main.c revision 146144 
1/*-
2 * Copyright (c) 1988, 1989, 1990, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 * Copyright (c) 1989 by Berkeley Softworks
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Adam de Boor.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)main.c      8.3 (Berkeley) 3/19/94
39 */
40
41#ifndef lint
42#if 0
43static char copyright[] =
44"@(#) Copyright (c) 1988, 1989, 1990, 1993\n\
45	The Regents of the University of California.  All rights reserved.\n";
46#endif
47#endif /* not lint */
48#include <sys/cdefs.h>
49__FBSDID("$FreeBSD: head/usr.bin/make/main.c 146144 2005-05-12 14:43:32Z harti $");
50
51/*
52 * main.c
53 *	The main file for this entire program. Exit routines etc
54 *	reside here.
55 *
56 * Utility functions defined in this file:
57 *	Main_ParseArgLine
58 *			Takes a line of arguments, breaks them and
59 *			treats them as if they were given when first
60 *			invoked. Used by the parse module to implement
61 *			the .MFLAGS target.
62 */
63
64#ifndef MACHINE
65#include <sys/utsname.h>
66#endif
67#include <sys/param.h>
68#include <sys/stat.h>
69#include <sys/sysctl.h>
70#include <sys/time.h>
71#include <sys/queue.h>
72#include <sys/resource.h>
73#include <sys/wait.h>
74#include <err.h>
75#include <errno.h>
76#include <stdlib.h>
77#include <string.h>
78#include <unistd.h>
79
80#include "arch.h"
81#include "buf.h"
82#include "config.h"
83#include "dir.h"
84#include "globals.h"
85#include "job.h"
86#include "make.h"
87#include "parse.h"
88#include "pathnames.h"
89#include "str.h"
90#include "suff.h"
91#include "targ.h"
92#include "util.h"
93#include "var.h"
94
95#define WANT_ENV_MKLVL	1
96#define	MKLVL_MAXVAL	500
97#define	MKLVL_ENVVAR	"__MKLVL__"
98
99#define	MAKEFLAGS	".MAKEFLAGS"
100
101extern char **environ;	/* XXX what header declares this variable? */
102
103/* Targets to be made */
104Lst create = Lst_Initializer(create);
105
106time_t		now;		/* Time at start of make */
107struct GNode	*DEFAULT;	/* .DEFAULT node */
108Boolean		allPrecious;	/* .PRECIOUS given on line by itself */
109uint32_t	warn_flags;	/* actual warning flags */
110uint32_t	warn_cmd;	/* command line warning flags */
111uint32_t	warn_nocmd;	/* command line no-warning flags */
112
113static Boolean	noBuiltins;	/* -r flag */
114
115/* ordered list of makefiles to read */
116static Lst makefiles = Lst_Initializer(makefiles);
117
118static Boolean	expandVars;	/* fully expand printed variables */
119
120/* list of variables to print */
121static Lst variables = Lst_Initializer(variables);
122
123static Boolean	forceJobs;      /* -j argument given */
124int		jobLimit;	/* -j argument: maximum number of jobs */
125Boolean		compatMake;	/* -B argument */
126Boolean		debug;		/* -d flag */
127Boolean		noExecute;	/* -n flag */
128Boolean		keepgoing;	/* -k flag */
129Boolean		queryFlag;	/* -q flag */
130Boolean		touchFlag;	/* -t flag */
131Boolean		usePipes;	/* !-P flag */
132Boolean		ignoreErrors;	/* -i flag */
133Boolean		beSilent;	/* -s flag */
134Boolean		beVerbose;	/* -v flag */
135
136/* (-E) vars to override from env */
137Lst envFirstVars = Lst_Initializer(envFirstVars);
138
139Boolean		jobsRunning;	/* TRUE if the jobs might be running */
140
141char		*chdir_verify_path(const char *, char *);
142
143static char	*curdir;	/* startup directory */
144static char	*objdir;	/* where we chdir'ed to */
145
146/**
147 * Exit with usage message.
148 */
149static void
150usage(void)
151{
152	fprintf(stderr,
153	    "usage: make [-BPSXeiknqrstv] [-C directory] [-D variable]\n"
154	    "\t[-d flags] [-E variable] [-f makefile] [-I directory]\n"
155	    "\t[-j max_jobs] [-m directory] [-V variable]\n"
156	    "\t[variable=value] [target ...]\n");
157	exit(2);
158}
159
160/**
161 * MFLAGS_append
162 *	Append a flag with an optional argument to MAKEFLAGS and MFLAGS
163 */
164static void
165MFLAGS_append(const char *flag, char *arg)
166{
167	char *str;
168
169	Var_Append(MAKEFLAGS, flag, VAR_GLOBAL);
170	if (arg != NULL) {
171		str = MAKEFLAGS_quote(arg);
172		Var_Append(MAKEFLAGS, str, VAR_GLOBAL);
173		free(str);
174	}
175
176	Var_Append("MFLAGS", flag, VAR_GLOBAL);
177	if (arg != NULL) {
178		str = MAKEFLAGS_quote(arg);
179		Var_Append("MFLAGS", str, VAR_GLOBAL);
180		free(str);
181	}
182}
183
184/**
185 * Main_ParseWarn
186 *
187 *	Handle argument to warning option.
188 */
189int
190Main_ParseWarn(const char *arg, int iscmd)
191{
192	int i, neg;
193
194	static const struct {
195		const char	*option;
196		uint32_t	flag;
197	} options[] = {
198		{ "dirsyntax",	WARN_DIRSYNTAX },
199		{ NULL,		0 }
200	};
201
202	neg = 0;
203	if (arg[0] == 'n' && arg[1] == 'o') {
204		neg = 1;
205		arg += 2;
206	}
207
208	for (i = 0; options[i].option != NULL; i++)
209		if (strcmp(arg, options[i].option) == 0)
210			break;
211
212	if (options[i].option == NULL)
213		/* unknown option */
214		return (-1);
215
216	if (iscmd) {
217		if (!neg) {
218			warn_cmd |= options[i].flag;
219			warn_nocmd &= ~options[i].flag;
220			warn_flags |= options[i].flag;
221		} else {
222			warn_nocmd |= options[i].flag;
223			warn_cmd &= ~options[i].flag;
224			warn_flags &= ~options[i].flag;
225		}
226	} else {
227		if (!neg) {
228			warn_flags |= (options[i].flag & ~warn_nocmd);
229		} else {
230			warn_flags &= ~(options[i].flag | warn_cmd);
231		}
232	}
233	return (0);
234}
235
236/**
237 * Open and parse the given makefile.
238 *
239 * Results:
240 *	TRUE if ok. FALSE if couldn't open file.
241 */
242static Boolean
243ReadMakefile(const char p[])
244{
245	char *fname;			/* makefile to read */
246	FILE *stream;
247	char *name, path[MAXPATHLEN];
248	char *MAKEFILE;
249	int setMAKEFILE;
250
251	/* XXX - remove this once constification is done */
252	fname = estrdup(p);
253
254	if (!strcmp(fname, "-")) {
255		Parse_File("(stdin)", stdin);
256		Var_Set("MAKEFILE", "", VAR_GLOBAL);
257	} else {
258		setMAKEFILE = strcmp(fname, ".depend");
259
260		/* if we've chdir'd, rebuild the path name */
261		if (curdir != objdir && *fname != '/') {
262			snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname);
263			/*
264			 * XXX The realpath stuff breaks relative includes
265			 * XXX in some cases.   The problem likely is in
266			 * XXX parse.c where it does special things in
267			 * XXX ParseDoInclude if the file is relateive
268			 * XXX or absolute and not a system file.  There
269			 * XXX it assumes that if the current file that's
270			 * XXX being included is absolute, that any files
271			 * XXX that it includes shouldn't do the -I path
272			 * XXX stuff, which is inconsistant with historical
273			 * XXX behavior.  However, I can't pentrate the mists
274			 * XXX further, so I'm putting this workaround in
275			 * XXX here until such time as the underlying bug
276			 * XXX can be fixed.
277			 */
278#if THIS_BREAKS_THINGS
279			if (realpath(path, path) != NULL &&
280			    (stream = fopen(path, "r")) != NULL) {
281				MAKEFILE = fname;
282				fname = path;
283				goto found;
284			}
285		} else if (realpath(fname, path) != NULL) {
286			MAKEFILE = fname;
287			fname = path;
288			if ((stream = fopen(fname, "r")) != NULL)
289				goto found;
290		}
291#else
292			if ((stream = fopen(path, "r")) != NULL) {
293				MAKEFILE = fname;
294				fname = path;
295				goto found;
296			}
297		} else {
298			MAKEFILE = fname;
299			if ((stream = fopen(fname, "r")) != NULL)
300				goto found;
301		}
302#endif
303		/* look in -I and system include directories. */
304		name = Path_FindFile(fname, &parseIncPath);
305		if (!name)
306			name = Path_FindFile(fname, &sysIncPath);
307		if (!name || !(stream = fopen(name, "r")))
308			return (FALSE);
309		MAKEFILE = fname = name;
310		/*
311		 * set the MAKEFILE variable desired by System V fans -- the
312		 * placement of the setting here means it gets set to the last
313		 * makefile specified, as it is set by SysV make.
314		 */
315found:
316		if (setMAKEFILE)
317			Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL);
318		Parse_File(fname, stream);
319		fclose(stream);
320	}
321	return (TRUE);
322}
323
324/**
325 * MainParseArgs
326 *	Parse a given argument vector. Called from main() and from
327 *	Main_ParseArgLine() when the .MAKEFLAGS target is used.
328 *
329 *	XXX: Deal with command line overriding .MAKEFLAGS in makefile
330 *
331 * Side Effects:
332 *	Various global and local flags will be set depending on the flags
333 *	given
334 */
335static void
336MainParseArgs(int argc, char **argv)
337{
338	int c;
339	Boolean	found_dd = FALSE;
340
341rearg:
342	optind = 1;	/* since we're called more than once */
343	optreset = 1;
344#define OPTFLAGS "ABC:D:E:I:PSV:Xd:ef:ij:km:nqrstvx:"
345	for (;;) {
346		if ((optind < argc) && strcmp(argv[optind], "--") == 0) {
347			found_dd = TRUE;
348		}
349		if ((c = getopt(argc, argv, OPTFLAGS)) == -1) {
350			break;
351		}
352		switch(c) {
353
354		case 'A':
355			arch_fatal = FALSE;
356			MFLAGS_append("-A", NULL);
357			break;
358		case 'C':
359			if (chdir(optarg) == -1)
360				err(1, "chdir %s", optarg);
361			break;
362		case 'D':
363			Var_Set(optarg, "1", VAR_GLOBAL);
364			MFLAGS_append("-D", optarg);
365			break;
366		case 'I':
367			Parse_AddIncludeDir(optarg);
368			MFLAGS_append("-I", optarg);
369			break;
370		case 'V':
371			Lst_AtEnd(&variables, estrdup(optarg));
372			MFLAGS_append("-V", optarg);
373			break;
374		case 'X':
375			expandVars = FALSE;
376			break;
377		case 'B':
378			compatMake = TRUE;
379			MFLAGS_append("-B", NULL);
380			unsetenv("MAKE_JOBS_FIFO");
381			break;
382		case 'P':
383			usePipes = FALSE;
384			MFLAGS_append("-P", NULL);
385			break;
386		case 'S':
387			keepgoing = FALSE;
388			MFLAGS_append("-S", NULL);
389			break;
390		case 'd': {
391			char *modules = optarg;
392
393			for (; *modules; ++modules)
394				switch (*modules) {
395				case 'A':
396					debug = ~0;
397					break;
398				case 'a':
399					debug |= DEBUG_ARCH;
400					break;
401				case 'c':
402					debug |= DEBUG_COND;
403					break;
404				case 'd':
405					debug |= DEBUG_DIR;
406					break;
407				case 'f':
408					debug |= DEBUG_FOR;
409					break;
410				case 'g':
411					if (modules[1] == '1') {
412						debug |= DEBUG_GRAPH1;
413						++modules;
414					}
415					else if (modules[1] == '2') {
416						debug |= DEBUG_GRAPH2;
417						++modules;
418					}
419					break;
420				case 'j':
421					debug |= DEBUG_JOB;
422					break;
423				case 'l':
424					debug |= DEBUG_LOUD;
425					break;
426				case 'm':
427					debug |= DEBUG_MAKE;
428					break;
429				case 's':
430					debug |= DEBUG_SUFF;
431					break;
432				case 't':
433					debug |= DEBUG_TARG;
434					break;
435				case 'v':
436					debug |= DEBUG_VAR;
437					break;
438				default:
439					warnx("illegal argument to d option "
440					    "-- %c", *modules);
441					usage();
442				}
443			MFLAGS_append("-d", optarg);
444			break;
445		}
446		case 'E':
447			Lst_AtEnd(&envFirstVars, estrdup(optarg));
448			MFLAGS_append("-E", optarg);
449			break;
450		case 'e':
451			checkEnvFirst = TRUE;
452			MFLAGS_append("-e", NULL);
453			break;
454		case 'f':
455			Lst_AtEnd(&makefiles, estrdup(optarg));
456			break;
457		case 'i':
458			ignoreErrors = TRUE;
459			MFLAGS_append("-i", NULL);
460			break;
461		case 'j': {
462			char *endptr;
463
464			forceJobs = TRUE;
465			jobLimit = strtol(optarg, &endptr, 10);
466			if (jobLimit <= 0 || *endptr != '\0') {
467				warnx("illegal number, -j argument -- %s",
468				    optarg);
469				usage();
470			}
471			MFLAGS_append("-j", optarg);
472			break;
473		}
474		case 'k':
475			keepgoing = TRUE;
476			MFLAGS_append("-k", NULL);
477			break;
478		case 'm':
479			Path_AddDir(&sysIncPath, optarg);
480			MFLAGS_append("-m", optarg);
481			break;
482		case 'n':
483			noExecute = TRUE;
484			MFLAGS_append("-n", NULL);
485			break;
486		case 'q':
487			queryFlag = TRUE;
488			/* Kind of nonsensical, wot? */
489			MFLAGS_append("-q", NULL);
490			break;
491		case 'r':
492			noBuiltins = TRUE;
493			MFLAGS_append("-r", NULL);
494			break;
495		case 's':
496			beSilent = TRUE;
497			MFLAGS_append("-s", NULL);
498			break;
499		case 't':
500			touchFlag = TRUE;
501			MFLAGS_append("-t", NULL);
502			break;
503		case 'v':
504			beVerbose = TRUE;
505			MFLAGS_append("-v", NULL);
506			break;
507		case 'x':
508			if (Main_ParseWarn(optarg, 1) != -1)
509				MFLAGS_append("-x", optarg);
510			break;
511
512		default:
513		case '?':
514			usage();
515		}
516	}
517	argv += optind;
518	argc -= optind;
519
520	oldVars = TRUE;
521
522	/*
523	 * Parse the rest of the arguments.
524	 *	o Check for variable assignments and perform them if so.
525	 *	o Check for more flags and restart getopt if so.
526	 *      o Anything else is taken to be a target and added
527	 *	  to the end of the "create" list.
528	 */
529	for (; *argv != NULL; ++argv, --argc) {
530		if (Parse_IsVar(*argv)) {
531			char *ptr = MAKEFLAGS_quote(*argv);
532
533			Var_Append(MAKEFLAGS, ptr, VAR_GLOBAL);
534			Parse_DoVar(*argv, VAR_CMD);
535			free(ptr);
536
537		} else if ((*argv)[0] == '-') {
538			if ((*argv)[1] == '\0') {
539				/*
540				 * (*argv) is a single dash, so we
541				 * just ignore it.
542				 */
543			} else if (found_dd) {
544				/*
545				 * Double dash has been found, ignore
546				 * any more options.  But what do we do
547				 * with it?  For now treat it like a target.
548				 */
549				Lst_AtEnd(&create, estrdup(*argv));
550			} else {
551				/*
552				 * (*argv) is a -flag, so backup argv and
553				 * argc.  getopt() expects options to start
554				 * in the 2nd position.
555				 */
556				argc++;
557				argv--;
558				goto rearg;
559			}
560
561		} else if ((*argv)[0] == '\0') {
562			Punt("illegal (null) argument.");
563
564		} else {
565			Lst_AtEnd(&create, estrdup(*argv));
566		}
567	}
568}
569
570/**
571 * Main_ParseArgLine
572 *  	Used by the parse module when a .MFLAGS or .MAKEFLAGS target
573 *	is encountered and by main() when reading the .MAKEFLAGS envariable.
574 *	Takes a line of arguments and breaks it into its
575 * 	component words and passes those words and the number of them to the
576 *	MainParseArgs function.
577 *	The line should have all its leading whitespace removed.
578 *
579 * Side Effects:
580 *	Only those that come from the various arguments.
581 */
582void
583Main_ParseArgLine(char *line, int mflags)
584{
585	char **argv;			/* Manufactured argument vector */
586	int argc;			/* Number of arguments in argv */
587
588	if (line == NULL)
589		return;
590	for (; *line == ' '; ++line)
591		continue;
592	if (!*line)
593		return;
594
595	if (mflags)
596		argv = MAKEFLAGS_break(line, &argc);
597	else
598		argv = brk_string(line, &argc, TRUE);
599
600	MainParseArgs(argc, argv);
601}
602
603char *
604chdir_verify_path(const char *path, char *obpath)
605{
606	struct stat sb;
607
608	if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
609		if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) {
610			warn("warning: %s", path);
611			return (NULL);
612		}
613		return (obpath);
614	}
615
616	return (NULL);
617}
618
619/**
620 * In lieu of a good way to prevent every possible looping in make(1), stop
621 * there from being more than MKLVL_MAXVAL processes forked by make(1), to
622 * prevent a forkbomb from happening, in a dumb and mechanical way.
623 *
624 * Side Effects:
625 *	Creates or modifies enviornment variable MKLVL_ENVVAR via setenv().
626 */
627static void
628check_make_level(void)
629{
630#ifdef WANT_ENV_MKLVL
631	char	*value = getenv(MKLVL_ENVVAR);
632	int	level = (value == NULL) ? 0 : atoi(value);
633
634	if (level < 0) {
635		errc(2, EAGAIN, "Invalid value for recursion level (%d).",
636		    level);
637	} else if (level > MKLVL_MAXVAL) {
638		errc(2, EAGAIN, "Max recursion level (%d) exceeded.",
639		    MKLVL_MAXVAL);
640	} else {
641		char new_value[32];
642		sprintf(new_value, "%d", level + 1);
643		setenv(MKLVL_ENVVAR, new_value, 1);
644	}
645#endif /* WANT_ENV_MKLVL */
646}
647
648/**
649 * main
650 *	The main function, for obvious reasons. Initializes variables
651 *	and a few modules, then parses the arguments give it in the
652 *	environment and on the command line. Reads the system makefile
653 *	followed by either Makefile, makefile or the file given by the
654 *	-f argument. Sets the .MAKEFLAGS PMake variable based on all the
655 *	flags it has received by then uses either the Make or the Compat
656 *	module to create the initial list of targets.
657 *
658 * Results:
659 *	If -q was given, exits -1 if anything was out-of-date. Else it exits
660 *	0.
661 *
662 * Side Effects:
663 *	The program exits when done. Targets are created. etc. etc. etc.
664 */
665int
666main(int argc, char **argv)
667{
668    	const char *machine;
669	const char *machine_arch;
670	const char *machine_cpu;
671	Boolean outOfDate = TRUE; 	/* FALSE if all targets up to date */
672	char *p, *p1, *pathp;
673	char *path;
674	char mdpath[MAXPATHLEN];
675	char obpath[MAXPATHLEN];
676	char cdpath[MAXPATHLEN];
677	char *cp = NULL, *start;
678
679	check_make_level();
680
681#ifdef RLIMIT_NOFILE
682	/*
683	 * get rid of resource limit on file descriptors
684	 */
685	{
686		struct rlimit rl;
687		if (getrlimit(RLIMIT_NOFILE, &rl) == -1) {
688			err(2, "getrlimit");
689		}
690		rl.rlim_cur = rl.rlim_max;
691		if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
692			err(2, "setrlimit");
693		}
694	}
695#endif
696
697	/*
698	 * PC-98 kernel sets the `i386' string to the utsname.machine and
699	 * it cannot be distinguished from IBM-PC by uname(3).  Therefore,
700	 * we check machine.ispc98 and adjust the machine variable before
701	 * using usname(3) below.
702	 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time,
703	 * __FreeBSD_version was defined as 300003. So, this check can
704	 * safely be done with any kernel with version > 300003.
705	 */
706	if (!machine) {
707		int	ispc98;
708		size_t	len;
709
710		len = sizeof(ispc98);
711		if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) {
712			if (ispc98)
713				machine = "pc98";
714		}
715	}
716
717	/*
718	 * Get the name of this type of MACHINE from utsname
719	 * so we can share an executable for similar machines.
720	 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
721	 *
722	 * Note that while MACHINE is decided at run-time,
723	 * MACHINE_ARCH is always known at compile time.
724	 */
725	if ((machine = getenv("MACHINE")) == NULL) {
726#ifdef MACHINE
727		machine = MACHINE;
728#else
729		static struct utsname utsname;
730
731		if (uname(&utsname) == -1)
732			err(2, "uname");
733		machine = utsname.machine;
734#endif
735	}
736
737	if ((machine_arch = getenv("MACHINE_ARCH")) == NULL) {
738#ifdef MACHINE_ARCH
739		machine_arch = MACHINE_ARCH;
740#else
741		machine_arch = "unknown";
742#endif
743	}
744
745	/*
746	 * Set machine_cpu to the minumum supported CPU revision based
747	 * on the target architecture, if not already set.
748	 */
749	if ((machine_cpu = getenv("MACHINE_CPU")) == NULL) {
750		if (!strcmp(machine_arch, "i386"))
751			machine_cpu = "i386";
752		else if (!strcmp(machine_arch, "alpha"))
753			machine_cpu = "ev4";
754		else
755			machine_cpu = "unknown";
756	}
757
758	expandVars = TRUE;
759	beSilent = FALSE;		/* Print commands as executed */
760	ignoreErrors = FALSE;		/* Pay attention to non-zero returns */
761	noExecute = FALSE;		/* Execute all commands */
762	keepgoing = FALSE;		/* Stop on error */
763	allPrecious = FALSE;		/* Remove targets when interrupted */
764	queryFlag = FALSE;		/* This is not just a check-run */
765	noBuiltins = FALSE;		/* Read the built-in rules */
766	touchFlag = FALSE;		/* Actually update targets */
767	usePipes = TRUE;		/* Catch child output in pipes */
768	debug = 0;			/* No debug verbosity, please. */
769	jobsRunning = FALSE;
770
771	jobLimit = DEFMAXJOBS;
772	forceJobs = FALSE;              /* No -j flag */
773	compatMake = FALSE;		/* No compat mode */
774
775	/*
776	 * Initialize the parsing, directory and variable modules to prepare
777	 * for the reading of inclusion paths and variable settings on the
778	 * command line
779	 */
780	Proc_Init();
781
782	Dir_Init();		/* Initialize directory structures so -I flags
783				 * can be processed correctly */
784	Var_Init(environ);	/* As well as the lists of variables for
785				 * parsing arguments */
786        str_init();
787
788	/*
789	 * Initialize various variables.
790	 *	MAKE also gets this name, for compatibility
791	 *	.MAKEFLAGS gets set to the empty string just in case.
792	 *	MFLAGS also gets initialized empty, for compatibility.
793	 */
794	Var_Set("MAKE", argv[0], VAR_GLOBAL);
795	Var_Set(MAKEFLAGS, "", VAR_GLOBAL);
796	Var_Set("MFLAGS", "", VAR_GLOBAL);
797	Var_Set("MACHINE", machine, VAR_GLOBAL);
798	Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL);
799	Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL);
800#ifdef MAKE_VERSION
801	Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL);
802#endif
803
804	/*
805	 * First snag things out of the MAKEFLAGS environment
806	 * variable.  Then parse the command line arguments.
807	 */
808	Main_ParseArgLine(getenv("MAKEFLAGS"), 1);
809
810	MainParseArgs(argc, argv);
811
812	/*
813	 * Find where we are...
814	 */
815	curdir = cdpath;
816	if (getcwd(curdir, MAXPATHLEN) == NULL)
817		err(2, NULL);
818
819	{
820	struct stat sa;
821
822	if (stat(curdir, &sa) == -1)
823	    err(2, "%s", curdir);
824	}
825
826	/*
827	 * The object directory location is determined using the
828	 * following order of preference:
829	 *
830	 *	1. MAKEOBJDIRPREFIX`cwd`
831	 *	2. MAKEOBJDIR
832	 *	3. PATH_OBJDIR.${MACHINE}
833	 *	4. PATH_OBJDIR
834	 *	5. PATH_OBJDIRPREFIX`cwd`
835	 *
836	 * If one of the first two fails, use the current directory.
837	 * If the remaining three all fail, use the current directory.
838	 *
839	 * Once things are initted,
840	 * have to add the original directory to the search path,
841	 * and modify the paths for the Makefiles apropriately.  The
842	 * current directory is also placed as a variable for make scripts.
843	 */
844	if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) {
845		if (!(path = getenv("MAKEOBJDIR"))) {
846			path = PATH_OBJDIR;
847			pathp = PATH_OBJDIRPREFIX;
848			snprintf(mdpath, MAXPATHLEN, "%s.%s",
849					path, machine);
850			if (!(objdir = chdir_verify_path(mdpath, obpath)))
851				if (!(objdir=chdir_verify_path(path, obpath))) {
852					snprintf(mdpath, MAXPATHLEN,
853							"%s%s", pathp, curdir);
854					if (!(objdir=chdir_verify_path(mdpath,
855								       obpath)))
856						objdir = curdir;
857				}
858		}
859		else if (!(objdir = chdir_verify_path(path, obpath)))
860			objdir = curdir;
861	}
862	else {
863		snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir);
864		if (!(objdir = chdir_verify_path(mdpath, obpath)))
865			objdir = curdir;
866	}
867	Dir_InitDot();		/* Initialize the "." directory */
868	if (objdir != curdir)
869		Path_AddDir(&dirSearchPath, curdir);
870	Var_Set(".ST_EXPORTVAR", "YES", VAR_GLOBAL);
871	Var_Set(".CURDIR", curdir, VAR_GLOBAL);
872	Var_Set(".OBJDIR", objdir, VAR_GLOBAL);
873
874	if (getenv("MAKE_JOBS_FIFO") != NULL)
875		forceJobs = TRUE;
876	/*
877	 * Be compatible if user did not specify -j and did not explicitly
878	 * turned compatibility on
879	 */
880	if (!compatMake && !forceJobs)
881		compatMake = TRUE;
882
883	/*
884	 * Initialize target and suffix modules in preparation for
885	 * parsing the makefile(s)
886	 */
887	Targ_Init();
888	Suff_Init();
889
890	DEFAULT = NULL;
891	time(&now);
892
893	/*
894	 * Set up the .TARGETS variable to contain the list of targets to be
895	 * created. If none specified, make the variable empty -- the parser
896	 * will fill the thing in with the default or .MAIN target.
897	 */
898	if (!Lst_IsEmpty(&create)) {
899		LstNode *ln;
900
901		for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) {
902			char *name = Lst_Datum(ln);
903
904			Var_Append(".TARGETS", name, VAR_GLOBAL);
905		}
906	} else
907		Var_Set(".TARGETS", "", VAR_GLOBAL);
908
909
910	/*
911	 * If no user-supplied system path was given (through the -m option)
912	 * add the directories from the DEFSYSPATH (more than one may be given
913	 * as dir1:...:dirn) to the system include path.
914	 */
915	if (TAILQ_EMPTY(&sysIncPath)) {
916		char syspath[] = PATH_DEFSYSPATH;
917
918		for (start = syspath; *start != '\0'; start = cp) {
919			for (cp = start; *cp != '\0' && *cp != ':'; cp++)
920				continue;
921			if (*cp == '\0') {
922				Path_AddDir(&sysIncPath, start);
923			} else {
924				*cp++ = '\0';
925				Path_AddDir(&sysIncPath, start);
926			}
927		}
928	}
929
930	/*
931	 * Read in the built-in rules first, followed by the specified
932	 * makefile, if it was (makefile != (char *) NULL), or the default
933	 * Makefile and makefile, in that order, if it wasn't.
934	 */
935	if (!noBuiltins) {
936		/* Path of sys.mk */
937		Lst sysMkPath = Lst_Initializer(sysMkPath);
938		LstNode *ln;
939		char	defsysmk[] = PATH_DEFSYSMK;
940
941		Path_Expand(defsysmk, &sysIncPath, &sysMkPath);
942		if (Lst_IsEmpty(&sysMkPath))
943			Fatal("make: no system rules (%s).", PATH_DEFSYSMK);
944		LST_FOREACH(ln, &sysMkPath) {
945			if (!ReadMakefile(Lst_Datum(ln)))
946				break;
947		}
948		if (ln != NULL)
949			Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
950		Lst_Destroy(&sysMkPath, free);
951	}
952
953	if (!Lst_IsEmpty(&makefiles)) {
954		LstNode *ln;
955
956		LST_FOREACH(ln, &makefiles) {
957			if (!ReadMakefile(Lst_Datum(ln)))
958				break;
959		}
960		if (ln != NULL)
961			Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
962	} else if (!ReadMakefile("BSDmakefile"))
963	    if (!ReadMakefile("makefile"))
964		ReadMakefile("Makefile");
965
966	ReadMakefile(".depend");
967
968	/* Install all the flags into the MAKE envariable. */
969	if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p)
970		setenv("MAKEFLAGS", p, 1);
971	free(p1);
972
973	/*
974	 * For compatibility, look at the directories in the VPATH variable
975	 * and add them to the search path, if the variable is defined. The
976	 * variable's value is in the same format as the PATH envariable, i.e.
977	 * <directory>:<directory>:<directory>...
978	 */
979	if (Var_Exists("VPATH", VAR_CMD)) {
980		/*
981		 * GCC stores string constants in read-only memory, but
982		 * Var_Subst will want to write this thing, so store it
983		 * in an array
984		 */
985		static char VPATH[] = "${VPATH}";
986		Buffer	*buf;
987		char	*vpath;
988		char	*ptr;
989		char	savec;
990
991		buf = Var_Subst(VPATH, VAR_CMD, FALSE);
992
993		vpath = Buf_Data(buf);
994		do {
995			/* skip to end of directory */
996			for (ptr = vpath; *ptr != ':' && *ptr != '\0'; ptr++)
997				;
998
999			/* Save terminator character so know when to stop */
1000			savec = *ptr;
1001			*ptr = '\0';
1002
1003			/* Add directory to search path */
1004			Path_AddDir(&dirSearchPath, vpath);
1005
1006			vpath = ptr + 1;
1007		} while (savec != '\0');
1008
1009		Buf_Destroy(buf, TRUE);
1010	}
1011
1012	/*
1013	 * Now that all search paths have been read for suffixes et al, it's
1014	 * time to add the default search path to their lists...
1015	 */
1016	Suff_DoPaths();
1017
1018	/* print the initial graph, if the user requested it */
1019	if (DEBUG(GRAPH1))
1020		Targ_PrintGraph(1);
1021
1022	/* print the values of any variables requested by the user */
1023	if (Lst_IsEmpty(&variables)) {
1024		/*
1025		 * Since the user has not requested that any variables
1026		 * be printed, we can build targets.
1027		 *
1028		 * Have read the entire graph and need to make a list of targets
1029		 * to create. If none was given on the command line, we consult
1030		 * the parsing module to find the main target(s) to create.
1031		 */
1032		Lst targs = Lst_Initializer(targs);
1033
1034		if (Lst_IsEmpty(&create))
1035			Parse_MainName(&targs);
1036		else
1037			Targ_FindList(&targs, &create, TARG_CREATE);
1038
1039		if (compatMake) {
1040			/*
1041			 * Compat_Init will take care of creating
1042			 * all the targets as well as initializing
1043			 * the module.
1044			 */
1045			Compat_Run(&targs);
1046			outOfDate = 0;
1047		} else {
1048			/*
1049			 * Initialize job module before traversing
1050			 * the graph, now that any .BEGIN and .END
1051			 * targets have been read.  This is done
1052			 * only if the -q flag wasn't given (to
1053			 * prevent the .BEGIN from being executed
1054			 * should it exist).
1055			 */
1056			if (!queryFlag) {
1057				Job_Init(jobLimit);
1058				jobsRunning = TRUE;
1059			}
1060
1061			/* Traverse the graph, checking on all the targets */
1062			outOfDate = Make_Run(&targs);
1063		}
1064		Lst_Destroy(&targs, NOFREE);
1065
1066	} else {
1067		Var_Print(&variables, expandVars);
1068	}
1069
1070	Lst_Destroy(&variables, free);
1071	Lst_Destroy(&makefiles, free);
1072	Lst_Destroy(&create, free);
1073
1074	/* print the graph now it's been processed if the user requested it */
1075	if (DEBUG(GRAPH2))
1076		Targ_PrintGraph(2);
1077
1078	if (queryFlag && outOfDate)
1079		return (1);
1080	else
1081		return (0);
1082}
1083
1084