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Chapter 2. Overview

 defsym sym=value

Define the symbol

sym

to be

value

before assembling the input file.

value

must be an integer

constant. As in C, a leading

0x

indicates a hexadecimal value, and a leading

0

indicates an octal

value.

 f

"fast"  skip whitespace and comment preprocessing (assume source is compiler output).

 g

 gen debug

Generate debugging information for each assembler source line using whichever debug format is

preferred by the target. This currently means either STABS, ECOFF or DWARF2.

 gstabs

Generate stabs debugging information for each assembler line. This may help debugging assem 

bler code, if the debugger can handle it.

 gstabs+

Generate stabs debugging information for each assembler line, with GNU extensions that prob 

ably only gdb can handle, and that could make other debuggers crash or refuse to read your

program. This may help debugging assembler code. Currently the only GNU extension is the

location of the current working directory at assembling time.

 gdwarf 2

Generate DWARF2 debugging information for each assembler line. This may help debugging

assembler code, if the debugger can handle it. Note  this option is only supported by some targets,

not all of them.

 help

Print a summary of the command line options and exit.

 target help

Print a summary of all target specific options and exit.

 I dir

Add directory

dir

to the search list for

.include

directives.

 J

Don't warn about signed overflow.

 K

Issue warnings when difference tables altered for long displacements.

 L

 keep locals

Keep (in the symbol table) local symbols. On traditional a.out systems these start with

L

, but

different systems have different local label prefixes.

 listing lhs width=number

Set the maximum width, in words, of the output data column for an assembler listing to

number

.