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
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
38 * @(#) Copyright (c) 1988, 1989, 1990, 1993 The Regents of the University of California. All rights reserved.
39 * @(#)main.c 8.3 (Berkeley) 3/19/94
40 * $FreeBSD: src/usr.bin/make/main.c,v 1.118 2005/02/13 13:33:56 harti Exp $
41 * $DragonFly: src/usr.bin/make/main.c,v 1.80 2005/04/24 12:39:45 okumoto Exp $
46 * The main file for this entire program. Exit routines etc
49 * Utility functions defined in this file:
51 * Takes a line of arguments, breaks them and
52 * treats them as if they were given when first
53 * invoked. Used by the parse module to implement
58 #include <sys/utsname.h>
60 #include <sys/param.h>
63 #include <sys/queue.h>
64 #include <sys/resource.h>
81 #include "pathnames.h"
88 #define WANT_ENV_MKLVL 1
89 #define MKLVL_MAXVAL 500
90 #define MKLVL_ENVVAR "__MKLVL__"
92 #define MAKEFLAGS ".MAKEFLAGS"
94 extern char **environ; /* XXX what header declares this variable? */
96 /* Targets to be made */
97 Lst create = Lst_Initializer(create);
99 time_t now; /* Time at start of make */
100 struct GNode *DEFAULT; /* .DEFAULT node */
101 Boolean allPrecious; /* .PRECIOUS given on line by itself */
103 static Boolean noBuiltins; /* -r flag */
105 /* ordered list of makefiles to read */
106 static Lst makefiles = Lst_Initializer(makefiles);
108 static Boolean expandVars; /* fully expand printed variables */
110 /* list of variables to print */
111 static Lst variables = Lst_Initializer(variables);
113 int maxJobs; /* -j argument */
114 static Boolean forceJobs; /* -j argument given */
115 Boolean compatMake; /* -B argument */
116 Boolean debug; /* -d flag */
117 Boolean noExecute; /* -n flag */
118 Boolean keepgoing; /* -k flag */
119 Boolean queryFlag; /* -q flag */
120 Boolean touchFlag; /* -t flag */
121 Boolean usePipes; /* !-P flag */
122 Boolean ignoreErrors; /* -i flag */
123 Boolean beSilent; /* -s flag */
124 Boolean beVerbose; /* -v flag */
125 Boolean oldVars; /* variable substitution style */
126 Boolean checkEnvFirst; /* -e flag */
128 /* (-E) vars to override from env */
129 Lst envFirstVars = Lst_Initializer(envFirstVars);
131 Boolean jobsRunning; /* TRUE if the jobs might be running */
133 char *chdir_verify_path(const char *, char *);
134 static int ReadMakefile(const char *);
135 static void usage(void);
137 static char *curdir; /* startup directory */
138 static char *objdir; /* where we chdir'ed to */
142 * Append a flag with an optional argument to MAKEFLAGS and MFLAGS
145 MFLAGS_append(const char *flag, char *arg)
149 Var_Append(MAKEFLAGS, flag, VAR_GLOBAL);
151 str = MAKEFLAGS_quote(arg);
152 Var_Append(MAKEFLAGS, str, VAR_GLOBAL);
156 Var_Append("MFLAGS", flag, VAR_GLOBAL);
158 str = MAKEFLAGS_quote(arg);
159 Var_Append("MFLAGS", str, VAR_GLOBAL);
166 * Parse a given argument vector. Called from main() and from
167 * Main_ParseArgLine() when the .MAKEFLAGS target is used.
169 * XXX: Deal with command line overriding .MAKEFLAGS in makefile
172 * Various global and local flags will be set depending on the flags
176 MainParseArgs(int argc, char **argv)
179 Boolean found_dd = FALSE;
182 optind = 1; /* since we're called more than once */
184 #define OPTFLAGS "ABC:D:E:I:PSV:Xd:ef:ij:km:nqrstv"
186 if ((optind < argc) && strcmp(argv[optind], "--") == 0) {
189 if ((c = getopt(argc, argv, OPTFLAGS)) == -1) {
196 MFLAGS_append("-A", NULL);
199 if (chdir(optarg) == -1)
200 err(1, "chdir %s", optarg);
203 Var_Set(optarg, "1", VAR_GLOBAL);
204 MFLAGS_append("-D", optarg);
207 Parse_AddIncludeDir(optarg);
208 MFLAGS_append("-I", optarg);
211 Lst_AtEnd(&variables, estrdup(optarg));
212 MFLAGS_append("-V", optarg);
219 MFLAGS_append("-B", NULL);
220 unsetenv("MAKE_JOBS_FIFO");
224 MFLAGS_append("-P", NULL);
228 MFLAGS_append("-S", NULL);
231 char *modules = optarg;
233 for (; *modules; ++modules)
251 if (modules[1] == '1') {
252 debug |= DEBUG_GRAPH1;
255 else if (modules[1] == '2') {
256 debug |= DEBUG_GRAPH2;
279 warnx("illegal argument to d option "
283 MFLAGS_append("-d", optarg);
287 Lst_AtEnd(&envFirstVars, estrdup(optarg));
288 MFLAGS_append("-E", optarg);
291 checkEnvFirst = TRUE;
292 MFLAGS_append("-e", NULL);
295 Lst_AtEnd(&makefiles, estrdup(optarg));
299 MFLAGS_append("-i", NULL);
305 maxJobs = strtol(optarg, &endptr, 10);
306 if (maxJobs <= 0 || *endptr != '\0') {
307 warnx("illegal number, -j argument -- %s",
311 MFLAGS_append("-j", optarg);
316 MFLAGS_append("-k", NULL);
319 Path_AddDir(&sysIncPath, optarg);
320 MFLAGS_append("-m", optarg);
324 MFLAGS_append("-n", NULL);
328 /* Kind of nonsensical, wot? */
329 MFLAGS_append("-q", NULL);
333 MFLAGS_append("-r", NULL);
337 MFLAGS_append("-s", NULL);
341 MFLAGS_append("-t", NULL);
345 MFLAGS_append("-v", NULL);
358 * Parse the rest of the arguments.
359 * o Check for variable assignments and perform them if so.
360 * o Check for more flags and restart getopt if so.
361 * o Anything else is taken to be a target and added
362 * to the end of the "create" list.
364 for (; *argv != NULL; ++argv, --argc) {
365 if (Parse_IsVar(*argv)) {
366 char *ptr = MAKEFLAGS_quote(*argv);
368 Var_Append(MAKEFLAGS, ptr, VAR_GLOBAL);
369 Parse_DoVar(*argv, VAR_CMD);
372 } else if ((*argv)[0] == '-') {
373 if ((*argv)[1] == '\0') {
375 * (*argv) is a single dash, so we
378 } else if (found_dd) {
380 * Double dash has been found, ignore
381 * any more options. But what do we do
382 * with it? For now treat it like a target.
384 Lst_AtEnd(&create, estrdup(*argv));
387 * (*argv) is a -flag, so backup argv and
388 * argc. getopt() expects options to start
389 * in the 2nd position.
396 } else if ((*argv)[0] == '\0') {
397 Punt("illegal (null) argument.");
400 Lst_AtEnd(&create, estrdup(*argv));
407 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target
408 * is encountered and by main() when reading the .MAKEFLAGS envariable.
409 * Takes a line of arguments and breaks it into its
410 * component words and passes those words and the number of them to the
411 * MainParseArgs function.
412 * The line should have all its leading whitespace removed.
415 * Only those that come from the various arguments.
418 Main_ParseArgLine(char *line, int mflags)
420 char **argv; /* Manufactured argument vector */
421 int argc; /* Number of arguments in argv */
425 for (; *line == ' '; ++line)
431 argv = MAKEFLAGS_break(line, &argc);
433 argv = brk_string(line, &argc, TRUE);
435 MainParseArgs(argc, argv);
439 chdir_verify_path(const char *path, char *obpath)
443 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
444 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) {
445 warn("warning: %s", path);
455 catch_child(int sig __unused)
460 * In lieu of a good way to prevent every possible looping in
461 * make(1), stop there from being more than MKLVL_MAXVAL processes forked
462 * by make(1), to prevent a forkbomb from happening, in a dumb and
466 check_make_level(void)
468 #ifdef WANT_ENV_MKLVL
469 char *value = getenv(MKLVL_ENVVAR);
470 int level = (value == NULL) ? 0 : atoi(value);
473 errc(2, EAGAIN, "Invalid value for recursion level (%d).",
475 } else if (level > MKLVL_MAXVAL) {
476 errc(2, EAGAIN, "Max recursion level (%d) exceeded.",
480 sprintf(new_value, "%d", level + 1);
481 setenv(MKLVL_ENVVAR, new_value, 1);
483 #endif /* WANT_ENV_MKLVL */
488 * The main function, for obvious reasons. Initializes variables
489 * and a few modules, then parses the arguments give it in the
490 * environment and on the command line. Reads the system makefile
491 * followed by either Makefile, makefile or the file given by the
492 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the
493 * flags it has received by then uses either the Make or the Compat
494 * module to create the initial list of targets.
497 * If -q was given, exits -1 if anything was out-of-date. Else it exits
501 * The program exits when done. Targets are created. etc. etc. etc.
504 main(int argc, char **argv)
506 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */
510 char mdpath[MAXPATHLEN];
511 char obpath[MAXPATHLEN];
512 char cdpath[MAXPATHLEN];
513 const char *machine = getenv("MACHINE");
514 const char *machine_arch = getenv("MACHINE_ARCH");
515 const char *machine_cpu = getenv("MACHINE_CPU");
516 char *cp = NULL, *start;
518 /* avoid faults on read-only strings */
519 static char syspath[] = PATH_DEFSYSPATH;
523 * Catch SIGCHLD so that we get kicked out of select() when we
524 * need to look at a child. This is only known to matter for the
525 * -j case (perhaps without -P).
527 * XXX this is intentionally misplaced.
531 sigemptyset(&sa.sa_mask);
532 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
533 sa.sa_handler = catch_child;
534 sigaction(SIGCHLD, &sa, NULL);
541 * Turn off ENV to make ksh happier.
548 * get rid of resource limit on file descriptors
552 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
553 rl.rlim_cur != rl.rlim_max) {
554 rl.rlim_cur = rl.rlim_max;
555 setrlimit(RLIMIT_NOFILE, &rl);
560 * Get the name of this type of MACHINE from utsname
561 * so we can share an executable for similar machines.
562 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
564 * Note that while MACHINE is decided at run-time,
565 * MACHINE_ARCH is always known at compile time.
569 static struct utsname utsname;
571 if (uname(&utsname) == -1)
573 machine = utsname.machine;
581 machine_arch = "unknown";
583 machine_arch = MACHINE_ARCH;
588 * Set machine_cpu to the minumum supported CPU revision based
589 * on the target architecture, if not already set.
592 if (!strcmp(machine_arch, "i386"))
593 machine_cpu = "i386";
594 else if (!strcmp(machine_arch, "alpha"))
597 machine_cpu = "unknown";
601 beSilent = FALSE; /* Print commands as executed */
602 ignoreErrors = FALSE; /* Pay attention to non-zero returns */
603 noExecute = FALSE; /* Execute all commands */
604 keepgoing = FALSE; /* Stop on error */
605 allPrecious = FALSE; /* Remove targets when interrupted */
606 queryFlag = FALSE; /* This is not just a check-run */
607 noBuiltins = FALSE; /* Read the built-in rules */
608 touchFlag = FALSE; /* Actually update targets */
609 usePipes = TRUE; /* Catch child output in pipes */
610 debug = 0; /* No debug verbosity, please. */
613 maxJobs = DEFMAXJOBS;
614 forceJobs = FALSE; /* No -j flag */
615 compatMake = FALSE; /* No compat mode */
618 * Initialize the parsing, directory and variable modules to prepare
619 * for the reading of inclusion paths and variable settings on the
622 Dir_Init(); /* Initialize directory structures so -I flags
623 * can be processed correctly */
624 Var_Init(environ); /* As well as the lists of variables for
625 * parsing arguments */
629 * Initialize various variables.
630 * MAKE also gets this name, for compatibility
631 * .MAKEFLAGS gets set to the empty string just in case.
632 * MFLAGS also gets initialized empty, for compatibility.
634 Var_Set("MAKE", argv[0], VAR_GLOBAL);
635 Var_Set(MAKEFLAGS, "", VAR_GLOBAL);
636 Var_Set("MFLAGS", "", VAR_GLOBAL);
637 Var_Set("MACHINE", machine, VAR_GLOBAL);
638 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL);
639 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL);
641 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL);
645 * First snag things out of the MAKEFLAGS environment
646 * variable. Then parse the command line arguments.
648 Main_ParseArgLine(getenv("MAKEFLAGS"), 1);
650 MainParseArgs(argc, argv);
653 * Find where we are...
656 if (getcwd(curdir, MAXPATHLEN) == NULL)
662 if (stat(curdir, &sa) == -1)
663 err(2, "%s", curdir);
667 * The object directory location is determined using the
668 * following order of preference:
670 * 1. MAKEOBJDIRPREFIX`cwd`
672 * 3. PATH_OBJDIR.${MACHINE}
674 * 5. PATH_OBJDIRPREFIX`cwd`
676 * If one of the first two fails, use the current directory.
677 * If the remaining three all fail, use the current directory.
679 * Once things are initted,
680 * have to add the original directory to the search path,
681 * and modify the paths for the Makefiles apropriately. The
682 * current directory is also placed as a variable for make scripts.
684 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) {
685 if (!(path = getenv("MAKEOBJDIR"))) {
687 pathp = PATH_OBJDIRPREFIX;
688 snprintf(mdpath, MAXPATHLEN, "%s.%s",
690 if (!(objdir = chdir_verify_path(mdpath, obpath)))
691 if (!(objdir=chdir_verify_path(path, obpath))) {
692 snprintf(mdpath, MAXPATHLEN,
693 "%s%s", pathp, curdir);
694 if (!(objdir=chdir_verify_path(mdpath,
699 else if (!(objdir = chdir_verify_path(path, obpath)))
703 snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir);
704 if (!(objdir = chdir_verify_path(mdpath, obpath)))
707 Dir_InitDot(); /* Initialize the "." directory */
708 if (objdir != curdir)
709 Path_AddDir(&dirSearchPath, curdir);
710 Var_Set(".DIRECTIVE_MAKEENV", "YES", VAR_GLOBAL);
711 Var_Set(".ST_EXPORTVAR", "YES", VAR_GLOBAL);
712 Var_Set(".CURDIR", curdir, VAR_GLOBAL);
713 Var_Set(".OBJDIR", objdir, VAR_GLOBAL);
715 if (getenv("MAKE_JOBS_FIFO") != NULL)
718 * Be compatible if user did not specify -j and did not explicitly
719 * turned compatibility on
721 if (!compatMake && !forceJobs)
725 * Initialize target and suffix modules in preparation for
726 * parsing the makefile(s)
735 * Set up the .TARGETS variable to contain the list of targets to be
736 * created. If none specified, make the variable empty -- the parser
737 * will fill the thing in with the default or .MAIN target.
739 if (!Lst_IsEmpty(&create)) {
742 for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) {
743 char *name = Lst_Datum(ln);
745 Var_Append(".TARGETS", name, VAR_GLOBAL);
748 Var_Set(".TARGETS", "", VAR_GLOBAL);
752 * If no user-supplied system path was given (through the -m option)
753 * add the directories from the DEFSYSPATH (more than one may be given
754 * as dir1:...:dirn) to the system include path.
756 if (TAILQ_EMPTY(&sysIncPath)) {
757 for (start = syspath; *start != '\0'; start = cp) {
758 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
761 Path_AddDir(&sysIncPath, start);
764 Path_AddDir(&sysIncPath, start);
770 * Read in the built-in rules first, followed by the specified
771 * makefile, if it was (makefile != (char *) NULL), or the default
772 * Makefile and makefile, in that order, if it wasn't.
776 Lst sysMkPath = Lst_Initializer(sysMkPath);
778 char defsysmk[] = PATH_DEFSYSMK;
780 Path_Expand(defsysmk, &sysIncPath, &sysMkPath);
781 if (Lst_IsEmpty(&sysMkPath))
782 Fatal("make: no system rules (%s).", PATH_DEFSYSMK);
783 LST_FOREACH(ln, &sysMkPath) {
784 if (!ReadMakefile(Lst_Datum(ln)))
788 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
789 Lst_Destroy(&sysMkPath, free);
792 if (!Lst_IsEmpty(&makefiles)) {
795 LST_FOREACH(ln, &makefiles) {
796 if (!ReadMakefile(Lst_Datum(ln)))
800 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
801 } else if (!ReadMakefile("BSDmakefile"))
802 if (!ReadMakefile("makefile"))
803 ReadMakefile("Makefile");
805 ReadMakefile(".depend");
807 /* Install all the flags into the MAKE envariable. */
808 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p)
809 setenv("MAKEFLAGS", p, 1);
813 * For compatibility, look at the directories in the VPATH variable
814 * and add them to the search path, if the variable is defined. The
815 * variable's value is in the same format as the PATH envariable, i.e.
816 * <directory>:<directory>:<directory>...
818 if (Var_Exists("VPATH", VAR_CMD)) {
820 * GCC stores string constants in read-only memory, but
821 * Var_Subst will want to write this thing, so store it
824 static char VPATH[] = "${VPATH}";
830 buf = Var_Subst(VPATH, VAR_CMD, FALSE);
832 vpath = Buf_Data(buf);
834 /* skip to end of directory */
835 for (ptr = vpath; *ptr != ':' && *ptr != '\0'; ptr++)
838 /* Save terminator character so know when to stop */
842 /* Add directory to search path */
843 Path_AddDir(&dirSearchPath, vpath);
846 } while (savec != '\0');
848 Buf_Destroy(buf, TRUE);
852 * Now that all search paths have been read for suffixes et al, it's
853 * time to add the default search path to their lists...
857 /* print the initial graph, if the user requested it */
861 /* print the values of any variables requested by the user */
862 if (Lst_IsEmpty(&variables)) {
864 * Since the user has not requested that any variables
865 * be printed, we can build targets.
867 * Have read the entire graph and need to make a list of targets
868 * to create. If none was given on the command line, we consult
869 * the parsing module to find the main target(s) to create.
871 Lst targs = Lst_Initializer(targs);
873 if (Lst_IsEmpty(&create))
874 Parse_MainName(&targs);
876 Targ_FindList(&targs, &create, TARG_CREATE);
880 * Compat_Init will take care of creating
881 * all the targets as well as initializing
888 * Initialize job module before traversing
889 * the graph, now that any .BEGIN and .END
890 * targets have been read. This is done
891 * only if the -q flag wasn't given (to
892 * prevent the .BEGIN from being executed
900 /* Traverse the graph, checking on all the targets */
901 outOfDate = Make_Run(&targs);
903 Lst_Destroy(&targs, NOFREE);
907 * Print the values of any variables requested by
912 LST_FOREACH(n, &variables) {
913 const char *name = Lst_Datum(n);
918 v = emalloc(strlen(name) + 1 + 3);
919 sprintf(v, "${%s}", name);
921 value = Buf_Peel(Var_Subst(v,
923 printf("%s\n", value);
930 value = Var_Value(name, VAR_GLOBAL, &v);
931 printf("%s\n", value != NULL ? value : "");
938 Lst_Destroy(&variables, free);
939 Lst_Destroy(&makefiles, free);
940 Lst_Destroy(&create, free);
942 /* print the graph now it's been processed if the user requested it */
946 if (queryFlag && outOfDate)
954 * Open and parse the given makefile.
957 * TRUE if ok. FALSE if couldn't open file.
963 ReadMakefile(const char *p)
965 char *fname; /* makefile to read */
967 char *name, path[MAXPATHLEN];
971 /* XXX - remove this once constification is done */
974 if (!strcmp(fname, "-")) {
975 Parse_File("(stdin)", stdin);
976 Var_Set("MAKEFILE", "", VAR_GLOBAL);
978 setMAKEFILE = strcmp(fname, ".depend");
980 /* if we've chdir'd, rebuild the path name */
981 if (curdir != objdir && *fname != '/') {
982 snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname);
984 * XXX The realpath stuff breaks relative includes
985 * XXX in some cases. The problem likely is in
986 * XXX parse.c where it does special things in
987 * XXX ParseDoInclude if the file is relateive
988 * XXX or absolute and not a system file. There
989 * XXX it assumes that if the current file that's
990 * XXX being included is absolute, that any files
991 * XXX that it includes shouldn't do the -I path
992 * XXX stuff, which is inconsistant with historical
993 * XXX behavior. However, I can't pentrate the mists
994 * XXX further, so I'm putting this workaround in
995 * XXX here until such time as the underlying bug
998 #if THIS_BREAKS_THINGS
999 if (realpath(path, path) != NULL &&
1000 (stream = fopen(path, "r")) != NULL) {
1005 } else if (realpath(fname, path) != NULL) {
1008 if ((stream = fopen(fname, "r")) != NULL)
1012 if ((stream = fopen(path, "r")) != NULL) {
1019 if ((stream = fopen(fname, "r")) != NULL)
1023 /* look in -I and system include directories. */
1024 name = Path_FindFile(fname, &parseIncPath);
1026 name = Path_FindFile(fname, &sysIncPath);
1027 if (!name || !(stream = fopen(name, "r")))
1029 MAKEFILE = fname = name;
1031 * set the MAKEFILE variable desired by System V fans -- the
1032 * placement of the setting here means it gets set to the last
1033 * makefile specified, as it is set by SysV make.
1037 Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL);
1038 Parse_File(fname, stream);
1046 * exit with usage message
1051 fprintf(stderr, "%s\n%s\n%s\n",
1052 "usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]",
1053 " [-E variable] [-f makefile] [-I directory] [-j max_jobs]",
1054 " [-m directory] [-V variable] [variable=value] [target ...]");