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Chapter 2. Overview

 m68000 |  m68008 |  m68010 |  m68020 |  m68030

|  m68040 |  m68060 |  m68302 |  m68331 |  m68332

|  m68333 |  m68340 |  mcpu32 |  m5200

Specify what processor in the 68000 family is the target. The default is normally the 68020, but

this can be changed at configuration time.

 m68881 |  m68882 |  mno 68881 |  mno 68882

The target machine does (or does not) have a floating point coprocessor. The default is to assume

a coprocessor for 68020, 68030, and cpu32. Although the basic 68000 is not compatible with

the 68881, a combination of the two can be specified, since it's possible to do emulation of the

coprocessor instructions with the main processor.

 m68851 |  mno 68851

The target machine does (or does not) have a memory management unit coprocessor. The default

is to assume an MMU for 68020 and up.

For details about the PDP 11 machine dependent features options, see Section 32.1 Options.

 mpic |  mno pic

Generate position independent (or position dependent) code. The default is

 mpic

.

 mall

 mall extensions

Enable all instruction set extensions. This is the default.

 mno extensions

Disable all instruction set extensions.

 mextension |  mno extension

Enable (or disable) a particular instruction set extension.

 mcpu

Enable the instruction set extensions supported by a particular CPU, and disable all other exten 

sions.

 mmachine

Enable the instruction set extensions supported by a particular machine model, and disable all

other extensions.

The following options are available when as is configured for a picoJava processor.

 mb

Generate "big endian" format output.

 ml

Generate "little endian" format output.

The following options are available when as is configured for the Motorola 68HC11 or 68HC12 series.