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Up to [local] / src / usr.bin / make

changes to get target equivalence to work better.
- add new file to create lists of equivalent targets (siblings)
- use that for sequential mode to have much better VPATH support
- separate checking commands from reporting error, for later.
- zap DieHorribly accordingly
- renumber existing flags
- signal_running_jobs() is simpler than pass_signal_to_jobs()
- new debug option -dn for name matching.

Similar code to handle parallel make is still missing.

thanks to Mark, Miod, Theo, Otto, Todd for tests and/or comments.

#ifndef ERROR_H
#define ERROR_H
/*	$OpenPackages$ */
/*	$OpenBSD: error.h,v 1.9 2008/11/04 07:22:35 espie Exp $ */

/*
 * Copyright (c) 2001 Marc Espie.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT 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 OPENBSD
 * PROJECT 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.
 */
/*	Error			Print a tagged error message. The global
 *				MAKE variable must have been defined. This
 *				takes a format string and two optional
 *				arguments for it.
 *
 *	Fatal			Print an error message and exit. Also takes
 *				a format string and two arguments.
 *
 *	Punt			Aborts all jobs and exits with a message. Also
 *				takes a format string and two arguments.
 *
 *	Finish			Finish things up by printing the number of
 *				errors which occurred, as passed to it, and
 *				exiting.
 */
extern void Error(char *, ...);
extern void Fatal(char *, ...);
extern void Punt(char *, ...);
extern void Finish(int);

/*
 * Error levels for parsing. PARSE_FATAL means the process cannot continue
 * once the makefile has been parsed. PARSE_WARNING means it can. Passed
 * as the first argument to Parse_Error.
 */
#define PARSE_WARNING	2
#define PARSE_FATAL	1
extern void Parse_Error(int, const char *, ...);
extern int fatal_errors;
/* Needed for fatal errors: we have to know whether we must abort other jobs
 * or not */
extern bool supervise_jobs;
#endif