You may combine these options; for example, use `-aln' for assembly
listing without forms processing. The `=file' option, if used, must be
the last one. By itself, `-a' defaults to `-ahls'.
-D
Ignored. This option is accepted for script compatibility with calls to
other assemblers.
--defsym sym=value
Define the symbol sym to be value before assembling the input file.
value must be an integer constant. As in C, a leading `0x'
indicates a hexadecimal value, and a leading `0' indicates an octal value.
-f
"fast"---skip whitespace and comment preprocessing (assume source is
compiler output).
--gstabs
Generate stabs debugging information for each assembler line. This
may help debugging assembler code, if the debugger can handle it.
--help
Print a summary of the command line options and exit.
-I dir
Add directory dir to the search list for .include directives.
-J
Don't warn about signed overflow.
-K
Issue warnings when difference tables altered for long displacements.
-L
--keep-locals
Keep (in the symbol table) local symbols. On traditional a.out systems
these start with `L', but different systems have different local
label prefixes.
-o objfile
Name the object-file output from asobjfile.
-R
Fold the data section into the text section.
--statistics
Print the maximum space (in bytes) and total time (in seconds) used by
assembly.
--strip-local-absolute
Remove local absolute symbols from the outgoing symbol table.
-v
-version
Print the as version.
--version
Print the as version and exit.
-W
Suppress warning messages.
-w
Ignored.
-x
Ignored.
-Z
Generate an object file even after errors.
-- | files ...
Standard input, or source files to assemble.
The following options are available when as is configured for
an ARC processor.
-mbig-endian
Generate "big endian" format output.
-mlittle-endian
Generate "little endian" format output.
The following options are available when as is configured for the ARM
processor family.
Specify what processor in the 68000 family is the target. The default
is normally the 68020, but this can be changed at configuration time.
-m68881 | -m68882 | -mno-68881 | -mno-68882
The target machine does (or does not) have a floating-point coprocessor.
The default is to assume a coprocessor for 68020, 68030, and cpu32. Although
the basic 68000 is not compatible with the 68881, a combination of the
two can be specified, since it's possible to do emulation of the
coprocessor instructions with the main processor.
-m68851 | -mno-68851
The target machine does (or does not) have a memory-management
unit coprocessor. The default is to assume an MMU for 68020 and up.
The following options are available when as is configured
for the SPARC architecture:
-Av6 | -Av7 | -Av8 | -Asparclet | -Asparclite
-Av8plus | -Av8plusa | -Av9 | -Av9a
Explicitly select a variant of the SPARC architecture.
`-Av8plus' and `-Av8plusa' select a 32 bit environment.
`-Av9' and `-Av9a' select a 64 bit environment.
`-Av8plusa' and `-Av9a' enable the SPARC V9 instruction set with
UltraSPARC extensions.
-xarch=v8plus | -xarch=v8plusa
For compatibility with the Solaris v9 assembler. These options are
equivalent to -Av8plus and -Av8plusa, respectively.
-bump
Warn when the assembler switches to another architecture.
The following options are available when as is configured for
a MIPS processor.
-G num
This option sets the largest size of an object that can be referenced
implicitly with the gp register. It is only accepted for targets that
use ECOFF format, such as a DECstation running Ultrix. The default value is 8.
-EB
Generate "big endian" format output.
-EL
Generate "little endian" format output.
-mips1
-mips2
-mips3
Generate code for a particular MIPS Instruction Set Architecture level.
`-mips1' corresponds to the R2000 and R3000 processors,
`-mips2' to the R6000 processor, and `-mips3' to the R4000
processor.
-m4650
-no-m4650
Generate code for the MIPS R4650 chip. This tells the assembler to accept
the `mad' and `madu' instruction, and to not schedule `nop'
instructions around accesses to the `HI' and `LO' registers.
`-no-m4650' turns off this option.
-mcpu=CPU
Generate code for a particular MIPS cpu. This has little effect on the
assembler, but it is passed by gcc.
--emulation=name
This option causes as to emulate as configured
for some other target, in all respects, including output format (choosing
between ELF and ECOFF only), handling of pseudo-opcodes which may generate
debugging information or store symbol table information, and default
endianness. The available configuration names are: `mipsecoff',
`mipself', `mipslecoff', `mipsbecoff', `mipslelf',
`mipsbelf'. The first two do not alter the default endianness from that
of the primary target for which the assembler was configured; the others change
the default to little- or big-endian as indicated by the `b' or `l'
in the name. Using `-EB' or `-EL' will override the endianness
selection in any case.
This option is currently supported only when the primary target
as is configured for is a MIPS ELF or ECOFF target.
Furthermore, the primary target or others specified with
`--enable-targets=...' at configuration time must include support for
the other format, if both are to be available. For example, the Irix 5
configuration includes support for both.
Eventually, this option will support more configurations, with more
fine-grained control over the assembler's behavior, and will be supported for
more processors.
-nocpp
as ignores this option. It is accepted for compatibility with
the native tools.
--trap
--no-trap
--break
--no-break
Control how to deal with multiplication overflow and division by zero.
`--trap' or `--no-break' (which are synonyms) take a trap exception
(and only work for Instruction Set Architecture level 2 and higher);
`--break' or `--no-trap' (also synonyms, and the default) take a
break exception.