Zilog ZUSBOPTS Uživatelský manuál stáhnout pdf (Strana 199)

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101

UM017105-0511 Predefined Macros

Zilog Developer Studio II – ZNEO™

User Manual

171

All predefined macro names begin with two underscores and end with two underscores.

Examples

The following program illustrates the use of some of these predefined macros:

#include <stdio.h>

void main()

{

#ifdef __ZILOG__

printf("Zilog Compiler ");

#endif

#ifdef __ZNEO__

printf("For ZNEO ");

#endif

#ifdef __ZDATE__

printf("Built on %d.\n", __ZDATE__);

#endif

}

__CONST_IN_ROM__ This macro indicates that the const variables are placed in

ROM. This macro, which is optional in some other Zilog proces-

sor architectures, must always be defined for the ZNEO.

__MODEL__ This macro indicates the memory model used by the compiler

as follows:

0Small Model

3Large Model

__UNSIGNED_CHARS__ This macro is defined if the plain char type is implemented as

unsigned char.

__ZDATE__ This macro expands to the build date of the compiler in the for-

mat YYYYMMDD. For example, if the compiler were built on

May 31, 2006, then __ZDATE__ expands to 20060531. This

macro gives a means to test for a particular Zilog release or to

test that the compiler is released after a new feature has been

added.

__ZILOG__ This macro is defined and set to 1 on all Zilog compilers to indi-

cate that the compiler is provided by Zilog.

__ZNEO__ This macro is defined and set to 1 for the ZNEO compiler and is

otherwise undefined.

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