntax-only
|
fsyntax-only
|
Common Report Var(flag_syntax_only)
|
Common Report Var(flag_syntax_only)
|
Check for syntax errors, then stop
|
Check for syntax errors, then stop
|
|
|
ftest-coverage
|
ftest-coverage
|
Common Report Var(flag_test_coverage)
|
Common Report Var(flag_test_coverage)
|
Create data files needed by \"gcov\"
|
Create data files needed by \"gcov\"
|
|
|
fthread-jumps
|
fthread-jumps
|
Common Report Var(flag_thread_jumps)
|
Common Report Var(flag_thread_jumps)
|
Perform jump threading optimizations
|
Perform jump threading optimizations
|
|
|
ftime-report
|
ftime-report
|
Common Report Var(time_report)
|
Common Report Var(time_report)
|
Report the time taken by each compiler pass
|
Report the time taken by each compiler pass
|
|
|
ftls-model=
|
ftls-model=
|
Common Joined RejectNegative
|
Common Joined RejectNegative
|
-ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model
|
-ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model
|
|
|
ftoplevel-reorder
|
ftoplevel-reorder
|
Common Report Var(flag_toplevel_reorder) Init(1)
|
Common Report Var(flag_toplevel_reorder) Init(1)
|
Reorder top level functions, variables, and asms
|
Reorder top level functions, variables, and asms
|
|
|
ftracer
|
ftracer
|
Common Report Var(flag_tracer)
|
Common Report Var(flag_tracer)
|
Perform superblock formation via tail duplication
|
Perform superblock formation via tail duplication
|
|
|
; Zero means that floating-point math operations cannot generate a
|
; Zero means that floating-point math operations cannot generate a
|
; (user-visible) trap. This is the case, for example, in nonstop
|
; (user-visible) trap. This is the case, for example, in nonstop
|
; IEEE 754 arithmetic.
|
; IEEE 754 arithmetic.
|
ftrapping-math
|
ftrapping-math
|
Common Report Var(flag_trapping_math) Init(1)
|
Common Report Var(flag_trapping_math) Init(1)
|
Assume floating-point operations can trap
|
Assume floating-point operations can trap
|
|
|
ftrapv
|
ftrapv
|
Common Report Var(flag_trapv)
|
Common Report Var(flag_trapv)
|
Trap for signed overflow in addition, subtraction and multiplication
|
Trap for signed overflow in addition, subtraction and multiplication
|
|
|
ftree-ccp
|
ftree-ccp
|
Common Report Var(flag_tree_ccp)
|
Common Report Var(flag_tree_ccp)
|
Enable SSA-CCP optimization on trees
|
Enable SSA-CCP optimization on trees
|
|
|
ftree-store-ccp
|
ftree-store-ccp
|
Common Report Var(flag_tree_store_ccp)
|
Common Report Var(flag_tree_store_ccp)
|
Enable SSA-CCP optimization for stores and loads
|
Enable SSA-CCP optimization for stores and loads
|
|
|
ftree-ch
|
ftree-ch
|
Common Report Var(flag_tree_ch)
|
Common Report Var(flag_tree_ch)
|
Enable loop header copying on trees
|
Enable loop header copying on trees
|
|
|
ftree-combine-temps
|
ftree-combine-temps
|
Common Report Var(flag_tree_combine_temps)
|
Common Report Var(flag_tree_combine_temps)
|
Coalesce memory temporaries in the SSA->normal pass
|
Coalesce memory temporaries in the SSA->normal pass
|
|
|
ftree-copyrename
|
ftree-copyrename
|
Common Report Var(flag_tree_copyrename)
|
Common Report Var(flag_tree_copyrename)
|
Replace SSA temporaries with better names in copies
|
Replace SSA temporaries with better names in copies
|
|
|
ftree-copy-prop
|
ftree-copy-prop
|
Common Report Var(flag_tree_copy_prop)
|
Common Report Var(flag_tree_copy_prop)
|
Enable copy propagation on trees
|
Enable copy propagation on trees
|
|
|
ftree-store-copy-prop
|
ftree-store-copy-prop
|
Common Report Var(flag_tree_store_copy_prop)
|
Common Report Var(flag_tree_store_copy_prop)
|
Enable copy propagation for stores and loads
|
Enable copy propagation for stores and loads
|
|
|
ftree-dce
|
ftree-dce
|
Common Report Var(flag_tree_dce)
|
Common Report Var(flag_tree_dce)
|
Enable SSA dead code elimination optimization on trees
|
Enable SSA dead code elimination optimization on trees
|
|
|
ftree-dominator-opts
|
ftree-dominator-opts
|
Common Report Var(flag_tree_dom)
|
Common Report Var(flag_tree_dom)
|
Enable dominator optimizations
|
Enable dominator optimizations
|
|
|
ftree-dse
|
ftree-dse
|
Common Report Var(flag_tree_dse)
|
Common Report Var(flag_tree_dse)
|
Enable dead store elimination
|
Enable dead store elimination
|
|
|
ftree-fre
|
ftree-fre
|
Common Report Var(flag_tree_fre)
|
Common Report Var(flag_tree_fre)
|
Enable Full Redundancy Elimination (FRE) on trees
|
Enable Full Redundancy Elimination (FRE) on trees
|
|
|
ftree-loop-im
|
ftree-loop-im
|
Common Report Var(flag_tree_loop_im) Init(1)
|
Common Report Var(flag_tree_loop_im) Init(1)
|
Enable loop invariant motion on trees
|
Enable loop invariant motion on trees
|
|
|
ftree-loop-linear
|
ftree-loop-linear
|
Common Report Var(flag_tree_loop_linear)
|
Common Report Var(flag_tree_loop_linear)
|
Enable linear loop transforms on trees
|
Enable linear loop transforms on trees
|
|
|
ftree-loop-ivcanon
|
ftree-loop-ivcanon
|
Common Report Var(flag_tree_loop_ivcanon) Init(1)
|
Common Report Var(flag_tree_loop_ivcanon) Init(1)
|
Create canonical induction variables in loops
|
Create canonical induction variables in loops
|
|
|
ftree-loop-optimize
|
ftree-loop-optimize
|
Common Report Var(flag_tree_loop_optimize) Init(1)
|
Common Report Var(flag_tree_loop_optimize) Init(1)
|
Enable loop optimizations on tree level
|
Enable loop optimizations on tree level
|
|
|
ftree-pre
|
ftree-pre
|
Common Report Var(flag_tree_pre)
|
Common Report Var(flag_tree_pre)
|
Enable SSA-PRE optimization on trees
|
Enable SSA-PRE optimization on trees
|
|
|
ftree-salias
|
ftree-salias
|
Common Report Var(flag_tree_salias)
|
Common Report Var(flag_tree_salias)
|
Perform structural alias analysis
|
Perform structural alias analysis
|
|
|
ftree-sink
|
ftree-sink
|
Common Report Var(flag_tree_sink)
|
Common Report Var(flag_tree_sink)
|
Enable SSA code sinking on trees
|
Enable SSA code sinking on trees
|
|
|
ftree-sra
|
ftree-sra
|
Common Report Var(flag_tree_sra)
|
Common Report Var(flag_tree_sra)
|
Perform scalar replacement of aggregates
|
Perform scalar replacement of aggregates
|
|
|
ftree-ter
|
ftree-ter
|
Common Report Var(flag_tree_ter)
|
Common Report Var(flag_tree_ter)
|
Replace temporary expressions in the SSA->normal pass
|
Replace temporary expressions in the SSA->normal pass
|
|
|
ftree-lrs
|
ftree-lrs
|
Common Report Var(flag_tree_live_range_split)
|
Common Report Var(flag_tree_live_range_split)
|
Perform live range splitting during the SSA->normal pass
|
Perform live range splitting during the SSA->normal pass
|
|
|
ftree-vrp
|
ftree-vrp
|
Common Report Var(flag_tree_vrp) Init(0)
|
Common Report Var(flag_tree_vrp) Init(0)
|
Perform Value Range Propagation on trees
|
Perform Value Range Propagation on trees
|
|
|
funit-at-a-time
|
funit-at-a-time
|
Common Report Var(flag_unit_at_a_time)
|
Common Report Var(flag_unit_at_a_time)
|
Compile whole compilation unit at a time
|
Compile whole compilation unit at a time
|
|
|
funroll-loops
|
funroll-loops
|
Common Report Var(flag_unroll_loops)
|
Common Report Var(flag_unroll_loops)
|
Perform loop unrolling when iteration count is known
|
Perform loop unrolling when iteration count is known
|
|
|
funroll-all-loops
|
funroll-all-loops
|
Common Report Var(flag_unroll_all_loops)
|
Common Report Var(flag_unroll_all_loops)
|
Perform loop unrolling for all loops
|
Perform loop unrolling for all loops
|
|
|
; Nonzero means that loop optimizer may assume that the induction variables
|
; Nonzero means that loop optimizer may assume that the induction variables
|
; that control loops do not overflow and that the loops with nontrivial
|
; that control loops do not overflow and that the loops with nontrivial
|
; exit condition are not infinite
|
; exit condition are not infinite
|
funsafe-loop-optimizations
|
funsafe-loop-optimizations
|
Common Report Var(flag_unsafe_loop_optimizations)
|
Common Report Var(flag_unsafe_loop_optimizations)
|
Allow loop optimizations to assume that the loops behave in normal way
|
Allow loop optimizations to assume that the loops behave in normal way
|
|
|
; Nonzero means that unsafe floating-point math optimizations are allowed
|
; Nonzero means that unsafe floating-point math optimizations are allowed
|
; for the sake of speed. IEEE compliance is not guaranteed, and operations
|
; for the sake of speed. IEEE compliance is not guaranteed, and operations
|
; are allowed to assume that their arguments and results are "normal"
|
; are allowed to assume that their arguments and results are "normal"
|
; (e.g., nonnegative for SQRT).
|
; (e.g., nonnegative for SQRT).
|
funsafe-math-optimizations
|
funsafe-math-optimizations
|
Common Report Var(flag_unsafe_math_optimizations)
|
Common Report Var(flag_unsafe_math_optimizations)
|
Allow math optimizations that may violate IEEE or ISO standards
|
Allow math optimizations that may violate IEEE or ISO standards
|
|
|
funswitch-loops
|
funswitch-loops
|
Common Report Var(flag_unswitch_loops)
|
Common Report Var(flag_unswitch_loops)
|
Perform loop unswitching
|
Perform loop unswitching
|
|
|
funwind-tables
|
funwind-tables
|
Common Report Var(flag_unwind_tables)
|
Common Report Var(flag_unwind_tables)
|
Just generate unwind tables for exception handling
|
Just generate unwind tables for exception handling
|
|
|
fvar-tracking
|
fvar-tracking
|
Common Report Var(flag_var_tracking) VarExists
|
Common Report Var(flag_var_tracking) VarExists
|
Perform variable tracking
|
Perform variable tracking
|
|
|
ftree-vectorize
|
ftree-vectorize
|
Common Report Var(flag_tree_vectorize)
|
Common Report Var(flag_tree_vectorize)
|
Enable loop vectorization on trees
|
Enable loop vectorization on trees
|
|
|
ftree-vect-loop-version
|
ftree-vect-loop-version
|
Common Report Var(flag_tree_vect_loop_version) Init(1)
|
Common Report Var(flag_tree_vect_loop_version) Init(1)
|
Enable loop versioning when doing loop vectorization on trees
|
Enable loop versioning when doing loop vectorization on trees
|
|
|
ftree-vectorizer-verbose=
|
ftree-vectorizer-verbose=
|
Common RejectNegative Joined
|
Common RejectNegative Joined
|
-ftree-vectorizer-verbose= Set the verbosity level of the vectorizer
|
-ftree-vectorizer-verbose= Set the verbosity level of the vectorizer
|
|
|
; -fverbose-asm causes extra commentary information to be produced in
|
; -fverbose-asm causes extra commentary information to be produced in
|
; the generated assembly code (to make it more readable). This option
|
; the generated assembly code (to make it more readable). This option
|
; is generally only of use to those who actually need to read the
|
; is generally only of use to those who actually need to read the
|
; generated assembly code (perhaps while debugging the compiler itself).
|
; generated assembly code (perhaps while debugging the compiler itself).
|
; -fno-verbose-asm, the default, causes the extra information
|
; -fno-verbose-asm, the default, causes the extra information
|
; to not be added and is useful when comparing two assembler files.
|
; to not be added and is useful when comparing two assembler files.
|
fverbose-asm
|
fverbose-asm
|
Common Report Var(flag_verbose_asm)
|
Common Report Var(flag_verbose_asm)
|
Add extra commentary to assembler output
|
Add extra commentary to assembler output
|
|
|
fvisibility=
|
fvisibility=
|
Common Joined RejectNegative
|
Common Joined RejectNegative
|
-fvisibility=[default|internal|hidden|protected] Set the default symbol visibility
|
-fvisibility=[default|internal|hidden|protected] Set the default symbol visibility
|
|
|
|
|
fvpt
|
fvpt
|
Common Report Var(flag_value_profile_transformations)
|
Common Report Var(flag_value_profile_transformations)
|
Use expression value profiles in optimizations
|
Use expression value profiles in optimizations
|
|
|
fweb
|
fweb
|
Common Report Var(flag_web) Init(2)
|
Common Report Var(flag_web) Init(2)
|
Construct webs and split unrelated uses of single variable
|
Construct webs and split unrelated uses of single variable
|
|
|
fwhole-program
|
fwhole-program
|
Common Report Var(flag_whole_program) Init(0)
|
Common Report Var(flag_whole_program) Init(0)
|
Perform whole program optimizations
|
Perform whole program optimizations
|
|
|
fwrapv
|
fwrapv
|
Common Report Var(flag_wrapv)
|
Common Report Var(flag_wrapv)
|
Assume signed arithmetic overflow wraps around
|
Assume signed arithmetic overflow wraps around
|
|
|
fzero-initialized-in-bss
|
fzero-initialized-in-bss
|
Common Report Var(flag_zero_initialized_in_bss) Init(1)
|
Common Report Var(flag_zero_initialized_in_bss) Init(1)
|
Put zero initialized data in the bss section
|
Put zero initialized data in the bss section
|
|
|
g
|
g
|
Common JoinedOrMissing
|
Common JoinedOrMissing
|
Generate debug information in default format
|
Generate debug information in default format
|
|
|
gcoff
|
gcoff
|
Common JoinedOrMissing Negative(gdwarf-2)
|
Common JoinedOrMissing Negative(gdwarf-2)
|
Generate debug information in COFF format
|
Generate debug information in COFF format
|
|
|
gdwarf-2
|
gdwarf-2
|
Common JoinedOrMissing Negative(gstabs)
|
Common JoinedOrMissing Negative(gstabs)
|
Generate debug information in DWARF v2 format
|
Generate debug information in DWARF v2 format
|
|
|
ggdb
|
ggdb
|
Common JoinedOrMissing
|
Common JoinedOrMissing
|
Generate debug information in default extended format
|
Generate debug information in default extended format
|
|
|
gstabs
|
gstabs
|
Common JoinedOrMissing Negative(gstabs+)
|
Common JoinedOrMissing Negative(gstabs+)
|
Generate debug information in STABS format
|
Generate debug information in STABS format
|
|
|
gstabs+
|
gstabs+
|
Common JoinedOrMissing Negative(gvms)
|
Common JoinedOrMissing Negative(gvms)
|
Generate debug information in extended STABS format
|
Generate debug information in extended STABS format
|
|
|
gvms
|
gvms
|
Common JoinedOrMissing Negative(gxcoff)
|
Common JoinedOrMissing Negative(gxcoff)
|
Generate debug information in VMS format
|
Generate debug information in VMS format
|
|
|
gxcoff
|
gxcoff
|
Common JoinedOrMissing Negative(gxcoff+)
|
Common JoinedOrMissing Negative(gxcoff+)
|
Generate debug information in XCOFF format
|
Generate debug information in XCOFF format
|
|
|
gxcoff+
|
gxcoff+
|
Common JoinedOrMissing Negative(gcoff)
|
Common JoinedOrMissing Negative(gcoff)
|
Generate debug information in extended XCOFF format
|
Generate debug information in extended XCOFF format
|
|
|
o
|
o
|
Common Joined Separate
|
Common Joined Separate
|
-o Place output into
|
-o Place output into
|
|
|
p
|
p
|
Common Var(profile_flag)
|
Common Var(profile_flag)
|
Enable function profiling
|
Enable function profiling
|
|
|
pedantic
|
pedantic
|
Common Var(pedantic)
|
Common Var(pedantic)
|
Issue warnings needed for strict compliance to the standard
|
Issue warnings needed for strict compliance to the standard
|
|
|
pedantic-errors
|
pedantic-errors
|
Common
|
Common
|
Like -pedantic but issue them as errors
|
Like -pedantic but issue them as errors
|
|
|
quiet
|
quiet
|
Common Var(quiet_flag)
|
Common Var(quiet_flag)
|
Do not display functions compiled or elapsed time
|
Do not display functions compiled or elapsed time
|
|
|
version
|
version
|
Common Var(version_flag)
|
Common Var(version_flag)
|
Display the compiler's version
|
Display the compiler's version
|
|
|
w
|
w
|
Common Var(inhibit_warnings)
|
Common Var(inhibit_warnings)
|
Suppress warnings
|
Suppress warnings
|
|
|
; This comment is to ensure we retain the blank line above.
|
; This comment is to ensure we retain the blank line above.
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