mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-21 01:12:32 +08:00
252 lines
7.7 KiB
C
252 lines
7.7 KiB
C
/* ANSI and traditional C compatability macros
|
|
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000
|
|
Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
/* ANSI and traditional C compatibility macros
|
|
|
|
ANSI C is assumed if __STDC__ is #defined.
|
|
|
|
Macro ANSI C definition Traditional C definition
|
|
----- ---- - ---------- ----------- - ----------
|
|
PTR `void *' `char *'
|
|
LONG_DOUBLE `long double' `double'
|
|
VOLATILE `volatile' `'
|
|
SIGNED `signed' `'
|
|
PTRCONST `void *const' `char *'
|
|
ANSI_PROTOTYPES 1 not defined
|
|
|
|
CONST is also defined, but is obsolete. Just use const.
|
|
|
|
obsolete -- DEFUN (name, arglist, args)
|
|
|
|
Defines function NAME.
|
|
|
|
ARGLIST lists the arguments, separated by commas and enclosed in
|
|
parentheses. ARGLIST becomes the argument list in traditional C.
|
|
|
|
ARGS list the arguments with their types. It becomes a prototype in
|
|
ANSI C, and the type declarations in traditional C. Arguments should
|
|
be separated with `AND'. For functions with a variable number of
|
|
arguments, the last thing listed should be `DOTS'.
|
|
|
|
obsolete -- DEFUN_VOID (name)
|
|
|
|
Defines a function NAME, which takes no arguments.
|
|
|
|
obsolete -- EXFUN (name, (prototype)) -- obsolete.
|
|
|
|
Replaced by PARAMS. Do not use; will disappear someday soon.
|
|
Was used in external function declarations.
|
|
In ANSI C it is `NAME PROTOTYPE' (so PROTOTYPE should be enclosed in
|
|
parentheses). In traditional C it is `NAME()'.
|
|
For a function that takes no arguments, PROTOTYPE should be `(void)'.
|
|
|
|
obsolete -- PROTO (type, name, (prototype) -- obsolete.
|
|
|
|
This one has also been replaced by PARAMS. Do not use.
|
|
|
|
PARAMS ((args))
|
|
|
|
We could use the EXFUN macro to handle prototype declarations, but
|
|
the name is misleading and the result is ugly. So we just define a
|
|
simple macro to handle the parameter lists, as in:
|
|
|
|
static int foo PARAMS ((int, char));
|
|
|
|
This produces: `static int foo();' or `static int foo (int, char);'
|
|
|
|
EXFUN would have done it like this:
|
|
|
|
static int EXFUN (foo, (int, char));
|
|
|
|
but the function is not external...and it's hard to visually parse
|
|
the function name out of the mess. EXFUN should be considered
|
|
obsolete; new code should be written to use PARAMS.
|
|
|
|
DOTS is also obsolete.
|
|
|
|
Examples:
|
|
|
|
extern int printf PARAMS ((const char *format, ...));
|
|
*/
|
|
|
|
#ifndef _ANSIDECL_H
|
|
|
|
#define _ANSIDECL_H 1
|
|
|
|
|
|
/* Every source file includes this file,
|
|
so they will all get the switch for lint. */
|
|
/* LINTLIBRARY */
|
|
|
|
|
|
#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(_WIN32)
|
|
/* All known AIX compilers implement these things (but don't always
|
|
define __STDC__). The RISC/OS MIPS compiler defines these things
|
|
in SVR4 mode, but does not define __STDC__. */
|
|
|
|
#define PTR void *
|
|
#define PTRCONST void *CONST
|
|
#define LONG_DOUBLE long double
|
|
|
|
#ifndef IN_GCC
|
|
#define AND ,
|
|
#define NOARGS void
|
|
#define VOLATILE volatile
|
|
#define SIGNED signed
|
|
#endif /* ! IN_GCC */
|
|
|
|
#define PARAMS(paramlist) paramlist
|
|
#define ANSI_PROTOTYPES 1
|
|
|
|
#define VPARAMS(ARGS) ARGS
|
|
#define VA_START(va_list,var) va_start(va_list,var)
|
|
|
|
/* These are obsolete. Do not use. */
|
|
#ifndef IN_GCC
|
|
#define CONST const
|
|
#define DOTS , ...
|
|
#define PROTO(type, name, arglist) type name arglist
|
|
#define EXFUN(name, proto) name proto
|
|
#define DEFUN(name, arglist, args) name(args)
|
|
#define DEFUN_VOID(name) name(void)
|
|
#endif /* ! IN_GCC */
|
|
|
|
#else /* Not ANSI C. */
|
|
|
|
#define PTR char *
|
|
#define PTRCONST PTR
|
|
#define LONG_DOUBLE double
|
|
|
|
#ifndef IN_GCC
|
|
#define AND ;
|
|
#define NOARGS
|
|
#define VOLATILE
|
|
#define SIGNED
|
|
#endif /* !IN_GCC */
|
|
|
|
#ifndef const /* some systems define it in header files for non-ansi mode */
|
|
#define const
|
|
#endif
|
|
|
|
#define PARAMS(paramlist) ()
|
|
|
|
#define VPARAMS(ARGS) (va_alist) va_dcl
|
|
#define VA_START(va_list,var) va_start(va_list)
|
|
|
|
/* These are obsolete. Do not use. */
|
|
#ifndef IN_GCC
|
|
#define CONST
|
|
#define DOTS
|
|
#define PROTO(type, name, arglist) type name ()
|
|
#define EXFUN(name, proto) name()
|
|
#define DEFUN(name, arglist, args) name arglist args;
|
|
#define DEFUN_VOID(name) name()
|
|
#endif /* ! IN_GCC */
|
|
|
|
#endif /* ANSI C. */
|
|
|
|
/* Using MACRO(x,y) in cpp #if conditionals does not work with some
|
|
older preprocessors. Thus we can't define something like this:
|
|
|
|
#define HAVE_GCC_VERSION(MAJOR, MINOR) \
|
|
(__GNUC__ > (MAJOR) || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ >= (MINOR)))
|
|
|
|
and then test "#if HAVE_GCC_VERSION(2,7)".
|
|
|
|
So instead we use the macro below and test it against specific values. */
|
|
|
|
/* This macro simplifies testing whether we are using gcc, and if it
|
|
is of a particular minimum version. (Both major & minor numbers are
|
|
significant.) This macro will evaluate to 0 if we are not using
|
|
gcc at all. */
|
|
#ifndef GCC_VERSION
|
|
#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
|
|
#endif /* GCC_VERSION */
|
|
|
|
/* Define macros for some gcc attributes. This permits us to use the
|
|
macros freely, and know that they will come into play for the
|
|
version of gcc in which they are supported. */
|
|
|
|
#if (GCC_VERSION < 2007)
|
|
# define __attribute__(x)
|
|
#endif
|
|
|
|
/* Attribute __malloc__ on functions was valid as of gcc 2.96. */
|
|
#ifndef ATTRIBUTE_MALLOC
|
|
# if (GCC_VERSION >= 2096)
|
|
# define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
|
|
# else
|
|
# define ATTRIBUTE_MALLOC
|
|
# endif /* GNUC >= 2.96 */
|
|
#endif /* ATTRIBUTE_MALLOC */
|
|
|
|
/* Attributes on labels were valid as of gcc 2.93. */
|
|
#ifndef ATTRIBUTE_UNUSED_LABEL
|
|
# if (GCC_VERSION >= 2093)
|
|
# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
|
|
# else
|
|
# define ATTRIBUTE_UNUSED_LABEL
|
|
# endif /* GNUC >= 2.93 */
|
|
#endif /* ATTRIBUTE_UNUSED_LABEL */
|
|
|
|
#ifndef ATTRIBUTE_UNUSED
|
|
#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
|
|
#endif /* ATTRIBUTE_UNUSED */
|
|
|
|
#ifndef ATTRIBUTE_NORETURN
|
|
#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
|
|
#endif /* ATTRIBUTE_NORETURN */
|
|
|
|
#ifndef ATTRIBUTE_PRINTF
|
|
#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
|
|
#define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2)
|
|
#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3)
|
|
#define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4)
|
|
#define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5)
|
|
#define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6)
|
|
#endif /* ATTRIBUTE_PRINTF */
|
|
|
|
/* We use __extension__ in some places to suppress -pedantic warnings
|
|
about GCC extensions. This feature didn't work properly before
|
|
gcc 2.8. */
|
|
#if GCC_VERSION < 2008
|
|
#define __extension__
|
|
#endif
|
|
|
|
/* Bootstrap support: Autoconf will possibly define the `inline' or
|
|
`const' keywords as macros, however this is only valid for the
|
|
stage1 compiler. If we detect a modern version of gcc,
|
|
unconditionally reset the values. This makes sure the right thing
|
|
happens in stage2 and later. We need to do this very early;
|
|
i.e. before any header files that might use these keywords.
|
|
Otherwise conflicts might occur. */
|
|
|
|
#if (GCC_VERSION >= 2007)
|
|
# ifdef __STDC__
|
|
# undef const
|
|
# endif
|
|
# undef inline
|
|
# define inline __inline__ /* __inline__ prevents -pedantic warnings */
|
|
# ifndef HAVE_LONG_DOUBLE
|
|
# define HAVE_LONG_DOUBLE 1
|
|
# endif
|
|
#endif /* GCC >= 2.7 */
|
|
|
|
#endif /* ansidecl.h */
|