as —
an
assembler
| as |
[-D]
[-I
dir]
[-J]
[-K]
[-L |
--keep-locals]
[-R]
[-V]
[-W |
--no-warn]
[-Z]
[-a[cdghlns][=filename]]
[-g |
--gen-debug]
[-h |
--help]
[-march=cpu[,+[extensions]...]]
[-mtune=cpu]
[-n]
[-o
obj]
[-q]
[--MD
file]
[--defsym
symbol=value]
[--fatal-warnings]
[--listing-lhs-width]
[--listing-lhs-width2]
[--listing-rhs-width]
[--listing-cont-lines]
[--statistics]
[--strip-local-absolute]
[--target-help]
[--version]
[--warn]
[target-options]
[file ...] |
The
as utility creates an ELF relocatable object
from assembly language sources.
If multiple source files are specified,
as will
read each of them in the order specified. If no files are specified,
as will read from standard input.
The
as utility understands the following options:
-
-
- -D
- Display internal debugging messages.
-
-
- -I
dir
- Add the directory named by argument
dir to the search path used by the
.include directive.
-
-
- -J
- Suppress warnings about overflows in signed
arithmetic.
-
-
- -K
- Warn about alterations to difference tables if any.
-
-
- -L
|
--keep-locals
- Keep local symbols in the output file. The default is to
discard local symbols.
-
-
- -R
- Merge the
.data and
.text sections when creating an object.
-
-
- -V
- Print the assembler version on standard output before
assembling the inputs.
-
-
- -W
|
--no-warn
- Suppress assembler warnings.
-
-
- -Z
- Generate an output object even if there were errors in the
input.
-
-
- -a[cdghlns][=filename]
- Control generated listings. The supported flags are:
- c
- Omit listing code in false conditional paths.
- d
- Omit debugging directives.
- g
- Include the version of the assembler and other general
information in the generated listing.
- h
- Include high-level source in the listing.
- l
- Include assembly source in the listing.
- m
- Include macro expansions in the listing.
- n
- Suppress generation of the header and footer in the
listing.
- s
- Include symbol information in the listing.
- =filename
- Set the name of the listing file to that specified by
argument filename. If specified, this
flag must be the last in the list.
If option -a is specified without additional
arguments, a flag set of
‘hls’ is assumed.
-
-
- -g
|
--gen-debug
- Generate debug information in DWARF format.
-
-
- -h
|
--help
- Show a help message and exit.
-
-
- -march=cpu[,+[extensions]...]
- Generated code for the CPU named by argument
cpu with additional instruction set
extensions named by the argument
extensions.
-
-
- -mtune=cpu
- Optimize the assembled object for the CPU named by the
argument cpu.
-
-
- -n
- Do not optimize code alignment.
-
-
- -o
filename
- Write the assembled output to the file named by argument
filename.
-
-
- -q
- Suppress warnings.
-
-
- --MD
filename
- Write dependency information in a form usable by
make(1) to the file name
by argument filename.
-
-
- --defsym
symbol=value
- Define symbol named by the argument
symbol as having the value named by
value. The argument value is an integer
in one of the forms accepted by
atoi(3).
-
-
- --fatal-warnings
- Treat all warnings as fatal.
-
-
- --listing-lhs-width=nwords
- Set the width of the output data column in a listing to the
number of machine words specified in argument
nwords.
-
-
- --listing-lhs-width2=nwords
- Set the width of continuation lines for the data column to
the number of machine words specified in argument
nwords.
-
-
- --listing-rhs-width=nchars
- Set the maximum displayed width of an input source line to
the number of characters specified by argument
nchars.
-
-
- --listing-cont-lines=nlines
- Set the maximum number of listing lines generated by one
input source line to
nlines+1.
-
-
- --statistics
- Print statistics for the run at exit.
-
-
- --strip-local-absolute
- Remove local absolute symbols from the generated
output.
-
-
- --target-help
- Display help for the target CPU.
-
-
- --version
- Print a version identifier and exit.
-
-
- --warn
- Print warnings.
The
as utility exits 0 on success,
and >0 if an error occurs.
elfcopy(1),
ld(1),
nm(1),
strings(1),
strip(1),
elf(5)