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Synch with my current work.
Numerous changes:
- generate can build several tables
- style cleanup
- statistics code
- use variable names throughout (struct Name)
- recursive variables everywhere
- faster parser (pass buffer along instead of allocating multiple copies)
- correct parser. Handles comments everywhere, and ; correctly
- more string intervals
- simplified dir.c, less recursion.
- extended for loops
- sinclude()
- finished removing extra junk from Lst_*
- handles ${@D} and friends in a simpler way
- cleaned up and modular VarModifiers handling.
- recognizes some gnu Makefile usages and errors out about them.

Additionally, some extra functionality is defined by FEATURES. The set of
functionalities is currently hardcoded to OpenBSD defaults, but this may
include support for some NetBSD extensions, like ODE modifiers.

Backed by miod@ and millert@, who finally got sick of my endless patches...

/*	$OpenPackages$ */
/*	$OpenBSD: config.h,v 1.10 2001/05/03 13:41:03 espie Exp $	*/
/*	$NetBSD: config.h,v 1.7 1996/11/06 17:59:03 christos Exp $	*/

/*
 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
 * Copyright (c) 1988, 1989 by Adam de Boor
 * Copyright (c) 1989 by Berkeley Softworks
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Adam de Boor.
 *
 * 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.
 *
 *	from: @(#)config.h	8.1 (Berkeley) 6/6/93
 */

#define DEFSHELL	1			/* Bourne shell */

/*
 * DEFMAXJOBS
 * DEFMAXLOCAL
 *	These control the default concurrency. On no occasion will more
 *	than DEFMAXJOBS targets be created at once (locally or remotely)
 *	DEFMAXLOCAL is the highest number of targets which will be
 *	created on the local machine at once. Note that if you set this
 *	to 0, nothing will ever happen...
 */
#define DEFMAXJOBS	4
#define DEFMAXLOCAL	1

/*
 * INCLUDES
 * LIBRARIES
 *	These control the handling of the .INCLUDES and .LIBS variables.
 *	If INCLUDES is defined, the .INCLUDES variable will be filled
 *	from the search paths of those suffixes which are marked by
 *	.INCLUDES dependency lines. Similarly for LIBRARIES and .LIBS
 *	See suff.c for more details.
 */
#define INCLUDES
#define LIBRARIES

/*
 * LIBSUFF
 *	Is the suffix used to denote libraries and is used by the Suff module
 *	to find the search path on which to seek any -l<xx> targets.
 *
 * RECHECK
 *	If defined, Make_Update will check a target for its current
 *	modification time after it has been re-made, setting it to the
 *	starting time of the make only if the target still doesn't exist.
 *	Unfortunately, under NFS the modification time often doesn't
 *	get updated in time, so a target will appear to not have been
 *	re-made, causing later targets to appear up-to-date. On systems
 *	that don't have this problem, you should defined this. Under
 *	NFS you probably should not, unless you aren't exporting jobs.
 */
#define LIBSUFF ".a"
#define RECHECK

/*
 * SYSVINCLUDE
 *	Recognize system V like include directives [include "filename"]
 * SYSVVARSUB
 *	Recognize system V like ${VAR:x=y} variable substitutions
 */
#define SYSVINCLUDE
#define SYSVVARSUB

/*
 * SUNSHCMD
 *	Recognize SunOS and Solaris:
 *		VAR :sh= CMD	# Assign VAR to the command substitution of CMD
 *		${VAR:sh}	# Return the command substitution of the value
 *				# of ${VAR}
 */
#define SUNSHCMD

#if !defined(__svr4__) && !defined(__SVR4) && !defined(__alpha__) && \
    !defined(__mips__) && !defined(__powerpc__)
# ifndef RANLIBMAG
#  define RANLIBMAG "__.SYMDEF"
# endif
#endif

#ifdef SYSVINCLUDE
#define DOFEATURE_SYSVINCLUDE	FEATURE_SYSVINCLUDE
#else
#define DOFEATURE_SYSVINCLUDE	0
#endif
#ifdef SYSVVARSUB
#define DOFEATURE_SYSVVARSUB	FEATURE_SYSVVARSUB
#else
#define DOFEATURE_SYSVVARSUB	0
#endif
#ifdef SUNSHCMD
#define DOFEATURE_SUNSHCMD	FEATURE_SUNSHCMD
#else
#define DOFEATURE_SUNSHCMD	0
#endif

#ifndef DEFAULT_FEATURES
#define DEFAULT_FEATURES	(FEATURE_UPPERLOWER | DOFEATURE_SYSVVARSUB | DOFEATURE_SYSVINCLUDE | DOFEATURE_SUNSHCMD | FEATURE_RECVARS)
#endif

#define FEATURES(x)	((DEFAULT_FEATURES & (x)) != 0)
#define FEATURE_ODE		1
#define FEATURE_UNIQ		2
#define FEATURE_SORT		4
#define FEATURE_UPPERLOWER	8
#define FEATURE_SYSVVARSUB	16
#define FEATURE_SYSVINCLUDE	32
#define FEATURE_SUNSHCMD	64
#define FEATURE_RECVARS		128
#define FEATURE_CONDINCLUDE	256
#define FEATURE_ASSIGN		512
#define FEATURE_EXECMOD		1024