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Chapter 2. Compiling with the Cx51 Compiler

2

C51 testfile.c SYMBOLS

CODE

DEBUG

#pragma SYMBOLS CODE DEBUG

In the above examples, SYMBOLS,

CODE, and DEBUG are all control directives.

testfile.c is the source file to be compiled.

NOTE

The syntax is the same for the command line and the #pragma directive.

Multiple options, however,

may be specified on the #pragma line.

Keil Software — Cx51 Compiler User’s Guide

21

Directive

Class

Description

AREGS,

Object

Enable or disable absolute register (ARn) addressing.

NOAREGS

Source

Marks the beginning and the end of an inline assembly block.

ASM, ENDASM

2

BROWSE †

Object

Enable generation of browser information.

CODE †

Listing

Add an assembly listing to the listing file.

COMPACT †

Object

Select COMPACT memory model.

COND,

Listing

Include or exclude source lines skipped by the preprocessor.

NOCOND †

DEBUG †

Object

Include debugging information in the object file.

DEFINE

Source

Define preprocessor names in the Cx51 invocation line.

DISABLE

Object

Disables interrupts for the duration of a function.

EJECT

Listing

Inserts a form feed character into the listing file.

FLOATFUZZY

Object

Specify number of bits rounded during floating compare.

INCDIR †

Source

Specify additional path names for include files.

INTERVAL †

Object

Specify the interval for interrupt vectors for SIECO chips.

INTPROMOTE,

Object

Enable or disable ANSI integer promotion.

NOINTPROMOTE †

INTVECTOR,

Object

Specify base address for interrupt vectors or disable vectors.

NOINTVECTOR †

LARGE †

Object

Select LARGE memory model.

LISTINCLUDE

Listing

Display contents of include files in the listing file.

MAXARGS †

Object

Specify size of variable argument lists.

MOD517,

Object

Enable or disable code to support the additional hardware

NOMOD517

features of the 80C517 and derivatives.

MODA2,

Object

Enable or disable dual DPTR register support for Atmel 82x8252

NOMODA2

and variants.

MODAB2,

Object

Enable or disable dual DPTR register support for Analog Device

NOMODAB2

MicroConverter ADuC B2 series.

MODDA,

Object

Enable or disable code to support the arithmetic accelerator

NOMODDA

available in Dallas 80C390, 80C400, and 5240.

MODDP2,

Object

Enable or disable dual DPTR register support for Dallas

NOMODDP2

Semiconductor 320, 520, 530, 550 and variants.

MODP2,

Object

Enable or disable dual DPTR register support for Philips and

NOMODP2

AtmelWM derivatives.

NOAMAKE †

Object

Disable information records for Vision2 Update function.

NOEXTEND †

Source

Disable Cx51 extensions to ANSI C.

OBJECT,

Object

Specify a name for the object file or suppress the object file.

NOOBJECT †

OBJECTEXTEND †

Object

Include additional variable type information in the object file.

ONEREGBANK

Object

Assume that only registerbank 0 is used in interrupt code.

22

Chapter 2. Compiling with the Cx51 Compiler

Directive

Class

Description

OMF2 †

Object

Generate OMF2 output file format.

OPTIMIZE

Object

Specify the level of optimization performed by the compiler.

ORDER †

Object

Allocate variables in the order of their appearance in the source

file.

PAGELENGTH †

Listing

Specify the number of rows on the page.

2

PAGEWIDTH †

Listing

Specify the number of columns on the page.

PREPRINT †

Listing

Produce a preprocessor listing file where all macros are

expanded.

PRINT, NOPRINT †

Listing

Specify a name for the listing file or disable the listing file.

REGFILE †

Object

Specify a register definition file for global register optimization.

REGISTERBANK

Object

Select the register bank to use for absolute register accesses.

REGPARMS,

Object

Enable or disable register parameter passing.

NOREGPARMS

RET_PSTK †,

Object

Use reentrant stack for saving return addresses.

RET_XSTK †

ROM †

Object

Control generation of AJMP/ACALL instructions.

SAVE,

Object

Saves and restores settings for AREGS, REGPARMS and

RESTORE

OPTIMIZE directives.

SMALL †

Object

Select SMALL memory model. (Default.)

SRC †

Object

Create an assembler source file instead of an object module.

STRING †

Object

Locate implicit string constants to xdata or far memory.

SYMBOLS †

Listing

Include a list of all symbols used within the module in the listing

file.

USERCLASS †

Object

Renames memory class names for flexible variable location.

VARBANKING †

Object

Enable far memory type variables.

WARNINGLEVEL †

Listing

Select the level of Warning detection.

XCROM †

Object

Assume ROM space for const xdata variables.