@xref{Objective-C Dialect Options,,Options Controlling Objective-C Dialect}.
@gccoptlist{
-fconstant-string-class=@var{class name} @gol
--fgnu-runtime -fnext-runtime -gen-decls
+-fgnu-runtime -fnext-runtime -gen-decls @gol
-Wno-protocol -Wselector}
@item Language Independent Options
-fsyntax-only -pedantic -pedantic-errors @gol
-w -W -Wall -Waggregate-return @gol
-Wcast-align -Wcast-qual -Wchar-subscripts -Wcomment @gol
--Wconversion -Wdisabled-optimization -Werror @gol
+-Wconversion -Wdisabled-optimization -Werror @gol
-Wfloat-equal -Wformat -Wformat=2 @gol
--Wformat-nonliteral -Wformat-security @gol
--Wimplicit -Wimplicit-int @gol
+-Wformat-nonliteral -Wformat-security @gol
+-Wimplicit -Wimplicit-int @gol
-Wimplicit-function-declaration @gol
-Werror-implicit-function-declaration @gol
-Wimport -Winline @gol
-Wlarger-than-@var{len} -Wlong-long @gol
-Wmain -Wmissing-braces -Wmissing-declarations @gol
-Wmissing-format-attribute -Wmissing-noreturn @gol
--Wmultichar -Wno-format-extra-args -Wno-format-y2k @gol
+-Wmultichar -Wno-format-extra-args -Wno-format-y2k @gol
-Wno-import -Wpacked -Wpadded @gol
--Wparentheses -Wpointer-arith -Wredundant-decls @gol
+-Wparentheses -Wpointer-arith -Wredundant-decls @gol
-Wreturn-type -Wsequence-point -Wshadow @gol
-Wsign-compare -Wswitch -Wsystem-headers @gol
-Wtrigraphs -Wundef -Wuninitialized @gol
@item C-only Warning Options
@gccoptlist{
--Wbad-function-cast -Wmissing-prototypes -Wnested-externs @gol
--Wstrict-prototypes -Wtraditional}
+-Wbad-function-cast -Wmissing-prototypes -Wnested-externs @gol
+-Wstrict-prototypes -Wtraditional}
@item Debugging Options
@xref{Debugging Options,,Options for Debugging Your Program or GCC}.
@gccoptlist{
-a -ax -d@var{letters} -dumpspecs -dumpmachine -dumpversion @gol
--fdump-unnumbered -fdump-translation-unit=@var{file} @gol
--fdump-class-layout=@var{file} -fmem-report -fpretend-float @gol
+-fdump-unnumbered -fdump-translation-unit@r{[}-@var{n}@r{]} -fdump-class-hierarchy@r{[}-@var{n}@r{]} @gol
+-fdump-ast-original@r{[}-@var{n}@r{]} -fdump-ast-optimized@r{[}-@var{n}@r{]} @gol
+-fmem-report -fpretend-float @gol
-fprofile-arcs -ftest-coverage -ftime-report @gol
-g -g@var{level} -gcoff -gdwarf -gdwarf-1 -gdwarf-1+ -gdwarf-2 @gol
-ggdb -gstabs -gstabs+ -gxcoff -gxcoff+ @gol
-fcse-follow-jumps -fcse-skip-blocks -fdata-sections -fdce @gol
-fdelayed-branch -fdelete-null-pointer-checks @gol
-fexpensive-optimizations -ffast-math -ffloat-store @gol
--fforce-addr -fforce-mem -ffunction-sections -fgcse -fgcse-lm -fgcse-sm @gol
+-fforce-addr -fforce-mem -ffunction-sections @gol
+-fgcse -fgcse-lm -fgcse-sm @gol
-finline-functions -finline-limit=@var{n} -fkeep-inline-functions @gol
-fkeep-static-consts -fmove-all-movables @gol
-fno-default-inline -fno-defer-pop @gol
--fno-function-cse -fno-guess-branch-probability @gol
+-fno-function-cse -fno-guess-branch-probability @gol
-fno-inline -fno-math-errno -fno-peephole @gol
-funsafe-math-optimizations -fno-trapping-math @gol
-fomit-frame-pointer -foptimize-register-move @gol
@emph{M680x0 Options}
@gccoptlist{
-m68000 -m68020 -m68020-40 -m68020-60 -m68030 -m68040 @gol
--m68060 -mcpu32 -m5200 -m68881 -mbitfield -mc68000 -mc68020 @gol
--mfpa -mnobitfield -mrtd -mshort -msoft-float -mpcrel @gol
--malign-int -mstrict-align}
+-m68060 -mcpu32 -m5200 -m68881 -mbitfield -mc68000 -mc68020 @gol
+-mfpa -mnobitfield -mrtd -mshort -msoft-float -mpcrel @gol
+-malign-int -mstrict-align}
@emph{M68hc1x Options}
@gccoptlist{
-mcmodel=@var{code model} @gol
-m32 -m64 @gol
-mapp-regs -mbroken-saverestore -mcypress @gol
--mepilogue -mfaster-structs -mflat @gol
+-mepilogue -mfaster-structs -mflat @gol
-mfpu -mhard-float -mhard-quad-float @gol
-mimpure-text -mlive-g0 -mno-app-regs @gol
--mno-epilogue -mno-faster-structs -mno-flat -mno-fpu @gol
--mno-impure-text -mno-stack-bias -mno-unaligned-doubles @gol
+-mno-epilogue -mno-faster-structs -mno-flat -mno-fpu @gol
+-mno-impure-text -mno-stack-bias -mno-unaligned-doubles @gol
-msoft-float -msoft-quad-float -msparclite -mstack-bias @gol
-msupersparc -munaligned-doubles -mv8}
@emph{ARM Options}
@gccoptlist{
--mapcs-frame -mno-apcs-frame @gol
--mapcs-26 -mapcs-32 @gol
--mapcs-stack-check -mno-apcs-stack-check @gol
--mapcs-float -mno-apcs-float @gol
--mapcs-reentrant -mno-apcs-reentrant @gol
--msched-prolog -mno-sched-prolog @gol
--mlittle-endian -mbig-endian -mwords-little-endian @gol
--malignment-traps -mno-alignment-traps @gol
--msoft-float -mhard-float -mfpe @gol
--mthumb-interwork -mno-thumb-interwork @gol
--mcpu=@var{name} -march=@var{name} -mfpe=@var{name} @gol
+-mapcs-frame -mno-apcs-frame @gol
+-mapcs-26 -mapcs-32 @gol
+-mapcs-stack-check -mno-apcs-stack-check @gol
+-mapcs-float -mno-apcs-float @gol
+-mapcs-reentrant -mno-apcs-reentrant @gol
+-msched-prolog -mno-sched-prolog @gol
+-mlittle-endian -mbig-endian -mwords-little-endian @gol
+-malignment-traps -mno-alignment-traps @gol
+-msoft-float -mhard-float -mfpe @gol
+-mthumb-interwork -mno-thumb-interwork @gol
+-mcpu=@var{name} -march=@var{name} -mfpe=@var{name} @gol
-mstructure-size-boundary=@var{n} @gol
--mbsd -mxopen -mno-symrename @gol
+-mbsd -mxopen -mno-symrename @gol
-mabort-on-noreturn @gol
--mlong-calls -mno-long-calls @gol
--msingle-pic-base -mno-single-pic-base @gol
+-mlong-calls -mno-long-calls @gol
+-msingle-pic-base -mno-single-pic-base @gol
-mpic-register=@var{reg} @gol
-mnop-fun-dllimport @gol
-mpoke-function-name @gol
--mthumb -marm @gol
--mtpcs-frame -mtpcs-leaf-frame @gol
--mcaller-super-interworking -mcallee-super-interworking }
+-mthumb -marm @gol
+-mtpcs-frame -mtpcs-leaf-frame @gol
+-mcaller-super-interworking -mcallee-super-interworking }
@emph{MN10200 Options}
@gccoptlist{
@emph{MIPS Options}
@gccoptlist{
--mabicalls -mcpu=@var{cpu type}
+-mabicalls -mcpu=@var{cpu type} @gol
-membedded-data -muninit-const-in-rodata @gol
-membedded-pic -mfp32 -mfp64 -mgas -mgp32 -mgp64 @gol
-mgpopt -mhalf-pic -mhard-float -mint64 -mips1 @gol
--mips2 -mips3 -mips4 -mlong64 -mlong32 -mlong-calls -mmemcpy @gol
+-mips2 -mips3 -mips4 -mlong64 -mlong32 -mlong-calls -mmemcpy @gol
-mmips-as -mmips-tfile -mno-abicalls @gol
--mno-embedded-data -mno-uninit-const-in-rodata -mno-embedded-pic @gol
--mno-gpopt -mno-long-calls @gol
+-mno-embedded-data -mno-uninit-const-in-rodata @gol
+-mno-embedded-pic -mno-gpopt -mno-long-calls @gol
-mno-memcpy -mno-mips-tfile -mno-rnames -mno-stats @gol
-mrnames -msoft-float @gol
-m4650 -msingle-float -mmad @gol
-mstats -EL -EB -G @var{num} -nocpp @gol
--mabi=32 -mabi=n32 -mabi=64 -mabi=eabi @gol
--mfix7000 -mno-crt0}
+-mabi=32 -mabi=n32 -mabi=64 -mabi=eabi @gol
+-mfix7000 -mno-crt0}
@emph{i386 Options}
@gccoptlist{
--mcpu=@var{cpu type} -march=@var{cpu type} @gol
+-mcpu=@var{cpu type} -march=@var{cpu type} @gol
-mintel-syntax -mieee-fp -mno-fancy-math-387 @gol
-mno-fp-ret-in-387 -msoft-float -msvr3-shlib @gol
-mno-wide-multiply -mrtd -malign-double @gol
-mpreferred-stack-boundary=@var{num} @gol
--mthreads -mno-align-stringops -minline-all-stringops @gol
--mpush-args -maccumulate-outgoing-args -m128bit-long-double @gol
--m96bit-long-double -mregparm=@var{num} -momit-leaf-frame-pointer}
+-mthreads -mno-align-stringops -minline-all-stringops @gol
+-mpush-args -maccumulate-outgoing-args -m128bit-long-double @gol
+-m96bit-long-double -mregparm=@var{num} -momit-leaf-frame-pointer}
@emph{HPPA Options}
@gccoptlist{
-march=@var{architecture type} @gol
--mbig-switch -mdisable-fpregs -mdisable-indexing @gol
--mfast-indirect-calls -mgas -mjump-in-delay @gol
+-mbig-switch -mdisable-fpregs -mdisable-indexing @gol
+-mfast-indirect-calls -mgas -mjump-in-delay @gol
-mlong-load-store -mno-big-switch -mno-disable-fpregs @gol
-mno-disable-indexing -mno-fast-indirect-calls -mno-gas @gol
--mno-jump-in-delay -mno-long-load-store @gol
+-mno-jump-in-delay -mno-long-load-store @gol
-mno-portable-runtime -mno-soft-float @gol
--mno-space-regs -msoft-float -mpa-risc-1-0 @gol
--mpa-risc-1-1 -mpa-risc-2-0 -mportable-runtime @gol
+-mno-space-regs -msoft-float -mpa-risc-1-0 @gol
+-mpa-risc-1-1 -mpa-risc-2-0 -mportable-runtime @gol
-mschedule=@var{cpu type} -mspace-regs}
@emph{Intel 960 Options}
@emph{DEC Alpha Options}
@gccoptlist{
--mfp-regs -mno-fp-regs -mno-soft-float -msoft-float @gol
--malpha-as -mgas @gol
+-mfp-regs -mno-fp-regs -mno-soft-float -msoft-float @gol
+-malpha-as -mgas @gol
-mieee -mieee-with-inexact -mieee-conformant @gol
-mfp-trap-mode=@var{mode} -mfp-rounding-mode=@var{mode} @gol
-mtrap-precision=@var{mode} -mbuild-constants @gol
-mcpu=@var{cpu type} @gol
--mbwx -mno-bwx -mcix -mno-cix -mmax -mno-max @gol
+-mbwx -mno-bwx -mcix -mno-cix -mmax -mno-max @gol
-mmemory-latency=@var{time}}
@emph{Clipper Options}
@emph{H8/300 Options}
@gccoptlist{
--mrelax -mh -ms -mint32 -malign-300}
+-mrelax -mh -ms -mint32 -malign-300}
@emph{SH Options}
@gccoptlist{
@emph{TMS320C3x/C4x Options}
@gccoptlist{
--mcpu=@var{cpu} -mbig -msmall -mregparm -mmemparm @gol
--mfast-fix -mmpyi -mbk -mti -mdp-isr-reload @gol
--mrpts=@var{count} -mrptb -mdb -mloop-unsigned @gol
--mparallel-insns -mparallel-mpy -mpreserve-float}
+-mcpu=@var{cpu} -mbig -msmall -mregparm -mmemparm @gol
+-mfast-fix -mmpyi -mbk -mti -mdp-isr-reload @gol
+-mrpts=@var{count} -mrptb -mdb -mloop-unsigned @gol
+-mparallel-insns -mparallel-mpy -mpreserve-float}
@emph{V850 Options}
@gccoptlist{
--mlong-calls -mno-long-calls -mep -mno-ep @gol
--mprolog-function -mno-prolog-function -mspace @gol
--mtda=@var{n} -msda=@var{n} -mzda=@var{n} @gol
--mv850 -mbig-switch}
+-mlong-calls -mno-long-calls -mep -mno-ep @gol
+-mprolog-function -mno-prolog-function -mspace @gol
+-mtda=@var{n} -msda=@var{n} -mzda=@var{n} @gol
+-mv850 -mbig-switch}
@emph{NS32K Options}
@gccoptlist{
--m32032 -m32332 -m32532 -m32081 -m32381 -mmult-add -mnomult-add @gol
--msoft-float -mrtd -mnortd -mregparam -mnoregparam -msb -mnosb @gol
--mbitfield -mnobitfield -mhimem -mnohimem}
+-m32032 -m32332 -m32532 -m32081 -m32381 @gol
+-mmult-add -mnomult-add -msoft-float -mrtd -mnortd @gol
+-mregparam -mnoregparam -msb -mnosb @gol
+-mbitfield -mnobitfield -mhimem -mnohimem}
@emph{AVR Options}
@gccoptlist{
--mmcu=@var{mcu} -msize -minit-stack=@var{n} -mno-interrupts @gol
--mcall-prologues -mno-tablejump -mtiny-stack}
+-mmcu=@var{mcu} -msize -minit-stack=@var{n} -mno-interrupts @gol
+-mcall-prologues -mno-tablejump -mtiny-stack}
@emph{MCore Options}
@gccoptlist{
--mhardlit -mno-hardlit -mdiv -mno-div -mrelax-immediates @gol
--mno-relax-immediates -mwide-bitfields -mno-wide-bitfields @gol
--m4byte-functions -mno-4byte-functions -mcallgraph-data @gol
--mno-callgraph-data -mslow-bytes -mno-slow-bytes -mno-lsim @gol
--mlittle-endian -mbig-endian -m210 -m340 -mstack-increment}
+-mhardlit -mno-hardlit -mdiv -mno-div -mrelax-immediates @gol
+-mno-relax-immediates -mwide-bitfields -mno-wide-bitfields @gol
+-m4byte-functions -mno-4byte-functions -mcallgraph-data @gol
+-mno-callgraph-data -mslow-bytes -mno-slow-bytes -mno-lsim @gol
+-mlittle-endian -mbig-endian -m210 -m340 -mstack-increment}
@emph{IA-64 Options}
@gccoptlist{
--mbig-endian -mlittle-endian -mgnu-as -mgnu-ld -mno-pic @gol
--mvolatile-asm-stop -mb-step -mregister-names -mno-sdata @gol
--mconstant-gp -mauto-pic -minline-divide-min-latency @gol
--minline-divide-max-throughput -mno-dwarf2-asm @gol
+-mbig-endian -mlittle-endian -mgnu-as -mgnu-ld -mno-pic @gol
+-mvolatile-asm-stop -mb-step -mregister-names -mno-sdata @gol
+-mconstant-gp -mauto-pic -minline-divide-min-latency @gol
+-minline-divide-max-throughput -mno-dwarf2-asm @gol
-mfixed-range=@var{register range}}
@item Code Generation Options
-fno-common -fno-ident -fno-gnu-linker @gol
-fpcc-struct-return -fpic -fPIC @gol
-freg-struct-return -fshared-data -fshort-enums @gol
--fshort-double -fvolatile -fvolatile-global -fvolatile-static @gol
+-fshort-double -fvolatile @gol
+-fvolatile-global -fvolatile-static @gol
-fverbose-asm -fpack-struct -fstack-check @gol
-fstack-limit-register=@var{reg} -fstack-limit-symbol=@var{sym} @gol
-fargument-alias -fargument-noalias @gol
--fargument-noalias-global @gol
--fleading-underscore}
+-fargument-noalias-global -fleading-underscore}
@end table
@menu
use diff on debugging dumps for compiler invocations with different
options, in particular with and without -g.
-@item -fdump-translation-unit=@var{file} (C and C++ only)
+@item -fdump-translation-unit (C and C++ only)
+@item -fdump-translation-unit-@var{number} (C and C++ only)
Dump a representation of the tree structure for the entire translation
-unit to @var{file}.
+unit to a file. The file name is made by appending @file{.tu} to the
+source file name. If the -@var{number} form is used, @var{number}
+controls the details of the dump as described for the -fdump-tree options.
+
+@item -fdump-class-hierarchy (C++ only)
+@item -fdump-class-hierarchy-@var{number} (C++ only)
+Dump a representation of each class's hierarchy and virtual function
+table layout to a file. The file name is made by appending @file{.class}
+to the source file name. If the -@var{number} form is used, @var{number}
+controls the details of the dump as described for the -fdump-tree
+options.
+
+@item -fdump-ast-@var{switch} (C++ only)
+@item -fdump-ast-@var{switch}-@var{number} (C++ only)
+Control the dumping at various stages of processing the abstract syntax
+tree to a file. The file name is generated by appending a switch
+specific suffix to the source file name. If the -@var{number} form is
+used, @var{number} is a bit mask which controls the details of the
+dump. The following bits are meaningful (these are not set symbolically,
+as the primary function of these dumps is for debugging gcc itself):
-@item -fdump-class_layout=@var{file} (C++ only)
-@item -fdump-class_layout (C++ only)
-Dump a representation of each class's heirarchy to @var{file}, or
-@code{stderr} if not specified.
+@table @samp
+@item bit0 (1)
+Print the address of each node. Usually this is not meaningful as it
+changes according to the environment and source file.
+@item bit1 (2)
+Inhibit dumping of members of a scope or body of a function, unless they
+are reachable by some other path.
+@end table
+
+The following tree dumps are possible:
+@table @samp
+@item original
+Dump before any tree based optimization, to @file{@var{file}.original}.
+@item optimized
+Dump after all tree based optimization, to @file{@var{file}.optimized}.
+@end table
@item -fpretend-float
When running a cross-compiler, pretend that the target machine uses the
libgcc Decides which GCC support library to pass to the linker
linker Sets the name of the linker
predefines Defines to be passed to the C preprocessor
-signed_char Defines to pass to CPP to say whether @code{char} is signed by default
+signed_char Defines to pass to CPP to say whether @code{char} is signed
+ by default
startfile Object files to include at the start of the link
@end smallexample
profiling functions otherwise.)
@example
-void __cyg_profile_func_enter (void *this_fn, void *call_site);
-void __cyg_profile_func_exit (void *this_fn, void *call_site);
+void __cyg_profile_func_enter (void *this_fn,
+ void *call_site);
+void __cyg_profile_func_exit (void *this_fn,
+ void *call_site);
@end example
The first argument is the address of the start of the current function,
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