main.c revision 160442
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 160442 2006-07-17 19:16:12Z obrien $"); 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#include <sys/param.h> 65#include <sys/stat.h> 66#include <sys/sysctl.h> 67#include <sys/time.h> 68#include <sys/queue.h> 69#include <sys/resource.h> 70#include <sys/utsname.h> 71#include <sys/wait.h> 72#include <err.h> 73#include <errno.h> 74#include <stdlib.h> 75#include <string.h> 76#include <unistd.h> 77 78#include "arch.h" 79#include "buf.h" 80#include "config.h" 81#include "dir.h" 82#include "globals.h" 83#include "job.h" 84#include "make.h" 85#include "parse.h" 86#include "pathnames.h" 87#include "shell.h" 88#include "str.h" 89#include "suff.h" 90#include "targ.h" 91#include "util.h" 92#include "var.h" 93 94extern char **environ; /* XXX what header declares this variable? */ 95 96#define WANT_ENV_MKLVL 1 97#define MKLVL_MAXVAL 500 98#define MKLVL_ENVVAR "__MKLVL__" 99 100/* ordered list of makefiles to read */ 101static Lst makefiles = Lst_Initializer(makefiles); 102 103/* list of variables to print */ 104static Lst variables = Lst_Initializer(variables); 105 106static Boolean expandVars; /* fully expand printed variables */ 107static Boolean noBuiltins; /* -r flag */ 108static Boolean forceJobs; /* -j argument given */ 109static char *curdir; /* startup directory */ 110static char *objdir; /* where we chdir'ed to */ 111 112/* (-E) vars to override from env */ 113Lst envFirstVars = Lst_Initializer(envFirstVars); 114 115/* Targets to be made */ 116Lst create = Lst_Initializer(create); 117 118Boolean allPrecious; /* .PRECIOUS given on line by itself */ 119Boolean beSilent; /* -s flag */ 120Boolean beVerbose; /* -v flag */ 121Boolean compatMake; /* -B argument */ 122int debug; /* -d flag */ 123Boolean ignoreErrors; /* -i flag */ 124int jobLimit; /* -j argument */ 125Boolean jobsRunning; /* TRUE if the jobs might be running */ 126Boolean keepgoing; /* -k flag */ 127Boolean noExecute; /* -n flag */ 128Boolean queryFlag; /* -q flag */ 129Boolean touchFlag; /* -t flag */ 130Boolean usePipes; /* !-P flag */ 131uint32_t warn_cmd; /* command line warning flags */ 132uint32_t warn_flags; /* actual warning flags */ 133uint32_t warn_nocmd; /* command line no-warning flags */ 134 135time_t now; /* Time at start of make */ 136struct GNode *DEFAULT; /* .DEFAULT node */ 137 138/** 139 * Exit with usage message. 140 */ 141static void 142usage(void) 143{ 144 fprintf(stderr, 145 "usage: make [-BPSXeiknqrstv] [-C directory] [-D variable]\n" 146 "\t[-d flags] [-E variable] [-f makefile] [-I directory]\n" 147 "\t[-j max_jobs] [-m directory] [-V variable]\n" 148 "\t[variable=value] [target ...]\n"); 149 exit(2); 150} 151 152/** 153 * MFLAGS_append 154 * Append a flag with an optional argument to MAKEFLAGS and MFLAGS 155 */ 156static void 157MFLAGS_append(const char *flag, char *arg) 158{ 159 char *str; 160 161 Var_Append(".MAKEFLAGS", flag, VAR_GLOBAL); 162 if (arg != NULL) { 163 str = MAKEFLAGS_quote(arg); 164 Var_Append(".MAKEFLAGS", str, VAR_GLOBAL); 165 free(str); 166 } 167 168 Var_Append("MFLAGS", flag, VAR_GLOBAL); 169 if (arg != NULL) { 170 str = MAKEFLAGS_quote(arg); 171 Var_Append("MFLAGS", str, VAR_GLOBAL); 172 free(str); 173 } 174} 175 176/** 177 * Main_ParseWarn 178 * 179 * Handle argument to warning option. 180 */ 181int 182Main_ParseWarn(const char *arg, int iscmd) 183{ 184 int i, neg; 185 186 static const struct { 187 const char *option; 188 uint32_t flag; 189 } options[] = { 190 { "dirsyntax", WARN_DIRSYNTAX }, 191 { NULL, 0 } 192 }; 193 194 neg = 0; 195 if (arg[0] == 'n' && arg[1] == 'o') { 196 neg = 1; 197 arg += 2; 198 } 199 200 for (i = 0; options[i].option != NULL; i++) 201 if (strcmp(arg, options[i].option) == 0) 202 break; 203 204 if (options[i].option == NULL) 205 /* unknown option */ 206 return (-1); 207 208 if (iscmd) { 209 if (!neg) { 210 warn_cmd |= options[i].flag; 211 warn_nocmd &= ~options[i].flag; 212 warn_flags |= options[i].flag; 213 } else { 214 warn_nocmd |= options[i].flag; 215 warn_cmd &= ~options[i].flag; 216 warn_flags &= ~options[i].flag; 217 } 218 } else { 219 if (!neg) { 220 warn_flags |= (options[i].flag & ~warn_nocmd); 221 } else { 222 warn_flags &= ~(options[i].flag | warn_cmd); 223 } 224 } 225 return (0); 226} 227 228/** 229 * Open and parse the given makefile. 230 * 231 * Results: 232 * TRUE if ok. FALSE if couldn't open file. 233 */ 234static Boolean 235ReadMakefile(const char p[]) 236{ 237 char *fname, *fnamesave; /* makefile to read */ 238 FILE *stream; 239 char *name, path[MAXPATHLEN]; 240 char *MAKEFILE; 241 int setMAKEFILE; 242 243 /* XXX - remove this once constification is done */ 244 fnamesave = fname = estrdup(p); 245 246 if (!strcmp(fname, "-")) { 247 Parse_File("(stdin)", stdin); 248 Var_SetGlobal("MAKEFILE", ""); 249 } else { 250 setMAKEFILE = strcmp(fname, ".depend"); 251 252 /* if we've chdir'd, rebuild the path name */ 253 if (curdir != objdir && *fname != '/') { 254 snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 255 /* 256 * XXX The realpath stuff breaks relative includes 257 * XXX in some cases. The problem likely is in 258 * XXX parse.c where it does special things in 259 * XXX ParseDoInclude if the file is relateive 260 * XXX or absolute and not a system file. There 261 * XXX it assumes that if the current file that's 262 * XXX being included is absolute, that any files 263 * XXX that it includes shouldn't do the -I path 264 * XXX stuff, which is inconsistant with historical 265 * XXX behavior. However, I can't pentrate the mists 266 * XXX further, so I'm putting this workaround in 267 * XXX here until such time as the underlying bug 268 * XXX can be fixed. 269 */ 270#if THIS_BREAKS_THINGS 271 if (realpath(path, path) != NULL && 272 (stream = fopen(path, "r")) != NULL) { 273 MAKEFILE = fname; 274 fname = path; 275 goto found; 276 } 277 } else if (realpath(fname, path) != NULL) { 278 MAKEFILE = fname; 279 fname = path; 280 if ((stream = fopen(fname, "r")) != NULL) 281 goto found; 282 } 283#else 284 if ((stream = fopen(path, "r")) != NULL) { 285 MAKEFILE = fname; 286 fname = path; 287 goto found; 288 } 289 } else { 290 MAKEFILE = fname; 291 if ((stream = fopen(fname, "r")) != NULL) 292 goto found; 293 } 294#endif 295 /* look in -I and system include directories. */ 296 name = Path_FindFile(fname, &parseIncPath); 297 if (!name) 298 name = Path_FindFile(fname, &sysIncPath); 299 if (!name || !(stream = fopen(name, "r"))) { 300 free(fnamesave); 301 return (FALSE); 302 } 303 MAKEFILE = fname = name; 304 /* 305 * set the MAKEFILE variable desired by System V fans -- the 306 * placement of the setting here means it gets set to the last 307 * makefile specified, as it is set by SysV make. 308 */ 309found: 310 if (setMAKEFILE) 311 Var_SetGlobal("MAKEFILE", MAKEFILE); 312 Parse_File(fname, stream); 313 } 314 free(fnamesave); 315 return (TRUE); 316} 317 318/** 319 * MainParseArgs 320 * Parse a given argument vector. Called from main() and from 321 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 322 * 323 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 324 * 325 * Side Effects: 326 * Various global and local flags will be set depending on the flags 327 * given 328 */ 329static void 330MainParseArgs(int argc, char **argv) 331{ 332 int c; 333 Boolean found_dd = FALSE; 334 335rearg: 336 optind = 1; /* since we're called more than once */ 337 optreset = 1; 338#define OPTFLAGS "ABC:D:E:I:PSV:Xd:ef:ij:km:nqrstvx:" 339 for (;;) { 340 if ((optind < argc) && strcmp(argv[optind], "--") == 0) { 341 found_dd = TRUE; 342 } 343 if ((c = getopt(argc, argv, OPTFLAGS)) == -1) { 344 break; 345 } 346 switch(c) { 347 348 case 'A': 349 arch_fatal = FALSE; 350 MFLAGS_append("-A", NULL); 351 break; 352 case 'C': 353 if (chdir(optarg) == -1) 354 err(1, "chdir %s", optarg); 355 break; 356 case 'D': 357 Var_SetGlobal(optarg, "1"); 358 MFLAGS_append("-D", optarg); 359 break; 360 case 'I': 361 Parse_AddIncludeDir(optarg); 362 MFLAGS_append("-I", optarg); 363 break; 364 case 'V': 365 Lst_AtEnd(&variables, estrdup(optarg)); 366 MFLAGS_append("-V", optarg); 367 break; 368 case 'X': 369 expandVars = FALSE; 370 break; 371 case 'B': 372 compatMake = TRUE; 373 MFLAGS_append("-B", NULL); 374 unsetenv("MAKE_JOBS_FIFO"); 375 break; 376 case 'P': 377 usePipes = FALSE; 378 MFLAGS_append("-P", NULL); 379 break; 380 case 'S': 381 keepgoing = FALSE; 382 MFLAGS_append("-S", NULL); 383 break; 384 case 'd': { 385 char *modules = optarg; 386 387 for (; *modules; ++modules) 388 switch (*modules) { 389 case 'A': 390 debug = ~0; 391 break; 392 case 'a': 393 debug |= DEBUG_ARCH; 394 break; 395 case 'c': 396 debug |= DEBUG_COND; 397 break; 398 case 'd': 399 debug |= DEBUG_DIR; 400 break; 401 case 'f': 402 debug |= DEBUG_FOR; 403 break; 404 case 'g': 405 if (modules[1] == '1') { 406 debug |= DEBUG_GRAPH1; 407 ++modules; 408 } 409 else if (modules[1] == '2') { 410 debug |= DEBUG_GRAPH2; 411 ++modules; 412 } 413 break; 414 case 'j': 415 debug |= DEBUG_JOB; 416 break; 417 case 'l': 418 debug |= DEBUG_LOUD; 419 break; 420 case 'm': 421 debug |= DEBUG_MAKE; 422 break; 423 case 's': 424 debug |= DEBUG_SUFF; 425 break; 426 case 't': 427 debug |= DEBUG_TARG; 428 break; 429 case 'v': 430 debug |= DEBUG_VAR; 431 break; 432 default: 433 warnx("illegal argument to d option " 434 "-- %c", *modules); 435 usage(); 436 } 437 MFLAGS_append("-d", optarg); 438 break; 439 } 440 case 'E': 441 Lst_AtEnd(&envFirstVars, estrdup(optarg)); 442 MFLAGS_append("-E", optarg); 443 break; 444 case 'e': 445 checkEnvFirst = TRUE; 446 MFLAGS_append("-e", NULL); 447 break; 448 case 'f': 449 Lst_AtEnd(&makefiles, estrdup(optarg)); 450 break; 451 case 'i': 452 ignoreErrors = TRUE; 453 MFLAGS_append("-i", NULL); 454 break; 455 case 'j': { 456 char *endptr; 457 458 forceJobs = TRUE; 459 jobLimit = strtol(optarg, &endptr, 10); 460 if (jobLimit <= 0 || *endptr != '\0') { 461 warnx("illegal number, -j argument -- %s", 462 optarg); 463 usage(); 464 } 465 MFLAGS_append("-j", optarg); 466 break; 467 } 468 case 'k': 469 keepgoing = TRUE; 470 MFLAGS_append("-k", NULL); 471 break; 472 case 'm': 473 Path_AddDir(&sysIncPath, optarg); 474 MFLAGS_append("-m", optarg); 475 break; 476 case 'n': 477 noExecute = TRUE; 478 MFLAGS_append("-n", NULL); 479 break; 480 case 'q': 481 queryFlag = TRUE; 482 /* Kind of nonsensical, wot? */ 483 MFLAGS_append("-q", NULL); 484 break; 485 case 'r': 486 noBuiltins = TRUE; 487 MFLAGS_append("-r", NULL); 488 break; 489 case 's': 490 beSilent = TRUE; 491 MFLAGS_append("-s", NULL); 492 break; 493 case 't': 494 touchFlag = TRUE; 495 MFLAGS_append("-t", NULL); 496 break; 497 case 'v': 498 beVerbose = TRUE; 499 MFLAGS_append("-v", NULL); 500 break; 501 case 'x': 502 if (Main_ParseWarn(optarg, 1) != -1) 503 MFLAGS_append("-x", optarg); 504 break; 505 506 default: 507 case '?': 508 usage(); 509 } 510 } 511 argv += optind; 512 argc -= optind; 513 514 oldVars = TRUE; 515 516 /* 517 * Parse the rest of the arguments. 518 * o Check for variable assignments and perform them if so. 519 * o Check for more flags and restart getopt if so. 520 * o Anything else is taken to be a target and added 521 * to the end of the "create" list. 522 */ 523 for (; *argv != NULL; ++argv, --argc) { 524 if (Parse_IsVar(*argv)) { 525 char *ptr = MAKEFLAGS_quote(*argv); 526 527 Var_Append(".MAKEFLAGS", ptr, VAR_GLOBAL); 528 Parse_DoVar(*argv, VAR_CMD); 529 free(ptr); 530 531 } else if ((*argv)[0] == '-') { 532 if ((*argv)[1] == '\0') { 533 /* 534 * (*argv) is a single dash, so we 535 * just ignore it. 536 */ 537 } else if (found_dd) { 538 /* 539 * Double dash has been found, ignore 540 * any more options. But what do we do 541 * with it? For now treat it like a target. 542 */ 543 Lst_AtEnd(&create, estrdup(*argv)); 544 } else { 545 /* 546 * (*argv) is a -flag, so backup argv and 547 * argc. getopt() expects options to start 548 * in the 2nd position. 549 */ 550 argc++; 551 argv--; 552 goto rearg; 553 } 554 555 } else if ((*argv)[0] == '\0') { 556 Punt("illegal (null) argument."); 557 558 } else { 559 Lst_AtEnd(&create, estrdup(*argv)); 560 } 561 } 562} 563 564/** 565 * Main_ParseArgLine 566 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 567 * is encountered and by main() when reading the .MAKEFLAGS envariable. 568 * Takes a line of arguments and breaks it into its 569 * component words and passes those words and the number of them to the 570 * MainParseArgs function. 571 * The line should have all its leading whitespace removed. 572 * 573 * Side Effects: 574 * Only those that come from the various arguments. 575 */ 576void 577Main_ParseArgLine(char *line, int mflags) 578{ 579 ArgArray aa; 580 581 if (line == NULL) 582 return; 583 for (; *line == ' '; ++line) 584 continue; 585 if (!*line) 586 return; 587 588 if (mflags) 589 MAKEFLAGS_break(&aa, line); 590 else 591 brk_string(&aa, line, TRUE); 592 593 MainParseArgs(aa.argc, aa.argv); 594 ArgArray_Done(&aa); 595} 596 597static char * 598chdir_verify_path(const char *path, char *obpath) 599{ 600 struct stat sb; 601 602 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 603 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 604 warn("warning: %s", path); 605 return (NULL); 606 } 607 return (obpath); 608 } 609 610 return (NULL); 611} 612 613/** 614 * In lieu of a good way to prevent every possible looping in make(1), stop 615 * there from being more than MKLVL_MAXVAL processes forked by make(1), to 616 * prevent a forkbomb from happening, in a dumb and mechanical way. 617 * 618 * Side Effects: 619 * Creates or modifies enviornment variable MKLVL_ENVVAR via setenv(). 620 */ 621static void 622check_make_level(void) 623{ 624#ifdef WANT_ENV_MKLVL 625 char *value = getenv(MKLVL_ENVVAR); 626 int level = (value == NULL) ? 0 : atoi(value); 627 628 if (level < 0) { 629 errc(2, EAGAIN, "Invalid value for recursion level (%d).", 630 level); 631 } else if (level > MKLVL_MAXVAL) { 632 errc(2, EAGAIN, "Max recursion level (%d) exceeded.", 633 MKLVL_MAXVAL); 634 } else { 635 char new_value[32]; 636 sprintf(new_value, "%d", level + 1); 637 setenv(MKLVL_ENVVAR, new_value, 1); 638 } 639#endif /* WANT_ENV_MKLVL */ 640} 641 642/** 643 * main 644 * The main function, for obvious reasons. Initializes variables 645 * and a few modules, then parses the arguments give it in the 646 * environment and on the command line. Reads the system makefile 647 * followed by either Makefile, makefile or the file given by the 648 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 649 * flags it has received by then uses either the Make or the Compat 650 * module to create the initial list of targets. 651 * 652 * Results: 653 * If -q was given, exits -1 if anything was out-of-date. Else it exits 654 * 0. 655 * 656 * Side Effects: 657 * The program exits when done. Targets are created. etc. etc. etc. 658 */ 659int 660main(int argc, char **argv) 661{ 662 const char *machine; 663 const char *machine_arch; 664 const char *machine_cpu; 665 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 666 const char *p; 667 const char *pathp; 668 const char *path; 669 char mdpath[MAXPATHLEN]; 670 char obpath[MAXPATHLEN]; 671 char cdpath[MAXPATHLEN]; 672 char *cp = NULL, *start; 673 674 /* 675 * Initialize file global variables. 676 */ 677 expandVars = TRUE; 678 noBuiltins = FALSE; /* Read the built-in rules */ 679 forceJobs = FALSE; /* No -j flag */ 680 curdir = cdpath; 681 682 /* 683 * Initialize program global variables. 684 */ 685 beSilent = FALSE; /* Print commands as executed */ 686 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 687 noExecute = FALSE; /* Execute all commands */ 688 keepgoing = FALSE; /* Stop on error */ 689 allPrecious = FALSE; /* Remove targets when interrupted */ 690 queryFlag = FALSE; /* This is not just a check-run */ 691 touchFlag = FALSE; /* Actually update targets */ 692 usePipes = TRUE; /* Catch child output in pipes */ 693 debug = 0; /* No debug verbosity, please. */ 694 jobsRunning = FALSE; 695 696 jobLimit = DEFMAXJOBS; 697 compatMake = FALSE; /* No compat mode */ 698 699 check_make_level(); 700 701#ifdef RLIMIT_NOFILE 702 /* 703 * get rid of resource limit on file descriptors 704 */ 705 { 706 struct rlimit rl; 707 if (getrlimit(RLIMIT_NOFILE, &rl) == -1) { 708 err(2, "getrlimit"); 709 } 710 rl.rlim_cur = rl.rlim_max; 711 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) { 712 err(2, "setrlimit"); 713 } 714 } 715#endif 716 717 /* 718 * FreeBSD/pc98 kernel used to set the utsname.machine to 719 * "i386", and MACHINE was defined as "i386", so it could 720 * not be distinguished from FreeBSD/i386. Therefore, we 721 * had to check machine.ispc98 and adjust the MACHINE 722 * variable. 723 * NOTE: The code is still here to be able to compile new 724 * make binary on old FreeBSD/pc98 systems, and have the 725 * MACHINE variable set properly. 726 */ 727 if ((machine = getenv("MACHINE")) == NULL) { 728 int ispc98; 729 size_t len; 730 731 len = sizeof(ispc98); 732 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 733 if (ispc98) 734 machine = "pc98"; 735 } 736 } 737 738 /* 739 * Get the name of this type of MACHINE from utsname 740 * so we can share an executable for similar machines. 741 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 742 * 743 * Note that both MACHINE and MACHINE_ARCH are decided at 744 * run-time. 745 */ 746 if (machine == NULL) { 747 static struct utsname utsname; 748 749 if (uname(&utsname) == -1) 750 err(2, "uname"); 751 machine = utsname.machine; 752 } 753 754 if ((machine_arch = getenv("MACHINE_ARCH")) == NULL) { 755#ifdef MACHINE_ARCH 756 machine_arch = MACHINE_ARCH; 757#else 758 machine_arch = "unknown"; 759#endif 760 } 761 762 /* 763 * Set machine_cpu to the minumum supported CPU revision based 764 * on the target architecture, if not already set. 765 */ 766 if ((machine_cpu = getenv("MACHINE_CPU")) == NULL) { 767 if (!strcmp(machine_arch, "i386")) 768 machine_cpu = "i386"; 769 else if (!strcmp(machine_arch, "alpha")) 770 machine_cpu = "ev4"; 771 else 772 machine_cpu = "unknown"; 773 } 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 */ 786 787 /* 788 * Initialize the Shell so that we have a shell for != assignments 789 * on the command line. 790 */ 791 Shell_Init(); 792 793 /* 794 * Initialize various variables. 795 * MAKE also gets this name, for compatibility 796 * .MAKEFLAGS gets set to the empty string just in case. 797 * MFLAGS also gets initialized empty, for compatibility. 798 */ 799 Var_SetGlobal("MAKE", argv[0]); 800 Var_SetGlobal(".MAKEFLAGS", ""); 801 Var_SetGlobal("MFLAGS", ""); 802 Var_SetGlobal("MACHINE", machine); 803 Var_SetGlobal("MACHINE_ARCH", machine_arch); 804 Var_SetGlobal("MACHINE_CPU", machine_cpu); 805#ifdef MAKE_VERSION 806 Var_SetGlobal("MAKE_VERSION", MAKE_VERSION); 807#endif 808 809 /* 810 * First snag things out of the MAKEFLAGS environment 811 * variable. Then parse the command line arguments. 812 */ 813 Main_ParseArgLine(getenv("MAKEFLAGS"), 1); 814 815 MainParseArgs(argc, argv); 816 817 /* 818 * Find where we are... 819 */ 820 if (getcwd(curdir, MAXPATHLEN) == NULL) 821 err(2, NULL); 822 823 { 824 struct stat sa; 825 826 if (stat(curdir, &sa) == -1) 827 err(2, "%s", curdir); 828 } 829 830 /* 831 * The object directory location is determined using the 832 * following order of preference: 833 * 834 * 1. MAKEOBJDIRPREFIX`cwd` 835 * 2. MAKEOBJDIR 836 * 3. PATH_OBJDIR.${MACHINE} 837 * 4. PATH_OBJDIR 838 * 5. PATH_OBJDIRPREFIX`cwd` 839 * 840 * If one of the first two fails, use the current directory. 841 * If the remaining three all fail, use the current directory. 842 * 843 * Once things are initted, 844 * have to add the original directory to the search path, 845 * and modify the paths for the Makefiles apropriately. The 846 * current directory is also placed as a variable for make scripts. 847 */ 848 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 849 if (!(path = getenv("MAKEOBJDIR"))) { 850 path = PATH_OBJDIR; 851 pathp = PATH_OBJDIRPREFIX; 852 snprintf(mdpath, MAXPATHLEN, "%s.%s", path, machine); 853 if (!(objdir = chdir_verify_path(mdpath, obpath))) 854 if (!(objdir=chdir_verify_path(path, obpath))) { 855 snprintf(mdpath, MAXPATHLEN, 856 "%s%s", pathp, curdir); 857 if (!(objdir=chdir_verify_path(mdpath, 858 obpath))) 859 objdir = curdir; 860 } 861 } 862 else if (!(objdir = chdir_verify_path(path, obpath))) 863 objdir = curdir; 864 } 865 else { 866 snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 867 if (!(objdir = chdir_verify_path(mdpath, obpath))) 868 objdir = curdir; 869 } 870 Dir_InitDot(); /* Initialize the "." directory */ 871 if (objdir != curdir) 872 Path_AddDir(&dirSearchPath, curdir); 873 Var_SetGlobal(".ST_EXPORTVAR", "YES"); 874 Var_SetGlobal(".CURDIR", curdir); 875 Var_SetGlobal(".OBJDIR", objdir); 876 877 if (getenv("MAKE_JOBS_FIFO") != NULL) 878 forceJobs = TRUE; 879 /* 880 * Be compatible if user did not specify -j and did not explicitly 881 * turned compatibility on 882 */ 883 if (!compatMake && !forceJobs) 884 compatMake = TRUE; 885 886 /* 887 * Initialize target and suffix modules in preparation for 888 * parsing the makefile(s) 889 */ 890 Targ_Init(); 891 Suff_Init(); 892 893 DEFAULT = NULL; 894 time(&now); 895 896 /* 897 * Set up the .TARGETS variable to contain the list of targets to be 898 * created. If none specified, make the variable empty -- the parser 899 * will fill the thing in with the default or .MAIN target. 900 */ 901 if (Lst_IsEmpty(&create)) { 902 Var_SetGlobal(".TARGETS", ""); 903 } else { 904 LstNode *ln; 905 906 for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) { 907 char *name = Lst_Datum(ln); 908 909 Var_Append(".TARGETS", name, VAR_GLOBAL); 910 } 911 } 912 913 914 /* 915 * If no user-supplied system path was given (through the -m option) 916 * add the directories from the DEFSYSPATH (more than one may be given 917 * as dir1:...:dirn) to the system include path. 918 */ 919 if (TAILQ_EMPTY(&sysIncPath)) { 920 char syspath[] = PATH_DEFSYSPATH; 921 922 for (start = syspath; *start != '\0'; start = cp) { 923 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 924 continue; 925 if (*cp == '\0') { 926 Path_AddDir(&sysIncPath, start); 927 } else { 928 *cp++ = '\0'; 929 Path_AddDir(&sysIncPath, start); 930 } 931 } 932 } 933 934 /* 935 * Read in the built-in rules first, followed by the specified 936 * makefile, if it was (makefile != (char *) NULL), or the default 937 * Makefile and makefile, in that order, if it wasn't. 938 */ 939 if (!noBuiltins) { 940 /* Path of sys.mk */ 941 Lst sysMkPath = Lst_Initializer(sysMkPath); 942 LstNode *ln; 943 char defsysmk[] = PATH_DEFSYSMK; 944 945 Path_Expand(defsysmk, &sysIncPath, &sysMkPath); 946 if (Lst_IsEmpty(&sysMkPath)) 947 Fatal("make: no system rules (%s).", PATH_DEFSYSMK); 948 LST_FOREACH(ln, &sysMkPath) { 949 if (!ReadMakefile(Lst_Datum(ln))) 950 break; 951 } 952 if (ln != NULL) 953 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 954 Lst_Destroy(&sysMkPath, free); 955 } 956 957 if (!Lst_IsEmpty(&makefiles)) { 958 LstNode *ln; 959 960 LST_FOREACH(ln, &makefiles) { 961 if (!ReadMakefile(Lst_Datum(ln))) 962 break; 963 } 964 if (ln != NULL) 965 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 966 } else if (!ReadMakefile("BSDmakefile")) 967 if (!ReadMakefile("makefile")) 968 ReadMakefile("Makefile"); 969 970 ReadMakefile(".depend"); 971 972 /* Install all the flags into the MAKE envariable. */ 973 if (((p = Var_Value(".MAKEFLAGS", VAR_GLOBAL)) != NULL) && *p) 974 setenv("MAKEFLAGS", p, 1); 975 976 /* 977 * For compatibility, look at the directories in the VPATH variable 978 * and add them to the search path, if the variable is defined. The 979 * variable's value is in the same format as the PATH envariable, i.e. 980 * <directory>:<directory>:<directory>... 981 */ 982 if (Var_Exists("VPATH", VAR_CMD)) { 983 /* 984 * GCC stores string constants in read-only memory, but 985 * Var_Subst will want to write this thing, so store it 986 * in an array 987 */ 988 static char VPATH[] = "${VPATH}"; 989 Buffer *buf; 990 char *vpath; 991 char *ptr; 992 char savec; 993 994 buf = Var_Subst(VPATH, VAR_CMD, FALSE); 995 996 vpath = Buf_Data(buf); 997 do { 998 /* skip to end of directory */ 999 for (ptr = vpath; *ptr != ':' && *ptr != '\0'; ptr++) 1000 ; 1001 1002 /* Save terminator character so know when to stop */ 1003 savec = *ptr; 1004 *ptr = '\0'; 1005 1006 /* Add directory to search path */ 1007 Path_AddDir(&dirSearchPath, vpath); 1008 1009 vpath = ptr + 1; 1010 } while (savec != '\0'); 1011 1012 Buf_Destroy(buf, TRUE); 1013 } 1014 1015 /* 1016 * Now that all search paths have been read for suffixes et al, it's 1017 * time to add the default search path to their lists... 1018 */ 1019 Suff_DoPaths(); 1020 1021 /* print the initial graph, if the user requested it */ 1022 if (DEBUG(GRAPH1)) 1023 Targ_PrintGraph(1); 1024 1025 /* print the values of any variables requested by the user */ 1026 if (Lst_IsEmpty(&variables)) { 1027 /* 1028 * Since the user has not requested that any variables 1029 * be printed, we can build targets. 1030 * 1031 * Have read the entire graph and need to make a list of targets 1032 * to create. If none was given on the command line, we consult 1033 * the parsing module to find the main target(s) to create. 1034 */ 1035 Lst targs = Lst_Initializer(targs); 1036 1037 if (Lst_IsEmpty(&create)) 1038 Parse_MainName(&targs); 1039 else 1040 Targ_FindList(&targs, &create, TARG_CREATE); 1041 1042 if (compatMake) { 1043 /* 1044 * Compat_Init will take care of creating 1045 * all the targets as well as initializing 1046 * the module. 1047 */ 1048 Compat_Run(&targs); 1049 outOfDate = 0; 1050 } else { 1051 /* 1052 * Initialize job module before traversing 1053 * the graph, now that any .BEGIN and .END 1054 * targets have been read. This is done 1055 * only if the -q flag wasn't given (to 1056 * prevent the .BEGIN from being executed 1057 * should it exist). 1058 */ 1059 if (!queryFlag) { 1060 Job_Init(jobLimit); 1061 jobsRunning = TRUE; 1062 } 1063 1064 /* Traverse the graph, checking on all the targets */ 1065 outOfDate = Make_Run(&targs); 1066 } 1067 Lst_Destroy(&targs, NOFREE); 1068 1069 } else { 1070 Var_Print(&variables, expandVars); 1071 } 1072 1073 Lst_Destroy(&variables, free); 1074 Lst_Destroy(&makefiles, free); 1075 Lst_Destroy(&create, free); 1076 1077 /* print the graph now it's been processed if the user requested it */ 1078 if (DEBUG(GRAPH2)) 1079 Targ_PrintGraph(2); 1080 1081 if (queryFlag && outOfDate) 1082 return (1); 1083 else 1084 return (0); 1085} 1086 1087