; Options for the language- and target-independent parts of the compiler.
-; Copyright (C) 2003-2016 Free Software Foundation, Inc.
+; Copyright (C) 2003-2017 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
Variable
int flag_complex_method = 1
-; Nonzero if subexpressions must be evaluated from left-to-right.
-Variable
-int flag_evaluation_order = 0
-
; Language specific warning pass for unused results.
Variable
bool flag_warn_unused_result = false
Wshadow
Common Var(warn_shadow) Warning
-Warn when one local variable shadows another.
+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 UInteger Var(warn_stack_usage) Init(-1) Warning
-Warn if stack usage might be larger than specified amount.
+Common Joined RejectNegative UInteger Var(warn_stack_usage) Warning
+-Wstack-usage=<number> Warn if stack usage might be larger than specified amount.
Wstrict-aliasing
Common Warning
dumpversion
Driver
+dumpfullversion
+Driver
+
e
Driver Joined Separate
; 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.
+; 11: The version of the ABI that corrects mangling of sizeof... expressions
+; and introduces new inheriting constructor handling.
; Default in G++ 7.
;
; Additional positive integers will be assigned as new versions of
falign-functions=
Common RejectNegative Joined UInteger Var(align_functions)
+flimit-function-alignment
+Common Report Var(flag_limit_function_alignment) Optimization Init(0)
+
falign-jumps
Common Report Var(align_jumps,0) Optimization UInteger
Align labels which are only reached by jumping.
Common Report
This switch is deprecated; use -fsanitize-recover= instead.
+fsanitize-address-use-after-scope
+Common Driver Report Var(flag_sanitize_address_use_after_scope) Init(0)
+
fsanitize-undefined-trap-on-error
Common Driver Report Var(flag_sanitize_undefined_trap_on_error) Init(0)
Use trap instead of a library function for undefined behavior sanitization.
freport-bug
Common Driver Var(flag_report_bug)
Collect and dump debug information into temporary file if ICE in C/C++
-compiler occured.
+compiler occurred.
fdump-internal-locations
Common Var(flag_dump_locations) Init(0)
Perform a number of minor, expensive optimizations.
fexcess-precision=
-Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT)
+Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT) SetByCombined
-fexcess-precision=[fast|standard] Specify handling of excess floating-point precision.
Enum
EnumValue
Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD)
+; 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
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.
+-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)
Common Report Var(flag_strict_volatile_bitfields) Init(-1) Optimization
Force bitfield accesses to match their type width.
+fstore-merging
+Common Report Var(flag_store_merging) Optimization
+Merge adjacent stores.
+
fguess-branch-probability
Common Report Var(flag_guess_branch_prob) Optimization
Enable guessing of branch probabilities.
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.
+-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)
Convert conditional jumps in innermost loops to branchless equivalents.
ftree-loop-if-convert-stores
-Common Report Var(flag_tree_loop_if_convert_stores) Optimization
-Also if-convert conditional jumps containing memory writes.
+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,
Perform cloning to make Interprocedural constant propagation stronger.
fipa-cp-alignment
-Common Report Var(flag_ipa_cp_alignment) Optimization
-Perform alignment discovery and propagation to make Interprocedural constant propagation stronger.
+Common Ignore
+Does nothing. Preserved for backward compatibility.
fipa-bit-cp
Common Report Var(flag_ipa_bit_cp) Optimization
Perform Identical Code Folding for functions.
fipa-icf-variables
-Common Report Var(flag_ipa_icf_variables)
+Common Report Var(flag_ipa_icf_variables) Optimization
Perform Identical Code Folding for variables.
fipa-reference
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.
+-fira-algorithm=[CB|priority] Set the used IRA algorithm.
Enum
Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs)
fira-region=
Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) Optimization
--fira-region=[one|all|mixed] Set regions for IRA.
+-fira-region=[one|all|mixed] Set regions for IRA.
Enum
Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs)
fprofile-update=
Common Joined RejectNegative Enum(profile_update) Var(flag_profile_update) Init(PROFILE_UPDATE_SINGLE)
--fprofile-update=[single|atomic] Set the profile update method.
+-fprofile-update=[single|atomic|prefer-atomic] Set the profile update method.
Enum
Name(profile_update) Type(enum profile_update) UnknownError(unknown profile update method %qs)
EnumValue
Enum(profile_update) String(atomic) Value(PROFILE_UPDATE_ATOMIC)
+EnumValue
+Enum(profile_update) String(prefer-atomic) Value(PROFILE_UPDATE_PREFER_ATOMIC)
+
fprofile-generate
Common
Enable common options for generating profile info for profile feedback directed optimizations.
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.
+-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)
Common Report Var(flag_selective_scheduling2) Optimization
Run selective scheduling after reload.
-fself-test
-Common Undocumented Var(flag_self_test)
-Run self-tests.
+fself-test=
+Common Undocumented Joined Var(flag_self_test)
+Run self-tests, using the given path to locate test files.
fsel-sched-pipelining
Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization
Assume strict aliasing rules apply.
fstrict-overflow
-Common Report Var(flag_strict_overflow) Optimization
-Treat signed overflow as undefined.
+Common NegativeAlias Alias(fwrapv)
+Treat signed overflow as undefined. Negated as -fwrapv.
fsync-libcalls
Common Report Var(flag_sync_libcalls) Init(1)
fisolate-erroneous-paths-attribute
Common Report Var(flag_isolate_erroneous_paths_attribute) Optimization
-Detect paths that trigger erroneous or undefined behavior due a null value
+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-parallelize-loops=
Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) Optimization
-Enable automatic parallelization of loops.
+-ftree-parallelize-loops=<number> Enable automatic parallelization of loops.
ftree-phiprop
Common Report Var(flag_tree_phiprop) Init(1) Optimization
Common Report Var(flag_unswitch_loops) Optimization
Perform loop unswitching.
+fsplit-loops
+Common Report Var(flag_split_loops) Optimization
+Perform loop splitting.
+
funwind-tables
Common Report Var(flag_unwind_tables) Optimization
Just generate unwind tables for exception handling.
; will be set according to optimize, debug_info_level and debug_hooks
; in process_options ().
fvar-tracking
-Common Report Var(flag_var_tracking) Init(2) Optimization
+Common Report Var(flag_var_tracking) Init(2) PerFunction
Perform variable tracking.
; Positive if we should track variables at assignments, negative if
; annotations. When flag_var_tracking_assignments ==
; AUTODETECT_VALUE it will be set according to flag_var_tracking.
fvar-tracking-assignments
-Common Report Var(flag_var_tracking_assignments) Init(2) Optimization
+Common Report Var(flag_var_tracking_assignments) Init(2) 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 Report Var(flag_var_tracking_assignments_toggle) Optimization
+Common Report Var(flag_var_tracking_assignments_toggle) PerFunction
Toggle -fvar-tracking-assignments.
; Positive if we should track uninitialized variables, negative if
; 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
+Common Report Var(flag_var_tracking_uninit) PerFunction
Perform variable tracking and also tag variables that are uninitialized.
ftree-vectorize
fvect-cost-model=
Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT) Optimization
Specifies the cost model for vectorization.
+-fvect-cost-model=[unlimited|dynamic|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
-Specifies the vectorization cost model for code marked with a simd directive.
+-fsimd-cost-model=[unlimited|dynamic|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)
Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP)
fvect-cost-model
-Common RejectNegative Alias(fvect-cost-model=,dynamic)
+Common Alias(fvect-cost-model=,dynamic,unlimited)
Enables the dynamic vectorizer cost model. Preserved for backward compatibility.
-fno-vect-cost-model
-Common RejectNegative Alias(fvect-cost-model=,unlimited)
-Enables the unlimited vectorizer cost model. Preserved for backward compatibility.
-
ftree-vect-loop-version
Common Ignore
Does nothing. Preserved for backward compatibility.
Put zero initialized data in the bss section.
g
-Common JoinedOrMissing
+Common Driver JoinedOrMissing
Generate debug information in default format.
gcoff
-Common JoinedOrMissing Negative(gdwarf)
+Common Driver JoinedOrMissing Negative(gdwarf)
Generate debug information in COFF format.
+gno-column-info
+Common Driver RejectNegative Var(debug_column_info,0) Init(0)
+Don't record DW_AT_decl_column and DW_AT_call_column in DWARF.
+
+gcolumn-info
+Common Driver RejectNegative Var(debug_column_info,1)
+Record DW_AT_decl_column and DW_AT_call_column in DWARF.
+
gdwarf
-Common JoinedOrMissing Negative(gdwarf-)
+Common Driver JoinedOrMissing Negative(gdwarf-)
Generate debug information in default version of DWARF format.
gdwarf-
-Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
+Common Driver Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
Generate debug information in DWARF v2 (or later) format.
ggdb
-Common JoinedOrMissing
+Common Driver JoinedOrMissing
Generate debug information in default extended format.
gno-pubnames
-Common Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1)
+Common Driver Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1)
Don't generate DWARF pubnames and pubtypes sections.
gpubnames
-Common Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1)
+Common Driver Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1)
Generate DWARF pubnames and pubtypes sections.
ggnu-pubnames
-Common Negative(gno-pubnames) Var(debug_generate_pub_sections, 2)
+Common Driver Negative(gno-pubnames) Var(debug_generate_pub_sections, 2)
Generate DWARF pubnames and pubtypes sections with GNU extensions.
gno-record-gcc-switches
-Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1)
+Common Driver 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)
+Common Driver RejectNegative Var(dwarf_record_gcc_switches,1)
Record gcc command line switches in DWARF DW_AT_producer.
gno-split-dwarf
Generate debug information in separate .dwo files.
gstabs
-Common JoinedOrMissing Negative(gstabs+)
+Common Driver JoinedOrMissing Negative(gstabs+)
Generate debug information in STABS format.
gstabs+
-Common JoinedOrMissing Negative(gvms)
+Common Driver JoinedOrMissing Negative(gvms)
Generate debug information in extended STABS format.
gno-strict-dwarf
-Common RejectNegative Var(dwarf_strict,0) Init(0)
+Common Driver RejectNegative Var(dwarf_strict,0) Init(0)
Emit DWARF additions beyond selected version.
gstrict-dwarf
-Common Report RejectNegative Var(dwarf_strict,1)
+Common Driver Report RejectNegative Var(dwarf_strict,1)
Don't emit DWARF additions beyond selected version.
gtoggle
-Common Report Var(flag_gtoggle)
+Common Driver Report Var(flag_gtoggle)
Toggle debug information generation.
gvms
-Common JoinedOrMissing Negative(gxcoff)
+Common Driver JoinedOrMissing Negative(gxcoff)
Generate debug information in VMS format.
gxcoff
-Common JoinedOrMissing Negative(gxcoff+)
+Common Driver JoinedOrMissing Negative(gxcoff+)
Generate debug information in XCOFF format.
gxcoff+
-Common JoinedOrMissing Negative(gcoff)
+Common Driver JoinedOrMissing Negative(gcoff)
Generate debug information in extended XCOFF format.
Enum
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