Variable
int optimize_size
+Variable
+int optimize_debug
+
; Not used directly to control optimizations, only to save -Ofast
; setting for "optimize" attributes.
Variable
Variable
unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT
-Variable
-enum vect_verbosity_levels user_vect_verbosity_level = MAX_VERBOSITY_LEVEL
-
; Type of stack check.
Variable
enum stack_check_type flag_stack_check = NO_STACK_CHECK
-no-standard-libraries
Driver Alias(nostdlib)
+-no-sysroot-suffix
+Driver Var(no_sysroot_suffix)
+
-no-warnings
Common Alias(w)
Driver Alias(pass-exit-codes)
-pedantic
-Common Alias(pedantic)
+Common Alias(Wpedantic)
-pedantic-errors
Common Alias(pedantic-errors)
-print-multi-os-directory
Driver Alias(print-multi-os-directory)
+-print-multiarch
+Driver Alias(print-multiarch)
+
-print-prog-name
Driver Separate Alias(print-prog-name=)
Common Optimization
Optimize for speed disregarding exact standards compliance
+Og
+Common Optimization
+Optimize for debugging experience rather than speed or size
+
Q
Driver
Warn if the loop cannot be optimized due to nontrivial assumptions.
Wmissing-noreturn
-Common Var(warn_missing_noreturn) Warning
-Warn about functions which might be candidates for __attribute__((noreturn))
+Common Alias(Wsuggest-attribute=noreturn)
Woverflow
Common Var(warn_overflow) Init(1) Warning
Common Var(warn_padded) Warning
Warn when padding is required to align structure members
+Wpedantic
+Common Var(pedantic) Warning
+Issue warnings needed for strict compliance to the standard
+
Wshadow
Common Var(warn_shadow) Warning
Warn when one local variable shadows another
Warn about code which might break strict aliasing rules
Wstrict-aliasing=
-Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Init(-1) Warning
+Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning
Warn about code which might break strict aliasing rules
Wstrict-overflow
Warn about optimizations that assume that signed overflow is undefined
Wstrict-overflow=
-Common Joined RejectNegative UInteger Var(warn_strict_overflow) Init(-1) Warning
+Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning
Warn about optimizations that assume that signed overflow is undefined
Wsuggest-attribute=const
Common Var(warn_suggest_attribute_noreturn) Warning
Warn about functions which might be candidates for __attribute__((noreturn))
-Wswitch
-Common Var(warn_switch) Warning
-Warn about enumerated switches, with no default, missing a case
-
-Wswitch-default
-Common Var(warn_switch_default) Warning
-Warn about enumerated switches missing a \"default:\" statement
-
-Wswitch-enum
-Common Var(warn_switch_enum) Warning
-Warn about all enumerated switches missing a specific case
-
Wsystem-headers
Common Var(warn_system_headers) Warning
Do not suppress warnings from system headers
Warn whenever a trampoline is generated
Wtype-limits
-Common Var(warn_type_limits) Init(-1) Warning
+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) Init(-1) Warning
+Common Var(warn_uninitialized) Warning EnabledBy(Wextra)
Warn about uninitialized automatic variables
Wmaybe-uninitialized
-Common Var(warn_maybe_uninitialized) Warning
+Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized)
Warn about maybe uninitialized automatic variables
Wunreachable-code
Enable all -Wunused- warnings
Wunused-but-set-parameter
-Common Var(warn_unused_but_set_parameter) Init(-1) Warning
+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) Init(-1) Warning
+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) Init(-1) Warning
+Common Var(warn_unused_function) Warning EnabledBy(Wunused)
Warn when a function is unused
Wunused-label
-Common Var(warn_unused_label) Init(-1) Warning
+Common Var(warn_unused_label) Warning EnabledBy(Wunused)
Warn when a label is unused
Wunused-parameter
-Common Var(warn_unused_parameter) Init(-1) Warning
+Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra)
Warn when a function parameter is unused
Wunused-value
-Common Var(warn_unused_value) Init(-1) Warning
+Common Var(warn_unused_value) Warning EnabledBy(Wunused)
Warn when an expression value is unused
Wunused-variable
-Common Var(warn_unused_variable) Init(-1) Warning
+Common Var(warn_unused_variable) Warning EnabledBy(Wunused)
Warn when a variable is unused
Wcoverage-mismatch
; argument.
; First selectable in G++ 4.7.
;
+; 7: The version of the ABI that treats nullptr_t as a builtin type.
+; First selectable in G++ 4.8.
; Additional positive integers will be assigned as new versions of
; the ABI become the default version of the ABI.
fabi-version=
Common Ignore
Does nothing. Preserved for backward compatibility.
+faddress-sanitizer
+Common Report Var(flag_asan)
+Enable AddressSanitizer, a memory error detector
+
fasynchronous-unwind-tables
Common Report Var(flag_asynchronous_unwind_tables) Optimization
Generate unwind tables that are exact at each instruction boundary
Map one directory name to another in debug information
fdebug-types-section
-Common Report Var(flag_debug_types_section) Init(1)
+Common Report Var(flag_debug_types_section) Init(0)
Output .debug_types section when using DWARF v4 debuginfo.
; Nonzero for -fdefer-pop: don't pop args after each function call
Common Report Var(flag_delayed_branch) Optimization
Attempt to fill delay slots of branch instructions
+fdelete-dead-exceptions
+Common Report Var(flag_delete_dead_exceptions) Init(0)
+Delete dead instructions that may throw exceptions
+
fdelete-null-pointer-checks
Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization
Delete useless null pointer checks
EnumValue
Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE)
+fdiagnostics-show-caret
+Common Var(flag_diagnostics_show_caret) Init(1)
+Show the source line with a caret indicating the column
+
fdiagnostics-show-option
Common Var(flag_diagnostics_show_option) Init(1)
Amend appropriate diagnostic messages with the command line option that controls them
Common Report Var(flag_graphite_identity) Optimization
Enable Graphite Identity transformation
+fhoist-adjacent-loads
+Common Report Var(flag_hoist_adjacent_loads) Optimization
+Enable hoisting adjacent loads to encourage generating conditional move
+instructions
+
floop-parallelize-all
Common Report Var(flag_loop_parallelize_all) Optimization
Mark all loops as parallel
Enable support for GNU transactional memory
floop-flatten
-Common Report Var(flag_loop_flatten) Optimization
-Enable Loop Flattening transformation
+Common Ignore
+Does nothing. Preserved for backward compatibility.
+
+floop-nest-optimize
+Common Report Var(flag_loop_optimize_isl) Optimization
+Enable the ISL based loop nest optimizer
fstrict-volatile-bitfields
Common Report Var(flag_strict_volatile_bitfields) Init(-1)
Common Report Var(flag_if_conversion2) Optimization
Perform conversion of conditional jumps to conditional execution
+fstack-reuse=
+Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL)
+-fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables.
+
+Enum
+Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs)
+
+EnumValue
+Enum(stack_reuse_level) String(all) Value(SR_ALL)
+
+EnumValue
+Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS)
+
+EnumValue
+Enum(stack_reuse_level) String(none) Value(SR_NONE)
+
ftree-loop-if-convert
Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization
Convert conditional jumps in innermost loops to branchless equivalents
Common Report Var(flag_indirect_inlining)
Perform indirect inlining
-; Nonzero means that functions declared `inline' will be treated
-; as `static'. Prevents generation of zillions of copies of unused
-; static inline functions; instead, `inlines' are written out
-; only when actually used. Used in conjunction with -g. Also
-; does the right thing with #pragma interface.
+; General flag to enable inlining. Specifying -fno-inline will disable
+; all inlining apart from always-inline functions.
finline
-Common Report Var(flag_no_inline,0) Init(0)
-Pay attention to the \"inline\" keyword
+Common Report Var(flag_no_inline,0) Init(0) Optimization
+Enable inlining of function declared \"inline\", disabling disables all inlining
finline-small-functions
Common Report Var(flag_inline_small_functions) Optimization
-Integrate simple functions into their callers when code size is known to not growth
+Integrate functions into their callers when code size is known not to grow
finline-functions
Common Report Var(flag_inline_functions) Optimization
-Integrate simple functions into their callers
+Integrate functions not declared \"inline\" into their callers when profitable
finline-functions-called-once
Common Report Var(flag_inline_functions_called_once) Optimization
-Integrate functions called once into their callers
+Integrate functions only required by their single caller
finline-limit-
Common RejectNegative Joined Alias(finline-limit=)
Discover readonly and non addressable static variables
fipa-matrix-reorg
-Common Report Var(flag_ipa_matrix_reorg) Optimization
-Perform matrix layout flattening and transposing based
-on profiling information.
+Common Ignore
+Does nothing. Preserved for backward compatibility.
fipa-struct-reorg
Common Ignore
EnumValue
Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED)
+fira-hoist-pressure
+Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization
+Use IRA based register pressure calculation
+in RTL hoist optimizations.
+
fira-loop-pressure
Common Report Var(flag_ira_loop_pressure)
Use IRA based register pressure calculation
flto-partition=1to1
Common Var(flag_lto_partition_1to1)
-Partition functions and vars at linktime based on object files they originate from
+Partition symbols and vars at linktime based on object files they originate from
flto-partition=balanced
Common Var(flag_lto_partition_balanced)
Partition functions and vars at linktime into approximately same sized buckets
+flto-partition=max
+Common Var(flag_lto_partition_max)
+Put every symbol into separate partition
+
flto-partition=none
Common Var(flag_lto_partition_none)
Disable partioning and streaming
-flto-compression-level=<number> Use zlib compression level <number> for IL
flto-report
-Common Report Var(flag_lto_report) Init(0) Optimization
+Common Report Var(flag_lto_report) Init(0)
Report various link-time optimization statistics
fmath-errno
Common Report Var(mem_report)
Report on permanent memory allocation
+fmem-report-wpa
+Common Report Var(mem_report_wpa)
+Report on permanent memory allocation in WPA only
+
; This will attempt to merge constant section constants, if 1 only
; string constants and constants from constant pool, if 2 also constant
; variables.
Common Report Var(flag_omit_frame_pointer) Optimization
When possible do not generate stack frames
+fopt-info
+Common Report Var(flag_opt_info) Optimization
+Enable all optimization info dumps on stderr
+
+fopt-info-
+Common Joined RejectNegative Var(common_deferred_options) Defer
+-fopt-info[-<type>=filename] Dump compiler optimization details
+
foptimize-register-move
Common Report Var(flag_regmove) Optimization
Do the full register move optimization pass
Enable an RTL peephole pass before sched2
fPIC
-Common Report Var(flag_pic,2)
+Common Report Var(flag_pic,2) Negative(fPIE)
Generate position-independent code if possible (large mode)
fPIE
-Common Report Var(flag_pie,2)
+Common Report Var(flag_pie,2) Negative(fpic)
Generate position-independent code for executables if possible (large mode)
fpic
-Common Report Var(flag_pic,1)
+Common Report Var(flag_pic,1) Negative(fpie)
Generate position-independent code if possible (small mode)
fpie
-Common Report Var(flag_pie,1)
+Common Report Var(flag_pie,1) Negative(fPIC)
Generate position-independent code for executables if possible (small mode)
fplugin=
Common Report Var(flag_profile_values)
Insert code to profile values of expressions
+fprofile-report
+Common Report Var(profile_report)
+Report on consistency of profile
+
frandom-seed
Common Var(common_deferred_options) Defer
Common Report Var(flag_strict_overflow)
Treat signed overflow as undefined
+fsync-libcalls
+Common Report Var(flag_sync_libcalls) Init(1)
+Implement __atomic operations via libcalls to legacy __sync functions
+
fsyntax-only
Common Report Var(flag_syntax_only)
Check for syntax errors, then stop
Common Report Var(flag_tree_ch) Optimization
Enable loop header copying on trees
+ftree-coalesce-inlined-vars
+Common Report Var(flag_ssa_coalesce_vars,1) Init(2) RejectNegative Optimization
+Enable coalescing of copy-related user variables that are inlined
+
+ftree-coalesce-vars
+Common Report Var(flag_ssa_coalesce_vars,2) Optimization
+Enable coalescing of all copy-related user variables
+
ftree-copyrename
Common Report Var(flag_tree_copyrename) Optimization
Replace SSA temporaries with better names in copies
Common Report Var(flag_tree_pre) Optimization
Enable SSA-PRE optimization on trees
+ftree-partial-pre
+Common Report Var(flag_tree_partial_pre) Optimization
+In SSA-PRE optimization on trees, enable partial-partial redundancy elimination
+
ftree-pta
Common Report Var(flag_tree_pta) Init(1) Optimization
Perform function-local points-to analysis on trees.
Common Report Var(flag_tree_sink) Optimization
Enable SSA code sinking on trees
+ftree-slsr
+Common Report Var(flag_tree_slsr) Optimization
+Perform straight-line strength reduction
+
ftree-sra
Common Report Var(flag_tree_sra) Optimization
Perform scalar replacement of aggregates
Common Report Var(flag_var_tracking_assignments_toggle) Optimization
Toggle -fvar-tracking-assignments
+; Positive if we should track uninitialized variables, negative if
+; we should run the var-tracking pass only to discard debug
+; annotations. When flag_var_tracking_uninit == AUTODETECT_VALUE it
+; will be set according to flag_var_tracking.
fvar-tracking-uninit
Common Report Var(flag_var_tracking_uninit) Optimization
Perform variable tracking and also tag variables that are uninitialized
Common Report Var(flag_tree_vectorize) Optimization
Enable loop vectorization on trees
+ftree-vectorizer-verbose=
+Common RejectNegative Joined UInteger Var(common_deferred_options) Defer
+-ftree-vectorizer-verbose=<number> This switch is deprecated. Use -fopt-info instead.
+
ftree-slp-vectorize
Common Report Var(flag_tree_slp_vectorize) Init(2) Optimization
Enable basic block vectorization (SLP) on trees
Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization
Enable loop versioning when doing loop vectorization on trees
-ftree-vectorizer-verbose=
-Common RejectNegative Joined UInteger
--ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer
-
ftree-scev-cprop
Common Report Var(flag_tree_scev_cprop) Init(1) Optimization
Enable copy propagation of scalar-evolution information.
Generate debug information in COFF format
gdwarf-
-Common Joined UInteger Var(dwarf_version) Init(2) Negative(gstabs)
+Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
Generate debug information in DWARF v2 (or later) format
ggdb
Common JoinedOrMissing
Generate debug information in default extended format
+gno-pubnames
+Common RejectNegative Var(debug_generate_pub_sections, 0) Init(-1)
+Don't generate DWARF pubnames and pubtypes sections.
+
+gpubnames
+Common RejectNegative Var(debug_generate_pub_sections, 1)
+Generate DWARF pubnames and pubtypes sections.
+
gno-record-gcc-switches
-Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(0)
+Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1)
Don't record gcc command line switches in DWARF DW_AT_producer.
grecord-gcc-switches
Common RejectNegative Var(dwarf_record_gcc_switches,1)
Record gcc command line switches in DWARF DW_AT_producer.
+gno-split-dwarf
+Common Driver RejectNegative Var(dwarf_split_debug_info,0) Init(0)
+Don't generate debug information in separate .dwo files
+
+gsplit-dwarf
+Common Driver RejectNegative Var(dwarf_split_debug_info,1)
+Generate debug information in separate .dwo files
+
gstabs
Common JoinedOrMissing Negative(gstabs+)
Generate debug information in STABS format
Generate debug information in extended STABS format
gno-strict-dwarf
-Common RejectNegative Var(dwarf_strict,0) Init(-1)
+Common RejectNegative Var(dwarf_strict,0) Init(0)
Emit DWARF additions beyond selected version
gstrict-dwarf
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
Driver Var(pass_exit_codes)
pedantic
-Common Var(pedantic)
-Issue warnings needed for strict compliance to the standard
+Common Alias(Wpedantic)
pedantic-errors
Common Var(flag_pedantic_errors)
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)
Driver
; Documented for Go, but always accepted by driver.
+static-libasan
+Driver
+
symbolic
Driver
projects / gcc.git / blobdiff