; Options for the language- and target-independent parts of the compiler.
-; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
; Free Software Foundation, Inc.
;
; This file is part of GCC.
Variable
int optimize_fast
+; True if this is the lto front end. This is used to disable gimple
+; generation and lowering passes that are normally run on the output
+; of a front end. These passes must be bypassed for lto since they
+; have already been done before the gimple was written.
+Variable
+bool in_lto_p = false
+
; 0 means straightforward implementation of complex divide acceptable.
; 1 means wide ranges of inputs must work for complex divide.
; 2 means C99-like requirements for complex multiply and divide.
Variable
enum stack_check_type flag_stack_check = NO_STACK_CHECK
+; True if stack usage information needs to be computed.
+Variable
+bool flag_stack_usage_info = false
+
; -dA causes debug commentary information to be produced in
; the generated assembly code (to make it more readable). This option
; is generally only of use to those who actually need to read the
Common Alias(pedantic-errors)
-pie
-Common Alias(pie)
+Driver Alias(pie)
-pipe
Driver Alias(pipe)
Driver Alias(save-temps)
-shared
-Common Alias(shared)
+Driver Alias(shared)
-specs
Driver Separate Alias(specs=)
Tbss
Driver Separate
+Tbss=
+Driver Joined
+
Tdata
Driver Separate
+Tdata=
+Driver Joined
+
Ttext
Driver Separate
+Ttext=
+Driver Joined
+
W
Common RejectNegative Warning Alias(Wextra)
This switch is deprecated; use -Wextra instead
Common RejectNegative Joined UInteger
-Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes
+Wfree-nonheap-object
+Common Var(warn_free_nonheap_object) Init(1) Warning
+Warn when attempting to free a non-heap object
+
Winline
Common Var(warn_inline) Warning
Warn when an inlined function cannot be inlined
+Winvalid-memory-model
+Common Var(warn_invalid_memory_model) Init(1) Warning
+Warn when an atomic memory model parameter is known to be outside the valid range.
+
Wlarger-than-
Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=)
Common Var(warn_missing_noreturn) Warning
Warn about functions which might be candidates for __attribute__((noreturn))
-Wmudflap
-Common Var(warn_mudflap) Init(1) Warning
-Warn about constructs not instrumented by -fmudflap
-
Woverflow
Common Var(warn_overflow) Init(1) Warning
Warn about overflow in arithmetic expressions
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
+
Wstrict-aliasing
Common Warning
Warn about code which might break strict aliasing rules
Common Var(warn_uninitialized) Init(-1) Warning
Warn about uninitialized automatic variables
+Wmaybe-uninitialized
+Common Var(warn_maybe_uninitialized) Warning
+Warn about maybe uninitialized automatic variables
+
Wunreachable-code
Common Ignore
Does nothing. Preserved for backward compatibility.
Common Var(warn_coverage_mismatch) Init(1) Warning
Warn in case profiles in -fprofile-use do not match
+Wvector-operation-performance
+Common Var(warn_vector_operation_performance) Warning
+Warn when a vector operation is compiled outside the SIMD
+
Xassembler
Driver Separate
; function parameters used in other parameters and the return type.
; First selectable in G++ 4.6.
;
+; 6: The version of the ABI that doesn't promote scoped enums to int and
+; changes the mangling of template argument packs, const/static_cast,
+; prefix ++ and --, and a class scope function used as a template
+; argument.
+; First selectable in G++ 4.7.
+;
; Additional positive integers will be assigned as new versions of
; the ABI become the default version of the ABI.
fabi-version=
Common Var(flag_diagnostics_show_option) Init(1)
Amend appropriate diagnostic messages with the command line option that controls them
+fdisable-
+Common Joined RejectNegative Var(common_deferred_options) Defer
+-fdisable-[tree|rtl|ipa]-<pass>=range1+range2 disables an optimization pass
+
+fenable-
+Common Joined RejectNegative Var(common_deferred_options) Defer
+-fenable-[tree|rtl|ipa]-<pass>=range1+range2 enables an optimization pass
+
fdump-
Common Joined RejectNegative Var(common_deferred_options) Defer
-fdump-<type> Dump various compiler internals to a file
Common Report Var(flag_dump_noaddr)
Suppress output of addresses in debugging dumps
+fdump-passes
+Common Var(flag_dump_passes) Init(0)
+Dump optimization passes
+
fdump-unnumbered
Common Report Var(flag_dump_unnumbered)
Suppress output of instruction numbers, line number notes and addresses in debugging dumps
ffast-math
Common
+ffat-lto-objects
+Common Var(flag_fat_lto_objects) Init(1)
+Output lto objects containing both the intermediate language and binary output.
+
ffinite-math-only
Common Report Var(flag_finite_math_only) Optimization SetByCombined
Assume no NaNs or infinities are generated
Common Report Var(flag_loop_block) Optimization
Enable Loop Blocking transformation
+fgnu-tm
+Common Report Var(flag_tm)
+Enable support for GNU transactional memory
+
floop-flatten
Common Report Var(flag_loop_flatten) Optimization
Enable Loop Flattening transformation
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
+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) Init(1) Optimization
-Integrate functions called once into their callers
+Common Report Var(flag_inline_functions_called_once) Optimization
+Integrate functions only required by their single caller
finline-limit-
Common RejectNegative Joined Alias(finline-limit=)
Common RejectNegative Joined UInteger
-finline-limit=<number> Limit the size of inlined functions to <number>
+finline-atomics
+Common Report Var(flag_inline_atomics) Init(1) Optimization
+Inline __atomic operations when a lock free instruction sequence is available.
+
finstrument-functions
Common Report Var(flag_instrument_function_entry_exit)
Instrument function entry and exit with profiling calls
Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY)
fira-region=
-Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_MIXED)
+Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT)
-fira-region=[one|all|mixed] Set regions for IRA
Enum
-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(flag_move_loop_invariants) Init(1) Optimization
Move loop invariant computations out of loops
-fmudflap
-Common RejectNegative Report Var(flag_mudflap)
-Add mudflap bounds-checking instrumentation for single-threaded program
-
-fmudflapth
-Common RejectNegative Report Var(flag_mudflap,2)
-Add mudflap bounds-checking instrumentation for multi-threaded program
-
-fmudflapir
-Common RejectNegative Report Var(flag_mudflap_ignore_reads)
-Ignore read operations when inserting mudflap instrumentation
-
fdce
Common Var(flag_dce) Init(1) Optimization
Use the RTL dead code elimination pass
Does nothing. Preserved for backward compatibility.
fzee
-Common Report Var(flag_zee) Init(0)
-Eliminate redundant zero extensions on targets that support implicit extensions.
+Common Ignore
+Does nothing. Preserved for backward compatibility.
+
+free
+Common Report Var(flag_ree) Init(0)
+Turn on Redundant Extensions Elimination pass.
fshow-column
Common Report Var(flag_show_column) Init(1)
Show column numbers in diagnostics, when available. Default on
+fshrink-wrap
+Common Report Var(flag_shrink_wrap) Optimization
+Emit function prologues only before parts of the function that need it,
+rather than at the top of the function.
+
fsignaling-nans
Common Report Var(flag_signaling_nans) Optimization SetByCombined
Disable optimizations observable by IEEE signaling NaNs
Common Report Var(flag_tree_dom) Optimization
Enable dominator optimizations
+ftree-tail-merge
+Common Report Var(flag_tree_tail_merge) Optimization
+Enable tail merging on trees
+
ftree-dse
Common Report Var(flag_tree_dse) Optimization
Enable dead store elimination
Common Report Var(flag_tree_fre) Optimization
Enable Full Redundancy Elimination (FRE) on trees
+foptimize-strlen
+Common Report Var(flag_optimize_strlen) Optimization
+Enable string length optimizations on trees
+
ftree-loop-distribution
Common Report Var(flag_tree_loop_distribution) Optimization
Enable loop distribution on trees
Common JoinedOrMissing
Generate debug information in default extended format
+gno-record-gcc-switches
+Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(0)
+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.
+
gstabs
Common JoinedOrMissing Negative(gstabs+)
Generate debug information in STABS format
Driver Joined Separate
shared
-Common RejectNegative Negative(pie)
+Driver RejectNegative Negative(pie)
Create a shared library
shared-libgcc
Driver
pie
-Common RejectNegative Negative(shared)
+Driver RejectNegative Negative(shared)
Create a position independent executable
z
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