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This chapter describes command-line options available in all versions of the GNU assembler; see 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
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
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