GAS --help

MinGW을 기준으로 설정된 사용 설명서 원본이다.

Usage: as [option...] [asmfile...]

Options:

  -a[sub-option...]  turn on listings

                       Sub-options [default hls]:

                       c      omit false conditionals

                       d      omit debugging directives

                       g      include general info

                       h      include high-level source

                       l      include assembly

                       m      include macro expansions

                       n      omit forms processing

                       s      include symbols

                       =FILE  list to FILE (must be last sub-option)

  --alternate             initially turn on alternate macro syntax

  -D                      produce assembler debugging messages

  --debug-prefix-map OLD=NEW

                          map OLD to NEW in debug information

  --defsym SYM=VAL        define symbol SYM to given value

  -f                      skip whitespace and comment preprocessing

  -g --gen-debug          generate debugging information

  --gstabs                generate STABS debugging information

  --gstabs+               generate STABS debug info with GNU extensions

  --gdwarf-2              generate DWARF2 debugging information

  --hash-size=<value>     set the hash table size close to <value>

  --help                  show this message and exit

  --target-help           show target specific options

  -I DIR                  add DIR to search list for .include directives

  -J                      don't warn about signed overflow

  -K                      warn when differences altered for long displacements

  -L,--keep-locals        keep local symbols (e.g. starting with `L')

  -M,--mri                assemble in MRI compatibility mode

  --MD FILE               write dependency information in FILE (default none)

  -nocpp                  ignored

  -o OBJFILE              name the object-file output OBJFILE (default a.out)

  -R                      fold data section into text section

  --reduce-memory-overheads 

                          prefer smaller memory use at the cost of longer

                          assembly times

  --statistics            print various measured statistics from execution

  --strip-local-absolute  strip local absolute symbols

  --traditional-format    Use same format as native assembler when possible

  --version               print assembler version number and exit

  -W  --no-warn           suppress warnings

  --warn                  don't suppress warnings

  --fatal-warnings        treat warnings as errors

  -w                      ignored

  -X                      ignored

  -Z                      generate object file even after errors

  --listing-lhs-width     set the width in words of the output data column of

                          the listing

  --listing-lhs-width2    set the width in words of the continuation lines

                          of the output data column; ignored if smaller than

                          the width of the first line

  --listing-rhs-width     set the max width in characters of the lines from

                          the source file

  --listing-cont-lines    set the maximum number of continuation lines used

                          for the output data column of the listing

  @FILE                   read options from FILE

  -n                      Do not optimize code alignment

  -q                      quieten some warnings

  --32/--64/--x32         generate 32bit/64bit/x32 code

  --divide                ignored

  -march=CPU[,+EXTENSION...]

                          generate code for CPU and EXTENSION, CPU is one of:

                           generic32, generic64, i386, i486, i586, i686,

                           pentium, pentiumpro, pentiumii, pentiumiii, pentium4,

                           prescott, nocona, core, core2, corei7, l1om, k1om,

                           k6, k6_2, athlon, opteron, k8, amdfam10, bdver1,

                           bdver2, bdver3, btver1, btver2

                          EXTENSION is combination of:

                           8087, 287, 387, no87, mmx, nommx, sse, sse2, sse3,

                           ssse3, sse4.1, sse4.2, sse4, nosse, avx, avx2, noavx,

                           vmx, vmfunc, smx, xsave, xsaveopt, aes, pclmul,

                           fsgsbase, rdrnd, f16c, bmi2, fma, fma4, xop, lwp,

                           movbe, cx16, ept, lzcnt, hle, rtm, invpcid, clflush,

                           nop, syscall, rdtscp, 3dnow, 3dnowa, padlock, svme,

                           sse4a, abm, bmi, tbm, adx, rdseed, prfchw, smap

  -mtune=CPU              optimize for CPU, CPU is one of:

                           generic32, generic64, i8086, i186, i286, i386, i486,

                           i586, i686, pentium, pentiumpro, pentiumii,

                           pentiumiii, pentium4, prescott, nocona, core, core2,

                           corei7, l1om, k1om, k6, k6_2, athlon, opteron, k8,

                           amdfam10, bdver1, bdver2, bdver3, btver1, btver2

  -msse2avx               encode SSE instructions with VEX prefix

  -msse-check=[none|error|warning]

                          check SSE instructions

  -moperand-check=[none|error|warning]

                          check operand combinations for validity

  -mavxscalar=[128|256]   encode scalar AVX instructions with specific vector

                           length

  -mmnemonic=[att|intel]  use AT&T/Intel mnemonic

  -msyntax=[att|intel]    use AT&T/Intel syntax

  -mindex-reg             support pseudo index registers

  -mnaked-reg             don't require `%' prefix for registers

  -mold-gcc               support old (<= 2.8.1) versions of gcc

Report bugs to <mingw-w64-public@lists.sourceforge.net>