Common Var(warn_overflow) Init(1) Warning
Warn about overflow in arithmetic expressions
+Wlto-type-mismatch
+Common Var(warn_lto_type_mismatch) Init(1) Warning
+During link time optimization warn about mismatched types of global declarations
+
Wpacked
Common Var(warn_packed) Warning
Warn when the packed attribute has no effect on struct layout
;
; 1: The version of the ABI first used in G++ 3.2. No longer selectable.
;
-; 2: The version of the ABI first used in G++ 3.4 (and current default).
+; 2: The version of the ABI first used in G++ 3.4, and the default
+; until GCC 4.9.
;
; 3: The version of the ABI that fixes the missing underscore
; in template non-type arguments of pointer type.
;
; 8: The version of the ABI that corrects the substitution behavior of
; function types with function-cv-qualifiers.
-; First selectable in G++ 4.9.
+; First selectable in G++ 4.9 and default in G++ 5.
+;
+; 9: The version of the ABI that mangles attributes that affect type
+; identity, such as ia32 calling convention attributes (stdcall, etc.)
+; Default in G++ 6 (set in c_common_post_options).
;
; Additional positive integers will be assigned as new versions of
; the ABI become the default version of the ABI.
Common Joined RejectNegative Var(common_deferred_options) Defer
-fasan-shadow-offset=<number> Use custom shadow memory offset.
+fsanitize-sections=
+Common Joined RejectNegative Var(common_deferred_options) Defer
+-fsanitize-sections=<sec1,sec2,...> Sanitize global variables
+in user-defined sections.
+
fsanitize-recover=
Common Report Joined
After diagnosing undefined behavior attempt to continue execution
This switch is deprecated; use -fsanitize-recover= instead
fsanitize-undefined-trap-on-error
-Common Report Var(flag_sanitize_undefined_trap_on_error) Init(0)
+Common Driver Report Var(flag_sanitize_undefined_trap_on_error) Init(0)
Use trap instead of a library function for undefined behavior sanitization
fasynchronous-unwind-tables
Delete dead instructions that may throw exceptions
fdelete-null-pointer-checks
-Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization
+Common Report Var(flag_delete_null_pointer_checks) Init(-1) Optimization
Delete useless null pointer checks
fdevirtualize-at-ltrans
Collect and dump debug information into temporary file if ICE in C/C++
compiler occured.
+fdump-internal-locations
+Common Var(flag_dump_locations) Init(0)
+Dump detailed information on GCC's internal representation of source code locations
+
fdump-passes
Common Var(flag_dump_passes) Init(0)
Dump optimization passes
feliminate-unused-debug-symbols
Common Report Var(flag_debug_only_used_symbols)
-Perform unused type elimination in debug info
+Perform unused symbol elimination in debug info
feliminate-unused-debug-types
Common Report Var(flag_eliminate_unused_debug_types) Init(1)
Perform a forward propagation pass on RTL
ffp-contract=
-Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST)
+Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) Optimization
-ffp-contract=[off|on|fast] Perform floating-point expression contraction.
Enum
; This option is not documented yet as its semantics will change.
fgraphite
-Common Report Var(flag_graphite) Opitmization
+Common Report Var(flag_graphite) Optimization
Enable in and out of Graphite representation
fgraphite-identity
Perform conversion of conditional jumps to conditional execution
fstack-reuse=
-Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL)
+Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL) Optimization
-fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables.
Enum
Common Report Var(flag_ipa_cp_clone) Optimization
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
+
fipa-profile
Common Report Var(flag_ipa_profile) Init(0) Optimization
Perform interprocedural profile propagation
; string constants and constants from constant pool, if 2 also constant
; variables.
fmerge-all-constants
-Common Report Var(flag_merge_constants,2) Init(1) Optimization
+Common Report Var(flag_merge_constants,2) Init(1)
Attempt to merge identical constants and constant variables
fmerge-constants
-Common Report Var(flag_merge_constants,1) Optimization
+Common Report Var(flag_merge_constants,1)
Attempt to merge identical constants across compilation units
fmerge-debug-strings
Generate position-independent code if possible (large mode)
fPIE
-Common Report Var(flag_pie,2) Negative(fpic)
+Common Report Var(flag_pie,2) Negative(fpic) Init(-1)
Generate position-independent code for executables if possible (large mode)
fpic
Generate position-independent code if possible (small mode)
fpie
-Common Report Var(flag_pie,1) Negative(fPIC)
+Common Report Var(flag_pie,1) Negative(fPIC) Init(-1)
Generate position-independent code for executables if possible (small mode)
+fplt
+Common Report Var(flag_plt) Init(1) Optimization
+Use PLT for PIC calls (-fno-plt: load the address from GOT at call site)
+
fplugin=
Common Joined RejectNegative Var(common_deferred_options) Defer
Specify a plugin to load
Common Ignore
Does nothing. Preserved for backward compatibility.
+flifetime-dse
+Common Report Var(flag_lifetime_dse) Init(1) Optimization
+Tell DSE that the storage for a C++ object is dead when the constructor
+starts and when the destructor finishes.
+
flive-range-shrinkage
Common Report Var(flag_live_range_shrinkage) Init(0) Optimization
Relief of register pressure through live range shrinkage
Common Report Var(flag_ssa_phiopt) Optimization
Optimize conditional patterns using SSA PHI nodes
+fstdarg-opt
+Common Report Var(flag_stdarg_opt) Init(1) Optimization
+Optimize amount of stdarg registers saved to stack at start of function
+
fvariable-expansion-in-unroller
Common Report Var(flag_variable_expansion_in_unroller) Optimization
Apply variable expansion when loops are unrolled
symbolic
Driver
-pie
+no-pie
Driver RejectNegative Negative(shared)
+Don't create a position independent executable
+
+pie
+Driver RejectNegative Negative(no-pie)
Create a position independent executable
z
projects / gcc.git / blobdiff