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(as.info)Invoking

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Command-Line Options
********************

   This chapter describes command-line options available in _all_
versions of the GNU assembler; Note: Machine Dependencies, for
options specific to particular machine architectures.

   If you are invoking `as' via the GNU C compiler (version 2), you can
use the `-Wa' option to pass arguments through to the assembler.  The
assembler arguments must be separated from each other (and the `-Wa')
by commas.  For example:

     gcc -c -g -O -Wa,-alh,-L file.c

This passes two options to the assembler: `-alh' (emit a listing to
standard output with with high-level and assembly source) and `-L'
(retain local symbols in the symbol table).

   Usually you do not need to use this `-Wa' mechanism, since many
compiler command-line options are automatically passed to the assembler
by the compiler.  (You can call the GNU compiler driver with the `-v'
option to see precisely what options it passes to each compilation
pass, including the assembler.)

a

-a[cdhlns] enable listings

D

-D for compatibility

f

-f to work faster

I

-I for .include search path

K

-K for difference tables

L

-L to retain local labels

listing

--listing-XXX to configure listing output

M

-M or --mri to assemble in MRI compatibility mode

MD

--MD for dependency tracking

o

-o to name the object file

R

-R to join data and text sections

statistics

--statistics to see statistics about assembly

traditional-format

--traditional-format for compatible output

v

-v to announce version

W

-W, --no-warn, --warn, --fatal-warnings to control warnings

Z

-Z to make object file even after errors