Chapter 3. Command Line Options

23

3.10. Dependency Tracking:

 MD

as

can generate a dependency file for the file it creates. This file consists of a single rule suitable for

make

describing the dependencies of the main source file.

The rule is written to the file named in its argument.

This feature is used in the automatic updating of makefiles.

3.11. Name the Object File:

 o

There is always one object file output when you run

as

. By default it has the name

a.out

(or

b.out

,

for Intel 960 targets only). You use this option (which takes exactly one filename) to give the object

file a different name.

Whatever the object file is called,

as

overwrites any existing file of the same name.

3.12. Join Data and Text Sections:

 R

 R

tells

as

to write the object file as if all data section data lives in the text section. This is only done

at the very last moment: your binary data are the same, but data section parts are relocated differently.

The data section part of your object file is zero bytes long because all its bytes are appended to the

text section. (Chapter 5 Sections and Relocation.)

When you specify

 R

it would be possible to generate shorter address displacements (because we do

not have to cross between text and data section). We refrain from doing this simply for compatibility

with older versions of

as

. In future,

 R

may work this way.

When

as

is configured for COFF or ELF output, this option is only useful if you use sections named

.text

and

.data

.

 R

is not supported for any of the HPPA targets. Using

 R

generates a warning from

as

.

3.13. Display Assembly Statistics:

 statistics

Use

 statistics

to display two statistics about the resources used by

as

: the maximum amount of

space allocated during the assembly (in bytes), and the total execution time taken for the assembly (in

cpu seconds).

3.14. Compatible Output:

 traditional format

For some targets, the output of

as

is different in some ways from the output of some existing assem 

bler. This switch requests

as

to use the traditional format instead.

For example, it disables the exception frame optimizations which

as

normally does by default on

gcc

output.

3.15. Announce Version:

 v

You can find out what version of as is running by including the option

 v

(which you can also spell

as

 version

) on the command line.