as: Invoking

1 
1 2 Command-Line Options
1 **********************
1 
1 This chapter describes command-line options available in _all_ versions
1 of the GNU assembler; see ⇒Machine Dependencies, for options
1 specific to particular machine architectures.
1 
1    If you are invoking 'as' via the GNU C compiler, you can use the
1 '-Wa' option to pass arguments through to the assembler.  The assembler
1 arguments must be separated from each other (and the '-Wa') by commas.
1 For example:
1 
1      gcc -c -g -O -Wa,-alh,-L file.c
1 
1 This passes two options to the assembler: '-alh' (emit a listing to
1 standard output with high-level and assembly source) and '-L' (retain
1 local symbols in the symbol table).
1 
1    Usually you do not need to use this '-Wa' mechanism, since many
1 compiler command-line options are automatically passed to the assembler
1 by the compiler.  (You can call the GNU compiler driver with the '-v'
1 option to see precisely what options it passes to each compilation pass,
1 including the assembler.)
1 

Menu

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· a             -a[cdghlns] enable listings
· alternate     -alternate enable alternate macro syntax
· D             -D for compatibility
· f             -f to work faster
· I             -I for .include search path
· K             -K for difference tables
1 
· L             -L to retain local symbols
· listing       -listing-XXX to configure listing output
· M             -M or -mri to assemble in MRI compatibility mode
· MD            -MD for dependency tracking
· no-pad-sections -no-pad-sections to stop section padding
· 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
1