parse.c revision 1.116
1 /* $NetBSD: parse.c,v 1.116 2006/10/15 08:38:22 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #ifndef MAKE_NATIVE 72 static char rcsid[] = "$NetBSD: parse.c,v 1.116 2006/10/15 08:38:22 dsl Exp $"; 73 #else 74 #include <sys/cdefs.h> 75 #ifndef lint 76 #if 0 77 static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 78 #else 79 __RCSID("$NetBSD: parse.c,v 1.116 2006/10/15 08:38:22 dsl Exp $"); 80 #endif 81 #endif /* not lint */ 82 #endif 83 84 /*- 85 * parse.c -- 86 * Functions to parse a makefile. 87 * 88 * One function, Parse_Init, must be called before any functions 89 * in this module are used. After that, the function Parse_File is the 90 * main entry point and controls most of the other functions in this 91 * module. 92 * 93 * Most important structures are kept in Lsts. Directories for 94 * the #include "..." function are kept in the 'parseIncPath' Lst, while 95 * those for the #include <...> are kept in the 'sysIncPath' Lst. The 96 * targets currently being defined are kept in the 'targets' Lst. 97 * 98 * The variables 'fname' and 'lineno' are used to track the name 99 * of the current file and the line number in that file so that error 100 * messages can be more meaningful. 101 * 102 * Interface: 103 * Parse_Init Initialization function which must be 104 * called before anything else in this module 105 * is used. 106 * 107 * Parse_End Cleanup the module 108 * 109 * Parse_File Function used to parse a makefile. It must 110 * be given the name of the file, which should 111 * already have been opened, and a function 112 * to call to read a character from the file. 113 * 114 * Parse_IsVar Returns TRUE if the given line is a 115 * variable assignment. Used by MainParseArgs 116 * to determine if an argument is a target 117 * or a variable assignment. Used internally 118 * for pretty much the same thing... 119 * 120 * Parse_Error Function called when an error occurs in 121 * parsing. Used by the variable and 122 * conditional modules. 123 * Parse_MainName Returns a Lst of the main target to create. 124 */ 125 126 #include <ctype.h> 127 #include <errno.h> 128 #include <stdarg.h> 129 #include <stdio.h> 130 131 #include "make.h" 132 #include "hash.h" 133 #include "dir.h" 134 #include "job.h" 135 #include "buf.h" 136 #include "pathnames.h" 137 138 /* 139 * These values are returned by ParseEOF to tell Parse_File whether to 140 * CONTINUE parsing, i.e. it had only reached the end of an include file, 141 * or if it's DONE. 142 */ 143 #define CONTINUE 1 144 #define DONE 0 145 static Lst targets; /* targets we're working on */ 146 #ifdef CLEANUP 147 static Lst targCmds; /* command lines for targets */ 148 #endif 149 static Boolean inLine; /* true if currently in a dependency 150 * line or its commands */ 151 typedef struct { 152 char *str; 153 char *ptr; 154 } PTR; 155 156 static int fatals = 0; 157 158 static GNode *mainNode; /* The main target to create. This is the 159 * first target on the first dependency 160 * line in the first makefile */ 161 typedef struct IFile { 162 char *fname; /* name of previous file */ 163 int lineno; /* saved line number */ 164 FILE * F; /* the open stream */ 165 PTR * P; /* the char pointer */ 166 } IFile; 167 168 static IFile curFile; 169 170 171 /* 172 * Definitions for handling #include specifications 173 */ 174 175 static Lst includes; /* stack of IFiles generated by 176 * #includes */ 177 Lst parseIncPath; /* list of directories for "..." includes */ 178 Lst sysIncPath; /* list of directories for <...> includes */ 179 Lst defIncPath; /* default directories for <...> includes */ 180 181 /*- 182 * specType contains the SPECial TYPE of the current target. It is 183 * Not if the target is unspecial. If it *is* special, however, the children 184 * are linked as children of the parent but not vice versa. This variable is 185 * set in ParseDoDependency 186 */ 187 typedef enum { 188 Begin, /* .BEGIN */ 189 Default, /* .DEFAULT */ 190 End, /* .END */ 191 Ignore, /* .IGNORE */ 192 Includes, /* .INCLUDES */ 193 Interrupt, /* .INTERRUPT */ 194 Libs, /* .LIBS */ 195 MFlags, /* .MFLAGS or .MAKEFLAGS */ 196 Main, /* .MAIN and we don't have anything user-specified to 197 * make */ 198 NoExport, /* .NOEXPORT */ 199 NoPath, /* .NOPATH */ 200 Not, /* Not special */ 201 NotParallel, /* .NOTPARALLEL */ 202 Null, /* .NULL */ 203 ExObjdir, /* .OBJDIR */ 204 Order, /* .ORDER */ 205 Parallel, /* .PARALLEL */ 206 ExPath, /* .PATH */ 207 Phony, /* .PHONY */ 208 #ifdef POSIX 209 Posix, /* .POSIX */ 210 #endif 211 Precious, /* .PRECIOUS */ 212 ExShell, /* .SHELL */ 213 Silent, /* .SILENT */ 214 SingleShell, /* .SINGLESHELL */ 215 Suffixes, /* .SUFFIXES */ 216 Wait, /* .WAIT */ 217 Attribute /* Generic attribute */ 218 } ParseSpecial; 219 220 static ParseSpecial specType; 221 static int waiting; 222 223 #define LPAREN '(' 224 #define RPAREN ')' 225 /* 226 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 227 * seen, then set to each successive source on the line. 228 */ 229 static GNode *predecessor; 230 231 /* 232 * The parseKeywords table is searched using binary search when deciding 233 * if a target or source is special. The 'spec' field is the ParseSpecial 234 * type of the keyword ("Not" if the keyword isn't special as a target) while 235 * the 'op' field is the operator to apply to the list of targets if the 236 * keyword is used as a source ("0" if the keyword isn't special as a source) 237 */ 238 static struct { 239 const char *name; /* Name of keyword */ 240 ParseSpecial spec; /* Type when used as a target */ 241 int op; /* Operator when used as a source */ 242 } parseKeywords[] = { 243 { ".BEGIN", Begin, 0 }, 244 { ".DEFAULT", Default, 0 }, 245 { ".END", End, 0 }, 246 { ".EXEC", Attribute, OP_EXEC }, 247 { ".IGNORE", Ignore, OP_IGNORE }, 248 { ".INCLUDES", Includes, 0 }, 249 { ".INTERRUPT", Interrupt, 0 }, 250 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 251 { ".JOIN", Attribute, OP_JOIN }, 252 { ".LIBS", Libs, 0 }, 253 { ".MADE", Attribute, OP_MADE }, 254 { ".MAIN", Main, 0 }, 255 { ".MAKE", Attribute, OP_MAKE }, 256 { ".MAKEFLAGS", MFlags, 0 }, 257 { ".MFLAGS", MFlags, 0 }, 258 { ".NOPATH", NoPath, OP_NOPATH }, 259 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 260 { ".NOTPARALLEL", NotParallel, 0 }, 261 { ".NO_PARALLEL", NotParallel, 0 }, 262 { ".NULL", Null, 0 }, 263 { ".OBJDIR", ExObjdir, 0 }, 264 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 265 { ".ORDER", Order, 0 }, 266 { ".PARALLEL", Parallel, 0 }, 267 { ".PATH", ExPath, 0 }, 268 { ".PHONY", Phony, OP_PHONY }, 269 #ifdef POSIX 270 { ".POSIX", Posix, 0 }, 271 #endif 272 { ".PRECIOUS", Precious, OP_PRECIOUS }, 273 { ".RECURSIVE", Attribute, OP_MAKE }, 274 { ".SHELL", ExShell, 0 }, 275 { ".SILENT", Silent, OP_SILENT }, 276 { ".SINGLESHELL", SingleShell, 0 }, 277 { ".SUFFIXES", Suffixes, 0 }, 278 { ".USE", Attribute, OP_USE }, 279 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 280 { ".WAIT", Wait, 0 }, 281 }; 282 283 /* 284 * Used by ParseDoSpecialSrc() 285 */ 286 typedef struct { 287 int op; 288 char *src; 289 Lst allsrc; 290 } SpecialSrc; 291 292 static int ParseIsEscaped(const char *, const char *); 293 static void ParseErrorInternal(char *, size_t, int, const char *, ...) 294 __attribute__((__format__(__printf__, 4, 5))); 295 static void ParseVErrorInternal(char *, size_t, int, const char *, va_list) 296 __attribute__((__format__(__printf__, 4, 0))); 297 static int ParseFindKeyword(char *); 298 static int ParseLinkSrc(ClientData, ClientData); 299 static int ParseDoOp(ClientData, ClientData); 300 static int ParseAddDep(ClientData, ClientData); 301 static int ParseDoSpecialSrc(ClientData, ClientData); 302 static void ParseDoSrc(int, char *, Lst, Boolean); 303 static int ParseFindMain(ClientData, ClientData); 304 static int ParseAddDir(ClientData, ClientData); 305 static int ParseClearPath(ClientData, ClientData); 306 static void ParseDoDependency(char *); 307 static int ParseAddCmd(ClientData, ClientData); 308 static inline int ParseReadc(void); 309 static void ParseUnreadc(int); 310 static void ParseHasCommands(ClientData); 311 static void ParseDoInclude(char *); 312 static void ParseSetParseFile(char *); 313 #ifdef SYSVINCLUDE 314 static void ParseTraditionalInclude(char *); 315 #endif 316 static int ParseEOF(int); 317 static char *ParseReadLine(void); 318 static char *ParseSkipLine(int, int); 319 static void ParseFinishLine(void); 320 static void ParseMark(GNode *); 321 322 extern int maxJobs; 323 324 325 /*- 326 *---------------------------------------------------------------------- 327 * ParseIsEscaped -- 328 * Check if the current character is escaped on the current line 329 * 330 * Results: 331 * 0 if the character is not backslash escaped, 1 otherwise 332 * 333 * Side Effects: 334 * None 335 *---------------------------------------------------------------------- 336 */ 337 static int 338 ParseIsEscaped(const char *line, const char *c) 339 { 340 int active = 0; 341 for (;;) { 342 if (line == c) 343 return active; 344 if (*--c != '\\') 345 return active; 346 active = !active; 347 } 348 } 349 350 /*- 351 *---------------------------------------------------------------------- 352 * ParseFindKeyword -- 353 * Look in the table of keywords for one matching the given string. 354 * 355 * Input: 356 * str String to find 357 * 358 * Results: 359 * The index of the keyword, or -1 if it isn't there. 360 * 361 * Side Effects: 362 * None 363 *---------------------------------------------------------------------- 364 */ 365 static int 366 ParseFindKeyword(char *str) 367 { 368 int start, end, cur; 369 int diff; 370 371 start = 0; 372 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 373 374 do { 375 cur = start + ((end - start) / 2); 376 diff = strcmp(str, parseKeywords[cur].name); 377 378 if (diff == 0) { 379 return (cur); 380 } else if (diff < 0) { 381 end = cur - 1; 382 } else { 383 start = cur + 1; 384 } 385 } while (start <= end); 386 return (-1); 387 } 388 389 /*- 390 * ParseVErrorInternal -- 391 * Error message abort function for parsing. Prints out the context 392 * of the error (line number and file) as well as the message with 393 * two optional arguments. 394 * 395 * Results: 396 * None 397 * 398 * Side Effects: 399 * "fatals" is incremented if the level is PARSE_FATAL. 400 */ 401 /* VARARGS */ 402 static void 403 ParseVErrorInternal(char *cfname, size_t clineno, int type, const char *fmt, 404 va_list ap) 405 { 406 static Boolean fatal_warning_error_printed = FALSE; 407 408 (void)fprintf(stderr, "%s: \"", progname); 409 410 if (*cfname != '/') { 411 char *cp; 412 const char *dir; 413 414 /* 415 * Nothing is more anoying than not knowing which Makefile 416 * is the culprit. 417 */ 418 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 419 if (dir == NULL || *dir == '\0' || 420 (*dir == '.' && dir[1] == '\0')) 421 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 422 if (dir == NULL) 423 dir = "."; 424 425 (void)fprintf(stderr, "%s/%s", dir, cfname); 426 } else 427 (void)fprintf(stderr, "%s", cfname); 428 429 (void)fprintf(stderr, "\" line %d: ", (int)clineno); 430 if (type == PARSE_WARNING) 431 (void)fprintf(stderr, "warning: "); 432 (void)vfprintf(stderr, fmt, ap); 433 (void)fprintf(stderr, "\n"); 434 (void)fflush(stderr); 435 if (type == PARSE_FATAL || parseWarnFatal) 436 fatals += 1; 437 if (parseWarnFatal && !fatal_warning_error_printed) { 438 Error("parsing warnings being treated as errors"); 439 fatal_warning_error_printed = TRUE; 440 } 441 } 442 443 /*- 444 * ParseErrorInternal -- 445 * Error function 446 * 447 * Results: 448 * None 449 * 450 * Side Effects: 451 * None 452 */ 453 /* VARARGS */ 454 static void 455 ParseErrorInternal(char *cfname, size_t clineno, int type, const char *fmt, ...) 456 { 457 va_list ap; 458 459 va_start(ap, fmt); 460 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 461 va_end(ap); 462 } 463 464 /*- 465 * Parse_Error -- 466 * External interface to ParseErrorInternal; uses the default filename 467 * Line number. 468 * 469 * Results: 470 * None 471 * 472 * Side Effects: 473 * None 474 */ 475 /* VARARGS */ 476 void 477 Parse_Error(int type, const char *fmt, ...) 478 { 479 va_list ap; 480 481 va_start(ap, fmt); 482 ParseVErrorInternal(curFile.fname, curFile.lineno, type, fmt, ap); 483 va_end(ap); 484 } 485 486 /*- 487 *--------------------------------------------------------------------- 488 * ParseLinkSrc -- 489 * Link the parent node to its new child. Used in a Lst_ForEach by 490 * ParseDoDependency. If the specType isn't 'Not', the parent 491 * isn't linked as a parent of the child. 492 * 493 * Input: 494 * pgnp The parent node 495 * cgpn The child node 496 * 497 * Results: 498 * Always = 0 499 * 500 * Side Effects: 501 * New elements are added to the parents list of cgn and the 502 * children list of cgn. the unmade field of pgn is updated 503 * to reflect the additional child. 504 *--------------------------------------------------------------------- 505 */ 506 static int 507 ParseLinkSrc(ClientData pgnp, ClientData cgnp) 508 { 509 GNode *pgn = (GNode *)pgnp; 510 GNode *cgn = (GNode *)cgnp; 511 512 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 513 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts)); 514 (void)Lst_AtEnd(pgn->children, (ClientData)cgn); 515 if (specType == Not) 516 (void)Lst_AtEnd(cgn->parents, (ClientData)pgn); 517 pgn->unmade += 1; 518 if (DEBUG(PARSE)) { 519 fprintf(debug_file, "# ParseLinkSrc: added child %s - %s\n", pgn->name, cgn->name); 520 Targ_PrintNode(pgn, 0); 521 Targ_PrintNode(cgn, 0); 522 } 523 return (0); 524 } 525 526 /*- 527 *--------------------------------------------------------------------- 528 * ParseDoOp -- 529 * Apply the parsed operator to the given target node. Used in a 530 * Lst_ForEach call by ParseDoDependency once all targets have 531 * been found and their operator parsed. If the previous and new 532 * operators are incompatible, a major error is taken. 533 * 534 * Input: 535 * gnp The node to which the operator is to be applied 536 * opp The operator to apply 537 * 538 * Results: 539 * Always 0 540 * 541 * Side Effects: 542 * The type field of the node is altered to reflect any new bits in 543 * the op. 544 *--------------------------------------------------------------------- 545 */ 546 static int 547 ParseDoOp(ClientData gnp, ClientData opp) 548 { 549 GNode *gn = (GNode *)gnp; 550 int op = *(int *)opp; 551 /* 552 * If the dependency mask of the operator and the node don't match and 553 * the node has actually had an operator applied to it before, and 554 * the operator actually has some dependency information in it, complain. 555 */ 556 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 557 !OP_NOP(gn->type) && !OP_NOP(op)) 558 { 559 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 560 return (1); 561 } 562 563 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 564 /* 565 * If the node was the object of a :: operator, we need to create a 566 * new instance of it for the children and commands on this dependency 567 * line. The new instance is placed on the 'cohorts' list of the 568 * initial one (note the initial one is not on its own cohorts list) 569 * and the new instance is linked to all parents of the initial 570 * instance. 571 */ 572 GNode *cohort; 573 574 /* 575 * Propagate copied bits to the initial node. They'll be propagated 576 * back to the rest of the cohorts later. 577 */ 578 gn->type |= op & ~OP_OPMASK; 579 580 cohort = Targ_NewGN(gn->name); 581 /* 582 * Make the cohort invisible as well to avoid duplicating it into 583 * other variables. True, parents of this target won't tend to do 584 * anything with their local variables, but better safe than 585 * sorry. (I think this is pointless now, since the relevant list 586 * traversals will no longer see this node anyway. -mycroft) 587 */ 588 cohort->type = op | OP_INVISIBLE; 589 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 590 cohort->centurion = gn; 591 gn->unmade_cohorts += 1; 592 } else { 593 /* 594 * We don't want to nuke any previous flags (whatever they were) so we 595 * just OR the new operator into the old 596 */ 597 gn->type |= op; 598 } 599 600 return (0); 601 } 602 603 /*- 604 *--------------------------------------------------------------------- 605 * ParseAddDep -- 606 * Check if the pair of GNodes given needs to be synchronized. 607 * This has to be when two nodes are on different sides of a 608 * .WAIT directive. 609 * 610 * Results: 611 * Returns 1 if the two targets need to be ordered, 0 otherwise. 612 * If it returns 1, the search can stop 613 * 614 * Side Effects: 615 * A dependency can be added between the two nodes. 616 * The dependency is tagged for recursive addition to 617 * all children of sp. 618 * 619 *--------------------------------------------------------------------- 620 */ 621 static int 622 ParseAddDep(ClientData pp, ClientData sp) 623 { 624 GNode *p = (GNode *)pp; 625 GNode *s = (GNode *)sp; 626 627 if (DEBUG(PARSE)) 628 fprintf(debug_file, "ParseAddDep: %p(%s):%d %p(%s):%d\n", 629 p, p->name, p->order, s, s->name, s->order); 630 if (p->order >= s->order) 631 return 1; 632 633 /* 634 * XXX: This can cause loops, and loops can cause unmade targets, 635 * but checking is tedious, and the debugging output can show the 636 * problem 637 */ 638 (void)Lst_AtEnd(p->successors, (ClientData)s); 639 (void)Lst_AtEnd(s->preds, (ClientData)p); 640 (void)Lst_AtEnd(s->recpreds, (ClientData)p); 641 if (DEBUG(PARSE)) { 642 fprintf(debug_file, "# ParseAddDep: added .WAIT dependency %s - %s\n", 643 p->name, s->name); 644 Targ_PrintNode(p, 0); 645 Targ_PrintNode(s, 0); 646 } 647 return 0; 648 } 649 650 /* - 651 *--------------------------------------------------------------------- 652 * ParseDoSpecialSrc -- 653 * ParseDoSrc struck an unexpanded variable in a src. 654 * The most likely reason is a src that refers to .TARGET or 655 * .PREFIX so we get called to set those for each target 656 * and then call ParseDoSrc again to do the real work. 657 * 658 * Input: 659 * tp A target GNode * 660 * sp A SpecialSrc * which contains the args we need 661 * for ParseDoSrc. 662 * 663 * Results: 664 * Goodness 665 * 666 * Side Effects: 667 * The target GNode will have .TARGET and .PREFIX set, this seems 668 * harmless. 669 */ 670 static int 671 ParseDoSpecialSrc(ClientData tp, ClientData sp) 672 { 673 GNode *tn = (GNode *)tp; 674 GNode *gn; 675 SpecialSrc *ss = (SpecialSrc *)sp; 676 char *cp; 677 char *cp2; 678 char *pref; 679 680 /* 681 * If the target is a suffix rule, leave it alone. 682 */ 683 if (Suff_IsTransform(tn->name)) { 684 ParseDoSrc(ss->op, ss->src, ss->allsrc, FALSE); /* don't come back */ 685 return 0; 686 } 687 Var_Set(TARGET, tn->name, tn, 0); 688 if ((pref = strrchr(tn->name, '/'))) 689 pref++; 690 else 691 pref = tn->name; 692 if ((cp2 = strchr(pref, '.')) > pref) { 693 cp = estrdup(pref); 694 cp[cp2 - pref] = '\0'; 695 Var_Set(PREFIX, cp, tn, 0); 696 free(cp); 697 } else 698 Var_Set(PREFIX, pref, tn, 0); 699 cp = Var_Subst(NULL, ss->src, tn, FALSE); 700 if (strchr(cp, '$')) { 701 Parse_Error(PARSE_WARNING, "Cannot resolve '%s' here", ss->src); 702 ParseDoSrc(ss->op, ss->src, ss->allsrc, FALSE); /* don't come back */ 703 return 1; /* stop list traversal */ 704 } 705 /* 706 * We don't want to make every target dependent on sources for 707 * other targets. This is the bit of ParseDoSrc which is relevant. 708 * The main difference is we don't link the resolved src to all targets. 709 */ 710 gn = Targ_FindNode(cp, TARG_CREATE); 711 if (ss->op) { 712 gn->type |= ss->op; 713 } else { 714 ParseLinkSrc((ClientData)tn, (ClientData)gn); 715 } 716 if (DEBUG(PARSE)) 717 fprintf(debug_file, "ParseDoSpecialSrc: set %p(%s):%d (was %d)\n", 718 gn, gn->name, waiting, gn->order); 719 gn->order = waiting; 720 (void)Lst_AtEnd(ss->allsrc, (ClientData)gn); 721 if (waiting) { 722 Lst_ForEach(ss->allsrc, ParseAddDep, (ClientData)gn); 723 } 724 return 0; 725 } 726 727 728 /*- 729 *--------------------------------------------------------------------- 730 * ParseDoSrc -- 731 * Given the name of a source, figure out if it is an attribute 732 * and apply it to the targets if it is. Else decide if there is 733 * some attribute which should be applied *to* the source because 734 * of some special target and apply it if so. Otherwise, make the 735 * source be a child of the targets in the list 'targets' 736 * 737 * Input: 738 * tOp operator (if any) from special targets 739 * src name of the source to handle 740 * allsrc List of all sources to wait for 741 * resolve boolean - should we try and resolve .TARGET refs. 742 * 743 * Results: 744 * None 745 * 746 * Side Effects: 747 * Operator bits may be added to the list of targets or to the source. 748 * The targets may have a new source added to their lists of children. 749 *--------------------------------------------------------------------- 750 */ 751 static void 752 ParseDoSrc(int tOp, char *src, Lst allsrc, Boolean resolve) 753 { 754 GNode *gn = NULL; 755 756 if (*src == '.' && isupper ((unsigned char)src[1])) { 757 int keywd = ParseFindKeyword(src); 758 if (keywd != -1) { 759 int op = parseKeywords[keywd].op; 760 if (op != 0) { 761 Lst_ForEach(targets, ParseDoOp, (ClientData)&op); 762 return; 763 } 764 if (parseKeywords[keywd].spec == Wait) { 765 waiting++; 766 return; 767 } 768 } 769 } 770 771 switch (specType) { 772 case Main: 773 /* 774 * If we have noted the existence of a .MAIN, it means we need 775 * to add the sources of said target to the list of things 776 * to create. The string 'src' is likely to be free, so we 777 * must make a new copy of it. Note that this will only be 778 * invoked if the user didn't specify a target on the command 779 * line. This is to allow #ifmake's to succeed, or something... 780 */ 781 (void)Lst_AtEnd(create, (ClientData)estrdup(src)); 782 /* 783 * Add the name to the .TARGETS variable as well, so the user cna 784 * employ that, if desired. 785 */ 786 Var_Append(".TARGETS", src, VAR_GLOBAL); 787 return; 788 789 case Order: 790 /* 791 * Create proper predecessor/successor links between the previous 792 * source and the current one. 793 */ 794 gn = Targ_FindNode(src, TARG_CREATE); 795 if (predecessor != NILGNODE) { 796 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 797 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 798 if (DEBUG(PARSE)) { 799 fprintf(debug_file, "# ParseDoSrc: added Order dependency %s - %s\n", 800 predecessor->name, gn->name); 801 Targ_PrintNode(predecessor, 0); 802 Targ_PrintNode(gn, 0); 803 } 804 } 805 /* 806 * The current source now becomes the predecessor for the next one. 807 */ 808 predecessor = gn; 809 break; 810 811 default: 812 /* 813 * If the source is not an attribute, we need to find/create 814 * a node for it. After that we can apply any operator to it 815 * from a special target or link it to its parents, as 816 * appropriate. 817 * 818 * In the case of a source that was the object of a :: operator, 819 * the attribute is applied to all of its instances (as kept in 820 * the 'cohorts' list of the node) or all the cohorts are linked 821 * to all the targets. 822 */ 823 if (resolve && strchr(src, '$')) { 824 SpecialSrc ss; 825 826 ss.op = tOp; 827 ss.src = src; 828 ss.allsrc = allsrc; 829 830 /* 831 * If src cannot be fully resolved, we'll be called again 832 * with resolve==FALSE. 833 */ 834 Lst_ForEach(targets, ParseDoSpecialSrc, (ClientData)&ss); 835 return; 836 } 837 gn = Targ_FindNode(src, TARG_CREATE); 838 if (tOp) { 839 gn->type |= tOp; 840 } else { 841 Lst_ForEach(targets, ParseLinkSrc, (ClientData)gn); 842 } 843 break; 844 } 845 846 if (DEBUG(PARSE)) 847 fprintf(debug_file, "ParseDoSrc: set %p(%s):%d (was %d)\n", 848 gn, gn->name, waiting, gn->order); 849 gn->order = waiting; 850 (void)Lst_AtEnd(allsrc, (ClientData)gn); 851 if (waiting) { 852 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 853 } 854 } 855 856 /*- 857 *----------------------------------------------------------------------- 858 * ParseFindMain -- 859 * Find a real target in the list and set it to be the main one. 860 * Called by ParseDoDependency when a main target hasn't been found 861 * yet. 862 * 863 * Input: 864 * gnp Node to examine 865 * 866 * Results: 867 * 0 if main not found yet, 1 if it is. 868 * 869 * Side Effects: 870 * mainNode is changed and Targ_SetMain is called. 871 * 872 *----------------------------------------------------------------------- 873 */ 874 static int 875 ParseFindMain(ClientData gnp, ClientData dummy) 876 { 877 GNode *gn = (GNode *)gnp; 878 if ((gn->type & OP_NOTARGET) == 0) { 879 mainNode = gn; 880 Targ_SetMain(gn); 881 return (dummy ? 1 : 1); 882 } else { 883 return (dummy ? 0 : 0); 884 } 885 } 886 887 /*- 888 *----------------------------------------------------------------------- 889 * ParseAddDir -- 890 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 891 * 892 * Results: 893 * === 0 894 * 895 * Side Effects: 896 * See Dir_AddDir. 897 * 898 *----------------------------------------------------------------------- 899 */ 900 static int 901 ParseAddDir(ClientData path, ClientData name) 902 { 903 (void)Dir_AddDir((Lst) path, (char *)name); 904 return(0); 905 } 906 907 /*- 908 *----------------------------------------------------------------------- 909 * ParseClearPath -- 910 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 911 * 912 * Results: 913 * === 0 914 * 915 * Side Effects: 916 * See Dir_ClearPath 917 * 918 *----------------------------------------------------------------------- 919 */ 920 static int 921 ParseClearPath(ClientData path, ClientData dummy) 922 { 923 Dir_ClearPath((Lst) path); 924 return(dummy ? 0 : 0); 925 } 926 927 /*- 928 *--------------------------------------------------------------------- 929 * ParseDoDependency -- 930 * Parse the dependency line in line. 931 * 932 * Input: 933 * line the line to parse 934 * 935 * Results: 936 * None 937 * 938 * Side Effects: 939 * The nodes of the sources are linked as children to the nodes of the 940 * targets. Some nodes may be created. 941 * 942 * We parse a dependency line by first extracting words from the line and 943 * finding nodes in the list of all targets with that name. This is done 944 * until a character is encountered which is an operator character. Currently 945 * these are only ! and :. At this point the operator is parsed and the 946 * pointer into the line advanced until the first source is encountered. 947 * The parsed operator is applied to each node in the 'targets' list, 948 * which is where the nodes found for the targets are kept, by means of 949 * the ParseDoOp function. 950 * The sources are read in much the same way as the targets were except 951 * that now they are expanded using the wildcarding scheme of the C-Shell 952 * and all instances of the resulting words in the list of all targets 953 * are found. Each of the resulting nodes is then linked to each of the 954 * targets as one of its children. 955 * Certain targets are handled specially. These are the ones detailed 956 * by the specType variable. 957 * The storing of transformation rules is also taken care of here. 958 * A target is recognized as a transformation rule by calling 959 * Suff_IsTransform. If it is a transformation rule, its node is gotten 960 * from the suffix module via Suff_AddTransform rather than the standard 961 * Targ_FindNode in the target module. 962 *--------------------------------------------------------------------- 963 */ 964 static void 965 ParseDoDependency(char *line) 966 { 967 char *cp; /* our current position */ 968 GNode *gn = NULL; /* a general purpose temporary node */ 969 int op; /* the operator on the line */ 970 char savec; /* a place to save a character */ 971 Lst paths; /* List of search paths to alter when parsing 972 * a list of .PATH targets */ 973 int tOp; /* operator from special target */ 974 Lst sources; /* list of archive source names after 975 * expansion */ 976 Lst curTargs; /* list of target names to be found and added 977 * to the targets list */ 978 Lst curSrcs; /* list of sources in order */ 979 char *lstart = line; 980 Boolean hasWait; /* is .WAIT present in srcs */ 981 982 tOp = 0; 983 984 specType = Not; 985 waiting = 0; 986 paths = (Lst)NULL; 987 988 curTargs = Lst_Init(FALSE); 989 curSrcs = Lst_Init(FALSE); 990 991 do { 992 for (cp = line; 993 *cp && (ParseIsEscaped(lstart, cp) || 994 (!isspace ((unsigned char)*cp) && 995 (*cp != '!') && (*cp != ':') && (*cp != LPAREN))); 996 cp++) 997 { 998 if (*cp == '$') { 999 /* 1000 * Must be a dynamic source (would have been expanded 1001 * otherwise), so call the Var module to parse the puppy 1002 * so we can safely advance beyond it...There should be 1003 * no errors in this, as they would have been discovered 1004 * in the initial Var_Subst and we wouldn't be here. 1005 */ 1006 int length; 1007 void *freeIt; 1008 char *result; 1009 1010 result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 1011 if (freeIt) 1012 free(freeIt); 1013 cp += length-1; 1014 } 1015 continue; 1016 } 1017 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 1018 /* 1019 * Archives must be handled specially to make sure the OP_ARCHV 1020 * flag is set in their 'type' field, for one thing, and because 1021 * things like "archive(file1.o file2.o file3.o)" are permissible. 1022 * Arch_ParseArchive will set 'line' to be the first non-blank 1023 * after the archive-spec. It creates/finds nodes for the members 1024 * and places them on the given list, returning SUCCESS if all 1025 * went well and FAILURE if there was an error in the 1026 * specification. On error, line should remain untouched. 1027 */ 1028 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) { 1029 Parse_Error(PARSE_FATAL, 1030 "Error in archive specification: \"%s\"", line); 1031 goto out; 1032 } else { 1033 continue; 1034 } 1035 } 1036 savec = *cp; 1037 1038 if (!*cp) { 1039 /* 1040 * Ending a dependency line without an operator is a Bozo 1041 * no-no. As a heuristic, this is also often triggered by 1042 * undetected conflicts from cvs/rcs merges. 1043 */ 1044 if ((strncmp(line, "<<<<<<", 6) == 0) || 1045 (strncmp(line, "======", 6) == 0) || 1046 (strncmp(line, ">>>>>>", 6) == 0)) 1047 Parse_Error(PARSE_FATAL, 1048 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 1049 else 1050 Parse_Error(PARSE_FATAL, "Need an operator"); 1051 goto out; 1052 } 1053 *cp = '\0'; 1054 /* 1055 * Have a word in line. See if it's a special target and set 1056 * specType to match it. 1057 */ 1058 if (*line == '.' && isupper ((unsigned char)line[1])) { 1059 /* 1060 * See if the target is a special target that must have it 1061 * or its sources handled specially. 1062 */ 1063 int keywd = ParseFindKeyword(line); 1064 if (keywd != -1) { 1065 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1066 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1067 goto out; 1068 } 1069 1070 specType = parseKeywords[keywd].spec; 1071 tOp = parseKeywords[keywd].op; 1072 1073 /* 1074 * Certain special targets have special semantics: 1075 * .PATH Have to set the dirSearchPath 1076 * variable too 1077 * .MAIN Its sources are only used if 1078 * nothing has been specified to 1079 * create. 1080 * .DEFAULT Need to create a node to hang 1081 * commands on, but we don't want 1082 * it in the graph, nor do we want 1083 * it to be the Main Target, so we 1084 * create it, set OP_NOTMAIN and 1085 * add it to the list, setting 1086 * DEFAULT to the new node for 1087 * later use. We claim the node is 1088 * A transformation rule to make 1089 * life easier later, when we'll 1090 * use Make_HandleUse to actually 1091 * apply the .DEFAULT commands. 1092 * .PHONY The list of targets 1093 * .NOPATH Don't search for file in the path 1094 * .BEGIN 1095 * .END 1096 * .INTERRUPT Are not to be considered the 1097 * main target. 1098 * .NOTPARALLEL Make only one target at a time. 1099 * .SINGLESHELL Create a shell for each command. 1100 * .ORDER Must set initial predecessor to NIL 1101 */ 1102 switch (specType) { 1103 case ExPath: 1104 if (paths == NULL) { 1105 paths = Lst_Init(FALSE); 1106 } 1107 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 1108 break; 1109 case Main: 1110 if (!Lst_IsEmpty(create)) { 1111 specType = Not; 1112 } 1113 break; 1114 case Begin: 1115 case End: 1116 case Interrupt: 1117 gn = Targ_FindNode(line, TARG_CREATE); 1118 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1119 (void)Lst_AtEnd(targets, (ClientData)gn); 1120 break; 1121 case Default: 1122 gn = Targ_NewGN(".DEFAULT"); 1123 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1124 (void)Lst_AtEnd(targets, (ClientData)gn); 1125 DEFAULT = gn; 1126 break; 1127 case NotParallel: 1128 maxJobs = 1; 1129 break; 1130 case SingleShell: 1131 compatMake = TRUE; 1132 break; 1133 case Order: 1134 predecessor = NILGNODE; 1135 break; 1136 default: 1137 break; 1138 } 1139 } else if (strncmp(line, ".PATH", 5) == 0) { 1140 /* 1141 * .PATH<suffix> has to be handled specially. 1142 * Call on the suffix module to give us a path to 1143 * modify. 1144 */ 1145 Lst path; 1146 1147 specType = ExPath; 1148 path = Suff_GetPath(&line[5]); 1149 if (path == NILLST) { 1150 Parse_Error(PARSE_FATAL, 1151 "Suffix '%s' not defined (yet)", 1152 &line[5]); 1153 goto out; 1154 } else { 1155 if (paths == (Lst)NULL) { 1156 paths = Lst_Init(FALSE); 1157 } 1158 (void)Lst_AtEnd(paths, (ClientData)path); 1159 } 1160 } 1161 } 1162 1163 /* 1164 * Have word in line. Get or create its node and stick it at 1165 * the end of the targets list 1166 */ 1167 if ((specType == Not) && (*line != '\0')) { 1168 if (Dir_HasWildcards(line)) { 1169 /* 1170 * Targets are to be sought only in the current directory, 1171 * so create an empty path for the thing. Note we need to 1172 * use Dir_Destroy in the destruction of the path as the 1173 * Dir module could have added a directory to the path... 1174 */ 1175 Lst emptyPath = Lst_Init(FALSE); 1176 1177 Dir_Expand(line, emptyPath, curTargs); 1178 1179 Lst_Destroy(emptyPath, Dir_Destroy); 1180 } else { 1181 /* 1182 * No wildcards, but we want to avoid code duplication, 1183 * so create a list with the word on it. 1184 */ 1185 (void)Lst_AtEnd(curTargs, (ClientData)line); 1186 } 1187 1188 while(!Lst_IsEmpty(curTargs)) { 1189 char *targName = (char *)Lst_DeQueue(curTargs); 1190 1191 if (!Suff_IsTransform (targName)) { 1192 gn = Targ_FindNode(targName, TARG_CREATE); 1193 } else { 1194 gn = Suff_AddTransform(targName); 1195 } 1196 1197 (void)Lst_AtEnd(targets, (ClientData)gn); 1198 } 1199 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1200 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1201 } 1202 1203 *cp = savec; 1204 /* 1205 * If it is a special type and not .PATH, it's the only target we 1206 * allow on this line... 1207 */ 1208 if (specType != Not && specType != ExPath) { 1209 Boolean warning = FALSE; 1210 1211 while (*cp && (ParseIsEscaped(lstart, cp) || 1212 ((*cp != '!') && (*cp != ':')))) { 1213 if (ParseIsEscaped(lstart, cp) || 1214 (*cp != ' ' && *cp != '\t')) { 1215 warning = TRUE; 1216 } 1217 cp++; 1218 } 1219 if (warning) { 1220 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1221 } 1222 } else { 1223 while (*cp && isspace ((unsigned char)*cp)) { 1224 cp++; 1225 } 1226 } 1227 line = cp; 1228 } while (*line && (ParseIsEscaped(lstart, line) || 1229 ((*line != '!') && (*line != ':')))); 1230 1231 /* 1232 * Don't need the list of target names anymore... 1233 */ 1234 Lst_Destroy(curTargs, NOFREE); 1235 curTargs = NULL; 1236 1237 if (!Lst_IsEmpty(targets)) { 1238 switch(specType) { 1239 default: 1240 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1241 break; 1242 case Default: 1243 case Begin: 1244 case End: 1245 case Interrupt: 1246 /* 1247 * These four create nodes on which to hang commands, so 1248 * targets shouldn't be empty... 1249 */ 1250 case Not: 1251 /* 1252 * Nothing special here -- targets can be empty if it wants. 1253 */ 1254 break; 1255 } 1256 } 1257 1258 /* 1259 * Have now parsed all the target names. Must parse the operator next. The 1260 * result is left in op . 1261 */ 1262 if (*cp == '!') { 1263 op = OP_FORCE; 1264 } else if (*cp == ':') { 1265 if (cp[1] == ':') { 1266 op = OP_DOUBLEDEP; 1267 cp++; 1268 } else { 1269 op = OP_DEPENDS; 1270 } 1271 } else { 1272 Parse_Error(PARSE_FATAL, "Missing dependency operator"); 1273 goto out; 1274 } 1275 1276 cp++; /* Advance beyond operator */ 1277 1278 Lst_ForEach(targets, ParseDoOp, (ClientData)&op); 1279 1280 /* 1281 * Get to the first source 1282 */ 1283 while (*cp && isspace ((unsigned char)*cp)) { 1284 cp++; 1285 } 1286 line = cp; 1287 1288 /* 1289 * Several special targets take different actions if present with no 1290 * sources: 1291 * a .SUFFIXES line with no sources clears out all old suffixes 1292 * a .PRECIOUS line makes all targets precious 1293 * a .IGNORE line ignores errors for all targets 1294 * a .SILENT line creates silence when making all targets 1295 * a .PATH removes all directories from the search path(s). 1296 */ 1297 if (!*line) { 1298 switch (specType) { 1299 case Suffixes: 1300 Suff_ClearSuffixes(); 1301 break; 1302 case Precious: 1303 allPrecious = TRUE; 1304 break; 1305 case Ignore: 1306 ignoreErrors = TRUE; 1307 break; 1308 case Silent: 1309 beSilent = TRUE; 1310 break; 1311 case ExPath: 1312 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1313 Dir_SetPATH(); 1314 break; 1315 #ifdef POSIX 1316 case Posix: 1317 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1318 break; 1319 #endif 1320 default: 1321 break; 1322 } 1323 } else if (specType == MFlags) { 1324 /* 1325 * Call on functions in main.c to deal with these arguments and 1326 * set the initial character to a null-character so the loop to 1327 * get sources won't get anything 1328 */ 1329 Main_ParseArgLine(line); 1330 *line = '\0'; 1331 } else if (specType == ExShell) { 1332 if (Job_ParseShell(line) != SUCCESS) { 1333 Parse_Error(PARSE_FATAL, "improper shell specification"); 1334 goto out; 1335 } 1336 *line = '\0'; 1337 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1338 *line = '\0'; 1339 } 1340 1341 /* 1342 * NOW GO FOR THE SOURCES 1343 */ 1344 if ((specType == Suffixes) || (specType == ExPath) || 1345 (specType == Includes) || (specType == Libs) || 1346 (specType == Null) || (specType == ExObjdir)) 1347 { 1348 while (*line) { 1349 /* 1350 * If the target was one that doesn't take files as its sources 1351 * but takes something like suffixes, we take each 1352 * space-separated word on the line as a something and deal 1353 * with it accordingly. 1354 * 1355 * If the target was .SUFFIXES, we take each source as a 1356 * suffix and add it to the list of suffixes maintained by the 1357 * Suff module. 1358 * 1359 * If the target was a .PATH, we add the source as a directory 1360 * to search on the search path. 1361 * 1362 * If it was .INCLUDES, the source is taken to be the suffix of 1363 * files which will be #included and whose search path should 1364 * be present in the .INCLUDES variable. 1365 * 1366 * If it was .LIBS, the source is taken to be the suffix of 1367 * files which are considered libraries and whose search path 1368 * should be present in the .LIBS variable. 1369 * 1370 * If it was .NULL, the source is the suffix to use when a file 1371 * has no valid suffix. 1372 * 1373 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1374 * and will cause make to do a new chdir to that path. 1375 */ 1376 while (*cp && !isspace ((unsigned char)*cp)) { 1377 cp++; 1378 } 1379 savec = *cp; 1380 *cp = '\0'; 1381 switch (specType) { 1382 case Suffixes: 1383 Suff_AddSuffix(line, &mainNode); 1384 break; 1385 case ExPath: 1386 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1387 break; 1388 case Includes: 1389 Suff_AddInclude(line); 1390 break; 1391 case Libs: 1392 Suff_AddLib(line); 1393 break; 1394 case Null: 1395 Suff_SetNull(line); 1396 break; 1397 case ExObjdir: 1398 Main_SetObjdir(line); 1399 break; 1400 default: 1401 break; 1402 } 1403 *cp = savec; 1404 if (savec != '\0') { 1405 cp++; 1406 } 1407 while (*cp && isspace ((unsigned char)*cp)) { 1408 cp++; 1409 } 1410 line = cp; 1411 } 1412 if (paths) { 1413 Lst_Destroy(paths, NOFREE); 1414 } 1415 if (specType == ExPath) 1416 Dir_SetPATH(); 1417 } else { 1418 /* 1419 * We don't need ParseDoSpecialSrc unless .WAIT is present. 1420 */ 1421 hasWait = (strstr(line, ".WAIT") != NULL); 1422 1423 while (*line) { 1424 /* 1425 * The targets take real sources, so we must beware of archive 1426 * specifications (i.e. things with left parentheses in them) 1427 * and handle them accordingly. 1428 */ 1429 while (*cp && !isspace ((unsigned char)*cp)) { 1430 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1431 /* 1432 * Only stop for a left parenthesis if it isn't at the 1433 * start of a word (that'll be for variable changes 1434 * later) and isn't preceded by a dollar sign (a dynamic 1435 * source). 1436 */ 1437 break; 1438 } else { 1439 cp++; 1440 } 1441 } 1442 1443 if (*cp == LPAREN) { 1444 sources = Lst_Init(FALSE); 1445 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) { 1446 Parse_Error(PARSE_FATAL, 1447 "Error in source archive spec \"%s\"", line); 1448 goto out; 1449 } 1450 1451 while (!Lst_IsEmpty (sources)) { 1452 gn = (GNode *)Lst_DeQueue(sources); 1453 ParseDoSrc(tOp, gn->name, curSrcs, hasWait); 1454 } 1455 Lst_Destroy(sources, NOFREE); 1456 cp = line; 1457 } else { 1458 if (*cp) { 1459 *cp = '\0'; 1460 cp += 1; 1461 } 1462 1463 ParseDoSrc(tOp, line, curSrcs, hasWait); 1464 } 1465 while (*cp && isspace ((unsigned char)*cp)) { 1466 cp++; 1467 } 1468 line = cp; 1469 } 1470 } 1471 1472 if (mainNode == NILGNODE) { 1473 /* 1474 * If we have yet to decide on a main target to make, in the 1475 * absence of any user input, we want the first target on 1476 * the first dependency line that is actually a real target 1477 * (i.e. isn't a .USE or .EXEC rule) to be made. 1478 */ 1479 Lst_ForEach(targets, ParseFindMain, (ClientData)0); 1480 } 1481 1482 out: 1483 if (curTargs) 1484 Lst_Destroy(curTargs, NOFREE); 1485 /* 1486 * Finally, destroy the list of sources 1487 */ 1488 Lst_Destroy(curSrcs, NOFREE); 1489 } 1490 1491 /*- 1492 *--------------------------------------------------------------------- 1493 * Parse_IsVar -- 1494 * Return TRUE if the passed line is a variable assignment. A variable 1495 * assignment consists of a single word followed by optional whitespace 1496 * followed by either a += or an = operator. 1497 * This function is used both by the Parse_File function and main when 1498 * parsing the command-line arguments. 1499 * 1500 * Input: 1501 * line the line to check 1502 * 1503 * Results: 1504 * TRUE if it is. FALSE if it ain't 1505 * 1506 * Side Effects: 1507 * none 1508 *--------------------------------------------------------------------- 1509 */ 1510 Boolean 1511 Parse_IsVar(char *line) 1512 { 1513 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1514 Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1515 int level = 0; 1516 #define ISEQOPERATOR(c) \ 1517 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1518 1519 /* 1520 * Skip to variable name 1521 */ 1522 for (;(*line == ' ') || (*line == '\t'); line++) 1523 continue; 1524 1525 for (; *line != '=' || level != 0; line++) 1526 switch (*line) { 1527 case '\0': 1528 /* 1529 * end-of-line -- can't be a variable assignment. 1530 */ 1531 return FALSE; 1532 1533 case ' ': 1534 case '\t': 1535 /* 1536 * there can be as much white space as desired so long as there is 1537 * only one word before the operator 1538 */ 1539 wasSpace = TRUE; 1540 break; 1541 1542 case LPAREN: 1543 case '{': 1544 level++; 1545 break; 1546 1547 case '}': 1548 case RPAREN: 1549 level--; 1550 break; 1551 1552 default: 1553 if (wasSpace && haveName) { 1554 if (ISEQOPERATOR(*line)) { 1555 /* 1556 * We must have a finished word 1557 */ 1558 if (level != 0) 1559 return FALSE; 1560 1561 /* 1562 * When an = operator [+?!:] is found, the next 1563 * character must be an = or it ain't a valid 1564 * assignment. 1565 */ 1566 if (line[1] == '=') 1567 return haveName; 1568 #ifdef SUNSHCMD 1569 /* 1570 * This is a shell command 1571 */ 1572 if (strncmp(line, ":sh", 3) == 0) 1573 return haveName; 1574 #endif 1575 } 1576 /* 1577 * This is the start of another word, so not assignment. 1578 */ 1579 return FALSE; 1580 } 1581 else { 1582 haveName = TRUE; 1583 wasSpace = FALSE; 1584 } 1585 break; 1586 } 1587 1588 return haveName; 1589 } 1590 1591 /*- 1592 *--------------------------------------------------------------------- 1593 * Parse_DoVar -- 1594 * Take the variable assignment in the passed line and do it in the 1595 * global context. 1596 * 1597 * Note: There is a lexical ambiguity with assignment modifier characters 1598 * in variable names. This routine interprets the character before the = 1599 * as a modifier. Therefore, an assignment like 1600 * C++=/usr/bin/CC 1601 * is interpreted as "C+ +=" instead of "C++ =". 1602 * 1603 * Input: 1604 * line a line guaranteed to be a variable assignment. 1605 * This reduces error checks 1606 * ctxt Context in which to do the assignment 1607 * 1608 * Results: 1609 * none 1610 * 1611 * Side Effects: 1612 * the variable structure of the given variable name is altered in the 1613 * global context. 1614 *--------------------------------------------------------------------- 1615 */ 1616 void 1617 Parse_DoVar(char *line, GNode *ctxt) 1618 { 1619 char *cp; /* pointer into line */ 1620 enum { 1621 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1622 } type; /* Type of assignment */ 1623 char *opc; /* ptr to operator character to 1624 * null-terminate the variable name */ 1625 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1626 * i.e. if any variable expansion was 1627 * performed */ 1628 /* 1629 * Avoid clobbered variable warnings by forcing the compiler 1630 * to ``unregister'' variables 1631 */ 1632 #if __GNUC__ 1633 (void) &cp; 1634 (void) &line; 1635 #endif 1636 1637 /* 1638 * Skip to variable name 1639 */ 1640 while ((*line == ' ') || (*line == '\t')) { 1641 line++; 1642 } 1643 1644 /* 1645 * Skip to operator character, nulling out whitespace as we go 1646 */ 1647 for (cp = line + 1; *cp != '='; cp++) { 1648 if (isspace ((unsigned char)*cp)) { 1649 *cp = '\0'; 1650 } 1651 } 1652 opc = cp-1; /* operator is the previous character */ 1653 *cp++ = '\0'; /* nuke the = */ 1654 1655 /* 1656 * Check operator type 1657 */ 1658 switch (*opc) { 1659 case '+': 1660 type = VAR_APPEND; 1661 *opc = '\0'; 1662 break; 1663 1664 case '?': 1665 /* 1666 * If the variable already has a value, we don't do anything. 1667 */ 1668 *opc = '\0'; 1669 if (Var_Exists(line, ctxt)) { 1670 return; 1671 } else { 1672 type = VAR_NORMAL; 1673 } 1674 break; 1675 1676 case ':': 1677 type = VAR_SUBST; 1678 *opc = '\0'; 1679 break; 1680 1681 case '!': 1682 type = VAR_SHELL; 1683 *opc = '\0'; 1684 break; 1685 1686 default: 1687 #ifdef SUNSHCMD 1688 while (opc > line && *opc != ':') 1689 opc--; 1690 1691 if (strncmp(opc, ":sh", 3) == 0) { 1692 type = VAR_SHELL; 1693 *opc = '\0'; 1694 break; 1695 } 1696 #endif 1697 type = VAR_NORMAL; 1698 break; 1699 } 1700 1701 while (isspace ((unsigned char)*cp)) { 1702 cp++; 1703 } 1704 1705 if (type == VAR_APPEND) { 1706 Var_Append(line, cp, ctxt); 1707 } else if (type == VAR_SUBST) { 1708 /* 1709 * Allow variables in the old value to be undefined, but leave their 1710 * invocation alone -- this is done by forcing oldVars to be false. 1711 * XXX: This can cause recursive variables, but that's not hard to do, 1712 * and this allows someone to do something like 1713 * 1714 * CFLAGS = $(.INCLUDES) 1715 * CFLAGS := -I.. $(CFLAGS) 1716 * 1717 * And not get an error. 1718 */ 1719 Boolean oldOldVars = oldVars; 1720 1721 oldVars = FALSE; 1722 1723 /* 1724 * make sure that we set the variable the first time to nothing 1725 * so that it gets substituted! 1726 */ 1727 if (!Var_Exists(line, ctxt)) 1728 Var_Set(line, "", ctxt, 0); 1729 1730 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1731 oldVars = oldOldVars; 1732 freeCp = TRUE; 1733 1734 Var_Set(line, cp, ctxt, 0); 1735 } else if (type == VAR_SHELL) { 1736 char *res; 1737 const char *error; 1738 1739 if (strchr(cp, '$') != NULL) { 1740 /* 1741 * There's a dollar sign in the command, so perform variable 1742 * expansion on the whole thing. The resulting string will need 1743 * freeing when we're done, so set freeCmd to TRUE. 1744 */ 1745 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1746 freeCp = TRUE; 1747 } 1748 1749 res = Cmd_Exec(cp, &error); 1750 Var_Set(line, res, ctxt, 0); 1751 free(res); 1752 1753 if (error) 1754 Parse_Error(PARSE_WARNING, error, cp); 1755 } else { 1756 /* 1757 * Normal assignment -- just do it. 1758 */ 1759 Var_Set(line, cp, ctxt, 0); 1760 } 1761 if (strcmp(line, MAKEOVERRIDES) == 0) 1762 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1763 else if (strcmp(line, ".CURDIR") == 0) { 1764 /* 1765 * Somone is being (too?) clever... 1766 * Let's pretend they know what they are doing and 1767 * re-initialize the 'cur' Path. 1768 */ 1769 Dir_InitCur(cp); 1770 Dir_SetPATH(); 1771 } 1772 if (freeCp) 1773 free(cp); 1774 } 1775 1776 1777 /*- 1778 * ParseAddCmd -- 1779 * Lst_ForEach function to add a command line to all targets 1780 * 1781 * Input: 1782 * gnp the node to which the command is to be added 1783 * cmd the command to add 1784 * 1785 * Results: 1786 * Always 0 1787 * 1788 * Side Effects: 1789 * A new element is added to the commands list of the node. 1790 */ 1791 static int 1792 ParseAddCmd(ClientData gnp, ClientData cmd) 1793 { 1794 GNode *gn = (GNode *)gnp; 1795 /* if target already supplied, ignore commands */ 1796 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1797 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts)); 1798 if (!(gn->type & OP_HAS_COMMANDS)) { 1799 (void)Lst_AtEnd(gn->commands, cmd); 1800 ParseMark(gn); 1801 } else { 1802 #ifdef notyet 1803 /* XXX: We cannot do this until we fix the tree */ 1804 (void)Lst_AtEnd(gn->commands, cmd); 1805 Parse_Error(PARSE_WARNING, 1806 "overriding commands for target \"%s\"; " 1807 "previous commands defined at %s: %d ignored", 1808 gn->name, gn->fname, gn->lineno); 1809 #else 1810 Parse_Error(PARSE_WARNING, 1811 "duplicate script for target \"%s\" ignored", 1812 gn->name); 1813 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 1814 "using previous script for \"%s\" defined here", 1815 gn->name); 1816 #endif 1817 } 1818 return(0); 1819 } 1820 1821 /*- 1822 *----------------------------------------------------------------------- 1823 * ParseHasCommands -- 1824 * Callback procedure for Parse_File when destroying the list of 1825 * targets on the last dependency line. Marks a target as already 1826 * having commands if it does, to keep from having shell commands 1827 * on multiple dependency lines. 1828 * 1829 * Input: 1830 * gnp Node to examine 1831 * 1832 * Results: 1833 * None 1834 * 1835 * Side Effects: 1836 * OP_HAS_COMMANDS may be set for the target. 1837 * 1838 *----------------------------------------------------------------------- 1839 */ 1840 static void 1841 ParseHasCommands(ClientData gnp) 1842 { 1843 GNode *gn = (GNode *)gnp; 1844 if (!Lst_IsEmpty(gn->commands)) { 1845 gn->type |= OP_HAS_COMMANDS; 1846 } 1847 } 1848 1849 /*- 1850 *----------------------------------------------------------------------- 1851 * Parse_AddIncludeDir -- 1852 * Add a directory to the path searched for included makefiles 1853 * bracketed by double-quotes. Used by functions in main.c 1854 * 1855 * Input: 1856 * dir The name of the directory to add 1857 * 1858 * Results: 1859 * None. 1860 * 1861 * Side Effects: 1862 * The directory is appended to the list. 1863 * 1864 *----------------------------------------------------------------------- 1865 */ 1866 void 1867 Parse_AddIncludeDir(char *dir) 1868 { 1869 (void)Dir_AddDir(parseIncPath, dir); 1870 } 1871 1872 /*- 1873 *--------------------------------------------------------------------- 1874 * ParseDoInclude -- 1875 * Push to another file. 1876 * 1877 * The input is the line minus the `.'. A file spec is a string 1878 * enclosed in <> or "". The former is looked for only in sysIncPath. 1879 * The latter in . and the directories specified by -I command line 1880 * options 1881 * 1882 * Results: 1883 * None 1884 * 1885 * Side Effects: 1886 * A structure is added to the includes Lst and readProc, lineno, 1887 * fname and curFILE are altered for the new file 1888 *--------------------------------------------------------------------- 1889 */ 1890 static void 1891 ParseDoInclude(char *line) 1892 { 1893 char *fullname; /* full pathname of file */ 1894 IFile *oldFile; /* state associated with current file */ 1895 char endc; /* the character which ends the file spec */ 1896 char *cp; /* current position in file spec */ 1897 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1898 int silent = (*line != 'i') ? 1 : 0; 1899 char *file = &line[7 + silent]; 1900 1901 /* 1902 * Skip to delimiter character so we know where to look 1903 */ 1904 while ((*file == ' ') || (*file == '\t')) { 1905 file++; 1906 } 1907 1908 if ((*file != '"') && (*file != '<')) { 1909 Parse_Error(PARSE_FATAL, 1910 ".include filename must be delimited by '\"' or '<'"); 1911 return; 1912 } 1913 1914 /* 1915 * Set the search path on which to find the include file based on the 1916 * characters which bracket its name. Angle-brackets imply it's 1917 * a system Makefile while double-quotes imply it's a user makefile 1918 */ 1919 if (*file == '<') { 1920 isSystem = TRUE; 1921 endc = '>'; 1922 } else { 1923 isSystem = FALSE; 1924 endc = '"'; 1925 } 1926 1927 /* 1928 * Skip to matching delimiter 1929 */ 1930 for (cp = ++file; *cp && *cp != endc; cp++) { 1931 continue; 1932 } 1933 1934 if (*cp != endc) { 1935 Parse_Error(PARSE_FATAL, 1936 "Unclosed %cinclude filename. '%c' expected", 1937 '.', endc); 1938 return; 1939 } 1940 *cp = '\0'; 1941 1942 /* 1943 * Substitute for any variables in the file name before trying to 1944 * find the thing. 1945 */ 1946 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 1947 1948 /* 1949 * Now we know the file's name and its search path, we attempt to 1950 * find the durn thing. A return of NULL indicates the file don't 1951 * exist. 1952 */ 1953 fullname = NULL; 1954 1955 if (!isSystem) { 1956 /* 1957 * Include files contained in double-quotes are first searched for 1958 * relative to the including file's location. We don't want to 1959 * cd there, of course, so we just tack on the old file's 1960 * leading path components and call Dir_FindFile to see if 1961 * we can locate the beast. 1962 */ 1963 char *prefEnd, *Fname; 1964 1965 /* Make a temporary copy of this, to be safe. */ 1966 Fname = estrdup(curFile.fname); 1967 1968 prefEnd = strrchr(Fname, '/'); 1969 if (prefEnd != NULL) { 1970 char *newName; 1971 1972 *prefEnd = '\0'; 1973 if (file[0] == '/') 1974 newName = estrdup(file); 1975 else 1976 newName = str_concat(Fname, file, STR_ADDSLASH); 1977 fullname = Dir_FindFile(newName, parseIncPath); 1978 if (fullname == NULL) { 1979 fullname = Dir_FindFile(newName, dirSearchPath); 1980 } 1981 free(newName); 1982 *prefEnd = '/'; 1983 } else { 1984 fullname = NULL; 1985 } 1986 free(Fname); 1987 if (fullname == NULL) { 1988 /* 1989 * Makefile wasn't found in same directory as included makefile. 1990 * Search for it first on the -I search path, 1991 * then on the .PATH search path, if not found in a -I directory. 1992 * XXX: Suffix specific? 1993 */ 1994 fullname = Dir_FindFile(file, parseIncPath); 1995 if (fullname == NULL) { 1996 fullname = Dir_FindFile(file, dirSearchPath); 1997 } 1998 } 1999 } 2000 2001 /* Looking for a system file or file still not found */ 2002 if (fullname == NULL) { 2003 /* 2004 * Look for it on the system path 2005 */ 2006 fullname = Dir_FindFile(file, Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2007 } 2008 2009 if (fullname == NULL) { 2010 *cp = endc; 2011 if (!silent) 2012 Parse_Error(PARSE_FATAL, "Could not find %s", file); 2013 return; 2014 } 2015 2016 free(file); 2017 2018 /* 2019 * Once we find the absolute path to the file, we get to save all the 2020 * state from the current file before we can start reading this 2021 * include file. The state is stored in an IFile structure which 2022 * is placed on a list with other IFile structures. The list makes 2023 * a very nice stack to track how we got here... 2024 */ 2025 oldFile = emalloc(sizeof(IFile)); 2026 2027 memcpy(oldFile, &curFile, sizeof(IFile)); 2028 2029 (void)Lst_AtFront(includes, (ClientData)oldFile); 2030 2031 /* 2032 * Once the previous state has been saved, we can get down to reading 2033 * the new file. We set up the name of the file to be the absolute 2034 * name of the include file so error messages refer to the right 2035 * place. Naturally enough, we start reading at line number 0. 2036 */ 2037 curFile.fname = fullname; 2038 curFile.lineno = 0; 2039 2040 ParseSetParseFile(curFile.fname); 2041 2042 curFile.F = fopen(fullname, "r"); 2043 curFile.P = NULL; 2044 2045 if (curFile.F == (FILE * ) NULL) { 2046 if (!silent) 2047 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 2048 /* 2049 * Pop to previous file 2050 */ 2051 (void)ParseEOF(0); 2052 } 2053 } 2054 2055 2056 /*- 2057 *--------------------------------------------------------------------- 2058 * ParseSetParseFile -- 2059 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2060 * basename of the given filename 2061 * 2062 * Results: 2063 * None 2064 * 2065 * Side Effects: 2066 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2067 * dirname and basename of the given filename. 2068 *--------------------------------------------------------------------- 2069 */ 2070 static void 2071 ParseSetParseFile(char *filename) 2072 { 2073 char *slash; 2074 2075 slash = strrchr(filename, '/'); 2076 if (slash == 0) { 2077 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 2078 Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0); 2079 } else { 2080 *slash = '\0'; 2081 Var_Set(".PARSEDIR", filename, VAR_GLOBAL, 0); 2082 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 2083 *slash = '/'; 2084 } 2085 } 2086 2087 2088 /*- 2089 *--------------------------------------------------------------------- 2090 * Parse_FromString -- 2091 * Start Parsing from the given string 2092 * 2093 * Results: 2094 * None 2095 * 2096 * Side Effects: 2097 * A structure is added to the includes Lst and readProc, lineno, 2098 * fname and curFILE are altered for the new file 2099 *--------------------------------------------------------------------- 2100 */ 2101 void 2102 Parse_FromString(char *str, int lineno) 2103 { 2104 IFile *oldFile; /* state associated with this file */ 2105 2106 if (DEBUG(FOR)) 2107 (void)fprintf(debug_file, "%s\n---- at line %d\n", str, lineno); 2108 2109 oldFile = emalloc(sizeof(IFile)); 2110 memcpy(oldFile, &curFile, sizeof(IFile)); 2111 2112 (void)Lst_AtFront(includes, (ClientData)oldFile); 2113 2114 curFile.F = NULL; 2115 curFile.P = emalloc(sizeof(PTR)); 2116 curFile.P->str = curFile.P->ptr = str; 2117 curFile.lineno = lineno; 2118 curFile.fname = estrdup(curFile.fname); 2119 } 2120 2121 2122 #ifdef SYSVINCLUDE 2123 /*- 2124 *--------------------------------------------------------------------- 2125 * ParseTraditionalInclude -- 2126 * Push to another file. 2127 * 2128 * The input is the current line. The file name(s) are 2129 * following the "include". 2130 * 2131 * Results: 2132 * None 2133 * 2134 * Side Effects: 2135 * A structure is added to the includes Lst and readProc, lineno, 2136 * fname and curFILE are altered for the new file 2137 *--------------------------------------------------------------------- 2138 */ 2139 static void 2140 ParseTraditionalInclude(char *line) 2141 { 2142 char *fullname; /* full pathname of file */ 2143 IFile *oldFile; /* state associated with current file */ 2144 char *cp; /* current position in file spec */ 2145 char *prefEnd; 2146 int done = 0; 2147 int silent = (line[0] != 'i') ? 1 : 0; 2148 char *file = &line[silent + 7]; 2149 char *cfname; 2150 size_t clineno; 2151 2152 cfname = curFile.fname; 2153 clineno = curFile.lineno; 2154 2155 if (DEBUG(PARSE)) { 2156 fprintf(debug_file, "ParseTraditionalInclude: %s\n", file); 2157 } 2158 2159 /* 2160 * Skip over whitespace 2161 */ 2162 while (isspace((unsigned char)*file)) 2163 file++; 2164 2165 /* 2166 * Substitute for any variables in the file name before trying to 2167 * find the thing. 2168 */ 2169 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 2170 2171 if (*file == '\0') { 2172 Parse_Error(PARSE_FATAL, 2173 "Filename missing from \"include\""); 2174 return; 2175 } 2176 2177 for (; !done; file = cp + 1) { 2178 /* 2179 * Skip to end of line or next whitespace 2180 */ 2181 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2182 continue; 2183 2184 if (*cp) 2185 *cp = '\0'; 2186 else 2187 done = 1; 2188 2189 /* 2190 * Now we know the file's name, we attempt to find the durn thing. 2191 * A return of NULL indicates the file don't exist. 2192 * 2193 * Include files are first searched for relative to the including 2194 * file's location. We don't want to cd there, of course, so we 2195 * just tack on the old file's leading path components and call 2196 * Dir_FindFile to see if we can locate the beast. 2197 * XXX - this *does* search in the current directory, right? 2198 */ 2199 2200 prefEnd = strrchr(cfname, '/'); 2201 if (prefEnd != NULL) { 2202 char *newName; 2203 2204 *prefEnd = '\0'; 2205 newName = str_concat(cfname, file, STR_ADDSLASH); 2206 fullname = Dir_FindFile(newName, parseIncPath); 2207 if (fullname == NULL) { 2208 fullname = Dir_FindFile(newName, dirSearchPath); 2209 } 2210 free(newName); 2211 *prefEnd = '/'; 2212 } else { 2213 fullname = NULL; 2214 } 2215 2216 if (fullname == NULL) { 2217 /* 2218 * System makefile or makefile wasn't found in same directory as 2219 * included makefile. Search for it first on the -I search path, 2220 * then on the .PATH search path, if not found in a 2221 * -I directory. XXX: Suffix specific? 2222 */ 2223 fullname = Dir_FindFile(file, parseIncPath); 2224 if (fullname == NULL) { 2225 fullname = Dir_FindFile(file, dirSearchPath); 2226 } 2227 } 2228 2229 if (fullname == NULL) { 2230 /* 2231 * Still haven't found the makefile. Look for it on the system 2232 * path as a last resort. 2233 */ 2234 fullname = Dir_FindFile(file, 2235 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2236 } 2237 2238 if (fullname == NULL) { 2239 if (!silent) 2240 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2241 "Could not find %s", file); 2242 free(file); 2243 continue; 2244 } 2245 2246 free(file); 2247 2248 /* 2249 * Once we find the absolute path to the file, we get to save all 2250 * the state from the current file before we can start reading this 2251 * include file. The state is stored in an IFile structure which 2252 * is placed on a list with other IFile structures. The list makes 2253 * a very nice stack to track how we got here... 2254 */ 2255 oldFile = emalloc(sizeof(IFile)); 2256 memcpy(oldFile, &curFile, sizeof(IFile)); 2257 2258 (void)Lst_AtFront(includes, (ClientData)oldFile); 2259 2260 /* 2261 * Once the previous state has been saved, we can get down to 2262 * reading the new file. We set up the name of the file to be the 2263 * absolute name of the include file so error messages refer to the 2264 * right place. Naturally enough, we start reading at line number 0. 2265 */ 2266 curFile.fname = fullname; 2267 curFile.lineno = 0; 2268 2269 curFile.F = fopen(fullname, "r"); 2270 curFile.P = NULL; 2271 2272 if (curFile.F == NULL) { 2273 if (!silent) 2274 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2275 "Cannot open %s", fullname); 2276 /* 2277 * Pop to previous file 2278 */ 2279 (void)ParseEOF(1); 2280 } 2281 } 2282 } 2283 #endif 2284 2285 /*- 2286 *--------------------------------------------------------------------- 2287 * ParseEOF -- 2288 * Called when EOF is reached in the current file. If we were reading 2289 * an include file, the includes stack is popped and things set up 2290 * to go back to reading the previous file at the previous location. 2291 * 2292 * Results: 2293 * CONTINUE if there's more to do. DONE if not. 2294 * 2295 * Side Effects: 2296 * The old curFILE, is closed. The includes list is shortened. 2297 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2298 *--------------------------------------------------------------------- 2299 */ 2300 static int 2301 ParseEOF(int opened) 2302 { 2303 IFile *ifile; /* the state on the top of the includes stack */ 2304 2305 if (Lst_IsEmpty(includes)) { 2306 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2307 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2308 return (DONE); 2309 } 2310 2311 ifile = (IFile *)Lst_DeQueue(includes); 2312 2313 /* XXX dispose of curFile info */ 2314 free( curFile.fname); 2315 if (opened && curFile.F) 2316 (void)fclose(curFile.F); 2317 if (curFile.P) { 2318 free(curFile.P->str); 2319 free(curFile.P); 2320 } 2321 2322 memcpy(&curFile, ifile, sizeof(IFile)); 2323 2324 free(ifile); 2325 2326 /* pop the PARSEDIR/PARSEFILE variables */ 2327 ParseSetParseFile(curFile.fname); 2328 return (CONTINUE); 2329 } 2330 2331 /*- 2332 *--------------------------------------------------------------------- 2333 * ParseReadc -- 2334 * Read a character from the current file 2335 * 2336 * Results: 2337 * The character that was read 2338 * 2339 * Side Effects: 2340 *--------------------------------------------------------------------- 2341 */ 2342 static inline int 2343 ParseReadc(void) 2344 { 2345 if (curFile.F) 2346 return fgetc(curFile.F); 2347 2348 if (curFile.P && *curFile.P->ptr) 2349 return *curFile.P->ptr++; 2350 return EOF; 2351 } 2352 2353 2354 /*- 2355 *--------------------------------------------------------------------- 2356 * ParseUnreadc -- 2357 * Put back a character to the current file 2358 * 2359 * Results: 2360 * None. 2361 * 2362 * Side Effects: 2363 *--------------------------------------------------------------------- 2364 */ 2365 static void 2366 ParseUnreadc(int c) 2367 { 2368 if (curFile.F) { 2369 ungetc(c, curFile.F); 2370 return; 2371 } 2372 if (curFile.P) { 2373 *--(curFile.P->ptr) = c; 2374 return; 2375 } 2376 } 2377 2378 2379 /* ParseSkipLine(): 2380 * Grab the next line 2381 * 2382 * Input: 2383 * skip Skip lines that don't start with . 2384 * keep_newline Keep newline character as is. 2385 * 2386 */ 2387 static char * 2388 ParseSkipLine(int skip, int keep_newline) 2389 { 2390 char *line; 2391 int c, lastc, lineLength = 0; 2392 Buffer buf; 2393 2394 buf = Buf_Init(MAKE_BSIZE); 2395 2396 do { 2397 Buf_Discard(buf, lineLength); 2398 lastc = '\0'; 2399 2400 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2401 && c != EOF) { 2402 if (c == '\n') { 2403 if (keep_newline) 2404 Buf_AddByte(buf, (Byte)c); 2405 else 2406 Buf_ReplaceLastByte(buf, (Byte)' '); 2407 curFile.lineno++; 2408 2409 while ((c = ParseReadc()) == ' ' || c == '\t'); 2410 2411 if (c == EOF) 2412 break; 2413 } 2414 2415 Buf_AddByte(buf, (Byte)c); 2416 lastc = c; 2417 } 2418 2419 if (c == EOF) { 2420 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2421 Buf_Destroy(buf, TRUE); 2422 return(NULL); 2423 } 2424 2425 curFile.lineno++; 2426 Buf_AddByte(buf, (Byte)'\0'); 2427 line = (char *)Buf_GetAll(buf, &lineLength); 2428 } while (skip == 1 && line[0] != '.'); 2429 2430 Buf_Destroy(buf, FALSE); 2431 return line; 2432 } 2433 2434 2435 /*- 2436 *--------------------------------------------------------------------- 2437 * ParseReadLine -- 2438 * Read an entire line from the input file. Called only by Parse_File. 2439 * To facilitate escaped newlines and what have you, a character is 2440 * buffered in 'lastc', which is '\0' when no characters have been 2441 * read. When we break out of the loop, c holds the terminating 2442 * character and lastc holds a character that should be added to 2443 * the line (unless we don't read anything but a terminator). 2444 * 2445 * Results: 2446 * A line w/o its newline 2447 * 2448 * Side Effects: 2449 * Only those associated with reading a character 2450 *--------------------------------------------------------------------- 2451 */ 2452 static char * 2453 ParseReadLine(void) 2454 { 2455 Buffer buf; /* Buffer for current line */ 2456 int c; /* the current character */ 2457 int lastc; /* The most-recent character */ 2458 Boolean semiNL; /* treat semi-colons as newlines */ 2459 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2460 * for the purposes of setting semiNL */ 2461 Boolean ignComment; /* TRUE if should ignore comments (in a 2462 * shell command */ 2463 char *line; /* Result */ 2464 char *ep; /* to strip trailing blanks */ 2465 int lineLength; /* Length of result */ 2466 int lineno; /* Saved line # */ 2467 2468 semiNL = FALSE; 2469 ignDepOp = FALSE; 2470 ignComment = FALSE; 2471 2472 /* 2473 * Handle special-characters at the beginning of the line. Either a 2474 * leading tab (shell command) or pound-sign (possible conditional) 2475 * forces us to ignore comments and dependency operators and treat 2476 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2477 * discards completely blank lines. 2478 */ 2479 for (;;) { 2480 c = ParseReadc(); 2481 2482 if (c == '\t') { 2483 ignComment = ignDepOp = TRUE; 2484 break; 2485 } else if (c == '\n') { 2486 curFile.lineno++; 2487 } else if (c == '#') { 2488 ParseUnreadc(c); 2489 break; 2490 } else { 2491 /* 2492 * Anything else breaks out without doing anything 2493 */ 2494 break; 2495 } 2496 } 2497 2498 if (c != EOF) { 2499 lastc = c; 2500 buf = Buf_Init(MAKE_BSIZE); 2501 2502 while (((c = ParseReadc()) != '\n' || (lastc == '\\')) && 2503 (c != EOF)) 2504 { 2505 test_char: 2506 switch(c) { 2507 case '\n': 2508 /* 2509 * Escaped newline: read characters until a non-space or an 2510 * unescaped newline and replace them all by a single space. 2511 * This is done by storing the space over the backslash and 2512 * dropping through with the next nonspace. If it is a 2513 * semi-colon and semiNL is TRUE, it will be recognized as a 2514 * newline in the code below this... 2515 */ 2516 curFile.lineno++; 2517 lastc = ' '; 2518 while ((c = ParseReadc()) == ' ' || c == '\t') { 2519 continue; 2520 } 2521 if (c == EOF || c == '\n') { 2522 goto line_read; 2523 } else { 2524 /* 2525 * Check for comments, semiNL's, etc. -- easier than 2526 * ParseUnreadc(c); continue; 2527 */ 2528 goto test_char; 2529 } 2530 /*NOTREACHED*/ 2531 break; 2532 2533 case ';': 2534 /* 2535 * Semi-colon: Need to see if it should be interpreted as a 2536 * newline 2537 */ 2538 if (semiNL) { 2539 /* 2540 * To make sure the command that may be following this 2541 * semi-colon begins with a tab, we push one back into the 2542 * input stream. This will overwrite the semi-colon in the 2543 * buffer. If there is no command following, this does no 2544 * harm, since the newline remains in the buffer and the 2545 * whole line is ignored. 2546 */ 2547 ParseUnreadc('\t'); 2548 goto line_read; 2549 } 2550 break; 2551 case '=': 2552 if (!semiNL) { 2553 /* 2554 * Haven't seen a dependency operator before this, so this 2555 * must be a variable assignment -- don't pay attention to 2556 * dependency operators after this. 2557 */ 2558 ignDepOp = TRUE; 2559 } else if (lastc == ':' || lastc == '!') { 2560 /* 2561 * Well, we've seen a dependency operator already, but it 2562 * was the previous character, so this is really just an 2563 * expanded variable assignment. Revert semi-colons to 2564 * being just semi-colons again and ignore any more 2565 * dependency operators. 2566 * 2567 * XXX: Note that a line like "foo : a:=b" will blow up, 2568 * but who'd write a line like that anyway? 2569 */ 2570 ignDepOp = TRUE; semiNL = FALSE; 2571 } 2572 break; 2573 case '#': 2574 if (!ignComment) { 2575 if ( 2576 #if 0 2577 compatMake && 2578 #endif 2579 (lastc != '\\')) { 2580 /* 2581 * If the character is a hash mark and it isn't escaped 2582 * (or we're being compatible), the thing is a comment. 2583 * Skip to the end of the line. 2584 */ 2585 do { 2586 c = ParseReadc(); 2587 /* 2588 * If we found a backslash not escaped 2589 * itself it means that the comment is 2590 * going to continue in the next line. 2591 */ 2592 if (c == '\\') 2593 ParseReadc(); 2594 } while ((c != '\n') && (c != EOF)); 2595 goto line_read; 2596 } else { 2597 /* 2598 * Don't add the backslash. Just let the # get copied 2599 * over. 2600 */ 2601 lastc = c; 2602 continue; 2603 } 2604 } 2605 break; 2606 case ':': 2607 case '!': 2608 if (!ignDepOp && (c == ':' || c == '!')) { 2609 /* 2610 * A semi-colon is recognized as a newline only on 2611 * dependency lines. Dependency lines are lines with a 2612 * colon or an exclamation point. Ergo... 2613 */ 2614 semiNL = TRUE; 2615 } 2616 break; 2617 } 2618 /* 2619 * Copy in the previous character and save this one in lastc. 2620 */ 2621 Buf_AddByte(buf, (Byte)lastc); 2622 lastc = c; 2623 2624 } 2625 line_read: 2626 curFile.lineno++; 2627 2628 if (lastc != '\0') { 2629 Buf_AddByte(buf, (Byte)lastc); 2630 } 2631 Buf_AddByte(buf, (Byte)'\0'); 2632 line = (char *)Buf_GetAll(buf, &lineLength); 2633 Buf_Destroy(buf, FALSE); 2634 2635 /* 2636 * Strip trailing blanks and tabs from the line. 2637 * Do not strip a blank or tab that is preceded by 2638 * a '\' 2639 */ 2640 ep = line; 2641 while (*ep) 2642 ++ep; 2643 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2644 if (ep > line + 1 && ep[-2] == '\\') 2645 break; 2646 --ep; 2647 } 2648 *ep = 0; 2649 2650 if (line[0] == '.') { 2651 /* 2652 * The line might be a conditional. Ask the conditional module 2653 * about it and act accordingly 2654 */ 2655 switch (Cond_Eval(line)) { 2656 case COND_SKIP: 2657 /* 2658 * Skip to next conditional that evaluates to COND_PARSE. 2659 */ 2660 do { 2661 free(line); 2662 line = ParseSkipLine(1, 0); 2663 } while (line && Cond_Eval(line) != COND_PARSE); 2664 if (line == NULL) 2665 break; 2666 /*FALLTHRU*/ 2667 case COND_PARSE: 2668 free(line); 2669 line = ParseReadLine(); 2670 break; 2671 case COND_INVALID: 2672 lineno = curFile.lineno; 2673 if (For_Eval(line)) { 2674 int ok; 2675 free(line); 2676 do { 2677 /* 2678 * Skip after the matching end 2679 */ 2680 line = ParseSkipLine(0, 1); 2681 if (line == NULL) { 2682 Parse_Error(PARSE_FATAL, 2683 "Unexpected end of file in for loop.\n"); 2684 break; 2685 } 2686 ok = For_Eval(line); 2687 free(line); 2688 } 2689 while (ok); 2690 if (line != NULL) 2691 For_Run(lineno); 2692 line = ParseReadLine(); 2693 } 2694 break; 2695 } 2696 } 2697 return (line); 2698 2699 } else { 2700 /* 2701 * Hit end-of-file, so return a NULL line to indicate this. 2702 */ 2703 return(NULL); 2704 } 2705 } 2706 2707 /*- 2708 *----------------------------------------------------------------------- 2709 * ParseFinishLine -- 2710 * Handle the end of a dependency group. 2711 * 2712 * Results: 2713 * Nothing. 2714 * 2715 * Side Effects: 2716 * inLine set FALSE. 'targets' list destroyed. 2717 * 2718 *----------------------------------------------------------------------- 2719 */ 2720 static void 2721 ParseFinishLine(void) 2722 { 2723 if (inLine) { 2724 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2725 Lst_Destroy(targets, ParseHasCommands); 2726 targets = NULL; 2727 inLine = FALSE; 2728 } 2729 } 2730 2731 2732 /*- 2733 *--------------------------------------------------------------------- 2734 * Parse_File -- 2735 * Parse a file into its component parts, incorporating it into the 2736 * current dependency graph. This is the main function and controls 2737 * almost every other function in this module 2738 * 2739 * Input: 2740 * name the name of the file being read 2741 * stream Stream open to makefile to parse 2742 * 2743 * Results: 2744 * None 2745 * 2746 * Side Effects: 2747 * Loads. Nodes are added to the list of all targets, nodes and links 2748 * are added to the dependency graph. etc. etc. etc. 2749 *--------------------------------------------------------------------- 2750 */ 2751 void 2752 Parse_File(const char *name, FILE *stream) 2753 { 2754 char *cp, /* pointer into the line */ 2755 *line; /* the line we're working on */ 2756 2757 inLine = FALSE; 2758 fatals = 0; 2759 2760 curFile.fname = UNCONST(name); 2761 curFile.F = stream; 2762 curFile.lineno = 0; 2763 2764 ParseSetParseFile(curFile.fname); 2765 2766 do { 2767 while ((line = ParseReadLine()) != NULL) { 2768 if (*line == '.') { 2769 /* 2770 * Lines that begin with the special character are either 2771 * include or undef directives. 2772 */ 2773 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2774 continue; 2775 } 2776 if (strncmp(cp, "include", 7) == 0 || 2777 ((cp[0] == 's' || cp[0] == '-') && 2778 strncmp(&cp[1], "include", 7) == 0)) { 2779 ParseDoInclude(cp); 2780 goto nextLine; 2781 } else if (strncmp(cp, "undef", 5) == 0) { 2782 char *cp2; 2783 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2784 continue; 2785 } 2786 2787 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2788 (*cp2 != '\0'); cp2++) { 2789 continue; 2790 } 2791 2792 *cp2 = '\0'; 2793 2794 Var_Delete(cp, VAR_GLOBAL); 2795 goto nextLine; 2796 } 2797 } 2798 if (*line == '#') { 2799 /* If we're this far, the line must be a comment. */ 2800 goto nextLine; 2801 } 2802 2803 if (*line == '\t') { 2804 /* 2805 * If a line starts with a tab, it can only hope to be 2806 * a creation command. 2807 */ 2808 #ifndef POSIX 2809 shellCommand: 2810 #endif 2811 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2812 continue; 2813 } 2814 if (*cp) { 2815 if (inLine) { 2816 /* 2817 * So long as it's not a blank line and we're actually 2818 * in a dependency spec, add the command to the list of 2819 * commands of all targets in the dependency spec 2820 */ 2821 Lst_ForEach(targets, ParseAddCmd, cp); 2822 #ifdef CLEANUP 2823 Lst_AtEnd(targCmds, (ClientData) line); 2824 #endif 2825 continue; 2826 } else { 2827 Parse_Error(PARSE_FATAL, 2828 "Unassociated shell command \"%s\"", 2829 cp); 2830 } 2831 } 2832 #ifdef SYSVINCLUDE 2833 } else if (((strncmp(line, "include", 7) == 0 && 2834 isspace((unsigned char) line[7])) || 2835 ((line[0] == 's' || line[0] == '-') && 2836 strncmp(&line[1], "include", 7) == 0 && 2837 isspace((unsigned char) line[8]))) && 2838 strchr(line, ':') == NULL) { 2839 /* 2840 * It's an S3/S5-style "include". 2841 */ 2842 ParseTraditionalInclude(line); 2843 goto nextLine; 2844 #endif 2845 } else if (Parse_IsVar(line)) { 2846 ParseFinishLine(); 2847 Parse_DoVar(line, VAR_GLOBAL); 2848 } else { 2849 /* 2850 * We now know it's a dependency line so it needs to have all 2851 * variables expanded before being parsed. Tell the variable 2852 * module to complain if some variable is undefined... 2853 * To make life easier on novices, if the line is indented we 2854 * first make sure the line has a dependency operator in it. 2855 * If it doesn't have an operator and we're in a dependency 2856 * line's script, we assume it's actually a shell command 2857 * and add it to the current list of targets. 2858 */ 2859 #ifndef POSIX 2860 Boolean nonSpace = FALSE; 2861 #endif 2862 2863 cp = line; 2864 if (isspace((unsigned char) line[0])) { 2865 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2866 cp++; 2867 } 2868 if (*cp == '\0') { 2869 goto nextLine; 2870 } 2871 #ifndef POSIX 2872 while (*cp && (ParseIsEscaped(line, cp) || 2873 (*cp != ':') && (*cp != '!'))) { 2874 nonSpace = TRUE; 2875 cp++; 2876 } 2877 #endif 2878 } 2879 2880 #ifndef POSIX 2881 if (*cp == '\0') { 2882 if (inLine) { 2883 Parse_Error(PARSE_WARNING, 2884 "Shell command needs a leading tab"); 2885 goto shellCommand; 2886 } else if (nonSpace) { 2887 Parse_Error(PARSE_FATAL, "Missing operator"); 2888 } 2889 } else { 2890 #endif 2891 ParseFinishLine(); 2892 2893 cp = Var_Subst(NULL, line, VAR_CMD, TRUE); 2894 free(line); 2895 line = cp; 2896 2897 /* 2898 * Need a non-circular list for the target nodes 2899 */ 2900 if (targets) 2901 Lst_Destroy(targets, NOFREE); 2902 2903 targets = Lst_Init(FALSE); 2904 inLine = TRUE; 2905 2906 ParseDoDependency(line); 2907 #ifndef POSIX 2908 } 2909 #endif 2910 } 2911 2912 nextLine: 2913 2914 free(line); 2915 } 2916 /* 2917 * Reached EOF, but it may be just EOF of an include file... 2918 */ 2919 } while (ParseEOF(1) == CONTINUE); 2920 2921 /* 2922 * Make sure conditionals are clean 2923 */ 2924 Cond_End(); 2925 2926 if (fatals) { 2927 (void)fprintf(stderr, 2928 "%s: Fatal errors encountered -- cannot continue\n", 2929 progname); 2930 PrintOnError(NULL); 2931 exit(1); 2932 } 2933 } 2934 2935 /*- 2936 *--------------------------------------------------------------------- 2937 * Parse_Init -- 2938 * initialize the parsing module 2939 * 2940 * Results: 2941 * none 2942 * 2943 * Side Effects: 2944 * the parseIncPath list is initialized... 2945 *--------------------------------------------------------------------- 2946 */ 2947 void 2948 Parse_Init(void) 2949 { 2950 mainNode = NILGNODE; 2951 parseIncPath = Lst_Init(FALSE); 2952 sysIncPath = Lst_Init(FALSE); 2953 defIncPath = Lst_Init(FALSE); 2954 includes = Lst_Init(FALSE); 2955 #ifdef CLEANUP 2956 targCmds = Lst_Init(FALSE); 2957 #endif 2958 } 2959 2960 void 2961 Parse_End(void) 2962 { 2963 #ifdef CLEANUP 2964 Lst_Destroy(targCmds, (FreeProc *)free); 2965 if (targets) 2966 Lst_Destroy(targets, NOFREE); 2967 Lst_Destroy(defIncPath, Dir_Destroy); 2968 Lst_Destroy(sysIncPath, Dir_Destroy); 2969 Lst_Destroy(parseIncPath, Dir_Destroy); 2970 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2971 #endif 2972 } 2973 2974 2975 /*- 2976 *----------------------------------------------------------------------- 2977 * Parse_MainName -- 2978 * Return a Lst of the main target to create for main()'s sake. If 2979 * no such target exists, we Punt with an obnoxious error message. 2980 * 2981 * Results: 2982 * A Lst of the single node to create. 2983 * 2984 * Side Effects: 2985 * None. 2986 * 2987 *----------------------------------------------------------------------- 2988 */ 2989 Lst 2990 Parse_MainName(void) 2991 { 2992 Lst mainList; /* result list */ 2993 2994 mainList = Lst_Init(FALSE); 2995 2996 if (mainNode == NILGNODE) { 2997 Punt("no target to make."); 2998 /*NOTREACHED*/ 2999 } else if (mainNode->type & OP_DOUBLEDEP) { 3000 (void)Lst_AtEnd(mainList, (ClientData)mainNode); 3001 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 3002 } 3003 else 3004 (void)Lst_AtEnd(mainList, (ClientData)mainNode); 3005 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 3006 return (mainList); 3007 } 3008 3009 /*- 3010 *----------------------------------------------------------------------- 3011 * ParseMark -- 3012 * Add the filename and lineno to the GNode so that we remember 3013 * where it was first defined. 3014 * 3015 * Side Effects: 3016 * None. 3017 * 3018 *----------------------------------------------------------------------- 3019 */ 3020 static void 3021 ParseMark(GNode *gn) 3022 { 3023 gn->fname = strdup(curFile.fname); 3024 gn->lineno = curFile.lineno; 3025 } 3026
Indexes created Mon Sep 22 10:09:38 GMT 2025