/* * 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 1.15.2.1 2003/12/05 22:44:17 ca Exp $ */ #pragma ident "%Z%%M% %I% %E% SMI" /* ** libsm C language portability macros ** See libsm/cdefs.html for documentation. */ #ifndef SM_CDEFS_H # define SM_CDEFS_H # include /* ** BSD and Linux have 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 # endif /* SM_CONF_SYS_CDEFS_H */ /* ** Define the standard C language portability macros ** for platforms that lack . */ # 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 # define SM_DEAD_D volatile # else /* __GNUC__ == 2 && __GNUC_MINOR__ < 5 */ # define SM_DEAD(proto) proto __attribute__((__noreturn__)) # define SM_DEAD_D # endif /* __GNUC__ == 2 && __GNUC_MINOR__ < 5 */ # else /* __GNUC__ >= 2 */ # define SM_DEAD(proto) proto # define SM_DEAD_D # 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 */