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-Wold-style-cast -Wold-style-declaration -Wold-style-definition -Wout-of-date -Wover-ann -Woverflow -Woverlength-strings -Woverloaded-virtual -Woverride-init -Wpacked -Wpadded -Wparam-assign -Wparentheses -Wpkg-default-method -Wpmf-conversions -Wpointer-arith -Wpointer-sign -Wpointer-to-int-cast -Wpoison-system-directories -Wpragmas Warn about misuses of pragmas -Wprotocol -Wraw -Wredundant-decls -Wredundant-modifiers -Wreorder -Wreturn-type -Wselector -Wsequence-point -Wserial -Wshadow -Wsign-compare -Wsign-conversion -Wsign-promo -Wspecial-param-hiding -Wstack-protector -Wstatic-access -Wstatic-receiver -Wstrict-aliasing -Wstrict-aliasing= -Wstrict-null-sentinel -Wstrict-overflow -Wstrict-overflow= -Wstrict-prototypes -Wstrict-selector-match -Wsuppress -Wsurprising -Wswitch -Wswitch-default -Wswitch-enum -Wsynth -Wsynthetic-access -Wsystem-headers -Wtabs -Wtasks -Wtraditional -Wtraditional-conversion -Wtrigraphs -Wtype-hiding -Wtype-limits -Wuncheck -Wundeclared-selector -Wundef -Wunderflow -Wuninitialized -Wunknown-pragmas -Wunnecessary-else -Wunqualified-field -Wunreachable-code -Wunsafe-loop-optimizations -Wunused -Wunused-argument -Wunused-function -Wunused-import -Wunused-label -Wunused-local -Wunused-macros -Wunused-parameter -Wunused-private -Wunused-thrown -Wunused-value -Wunused-variable -Wuseless-type-check -Wvarargs-cast -Wvariadic-macros -Wvla -Wvolatile-register-var -Wwarning-token -Wwrite-strings -aux-info -aux-info= -auxbase -auxbase-strip -fCLASSPATH= -fPIC -fPIE -fRTS= -fabi-version= -faccess-control -falign-arrays -falign-functions Align the start of functions -falign-functions= -falign-jumps -falign-jumps= -falign-labels Align all labels -falign-labels= -falign-loops Align the start of loops -falign-loops= -fall-intrinsics -fall-virtual -fallow-leading-underscore -falt-external-templates -fargument-alias -fargument-noalias -fargument-noalias-anything -fargument-noalias-global -fasm Recognize the "asm" keyword -fassert -fassociative-math -fassume-compiled -fassume-compiled= -fasynchronous-unwind-tables -fauto-inc-dec -fautomatic -faux-classpath -fbackslash -fbacktrace -fblas-matmul-limit= -fbootstrap-classes -fbounds-check -fbranch-count-reg -fbranch-probabilities -fbranch-target-load-optimize -fbtr-bb-exclusive -fbuiltin Recognize built-in functions -fbuiltin- -fcall-saved- -fcall-used- -fcaller-saves -fcheck-data-deps -fcheck-new Check the return value of new -fcheck-references -fcommon -fcond-mismatch -fconserve-space -fconstant-string-class= -fconvert=big-endian -fconvert=little-endian -fconvert=native -fconvert=swap -fcprop-registers -fcray-pointer -fcrossjumping -fcse-follow-jumps -fcse-skip-blocks -fcx-limited-range -fd-lines-as-code -fd-lines-as-comments -fdata-sections -fdbg-cnt-list -fdbg-cnt= -fdce -fdebug-prefix-map= -fdefault-double-8 -fdefault-inline -fdefault-integer-8 -fdefault-real-8 -fdefer-pop -fdelayed-branch -fdelete-null-pointer-checks -fdiagnostics-show-location= -fdiagnostics-show-option -fdirectives-only Preprocess directives only. -fdisable-assertions -fdisable-assertions= -fdollar-ok -fdollars-in-identifiers -fdse -fdump- -fdump-core -fdump-noaddr -fdump-parse-tree -fdump-unnumbered -fearly-inlining Perform early inlining -felide-constructors -feliminate-dwarf2-dups -femit-class-debug-always Output a class file -femit-class-files Alias for -femit-class-file -femit-struct-debug-baseonly -femit-struct-debug-detailed= -femit-struct-debug-reduced -fenable-assertions -fenable-assertions= -fenforce-eh-specs -fenum-int-equiv -fexceptions Enable exception handling -fexec-charset= -fexpensive-optimizations -fextended-identifiers -fexternal-blas -fexternal-templates -ff2c Use f2c calling convention -ffast-math -ffilelist-file -ffinite-math-only -ffixed- -ffixed-form -ffixed-line-length- -ffixed-line-length-none -ffloat-store -ffor-scope -fforce-addr -fforce-classes-archive-check -fforward-propagate -ffpe-trap= -ffree-form -ffree-line-length- -ffree-line-length-none -ffreestanding -ffriend-injection -ffunction-cse -ffunction-sections -fgcse -fgcse-after-reload -fgcse-las -fgcse-lm -fgcse-sm -fgnu-keywords -fgnu-runtime -fgnu89-inline -fguess-branch-probability -fguiding-decls -fhandle-exceptions -fhash-synchronization -fhonor-std -fhosted -fhuge-objects -fident Process #ident directives -fif-conversion -fif-conversion2 -fimplement-inlines -fimplicit-inline-templates -fimplicit-none -fimplicit-templates -findirect-classes -findirect-dispatch -finhibit-size-directive -finit-character= -finit-integer= -finit-local-zero -finit-logical= -finit-real= -finline -finline-functions -finline-limit- -finline-limit= -finline-small-functions -finput-charset= -finstrument-functions -fintrinsic-modules-path -fipa-cp -fipa-matrix-reorg -fipa-pta -fipa-pure-const -fipa-reference -fipa-struct-reorg -fipa-type-escape -fivopts -fjni -fjump-tables -fkeep-inline-functions -fkeep-static-consts -flabels-ok -flax-vector-conversions -fleading-underscore -flexer-trace Trace lexical analysis -floop-optimize -fmath-errno -fmax-errors= -fmax-identifier-length= -fmax-stack-var-size= -fmax-subrecord-length= -fmem-report -fmerge-all-constants -fmerge-constants -fmerge-debug-strings -fmessage-length= -fmodule-private -fmodulo-sched -fmodulo-sched-allow-regmoves -fmove-loop-invariants -fms-extensions -fmudflap -fmudflapir -fmudflapth -fname-mangling-version- -fnew-abi -fnext-runtime -fnil-receivers -fnon-call-exceptions -fnonansi-builtins -fnonnull-objects -fobjc-call-cxx-cdtors -fobjc-direct-dispatch -fobjc-exceptions -fobjc-gc -fobjc-sjlj-exceptions -fomit-frame-pointer -fopenmp -fopenmp-ssa -foperator-names -foptimize-register-move -foptimize-sibling-calls -foptional-diags Enable optional diagnostics -fpack-derived -fpack-struct -fpack-struct= -fparser-trace Trace the parsing process -fpcc-struct-return -fpch-deps -fpch-preprocess -fpeel-loops Perform loop peeling -fpeephole -fpeephole2 -fpermissive -fpic -fpie -fpost-ipa-mem-report -fpre-ipa-mem-report -fpredictive-commoning -fprefetch-loop-arrays -fpreprocessed -fprofile -fprofile-arcs -fprofile-generate -fprofile-use -fprofile-values -fpromote-loop-indices -frandom-seed -frandom-seed= -frange-check -freciprocal-math -frecord-gcc-switches -frecord-marker=4 -frecord-marker=8 -frecursive -freduced-reflection -freg-struct-return -fregmove -fremove-local-statics -frename-registers -freorder-blocks -freorder-functions -frepack-arrays -freplace-objc-classes -frepo -frerun-cse-after-loop -frerun-loop-opt -frounding-math -frtl-abstract-sequences -frtti -fsaw-java-file -fsched-interblock -fsched-spec -fsched-spec-load -fsched-spec-load-dangerous -fsched-stalled-insns -fsched-stalled-insns-dep -fsched-stalled-insns-dep= -fsched-stalled-insns= -fsched-verbose= -fsched2-use-superblocks -fsched2-use-traces -fschedule-insns -fschedule-insns2 -fsecond-underscore -fsection-anchors -fsee -fshort-double -fshort-enums -fshort-wchar -fshow-column -fsign-zero -fsignaling-nans -fsigned-bitfields -fsigned-char Make "char" signed by default -fsigned-zeros -fsingle-precision-constant -fsource-filename= -fsource= -fsplit-ivs-in-unroller -fsplit-wide-types -fsquangle -fstack-check -fstack-limit -fstack-limit-register= -fstack-limit-symbol= -fstack-protector -fstack-protector-all -fstats -fstore-check -fstrength-reduce -fstrict-aliasing -fstrict-overflow -fstrict-prototype -fsyntax-only -ftabstop= -ftarget= Set the target VM version -ftemplate-depth- -ftest-coverage -fthis-is-variable -fthread-jumps -fthreadsafe-statics -ftime-report -ftls-model= -ftoplevel-reorder -ftracer -ftrapping-math -ftrapv -ftree-ccp -ftree-ch -ftree-copy-prop -ftree-copyrename -ftree-cselim -ftree-dce -ftree-dominator-opts -ftree-dse Enable dead store elimination -ftree-fre -ftree-loop-im -ftree-loop-ivcanon -ftree-loop-linear -ftree-loop-optimize -ftree-lrs -ftree-parallelize-loops= -ftree-pre -ftree-reassoc -ftree-salias -ftree-scev-cprop -ftree-sink -ftree-sra -ftree-store-ccp -ftree-store-copy-prop -ftree-ter -ftree-vect-loop-version -ftree-vectorize -ftree-vectorizer-verbose= -ftree-vrp -funderscoring -funit-at-a-time -funroll-all-loops -funroll-loops -funsafe-loop-optimizations -funsafe-math-optimizations -funsigned-bitfields -funsigned-char -funswitch-loops Perform loop unswitching -funwind-tables -fuse-boehm-gc -fuse-cxa-atexit -fuse-cxa-get-exception-ptr -fuse-divide-subroutine -fvar-tracking Perform variable tracking -fvar-tracking-uninit -fvect-cost-model -fverbose-asm -fvisibility-inlines-hidden -fvisibility-ms-compat -fvisibility= -fvpt -fvtable-gc -fvtable-thunks -fweak -fweb -fwhole-program -fwide-exec-charset= -fworking-directory -fwrapv -fxref -fzero-initialized-in-bss -fzero-link -gant -gcoff -gdwarf-2 -gen-decls -ggdb -gnat -gnatO -gstabs -gstabs+ -gvms -gxcoff -gxcoff+ -iquote -lang-asm -lang-fortran -lang-objc -m1 Generate SH1 code -m2 Generate SH2 code -m2a Generate SH2a code -m2a-nofpu Generate SH2a FPU-less code -m2a-single -m2a-single-only -m2e Generate SH2e code -m3 Generate SH3 code -m3e Generate SH3e code -m4 Generate SH4 code -m4-100 Generate SH4-100 code -m4-100-nofpu -m4-100-single -m4-100-single-only -m4-200 Generate SH4-200 code -m4-200-nofpu -m4-200-single -m4-200-single-only -m4-300 Generate SH4-300 code -m4-300-nofpu -m4-300-single -m4-300-single-only -m4-340 -m4-400 -m4-500 -m4-nofpu Generate SH4 FPU-less code -m4-single -m4-single-only -m4a Generate SH4a code -m4a-nofpu Generate SH4a FPU-less code -m4a-single -m4a-single-only -m4al Generate SH4al-dsp code -m5-32media Generate 32-bit SHmedia code -m5-32media-nofpu -m5-64media Generate 64-bit SHmedia code -m5-64media-nofpu -m5-compact Generate SHcompact code -m5-compact-nofpu -madjust-unroll -mb -mbigtable -mbranch-cost= -mcbranchdi Enable cbranchdi4 pattern -mcmpeqdi -mcut2-workaround Enable SH5 cut2 workaround -mdalign -mdiv= -mdivsi3_libfunc= -mexpand-cbranchdi -mfmovd -mfused-madd -mgettrcost= Cost to assume for gettr insn -mglibc -mhitachi -mieee -mindexed-addressing -minline-ic_invalidate -minvalid-symbols -misize -ml -mnomacsave -mpadstruct -mprefergot -mpretend-cmove -mpt-fixed -mrelax -mrenesas -mspace Deprecated. Use -Os instead -muclibc -multcost= -musermode -nostdinc++ Enable function profiling -print-objc-runtime-info -print-pch-checksum -remap Create a shared library -static-libgfortran -std=c++0x -std=c++98 -std=c89 -std=c99 -std=c9x -std=f2003 -std=f95 -std=gnu -std=gnu++0x -std=gnu++98 -std=gnu89 -std=gnu99 -std=gnu9x -std=iso9899:1990 -std=iso9899:199409 -std=iso9899:1999 -std=iso9899:199x -std=legacy -undef Suppress warnings -y O & \ PR UR \R eR @ ~R @ R f 4 @ R @ R @ * f R f f _ D f f @ R f R @& G d f R v f R @ R v ( f v f R @ R v R D f R v M l @ R @ f R f ( @ S D $ S l ! f !S " H 4S # $ ?S % QS & _S ' kS @ ( H zS ) S l * ` S + H | S , " S - S $ . " l S l / D S 0 H S 1 f l T 2 T $ 3 f T P 4 7T | 5 f ZT 6 f CT NT 7 f dT 8 wT 9 T $ : n 8 T D H T < D T = " d T > T ? T T @ @ H U | A H h &U B 4U C f BU D D t KU E YU F f fU D G f uU H U I U U J f @ t $ " U L @ U M H U < N U O U l P @ U Q V R V S &V T f 4V U @V V f IV W f ` _V < X f H sV Y f V Z f V [ f V $ \ " V ] f V ^ V D _ V ` f p a " V b " V c W d f W e -W @ f f 9W | g H x BW h " XW i jW j W k D W ( l f W m W \ H* W o W p W q H W r g W L s f W t X | u f X v f 7X w f TX $ x g T oX l y f X z H @ X { " X T | # X } f X ~ " X X X D Y < D &Y ` " x 0Y DY f RY YY D jY L " Y x # ( Y Y Y H Y g Y \ D d Y " Y H Z H Z Z @ f 0 &Z ;Z h D MZ f ]Z " lZ " Z L @ Z Z f Z ` Z Z f Z Z ( D [ P f [ ` "[ f 3[ <[ H E[ H f T[ p f f[ D s[ [ H [ [ [ , H [ , H" [ d D [ H \ H" \ # 3\ ` K\ V\ L c\ p H 0 l\ H }\ H | \ , D \ \ ` f H \ \ \ " \ " \ ` f \ ] f ] ] ` 5] L f =] I] H d Y] f k] ~] ] H ] 8 H l ] H ] ] | H x ] ] H l ^ ^ f ,^ H ?^ P^ `^ H o^ 0 H ^ ^ ^ P g ^ f ^ H ^ ^ g f ^ @ ^ @ _ @ _ @ f @ X @ "_ /_ @ 5_ @ ;_ B_ @" Q_ L D b_ | \ q_ _ @ h _ @* _ P _ @* _ _ P x _ @* ` ` P 8 '` @* 6` G` D U` @ p` < D ` h P t ` P t ` P t ` P t ` ` f a 8 a ` @ !a 3a Fa P ca @ ra ~a L a h a a * Y < a h a @ a P a P b @ P P &b P 9b Cb f `b f kb H @ yb @ b P b @ b b D b D 9 l b P b f b D c ( ` 'c l P e L @ e ? @ e ? A @ $ e ? B e ? C @ $ e e D P e E D f d F @ ( G @ T H @ !f I @ lf ;f J d Of bf K d ~f 0 L f f x M f f N f f O f P f \ R D g S D "g /g T P Ig f Yg V P 5 sg P X f g Y g Z D g g [ g \ @ g ] p g $ ^ P g P @ h _ h _ * *h a Ch @ c P Qh d D ]h e @ jh f h , g P h h X h h * h j h 8 l f h t m D i n @ i o @ %i p P ( ,i 8 q P P @i r P Ki s P Ui t P _i d u D ni v ` |i w " i x P i y D i z D i { | @ } @ i ~ D i d " i D j j @ 'j P 7j P X Hj 4! D \j d! D xj ! j ! D j $" j L" j x" @ j " * j " j $# k T# !k # .k # @ $ 7k P \ # $ P ( Jk @* Zk P$ @* jk $ P @ k $ f k 8% @ p% % ( @ & 0& , @ k & k & P k & P p k ,' P k X' P k |' P l ' @ l ' P 0l ( P , 9l 4( ?l h( P 0 Ml ( @ ` el ( @ 4 zl D l ) f l ) @ 8 l l l @ l ) @ < l ) * m * * m H* * 3m * * Km * @ Xm + P @ nm D+ P @ m + @ D m + @* m 4, m p, P L m , @ H m , P H m (- f n X- @ p n - @ #n - @ p /n D Hn D Rn (. ` an d. ` qn . P 8 n D n D n . @ , n / ` n L/ ` L n / ` 0 n / ` L o 0 P "o 00 n +o X0 @ , 8o 0 D Io 0 P bo 0 P 1 01 % {o o D r o h1 o 1 P o 1 P* o o o 2 @ D p f p L2 f -p :p P Op 2 P p Zp 2 P fp 2 D sp 3 @ yp D3 @ p 3 @ p 3 @ p 3 P p 3 P X p <4 n p d4 @ p 4 @ q 4 @ q 5 @ !q `5 @ 2q 5 @ Iq @ Wq 5 @ fq 6 tq 46 @ q x6 @ q 6 q 6 q 7 q \7 q 7 P D q 7 P q 7 r 88 P P )r h8 P 8 8 P :r 8 P t Nr $9 ^r d9 ` ur 9 D |r 9 P T r @ 0: T: " P r : P | r : P t r $; D r H r T; P X r |; P \ s ; P s ; P < 2s ; P Hs < P ` bs l< @* }s < @* s 4= @ s x= P H s = P s = P s > P ` s D> t > P t > @ !t > f 0t $? n >t d? f Lt ? f @ Zt ? ft @ P h wt D@ f t t f t @ P d t @ P t B t A t 8A ! P h u xA " P )u # D 4u A $ @ Bu % @ Pu A @ hu B @ ~u dB ( @ L u B @ L u B * D u B + l u , @ u 4C - P u XC . @ u / D v |C 0 @ v C f * 2 @ v (v 3 Bv C D * Tv ,D 5 @ dv 6 D wv PD 7 P v xD 8 D v D 9 @ v D @ v |E ; P p v E < @ 4 v E = P t v F > P @ v XF ? P v F @ P H v F A P D w F B P 4 "w F C P x 0w 0G D P ;w hG E P X Qw \w F P zw G G P 4 w G H P | w G I P w H J P $ w Display descriptions of a specific class of options. is one or more of optimizers, target, warnings, undocumented, params --param = Set parameter to value. See below for a complete list of parameters -A= Assert the to . Putting '-' before disables the to Do not discard comments in macro expansions -D[=] Define a with as its value. If just is given, is taken to be 1 -F Add to the end of the main framework include path -G Put global and static data smaller than bytes into a special section (on some targets) Print the name of header files as they are used -J Put MODULE files in 'directory' Generate make dependencies and compile Treat missing header files as generated files Like -MD but ignore system header files -MQ Add a MAKE-quoted target -O Set optimization level to Optimize for space rather than speed Do not generate #line directives This switch is deprecated; use -Wextra instead Warn about things that will change when compiling with an ABI-compliant compiler Warn about suspicious uses of memory addresses Warn about returning structures, unions or arrays Warn about possible aliasing of dummy arguments Warn about missing ampersand in continued character constants Warn if an array is accessed out of bounds Warn whenever an Objective-C assignment is being intercepted by the garbage collector Warn about inappropriate attribute usage Warn about casting functions to incompatible types Warn about C constructs that are not in the common subset of C and C++ Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 200x Warn about pointer casts which increase alignment Warn about casts which discard qualifiers Warn about subscripts whose type is "char" Warn about truncated character expressions Warn about variables that might be changed by "longjmp" or "vfork" Warn about possibly nested block comments, and C++ comments spanning more than one physical line Warn about implicit conversion Warn instead of error in case profiles in -fprofile-use do not match Warn when all constructors and destructors are private Warn when a declaration is found after a statement Warn if a deprecated compiler feature, class, method, or field is used Warn about uses of __attribute__((deprecated)) declarations Warn when an optimization pass is disabled Warn about compile-time integer division by zero Warn about violations of Effective C++ style rules Warn about an empty body in an if or else statement Warn about stray tokens after #elif and #endif -Werror-implicit-function-declaration This switch is deprecated; use -Werror=implicit-function-declaration instead Treat specified warning as error Print extra (possibly unwanted) warnings Warn if deprecated empty statements are found Exit on the first error occurred Warn if testing floating point numbers for equality Warn about printf/scanf/strftime/strfmon format string anomalies Warn about format strings that contain NUL bytes Warn if passing too many arguments to a function for its format string Warn about format strings that are not literals Warn about possible security problems with format functions Warn about strftime formats yielding 2-digit years Warn about zero-length formats Warn whenever type qualifiers are ignored. -Wimplicit-function-declaration Warn about implicit function declarations Warn when a declaration does not specify a type Warn about calls with implicit interface Deprecated. This switch has no effect Warn about variables which are initialized to themselves Warn when an inlined function cannot be inlined Warn when there is a cast to a pointer from an integer of a different size Warn about invalid uses of the "offsetof" macro Warn about PCH files that are found but not used -Wlarger-than- Warn if an object is larger than bytes Warn about truncated source lines Warn when a logical operator is suspicously always evaluating to true or false Do not warn about using "long long" when -pedantic Warn about suspicious declarations of "main" Warn about possibly missing braces around initializers Warn about global functions without previous declarations Warn about missing fields in struct initializers Warn about functions which might be candidates for format attributes Warn about user-specified include directories that do not exist Warn about functions which might be candidates for __attribute__((noreturn)) Warn about function parameters declared without a type specifier in K&R-style functions Warn about global functions without prototypes Warn about use of multi-character character constants Warn about "extern" declarations not at file scope Warn when non-templatized friend functions are declared within a template Warn about non-virtual destructors Warn about NULL being passed to argument slots marked as requiring non-NULL Warn about usage of non-standard intrinsics -Wnormalized= Warn about non-normalised Unicode strings Warn if a C-style cast is used in a program Warn for obsolescent usage in a declaration Warn if an old-style parameter definition is used Warn if .class files are out of date Warn about overflow in arithmetic expressions Warn if a string is longer than the maximum portable length specified by the standard Warn about overloaded virtual function names Warn about overriding initializers without side effects Warn when the packed attribute has no effect on struct layout Warn when padding is required to align structure members Warn about possibly missing parentheses Warn when converting the type of pointers to member functions Warn about function pointer arithmetic Warn when a pointer differs in signedness in an assignment Warn when a pointer is cast to an integer of a different size Warn for -I and -L options using system directories if cross compiling Warn if inherited methods are unimplemented Warn about multiple declarations of the same object Warn if modifiers are specified when not necessary Warn when the compiler reorders code Warn whenever a function's return type defaults to "int" (C), or about inconsistent return types (C++) Warn if a selector has multiple methods Warn about possible violations of sequence point rules Warn when one local variable shadows another Warn about signed-unsigned comparisons Warn for implicit type conversions between signed and unsigned integers Warn when overload promotes from unsigned to signed Warn when not issuing stack smashing protection for some reason Warn about code which might break strict aliasing rules Warn about uncasted NULL used as sentinel Warn about optimizations that assume that signed overflow is undefined Warn about unprototyped function declarations Warn if type signatures of candidate methods do not match exactly Warn about "suspicious" constructs Warn about enumerated switches, with no default, missing a case Warn about enumerated switches missing a "default:" statement Warn about all enumerated switches missing a specific case Warn when synthesis behavior differs from Cfront Do not suppress warnings from system headers Permit nonconforming uses of the tab character Warn about features not present in traditional C Warn of prototypes causing type conversions different from what would happen in the absence of prototype Warn if trigraphs are encountered that might affect the meaning of the program Warn if a comparison is always true or always false due to the limited range of the data type Warn about @selector()s without previously declared methods Warn if an undefined macro is used in an #if directive Warn about underflow of numerical constant expressions Warn about uninitialized automatic variables Warn about unrecognized pragmas Warn about code that will never be executed Warn if the loop cannot be optimized due to nontrivial assumptions. Warn when a function is unused Warn about macros defined in the main file that are not used Warn when a function parameter is unused Warn when an expression value is unused Warn when a variable is unused Do not warn about using variadic macros when -pedantic Warn if a variable length array is used Warn when a register variable is declared volatile In C++, nonzero means warn about deprecated conversion from string literals to `char *'. In C, similar warning, except that the conversion is of course not deprecated by the ISO C standard. A synonym for -std=c89 (for C) or -std=c++98 (for C++) -aux-info Emit declaration information into -d Enable dumps from specific passes of the compiler -dumpbase Set the file basename to be used for dumps --CLASSPATH Deprecated; use --classpath instead Generate position-independent code if possible (large mode) Generate position-independent code for executables if possible (large mode) Enforce class member access control semantics Set the minimum alignment for array variables to be the largest power Align labels which are only reached by jumping All intrinsics procedures are available regardless of selected standard Change when template instances are emitted Specify that arguments may alias each other and globals Assume arguments may alias globals but not each other Assume arguments alias no other storage Assume arguments alias neither each other nor globals Permit the use of the assert keyword Allow optimization for floating-point arithmetic which may change the Generate unwind tables that are exact at each instruction boundary Generate auto-inc/dec instructions Do not treat local variables and COMMON blocks as if they were named in SAVE statements Specify that backslash in string introduces an escape character Produce a backtrace when a runtime error is encountered -fblas-matmul-limit= Size of the smallest matrix for which matmul will use BLAS --bootclasspath= Replace system path Generated should be loaded by bootstrap loader Generate code to check bounds before indexing arrays Replace add, compare, branch with branch on count register Use profiling information for branch probabilities Perform branch target load optimization before prologue / epilogue threading -fbranch-target-load-optimize2 Perform branch target load optimization after prologue / epilogue threading Restrict target load migration not to re-use registers in any basic block -fcall-saved- Mark as being preserved across functions -fcall-used- Mark as being corrupted by function calls Save registers around function calls Compare the results of several data dependence analyzers. Generate checks for references to NULL --classpath= Set class path Do not put uninitialized globals in the common section Allow the arguments of the '?' operator to have different types Reduce the size of object files -fconst-string-class= Use class for constant strings Use big-endian format for unformatted files Use little-endian format for unformatted files Use native format for unformatted files Swap endianness for unformatted files Perform a register copy-propagation optimization pass Use the Cray Pointer extension Perform cross-jumping optimization When running CSE, follow jumps to their targets When running CSE, follow conditional jumps Omit range reduction step when performing complex division Ignore 'D' in column one in fixed form Treat lines with 'D' in column one as comments Place data items into their own section List all available debugging counters with their limits and counts. -fdbg-cnt=:[,:,...] Set the debug counter limit. Use the RTL dead code elimination pass Map one directory name to another in debug information Set the default double precision kind to an 8 byte wide type Inline member functions by default Set the default integer kind to an 8 byte wide type Set the default real kind to an 8 byte wide type Defer popping functions args from stack until later Attempt to fill delay slots of branch instructions Delete useless null pointer checks -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics Amend appropriate diagnostic messages with the command line option that controls them Allow dollar signs in entity names Permit '$' as an identifier character Use the RTL dead store elimination pass -fdump- Dump various compiler internals to a file Dump a core file when a runtime error occurs Suppress output of addresses in debugging dumps Display the code tree after parsing Suppress output of instruction numbers, line number notes and addresses in debugging dumps Perform DWARF2 duplicate elimination -feliminate-unused-debug-symbols Perform unused type elimination in debug info -feliminate-unused-debug-types Do not suppress C++ class debug information. -femit-struct-debug-baseonly Aggressive reduced debug info for structs -femit-struct-debug-detailed= Detailed reduced debug info for structs -femit-struct-debug-reduced Conservative reduced debug info for structs --encoding= Choose input encoding (defaults from your locale) Generate code to check exception specifications -fexec-charset= Convert all strings and character constants to character set Perform a number of minor, expensive optimizations --extdirs= Set the extension directory path Permit universal character names (\u and \U) in identifiers Specify that an external BLAS library should be used for matmul calls on large-size arrays Input file is a file with a list of filenames to compile Assume no NaNs or infinities are generated -ffixed- Mark as being unavailable to the compiler Assume that the source file is fixed form -ffixed-line-length- Use n as character line width in fixed mode Allow arbitrary character line width in fixed mode Don't allocate floats and doubles in extended-precision registers Scope of for-init-statement variables is local to the loop Does nothing. Preserved for backward compatibility. Always check for non gcj generated classes archives Perform a forward propagation pass on RTL -ffpe-trap=[..] Stop on following floating point exceptions Assume that the source file is free form -ffree-line-length- Use n as character line width in free mode Allow arbitrary character line width in free mode Do not assume that standard C libraries and "main" exist Inject friend functions into enclosing namespace Allow function addresses to be held in registers Place each function into its own section Perform global common subexpression elimination Perform global common subexpression elimination after register allocation Perform redundant load after store elimination in global common subexpression Perform enhanced load motion during global common subexpression elimination Perform store motion after global common subexpression elimination Recognize GNU-defined keywords Generate code for GNU runtime environment Use traditional GNU semantics for inline functions Enable guessing of branch probabilities Assume the runtime uses a hash table to map an object to its synchronization structure Assume normal C execution environment Enable support for huge objects Perform conversion of conditional jumps to branchless equivalents Perform conversion of conditional jumps to conditional execution Export functions even if they can be inlined Emit implicit instantiations of inline templates Specify that no implicit typing is allowed, unless overridden by explicit IMPLICIT statements Emit implicit instantiations of templates Generate instances of Class at runtime Use offset tables for virtual method calls Do not generate .size directives -finit-character= Initialize local character variables to ASCII value n -finit-integer= Initialize local integer variables to n Initialize local variables to zero (from g77) -finit-logical= Initialize local logical variables -finit-real= Initialize local real variables Pay attention to the "inline" keyword -finline-functions-called-once Integrate functions called once into their callers -finline-limit= Limit the size of inlined functions to Integrate simple functions into their callers when code size is known to not growth -finput-charset= Specify the default character set for source files Instrument function entry and exit with profiling calls -finstrument-functions-exclude-file-list= -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files -finstrument-functions-exclude-function-list= -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions Specify where to find the compiled intrinsic modules Perform Interprocedural constant propagation Perform matrix layout flattening and transposing based Perform interprocedural points-to analysis Discover pure and const functions Discover readonly and non addressable static variables Perform structure layout optimizations based Type based escape and alias analysis Optimize induction variables on trees Assume native functions are implemented using JNI Use jump tables for sufficiently large switch statements Generate code for functions even if they are fully inlined Emit static const variables even if they are not used Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types. Give external symbols a leading underscore Set errno after built-in math functions -fmax-errors= Maximum number of errors to report -fmax-identifier-length= Maximum identifier length -fmax-stack-var-size= Size in bytes of the largest array that will be put on the stack -fmax-subrecord-length= Maximum length for subrecords Report on permanent memory allocation Attempt to merge identical constants and constant variables Attempt to merge identical constants across compilation units Attempt to merge identical debug strings across compilation units -fmessage-length= Limit diagnostics to characters per line. 0 suppresses line-wrapping Set default accessibility of module entities to PRIVATE. Perform SMS based modulo scheduling before the first scheduling pass Perform SMS based modulo scheduling with register moves allowed Move loop invariant computations out of loops Don't warn about uses of Microsoft extensions Add mudflap bounds-checking instrumentation for single-threaded program Ignore read operations when inserting mudflap instrumentation Add mudflap bounds-checking instrumentation for multi-threaded program Generate code for NeXT (Apple Mac OS X) runtime environment Assume that receivers of Objective-C messages may be nil Support synchronous non-call exceptions Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed Allow fast jumps to the message dispatcher Enable Objective-C exception and synchronization syntax Enable garbage collection (GC) in Objective-C/Objective-C++ programs Enable Objective-C setjmp exception handling runtime When possible do not generate stack frames Enable OpenMP (also sets frecursive) Expand OpenMP operations on SSA form Recognize C++ kewords like "compl" and "xor" Do the full register move optimization pass Optimize sibling and tail recursive calls -foptimize-static-class-initialization Enable optimization of static class initialization code Try to lay out derived types as compactly as possible Pack structure members together without holes -fpack-struct= Set initial maximum structure member alignment Return small aggregates in memory, not registers Look for and use PCH files even when preprocessing Enable machine specific peephole optimizations Enable an RTL peephole pass before sched2 Downgrade conformance errors to warnings Generate position-independent code if possible (small mode) Generate position-independent code for executables if possible (small mode) Report on memory allocation before interprocedural optimization Run predictive commoning optimization. Generate prefetch instructions, if available, for arrays in loops Treat the input file as preprocessed Enable basic program profiling code Insert arc-based program profiling code Enable common options for generating profile info for profile feedback directed optimizations Enable common options for performing profile feedback directed optimizations Insert code to profile values of expressions Promote loop indices to word-sized indices when safe -frandom-seed= Make compile reproducible using Enable range checking during compilation Same as -fassociative-math for expressions which include division. Record gcc command line switches in the object file. Use a 4-byte record marker for unformatted files Use an 8-byte record marker for unformatted files Allocate local variables on the stack to allow indirect recursion Reduce the amount of reflection meta-data generated Return small aggregates in registers Enables a register move optimization Convert function-local static variables to automatic variables when it is safe to do so Perform a register renaming optimization pass Reorder basic blocks to improve code placement -freorder-blocks-and-partition Reorder basic blocks and partition into hot and cold sections Reorder functions to improve code placement Copy array sections into a contiguous block on procedure entry Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime Enable automatic template instantiation Add a common subexpression elimination pass after loop optimizations -freschedule-modulo-scheduled-loops Enable/Disable the traditional scheduling in loops that already passed modulo scheduling Disable optimizations that assume default FP rounding behavior Perform sequence abstraction optimization on RTL Generate run time type descriptor information Enable scheduling across basic blocks Allow speculative motion of non-loads Allow speculative motion of some loads Allow speculative motion of more loads Allow premature scheduling of queued insns Set dependence distance checking in premature scheduling of queued insns -fsched-stalled-insns-dep= Set dependence distance checking in premature scheduling of queued insns -fsched-stalled-insns= Set number of queued insns that can be prematurely scheduled -fsched-verbose= Set the verbosity level of the scheduler If scheduling post reload, do superblock scheduling If scheduling post reload, do trace scheduling Reschedule instructions before register allocation Reschedule instructions after register allocation Append a second underscore if the name already contains an underscore Access data in the same section from shared anchor points Eliminate redundant sign extensions using LCM. Use the same size for double as for float Use the narrowest integer type possible for enumeration types Force the underlying type for "wchar_t" to be "unsigned short" Show column numbers in diagnostics, when available. Default off Apply negative sign to zero values Disable optimizations observable by IEEE signaling NaNs When "signed" or "unsigned" is not given make the bitfield signed Disable floating point optimizations that ignore the IEEE signedness of zero Convert floating point constants to single precision constants Set the source language version Split lifetimes of induction variables when loops are unrolled Split wide types into independent registers Insert stack checking code into the program -fstack-limit-register= Trap if the stack goes past -fstack-limit-symbol= Trap if the stack goes past symbol Use propolice as a stack protection method Use a stack protection method for every function Display statistics accumulated during compilation Enable assignability checks for stores into object arrays Assume strict aliasing rules apply Treat signed overflow as undefined Check for syntax errors, then stop -ftabstop= Distance between tab stops for column reporting -ftemplate-depth- Specify maximum template instantiation depth Create data files needed by "gcov" Perform jump threading optimizations -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics Report the time taken by each compiler pass -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model Reorder top level functions, variables, and asms Perform superblock formation via tail duplication Assume floating-point operations can trap Trap for signed overflow in addition, subtraction and multiplication Enable SSA-CCP optimization on trees Enable loop header copying on trees Enable copy propagation on trees Replace SSA temporaries with better names in copies Transform condition stores into unconditional ones Enable SSA dead code elimination optimization on trees Enable dominator optimizations Enable Full Redundancy Elimination (FRE) on trees Enable loop invariant motion on trees Create canonical induction variables in loops Enable linear loop transforms on trees Enable loop optimizations on tree level Perform live range splitting during the SSA->normal pass Enable automatic parallelization of loops Enable SSA-PRE optimization on trees Enable reassociation on tree level Perform structural alias analysis Enable copy propagation of scalar-evolution information. Enable SSA code sinking on trees Perform scalar replacement of aggregates Enable SSA-CCP optimization for stores and loads Replace temporary expressions in the SSA->normal pass Enable loop versioning when doing loop vectorization on trees Enable loop vectorization on trees -ftree-vectorizer-verbose= Set the verbosity level of the vectorizer Perform Value Range Propagation on trees Append underscores to externally visible names Compile whole compilation unit at a time Perform loop unrolling for all loops Perform loop unrolling when iteration count is known Allow loop optimizations to assume that the loops behave in normal way Allow math optimizations that may violate IEEE or ISO standards When "signed" or "unsigned" is not given make the bitfield unsigned Make "char" unsigned by default Just generate unwind tables for exception handling Generate code for the Boehm GC Use __cxa_atexit to register destructors Use __cxa_get_exception_ptr in exception handling Call a library routine to do integer divisions Perform variable tracking and also tag variables that are uninitialized -fvariable-expansion-in-unroller Apply variable expansion when loops are unrolled Enable use of cost model in vectorization Add extra commentary to assembler output Marks all inlined methods as having hidden visibility Changes visibility to match Microsoft Visual Studio by default -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility Use expression value profiles in optimizations Discard unused virtual functions Implement vtables using thunks Emit common-like symbols as weak symbols Construct webs and split unrelated uses of single variable Perform whole program optimizations -fwide-exec-charset= Convert all wide strings and character constants to character set Generate a #line directive pointing at the current working directory Assume signed arithmetic overflow wraps around Emit cross referencing information Put zero initialized data in the bss section Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode Generate debug information in default format Generate debug information in COFF format Generate debug information in DWARF v2 format Dump declarations to a .decl file Generate debug information in default extended format -gnat Specify options to GNAT Generate debug information in STABS format Generate debug information in extended STABS format Generate debug information in VMS format Generate debug information in XCOFF format Generate debug information in extended XCOFF format -idirafter Add to the end of the system include path -imacros Accept definition of macros in -imultilib Set to be the multilib include subdirectory -include Include the contents of before other files -iprefix Specify as a prefix for next two options -iquote Add to the end of the quote include path -isysroot Set to be the system root directory -isystem Add to the start of the system include path -iwithprefix Add to the end of the system include path -iwithprefixbefore Add to the end of the main include path Generate default single-precision SH2a code Generate only single-precision SH2a code Generate SH4-100 FPU-less code Generate default single-precision SH4-100 code Generate only single-precision SH4-100 code Generate SH4-200 FPU-less code Generate default single-precision SH4-200 code Generate only single-precision SH4-200 code Generate SH4-300 FPU-less code Generate default single-precision SH4-300 code Generate only single-precision SH4-300 code Generate code for SH4 340 series (MMU/FPU-less) Generate code for SH4 400 series (MMU/FPU-less) Generate code for SH4 500 series (FPU-less). Generate default single-precision SH4 code Generate only single-precision SH4 code Generate default single-precision SH4a code Generate only single-precision SH4a code Generate 32-bit FPU-less SHmedia code Generate 64-bit FPU-less SHmedia code Generate FPU-less SHcompact code Throttle unrolling to avoid thrashing target registers unless the unroll benefit outweighs this Generate code in big endian mode Generate 32-bit offsets in switch tables Cost to assume for a branch insn Emit cmpeqdi_t pattern even when -mcbranchdi and -mexpand-cbranchdi are in effect. Align doubles at 64-bit boundaries Division strategy, one of: call, call2, fp, inv, inv:minlat, inv20u, inv20l, inv:call, inv:call2, inv:fp, call-div1, call-fp, call-table Specify name for 32 bit signed division function Expand cbranchdi4 pattern early into separate comparisons and branches. Enable the use of the fused floating point multiply-accumulate operation Use GNU libc instead of uClibc Follow Renesas (formerly Hitachi) / SuperH calling conventions Increase the IEEE compliance for floating-point code Enable the use of the indexed addressing mode for SHmedia32/SHcompact inline code to invalidate instruction cache entries after setting up nested function trampolines Assume symbols might be invalid Annotate assembler instructions with estimated addresses Generate code in little endian mode Mark MAC register as call-clobbered Make structs a multiple of 4 bytes (warning: ABI altered) Emit function-calls using global offset table when generating PIC Pretend a branch-around-a-move is a conditional move. Assume pt* instructions won't trap Shorten address references during linking Use uClibc instead of GNU libc Cost to assume for a multiply insn Don't generate privileged-mode only code; implies -mno-inline-ic_invalidate if the inline code would not work in user mode. Do not search standard system include directories (those specified with -isystem will still be used) Do not search standard system include directories for C++ -o Place output into Issue warnings needed for strict compliance to the standard Like -pedantic but issue them as errors Create a position independent executable Generate C header of platform-specific features Print a checksum of the executable for PCH validity checking, and stop Do not display functions compiled or elapsed time Remap file names when including files Statically link the GNU Fortran helper library (libgfortran) Conform to the ISO 1998 C++ standard, with extensions that are likely to Conform to the ISO 1998 C++ standard Conform to the ISO 1990 C standard Conform to the ISO 1999 C standard Deprecated in favor of -std=c99 Conform to the ISO Fortran 2003 standard Conform to the ISO Fortran 95 standard Conform to nothing in particular Conform to the ISO 1998 C++ standard, with GNU extensions and Conform to the ISO 1998 C++ standard with GNU extensions Conform to the ISO 1990 C standard with GNU extensions Conform to the ISO 1999 C standard with GNU extensions Deprecated in favor of -std=gnu99 Conform to the ISO 1990 C standard as amended in 1994 Deprecated in favor of -std=iso9899:1999 Accept extensions to support legacy code Enable traditional preprocessing -trigraphs Support ISO C trigraphs Do not predefine system-specific and GCC-specific macros -static-libgcc -shared-libgcc _ROOT /opt/codesourcery
