as: Command Line
1.4 Command Line
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After the program name 'as', the command line may contain options and
file names. Options may appear in any order, and may be before, after,
or between file names. The order of file names is significant.
'--' (two hyphens) by itself names the standard input file
explicitly, as one of the files for 'as' to assemble.
Except for '--' any command-line argument that begins with a hyphen
('-') is an option. Each option changes the behavior of 'as'. No
option changes the way another option works. An option is a '-'
followed by one or more letters; the case of the letter is important.
All options are optional.
Some options expect exactly one file name to follow them. The file
name may either immediately follow the option's letter (compatible with
older assemblers) or it may be the next command argument (GNU standard).
These two command lines are equivalent:
as -o my-object-file.o mumble.s
as -omy-object-file.o mumble.s
Info Catalog
as: Object Formats
as: Overview
as: Input Files