Remove unused and largely-broken-anyway compatibility defs.

src/include/regex/cdefs.h

-/*
- * ++Copyright++ 1991, 1993
- * -
- * Copyright (c) 1991, 1993
- *	  The Regents of the University of California.	All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *	  notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *	  notice, this list of conditions and the following disclaimer in the
- *	  documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *	  must display the following acknowledgement:
- *		This product includes software developed by the University of
- *		California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- *	  may be used to endorse or promote products derived from this software
- *	  without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.	IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * -
- * Portions Copyright (c) 1993 by Digital Equipment Corporation.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies, and that
- * the name of Digital Equipment Corporation not be used in advertising or
- * publicity pertaining to distribution of the document or software without
- * specific, written prior permission.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
- * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS.	 IN NO EVENT SHALL DIGITAL EQUIPMENT
- * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- * -
- * --Copyright
- */
-
-/*
- *		@(#)cdefs.h		8.1 (Berkeley) 6/2/93
- *		$Id: cdefs.h,v 1.5 1999/02/13 23:21:58 momjian Exp $
- */
-
-#ifndef _CDEFS_H_
-#define _CDEFS_H_
-
-#if defined(__cplusplus)
-#define __BEGIN_DECLS	extern "C" {
-#define __END_DECLS		};
-#else
-#define __BEGIN_DECLS
-#define __END_DECLS
-#endif
-
-/*
- * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
- * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
- * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
- * in between its arguments.  __CONCAT can also concatenate double-quoted
- * strings produced by the __STRING macro, but this only works with ANSI C.
- */
-#if defined(__STDC__) || defined(__cplusplus)
-/*
- * Some headers in the Linux C library define __P the same as here,
- * but with different argument variable name.  This causes a compiler
- * warning!  So we avoid the redefinition.
- */
-#if !defined(__P)
-#define __P(protos)		protos	/* full-blown ANSI C */
-#endif
-#define __CONCAT(x,y)	x ## y
-#define __STRING(x)		#x
-
-#define __const			const	/* define reserved names to standard */
-#define __signed		signed
-#define __volatile		volatile
-#if defined(__cplusplus)
-#define __inline		inline	/* convert to C++ keyword */
-#else
-#ifndef __GNUC__
-#define __inline				/* delete GCC keyword */
-#endif	 /* !__GNUC__ */
-#endif	 /* !__cplusplus */
-
-#else							/* !(__STDC__ || __cplusplus) */
-#define __P(protos)		()		/* traditional C preprocessor */
-#define __CONCAT(x,y)	x/**/y
-#define __STRING(x)		"x"
-
-#ifndef __GNUC__
-#define __const					/* delete pseudo-ANSI C keywords */
-#define __inline
-#define __signed
-#define __volatile
-/*
- * In non-ANSI C environments, new programs will want ANSI-only C keywords
- * deleted from the program and old programs will want them left alone.
- * When using a compiler other than gcc, programs using the ANSI C keywords
- * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
- * When using "gcc -traditional", we assume that this is the intent; if
- * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
- */
-#ifndef NO_ANSI_KEYWORDS
-#define const					/* delete ANSI C keywords */
-#define inline
-#define signed
-#define volatile
-#endif
-#endif	 /* !__GNUC__ */
-#endif	 /* !(__STDC__ || __cplusplus) */
-
-/*
- * GCC1 and some versions of GCC2 declare dead (non-returning) and
- * pure (no side effects) functions using "volatile" and "const";
- * unfortunately, these then cause warnings under "-ansi -pedantic".
- * GCC2 uses a new, peculiar __attribute__((attrs)) style.	All of
- * these work for GNU C++ (modulo a slight glitch in the C++ grammar
- * in the distribution version of 2.5.5).
- */
-#if !defined(__GNUC__) || __GNUC__ < 2 || __GNUC_MINOR__ < 5
-#define __attribute__(x)		/* delete __attribute__ if non-gcc or gcc1 */
-#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
-#define __dead			__volatile
-#define __pure			__const
-#endif
-#endif
-
-/* Delete pseudo-keywords wherever they are not available or needed. */
-#ifndef __dead
-#define __dead
-#define __pure
-#endif
-
-#endif	 /* !_CDEFS_H_ */