-fvisibility-ms-compat @gol
-fext-numeric-literals @gol
-Wabi=@var{n} -Wabi-tag -Wconversion-null -Wctor-dtor-privacy @gol
--Wdelete-non-virtual-dtor -Wdeprecated-copy -Wliteral-suffix @gol
--Wmultiple-inheritance -Wno-init-list-lifetime @gol
+-Wdelete-non-virtual-dtor -Wdeprecated-copy -Wliteral-suffix @gol
+-Wmultiple-inheritance -Wno-init-list-lifetime @gol
-Wnamespaces -Wnarrowing @gol
-Wpessimizing-move -Wredundant-move @gol
-Wnoexcept -Wnoexcept-type -Wclass-memaccess @gol
-fdiagnostics-color=@r{[}auto@r{|}never@r{|}always@r{]} @gol
-fdiagnostics-format=@r{[}text@r{|}json@r{]} @gol
-fno-diagnostics-show-option -fno-diagnostics-show-caret @gol
--fno-diagnostics-show-labels -fno-diagnostics-show-line-numbers @gol
+-fno-diagnostics-show-labels -fno-diagnostics-show-line-numbers @gol
-fdiagnostics-minimum-margin-width=@var{width} @gol
-fdiagnostics-parseable-fixits -fdiagnostics-generate-patch @gol
--fdiagnostics-show-template-tree -fno-elide-type @gol
+-fdiagnostics-show-template-tree -fno-elide-type @gol
-fno-show-column}
@item Warning Options
@gccoptlist{-fsyntax-only -fmax-errors=@var{n} -Wpedantic @gol
-pedantic-errors @gol
-w -Wextra -Wall -Waddress -Waggregate-return -Waligned-new @gol
--Walloc-zero -Walloc-size-larger-than=@var{byte-size}
+-Walloc-zero -Walloc-size-larger-than=@var{byte-size} @gol
-Walloca -Walloca-larger-than=@var{byte-size} @gol
-Wno-aggressive-loop-optimizations -Warray-bounds -Warray-bounds=@var{n} @gol
--Wno-attributes -Wno-attribute-alias @gol
+-Wno-attributes -Wno-attribute-alias @gol
-Wbool-compare -Wbool-operation @gol
-Wno-builtin-declaration-mismatch @gol
-Wno-builtin-macro-redefined -Wc90-c99-compat -Wc99-c11-compat @gol
-Werror -Werror=* -Wextra-semi -Wfatal-errors @gol
-Wfloat-equal -Wformat -Wformat=2 @gol
-Wno-format-contains-nul -Wno-format-extra-args @gol
--Wformat-nonliteral -Wformat-overflow=@var{n} @gol
+-Wformat-nonliteral -Wformat-overflow=@var{n} @gol
-Wformat-security -Wformat-signedness -Wformat-truncation=@var{n} @gol
-Wformat-y2k -Wframe-address @gol
-Wframe-larger-than=@var{byte-size} -Wno-free-nonheap-object @gol
-Winvalid-pch -Wlarger-than=@var{byte-size} @gol
-Wlogical-op -Wlogical-not-parentheses -Wlong-long @gol
-Wmain -Wmaybe-uninitialized -Wmemset-elt-size -Wmemset-transposed-args @gol
--Wmisleading-indentation -Wno-missing-attributes -Wmissing-braces @gol
+-Wmisleading-indentation -Wno-missing-attributes -Wmissing-braces @gol
-Wmissing-field-initializers -Wmissing-include-dirs -Wmissing-profile @gol
-Wno-multichar -Wmultistatement-macros -Wnonnull -Wnonnull-compare @gol
-Wnormalized=@r{[}none@r{|}id@r{|}nfc@r{|}nfkc@r{]} @gol
-Wnull-dereference -Wodr -Wno-overflow -Wopenmp-simd @gol
-Woverride-init-side-effects -Woverlength-strings @gol
--Wpacked -Wpacked-bitfield-compat -Wpacked-not-aligned -Wpadded @gol
+-Wpacked -Wpacked-bitfield-compat -Wpacked-not-aligned -Wpadded @gol
-Wparentheses -Wno-pedantic-ms-format @gol
-Wplacement-new -Wplacement-new=@var{n} @gol
-Wpointer-arith -Wpointer-compare -Wno-pointer-to-int-cast @gol
--Wno-pragmas -Wno-prio-ctor-dtor -Wredundant-decls @gol
+-Wno-pragmas -Wno-prio-ctor-dtor -Wredundant-decls @gol
-Wrestrict -Wno-return-local-addr @gol
-Wreturn-type -Wsequence-point -Wshadow -Wno-shadow-ivar @gol
-Wshadow=global, -Wshadow=local, -Wshadow=compatible-local @gol
-Wsizeof-pointer-memaccess -Wsizeof-array-argument @gol
-Wstack-protector -Wstack-usage=@var{byte-size} -Wstrict-aliasing @gol
-Wstrict-aliasing=n -Wstrict-overflow -Wstrict-overflow=@var{n} @gol
--Wstringop-overflow=@var{n} -Wstringop-truncation @gol
+-Wstringop-overflow=@var{n} -Wstringop-truncation @gol
-Wsuggest-attribute=@r{[}pure@r{|}const@r{|}noreturn@r{|}format@r{|}malloc@r{]} @gol
-Wsuggest-final-types @gol -Wsuggest-final-methods -Wsuggest-override @gol
-Wmissing-format-attribute -Wsubobject-linkage @gol
-ginternal-reset-location-views -gno-internal-reset-location-views @gol
-ginline-points -gno-inline-points @gol
-gvms -gxcoff -gxcoff+ -gz@r{[}=@var{type}@r{]} @gol
--gsplit-dwarf -gdescribe-dies -gno-describe-dies @gol
+-gsplit-dwarf -gdescribe-dies -gno-describe-dies @gol
-fdebug-prefix-map=@var{old}=@var{new} -fdebug-types-section @gol
-fno-eliminate-unused-debug-types @gol
-femit-struct-debug-baseonly -femit-struct-debug-reduced @gol
-fif-conversion2 -findirect-inlining @gol
-finline-functions -finline-functions-called-once -finline-limit=@var{n} @gol
-finline-small-functions -fipa-cp -fipa-cp-clone @gol
--fipa-bit-cp -fipa-vrp @gol
--fipa-pta -fipa-profile -fipa-pure-const -fipa-reference -fipa-reference-addressable @gol
+-fipa-bit-cp -fipa-vrp -fipa-pta -fipa-profile -fipa-pure-const @gol
+-fipa-reference -fipa-reference-addressable @gol
-fipa-stack-alignment -fipa-icf -fira-algorithm=@var{algorithm} @gol
-fira-region=@var{region} -fira-hoist-pressure @gol
-fira-loop-pressure -fno-ira-share-save-slots @gol
@gccoptlist{-p -pg -fprofile-arcs --coverage -ftest-coverage @gol
-fprofile-abs-path @gol
-fprofile-dir=@var{path} -fprofile-generate -fprofile-generate=@var{path} @gol
--fprofile-update=@var{method} -fprofile-filter-files=@var{regex} -fprofile-exclude-files=@var{regex} @gol
+-fprofile-update=@var{method} -fprofile-filter-files=@var{regex} @gol
+-fprofile-exclude-files=@var{regex} @gol
-fsanitize=@var{style} -fsanitize-recover -fsanitize-recover=@var{style} @gol
-fasan-shadow-offset=@var{number} -fsanitize-sections=@var{s1},@var{s2},... @gol
-fsanitize-undefined-trap-on-error -fbounds-check @gol
-dD -dI -dM -dN -dU @gol
-fdebug-cpp -fdirectives-only -fdollars-in-identifiers @gol
-fexec-charset=@var{charset} -fextended-identifiers @gol
--finput-charset=@var{charset} -fmacro-prefix-map=@var{old}=@var{new} @gol
--fno-canonical-system-headers @gol -fpch-deps -fpch-preprocess @gol
--fpreprocessed -ftabstop=@var{width} -ftrack-macro-expansion @gol
+-finput-charset=@var{charset} -fmacro-prefix-map=@var{old}=@var{new} @gol
+-fno-canonical-system-headers -fpch-deps -fpch-preprocess @gol
+-fpreprocessed -ftabstop=@var{width} -ftrack-macro-expansion @gol
-fwide-exec-charset=@var{charset} -fworking-directory @gol
-H -imacros @var{file} -include @var{file} @gol
-M -MD -MF -MG -MM -MMD -MP -MQ -MT @gol
-nostartfiles -nodefaultlibs -nolibc -nostdlib @gol
-e @var{entry} --entry=@var{entry} @gol
-pie -pthread -r -rdynamic @gol
--s -static -static-pie -static-libgcc -static-libstdc++ @gol
+-s -static -static-pie -static-libgcc -static-libstdc++ @gol
-static-libasan -static-libtsan -static-liblsan -static-libubsan @gol
-shared -shared-libgcc -symbolic @gol
-T @var{script} -Wl,@var{option} -Xlinker @var{option} @gol
-fdisable-rtl-@var{pass-name}=@var{range-list} @gol
-fdisable-tree-@var{pass_name} @gol
-fdisable-tree-@var{pass-name}=@var{range-list} @gol
--fdump-debug -fdump-earlydebug @gol
+-fdump-debug -fdump-earlydebug @gol
-fdump-noaddr -fdump-unnumbered -fdump-unnumbered-links @gol
-fdump-class-hierarchy@r{[}-@var{n}@r{]} @gol
-fdump-final-insns@r{[}=@var{file}@r{]} @gol
@gccoptlist{-mabi=@var{name} -mbig-endian -mlittle-endian @gol
-mgeneral-regs-only @gol
-mcmodel=tiny -mcmodel=small -mcmodel=large @gol
--mstrict-align -mno-strict-align @gol
+-mstrict-align -mno-strict-align @gol
-momit-leaf-frame-pointer @gol
-mtls-dialect=desc -mtls-dialect=traditional @gol
-mtls-size=@var{size} @gol
-mpc-relative-literal-loads @gol
-msign-return-address=@var{scope} @gol
-march=@var{name} -mcpu=@var{name} -mtune=@var{name} @gol
--moverride=@var{string} -mverbose-cost-dump -mtrack-speculation}
+-moverride=@var{string} -mverbose-cost-dump -mtrack-speculation}
@emph{Adapteva Epiphany Options}
@gccoptlist{-mhalf-reg-file -mprefer-short-insn-regs @gol
-msplit-vecmove-early -m1reg-@var{reg}}
@emph{ARC Options}
-@gccoptlist{-mbarrel-shifter -mjli-always @gol
+@gccoptlist{-mbarrel-shifter -mjli-always @gol
-mcpu=@var{cpu} -mA6 -mARC600 -mA7 -mARC700 @gol
-mdpfp -mdpfp-compact -mdpfp-fast -mno-dpfp-lrsr @gol
-mea -mno-mpy -mmul32x16 -mmul64 -matomic @gol
-mnorm -mspfp -mspfp-compact -mspfp-fast -msimd -msoft-float -mswap @gol
-mcrc -mdsp-packa -mdvbf -mlock -mmac-d16 -mmac-24 -mrtsc -mswape @gol
-mtelephony -mxy -misize -mannotate-align -marclinux -marclinux_prof @gol
--mlong-calls -mmedium-calls -msdata -mirq-ctrl-saved @gol
--mrgf-banked-regs -mlpc-width=@var{width} -G @var{num} @gol
+-mlong-calls -mmedium-calls -msdata -mirq-ctrl-saved @gol
+-mrgf-banked-regs -mlpc-width=@var{width} -G @var{num} @gol
-mvolatile-cache -mtp-regno=@var{regno} @gol
-malign-call -mauto-modify-reg -mbbit-peephole -mno-brcc @gol
-mcase-vector-pcrel -mcompact-casesi -mno-cond-exec -mearly-cbranchsi @gol
-mexpand-adddi -mindexed-loads -mlra -mlra-priority-none @gol
-mlra-priority-compact mlra-priority-noncompact -mmillicode @gol
-mmixed-code -mq-class -mRcq -mRcw -msize-level=@var{level} @gol
--mtune=@var{cpu} -mmultcost=@var{num} -mcode-density-frame @gol
+-mtune=@var{cpu} -mmultcost=@var{num} -mcode-density-frame @gol
-munalign-prob-threshold=@var{probability} -mmpy-option=@var{multo} @gol
--mdiv-rem -mcode-density -mll64 -mfpu=@var{fpu} -mrf16 -mbranch-index}
+-mdiv-rem -mcode-density -mll64 -mfpu=@var{fpu} -mrf16 -mbranch-index}
@emph{ARM Options}
@gccoptlist{-mapcs-frame -mno-apcs-frame @gol
-mapcs-reentrant -mno-apcs-reentrant @gol
-msched-prolog -mno-sched-prolog @gol
-mlittle-endian -mbig-endian @gol
--mbe8 -mbe32 @gol
+-mbe8 -mbe32 @gol
-mfloat-abi=@var{name} @gol
-mfp16-format=@var{name}
-mthumb-interwork -mno-thumb-interwork @gol
-mbranch-cost=@var{cost} @gol
-mcall-prologues -mgas-isr-prologues -mint8 @gol
-mn_flash=@var{size} -mno-interrupts @gol
--mmain-is-OS_task -mrelax -mrmw -mstrict-X -mtiny-stack @gol
+-mmain-is-OS_task -mrelax -mrmw -mstrict-X -mtiny-stack @gol
-mfract-convert-truncate @gol
-mshort-calls -nodevicelib @gol
-Waddr-space-convert -Wmisspelled-isr}
-mmemcpy -mxl-soft-mul -mxl-soft-div -mxl-barrel-shift @gol
-mxl-pattern-compare -mxl-stack-check -mxl-gp-opt -mno-clearbss @gol
-mxl-multiply-high -mxl-float-convert -mxl-float-sqrt @gol
--mbig-endian -mlittle-endian -mxl-reorder -mxl-mode-@var{app-model}
+-mbig-endian -mlittle-endian -mxl-reorder -mxl-mode-@var{app-model} @gol
-mpic-data-is-text-relative}
@emph{MIPS Options}
-meva -mno-eva @gol
-mvirt -mno-virt @gol
-mxpa -mno-xpa @gol
--mcrc -mno-crc @gol
--mginv -mno-ginv @gol
+-mcrc -mno-crc @gol
+-mginv -mno-ginv @gol
-mmicromips -mno-micromips @gol
-mmsa -mno-msa @gol
-mloongson-mmi -mno-loongson-mmi @gol
-mcompact-branches=@var{policy} @gol
-mfp-exceptions -mno-fp-exceptions @gol
-mvr4130-align -mno-vr4130-align -msynci -mno-synci @gol
--mlxc1-sxc1 -mno-lxc1-sxc1 -mmadd4 -mno-madd4 @gol
+-mlxc1-sxc1 -mno-lxc1-sxc1 -mmadd4 -mno-madd4 @gol
-mrelax-pic-calls -mno-relax-pic-calls -mmcount-ra-address @gol
-mframe-header-opt -mno-frame-header-opt}
@emph{Nios II Options}
@gccoptlist{-G @var{num} -mgpopt=@var{option} -mgpopt -mno-gpopt @gol
--mgprel-sec=@var{regexp} -mr0rel-sec=@var{regexp} @gol
+-mgprel-sec=@var{regexp} -mr0rel-sec=@var{regexp} @gol
-mel -meb @gol
-mno-bypass-cache -mbypass-cache @gol
-mno-cache-volatile -mcache-volatile @gol
@gccoptlist{-m32 -m64 -mmainkernel -moptimize}
@emph{OpenRISC Options}
-@gccoptlist{-mboard=@var{name} -mnewlib -mhard-mul -mhard-div @gol
--msoft-mul -msoft-div @gol
--mcmov -mror -msext -msfimm -mshftimm}
+@gccoptlist{-mboard=@var{name} -mnewlib -mhard-mul -mhard-div @gol
+-msoft-mul -msoft-div @gol
+-mcmov -mror -msext -msfimm -mshftimm}
@emph{PDP-11 Options}
@gccoptlist{-mfpu -msoft-float -mac0 -mno-ac0 -m40 -m45 -m10 @gol
--mint32 -mno-int16 -mint16 -mno-int32 @gol
--msplit -munix-asm -mdec-asm -mgnu-asm -mlra}
+-mint32 -mno-int16 -mint16 -mno-int32 @gol
+-msplit -munix-asm -mdec-asm -mgnu-asm -mlra}
@emph{picoChip Options}
@gccoptlist{-mae=@var{ae_type} -mvliw-lookahead=@var{N} @gol
-mcompat-align-parm -mno-compat-align-parm @gol
-mfloat128 -mno-float128 @gol
-mgnu-attribute -mno-gnu-attribute @gol
--mstack-protector-guard=@var{guard} -mstack-protector-guard-reg=@var{reg} @gol
+-mstack-protector-guard=@var{guard} -mstack-protector-guard-reg=@var{reg} @gol
-mstack-protector-guard-offset=@var{offset}}
@emph{RISC-V Options}
-mpreferred-stack-boundary=@var{num} @gol
-msmall-data-limit=@var{N-bytes} @gol
-msave-restore -mno-save-restore @gol
--mstrict-align -mno-strict-align @gol
--mcmodel=medlow -mcmodel=medany @gol
+-mstrict-align -mno-strict-align @gol
+-mcmodel=medlow -mcmodel=medany @gol
-mexplicit-relocs -mno-explicit-relocs @gol
--mrelax -mno-relax @gol}
+-mrelax -mno-relax}
@emph{RL78 Options}
@gccoptlist{-msim -mmul=none -mmul=g13 -mmul=g14 -mallregs @gol
-muser-mode -mno-user-mode @gol
-mv8plus -mno-v8plus -mvis -mno-vis @gol
-mvis2 -mno-vis2 -mvis3 -mno-vis3 @gol
--mvis4 -mno-vis4 -mvis4b -mno-vis4b @gol
+-mvis4 -mno-vis4 -mvis4b -mno-vis4b @gol
-mcbcond -mno-cbcond -mfmaf -mno-fmaf -mfsmuld -mno-fsmuld @gol
-mpopc -mno-popc -msubxc -mno-subxc @gol
-mfix-at697f -mfix-ut699 -mfix-ut700 -mfix-gr712rc @gol
-mincoming-stack-boundary=@var{num} @gol
-mcld -mcx16 -msahf -mmovbe -mcrc32 @gol
-mrecip -mrecip=@var{opt} @gol
--mvzeroupper -mprefer-avx128 -mprefer-vector-width=@var{opt} @gol
+-mvzeroupper -mprefer-avx128 -mprefer-vector-width=@var{opt} @gol
-mmmx -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 -mavx @gol
-mavx2 -mavx512f -mavx512pf -mavx512er -mavx512cd -mavx512vl @gol
-mavx512bw -mavx512dq -mavx512ifma -mavx512vbmi -msha -maes @gol
--mpclmul -mfsgsbase -mrdrnd -mf16c -mfma -mpconfig -mwbnoinvd -mptwrite @gol
--mprefetchwt1 -mclflushopt -mxsavec -mxsaves @gol
+-mpclmul -mfsgsbase -mrdrnd -mf16c -mfma -mpconfig -mwbnoinvd @gol
+-mptwrite -mprefetchwt1 -mclflushopt -mxsavec -mxsaves @gol
-msse4a -m3dnow -m3dnowa -mpopcnt -mabm -mbmi -mtbm -mfma4 -mxop @gol
-mlzcnt -mbmi2 -mfxsr -mxsave -mxsaveopt -mrtm -mlwp @gol
--mmwaitx -mclzero -mpku -mthreads -mgfni -mvaes -mwaitpkg @gol
--mshstk -mforce-indirect-call -mavx512vbmi2 @gol
--mvpclmulqdq -mavx512bitalg -mmovdiri -mmovdir64b -mavx512vpopcntdq
--mcldemote @gol
--mms-bitfields -mno-align-stringops -minline-all-stringops @gol
+-mmwaitx -mclzero -mpku -mthreads -mgfni -mvaes -mwaitpkg @gol
+-mshstk -mforce-indirect-call -mavx512vbmi2 @gol
+-mvpclmulqdq -mavx512bitalg -mmovdiri -mmovdir64b -mavx512vpopcntdq @gol
+-mcldemote -mms-bitfields -mno-align-stringops -minline-all-stringops @gol
-minline-stringops-dynamically -mstringop-strategy=@var{alg} @gol
-mmemcpy-strategy=@var{strategy} -mmemset-strategy=@var{strategy} @gol
-mpush-args -maccumulate-outgoing-args -m128bit-long-double @gol
-mstack-protector-guard-reg=@var{reg} @gol
-mstack-protector-guard-offset=@var{offset} @gol
-mstack-protector-guard-symbol=@var{symbol} @gol
--mgeneral-regs-only -mcall-ms2sysv-xlogues @gol
--mindirect-branch=@var{choice} -mfunction-return=@var{choice} @gol
+-mgeneral-regs-only -mcall-ms2sysv-xlogues @gol
+-mindirect-branch=@var{choice} -mfunction-return=@var{choice} @gol
-mindirect-branch-register}
@emph{x86 Windows Options}
-Wunused-label @gol
-Wunused-value @gol
-Wunused-variable @gol
--Wvolatile-register-var @gol
-}
+-Wvolatile-register-var}
Note that some warning flags are not implied by @option{-Wall}. Some of
them warn about constructions that users generally do not consider
-Wuninitialized @gol
-Wshift-negative-value @r{(in C++03 and in C99 and newer)} @gol
-Wunused-parameter @r{(only with} @option{-Wunused} @r{or} @option{-Wall}@r{)} @gol
--Wunused-but-set-parameter @r{(only with} @option{-Wunused} @r{or} @option{-Wall}@r{)} @gol
-}
+-Wunused-but-set-parameter @r{(only with} @option{-Wunused} @r{or} @option{-Wall}@r{)}}
+
The option @option{-Wextra} also prints warning messages for the
following cases:
-fcrossjumping @gol
-fcse-follow-jumps -fcse-skip-blocks @gol
-fdelete-null-pointer-checks @gol
--fdevirtualize -fdevirtualize-speculatively @gol
+-fdevirtualize -fdevirtualize-speculatively @gol
-fexpensive-optimizations @gol
-fgcse -fgcse-lm @gol
-fhoist-adjacent-loads @gol
-fpartial-inlining @gol
-fpeephole2 @gol
-freorder-blocks-algorithm=stc @gol
--freorder-blocks-and-partition -freorder-functions @gol
+-freorder-blocks-and-partition -freorder-functions @gol
-frerun-cse-after-loop @gol
-fschedule-insns -fschedule-insns2 @gol
-fsched-interblock -fsched-spec @gol
-fthread-jumps @gol
-ftree-builtin-call-dce @gol
-ftree-pre @gol
--ftree-switch-conversion -ftree-tail-merge @gol
+-ftree-switch-conversion -ftree-tail-merge @gol
-ftree-vrp}
Please note the warning under @option{-fgcse} about
following options:
@gccoptlist{-mhard-float -mmfcrf -mmultiple @gol
--mpopcntb -mpopcntd @gol
--msingle-float -mdouble-float @gol
+-mpopcntb -mpopcntd @gol
+-msingle-float -mdouble-float @gol
-mfloat128}
The particular options set for any particular CPU varies between
following options:
@gccoptlist{-maltivec -mfprnd -mhard-float -mmfcrf -mmultiple @gol
--mpopcntb -mpopcntd -mpowerpc64 @gol
+-mpopcntb -mpopcntd -mpowerpc64 @gol
-mpowerpc-gpopt -mpowerpc-gfxopt @gol
--mmulhw -mdlmzb -mmfpgpr -mvsx @gol
--mcrypto -mhtm -mpower8-fusion -mpower8-vector @gol
--mquad-memory -mquad-memory-atomic -mfloat128 -mfloat128-hardware}
+-mmulhw -mdlmzb -mmfpgpr -mvsx @gol
+-mcrypto -mhtm -mpower8-fusion -mpower8-vector @gol
+-mquad-memory -mquad-memory-atomic -mfloat128 -mfloat128-hardware}
The particular options set for any particular CPU varies between
compiler versions, depending on what setting seems to produce optimal
projects / gcc.git / commitdiff