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/*
* Copyright (c) 2000-2002 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
* $Id: cdefs.h,v 1.1.1.2 2002/04/10 03:04:54 gshapiro Exp $
*/
/*
** libsm C language portability macros
** See libsm/cdefs.html for documentation.
*/
#ifndef SM_CDEFS_H
# define SM_CDEFS_H
# include <sm/config.h>
/*
** BSD and Linux have <sys/cdefs.h> which defines a set of C language
** portability macros that are a defacto standard in the open source
** community.
*/
# if SM_CONF_SYS_CDEFS_H
# include <sys/cdefs.h>
# endif /* SM_CONF_SYS_CDEFS_H */
/*
** Define the standard C language portability macros
** for platforms that lack <sys/cdefs.h>.
*/
# if !SM_CONF_SYS_CDEFS_H
# if defined(__cplusplus)
# define __BEGIN_DECLS extern "C" {
# define __END_DECLS };
# else /* defined(__cplusplus) */
# define __BEGIN_DECLS
# define __END_DECLS
# endif /* defined(__cplusplus) */
# if defined(__STDC__) || defined(__cplusplus)
# ifndef __P
# define __P(protos) protos
# endif /* __P */
# define __CONCAT(x,y) x ## y
# define __STRING(x) #x
# else /* defined(__STDC__) || defined(__cplusplus) */
# define __P(protos) ()
# define __CONCAT(x,y) x/**/y
# define __STRING(x) "x"
# define const
# define signed
# define volatile
# endif /* defined(__STDC__) || defined(__cplusplus) */
# endif /* !SM_CONF_SYS_CDEFS_H */
/*
** Define SM_DEAD, a macro used to declare functions that do not return
** to their caller.
*/
# ifndef SM_DEAD
# if __GNUC__ >= 2
# if __GNUC__ == 2 && __GNUC_MINOR__ < 5
# define SM_DEAD(proto) volatile proto
# else /* __GNUC__ == 2 && __GNUC_MINOR__ < 5 */
# define SM_DEAD(proto) proto __attribute__((__noreturn__))
# endif /* __GNUC__ == 2 && __GNUC_MINOR__ < 5 */
# else /* __GNUC__ >= 2 */
# define SM_DEAD(proto) proto
# endif /* __GNUC__ >= 2 */
# endif /* SM_DEAD */
/*
** Define SM_UNUSED, a macro used to declare variables that may be unused.
*/
# ifndef SM_UNUSED
# if __GNUC__ >= 2
# if __GNUC__ == 2 && __GNUC_MINOR__ < 7
# define SM_UNUSED(decl) decl
# else /* __GNUC__ == 2 && __GNUC_MINOR__ < 7 */
# define SM_UNUSED(decl) decl __attribute__((__unused__))
# endif /* __GNUC__ == 2 && __GNUC_MINOR__ < 7 */
# else /* __GNUC__ >= 2 */
# define SM_UNUSED(decl) decl
# endif /* __GNUC__ >= 2 */
# endif /* SM_UNUSED */
/*
** The SM_NONVOLATILE macro is used to declare variables that are not
** volatile, but which must be declared volatile when compiling with
** gcc -O -Wall in order to suppress bogus warning messages.
**
** Variables that actually are volatile should be declared volatile
** using the "volatile" keyword. If a variable actually is volatile,
** then SM_NONVOLATILE should not be used.
**
** To compile sendmail with gcc and see all non-bogus warnings,
** you should use
** gcc -O -Wall -DSM_OMIT_BOGUS_WARNINGS ...
** Do not use -DSM_OMIT_BOGUS_WARNINGS when compiling the production
** version of sendmail, because there is a performance hit.
*/
# ifdef SM_OMIT_BOGUS_WARNINGS
# define SM_NONVOLATILE volatile
# else /* SM_OMIT_BOGUS_WARNINGS */
# define SM_NONVOLATILE
# endif /* SM_OMIT_BOGUS_WARNINGS */
/*
** Turn on format string argument checking.
*/
# ifndef SM_CONF_FORMAT_TEST
# if __GNUC__ == 2 && __GNUC_MINOR__ >= 7
# define SM_CONF_FORMAT_TEST 1
# else /* __GNUC__ == 2 && __GNUC_MINOR__ >= 7 */
# define SM_CONF_FORMAT_TEST 0
# endif /* __GNUC__ == 2 && __GNUC_MINOR__ >= 7 */
# endif /* SM_CONF_FORMAT_TEST */
# ifndef PRINTFLIKE
# if SM_CONF_FORMAT_TEST
# define PRINTFLIKE(x,y) __attribute__ ((__format__ (__printf__, x, y)))
# else /* SM_CONF_FORMAT_TEST */
# define PRINTFLIKE(x,y)
# endif /* SM_CONF_FORMAT_TEST */
# endif /* ! PRINTFLIKE */
# ifndef SCANFLIKE
# if SM_CONF_FORMAT_TEST
# define SCANFLIKE(x,y) __attribute__ ((__format__ (__scanf__, x, y)))
# else /* SM_CONF_FORMAT_TEST */
# define SCANFLIKE(x,y)
# endif /* SM_CONF_FORMAT_TEST */
# endif /* ! SCANFLIKE */
#endif /* ! SM_CDEFS_H */
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