1 /* $NetBSD: make.h,v 1.103 2017/07/20 19:29:54 sjg 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 * from: @(#)make.h 8.3 (Berkeley) 6/13/95 35 */ 36 37 /* 38 * Copyright (c) 1989 by Berkeley Softworks 39 * All rights reserved. 40 * 41 * This code is derived from software contributed to Berkeley by 42 * Adam de Boor. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Berkeley and its contributors. 56 * 4. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * from: @(#)make.h 8.3 (Berkeley) 6/13/95 73 */ 74 75 /*- 76 * make.h -- 77 * The global definitions for pmake 78 */ 79 80 #ifndef _MAKE_H_ 81 #define _MAKE_H_ 82 83 #ifdef HAVE_CONFIG_H 84 # include "config.h" 85 #endif 86 87 #include <sys/types.h> 88 #include <sys/param.h> 89 90 #include <ctype.h> 91 #include <fcntl.h> 92 #include <stdio.h> 93 #include <stdlib.h> 94 #ifdef HAVE_STRING_H 95 #include <string.h> 96 #else 97 #include <strings.h> 98 #endif 99 #include <unistd.h> 100 #include <sys/cdefs.h> 101 102 #ifndef FD_CLOEXEC 103 #define FD_CLOEXEC 1 104 #endif 105 106 #if defined(__GNUC__) 107 #define MAKE_GNUC_PREREQ(x, y) \ 108 ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \ 109 (__GNUC__ > (x))) 110 #else /* defined(__GNUC__) */ 111 #define MAKE_GNUC_PREREQ(x, y) 0 112 #endif /* defined(__GNUC__) */ 113 114 #if MAKE_GNUC_PREREQ(2, 7) 115 #define MAKE_ATTR_UNUSED __attribute__((__unused__)) 116 #else 117 #define MAKE_ATTR_UNUSED /* delete */ 118 #endif 119 120 #if MAKE_GNUC_PREREQ(2, 5) 121 #define MAKE_ATTR_DEAD __attribute__((__noreturn__)) 122 #elif defined(__GNUC__) 123 #define MAKE_ATTR_DEAD __volatile 124 #else 125 #define MAKE_ATTR_DEAD /* delete */ 126 #endif 127 128 #if MAKE_GNUC_PREREQ(2, 7) 129 #define MAKE_ATTR_PRINTFLIKE(fmtarg, firstvararg) \ 130 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 131 #else 132 #define MAKE_ATTR_PRINTFLIKE(fmtarg, firstvararg) /* delete */ 133 #endif 134 135 #include "sprite.h" 136 #include "lst.h" 137 #include "hash.h" 138 #include "make-conf.h" 139 #include "buf.h" 140 #include "make_malloc.h" 141 142 /* 143 * some vendors don't have this --sjg 144 */ 145 #if defined(S_IFDIR) && !defined(S_ISDIR) 146 # define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) 147 #endif 148 149 #if defined(sun) && (defined(__svr4__) || defined(__SVR4)) 150 #define POSIX_SIGNALS 151 #endif 152 153 /*- 154 * The structure for an individual graph node. Each node has several 155 * pieces of data associated with it. 156 * 1) the name of the target it describes 157 * 2) the location of the target file in the file system. 158 * 3) the type of operator used to define its sources (qv. parse.c) 159 * 4) whether it is involved in this invocation of make 160 * 5) whether the target has been remade 161 * 6) whether any of its children has been remade 162 * 7) the number of its children that are, as yet, unmade 163 * 8) its modification time 164 * 9) the modification time of its youngest child (qv. make.c) 165 * 10) a list of nodes for which this is a source (parents) 166 * 11) a list of nodes on which this depends (children) 167 * 12) a list of nodes that depend on this, as gleaned from the 168 * transformation rules (iParents) 169 * 13) a list of ancestor nodes, which includes parents, iParents, 170 * and recursive parents of parents 171 * 14) a list of nodes of the same name created by the :: operator 172 * 15) a list of nodes that must be made (if they're made) before 173 * this node can be, but that do not enter into the datedness of 174 * this node. 175 * 16) a list of nodes that must be made (if they're made) before 176 * this node or any child of this node can be, but that do not 177 * enter into the datedness of this node. 178 * 17) a list of nodes that must be made (if they're made) after 179 * this node is, but that do not depend on this node, in the 180 * normal sense. 181 * 18) a Lst of ``local'' variables that are specific to this target 182 * and this target only (qv. var.c [$@ $< $?, etc.]) 183 * 19) a Lst of strings that are commands to be given to a shell 184 * to create this target. 185 */ 186 typedef struct GNode { 187 char *name; /* The target's name */ 188 char *uname; /* The unexpanded name of a .USE node */ 189 char *path; /* The full pathname of the file */ 190 int type; /* Its type (see the OP flags, below) */ 191 192 int flags; 193 #define REMAKE 0x1 /* this target needs to be (re)made */ 194 #define CHILDMADE 0x2 /* children of this target were made */ 195 #define FORCE 0x4 /* children don't exist, and we pretend made */ 196 #define DONE_WAIT 0x8 /* Set by Make_ProcessWait() */ 197 #define DONE_ORDER 0x10 /* Build requested by .ORDER processing */ 198 #define FROM_DEPEND 0x20 /* Node created from .depend */ 199 #define DONE_ALLSRC 0x40 /* We do it once only */ 200 #define CYCLE 0x1000 /* Used by MakePrintStatus */ 201 #define DONECYCLE 0x2000 /* Used by MakePrintStatus */ 202 #define INTERNAL 0x4000 /* Internal use only */ 203 enum enum_made { 204 UNMADE, DEFERRED, REQUESTED, BEINGMADE, 205 MADE, UPTODATE, ERROR, ABORTED 206 } made; /* Set to reflect the state of processing 207 * on this node: 208 * UNMADE - Not examined yet 209 * DEFERRED - Examined once (building child) 210 * REQUESTED - on toBeMade list 211 * BEINGMADE - Target is already being made. 212 * Indicates a cycle in the graph. 213 * MADE - Was out-of-date and has been made 214 * UPTODATE - Was already up-to-date 215 * ERROR - An error occurred while it was being 216 * made (used only in compat mode) 217 * ABORTED - The target was aborted due to 218 * an error making an inferior (compat). 219 */ 220 int unmade; /* The number of unmade children */ 221 222 time_t mtime; /* Its modification time */ 223 struct GNode *cmgn; /* The youngest child */ 224 225 Lst iParents; /* Links to parents for which this is an 226 * implied source, if any */ 227 Lst cohorts; /* Other nodes for the :: operator */ 228 Lst parents; /* Nodes that depend on this one */ 229 Lst children; /* Nodes on which this one depends */ 230 Lst order_pred; /* .ORDER nodes we need made */ 231 Lst order_succ; /* .ORDER nodes who need us */ 232 233 char cohort_num[8]; /* #n for this cohort */ 234 int unmade_cohorts;/* # of unmade instances on the 235 cohorts list */ 236 struct GNode *centurion; /* Pointer to the first instance of a :: 237 node; only set when on a cohorts list */ 238 unsigned int checked; /* Last time we tried to makle this node */ 239 240 Hash_Table context; /* The local variables */ 241 Lst commands; /* Creation commands */ 242 243 struct _Suff *suffix; /* Suffix for the node (determined by 244 * Suff_FindDeps and opaque to everyone 245 * but the Suff module) */ 246 const char *fname; /* filename where the GNode got defined */ 247 int lineno; /* line number where the GNode got defined */ 248 } GNode; 249 250 /* 251 * The OP_ constants are used when parsing a dependency line as a way of 252 * communicating to other parts of the program the way in which a target 253 * should be made. These constants are bitwise-OR'ed together and 254 * placed in the 'type' field of each node. Any node that has 255 * a 'type' field which satisfies the OP_NOP function was never never on 256 * the lefthand side of an operator, though it may have been on the 257 * righthand side... 258 */ 259 #define OP_DEPENDS 0x00000001 /* Execution of commands depends on 260 * kids (:) */ 261 #define OP_FORCE 0x00000002 /* Always execute commands (!) */ 262 #define OP_DOUBLEDEP 0x00000004 /* Execution of commands depends on kids 263 * per line (::) */ 264 #define OP_OPMASK (OP_DEPENDS|OP_FORCE|OP_DOUBLEDEP) 265 266 #define OP_OPTIONAL 0x00000008 /* Don't care if the target doesn't 267 * exist and can't be created */ 268 #define OP_USE 0x00000010 /* Use associated commands for parents */ 269 #define OP_EXEC 0x00000020 /* Target is never out of date, but always 270 * execute commands anyway. Its time 271 * doesn't matter, so it has none...sort 272 * of */ 273 #define OP_IGNORE 0x00000040 /* Ignore errors when creating the node */ 274 #define OP_PRECIOUS 0x00000080 /* Don't remove the target when 275 * interrupted */ 276 #define OP_SILENT 0x00000100 /* Don't echo commands when executed */ 277 #define OP_MAKE 0x00000200 /* Target is a recursive make so its 278 * commands should always be executed when 279 * it is out of date, regardless of the 280 * state of the -n or -t flags */ 281 #define OP_JOIN 0x00000400 /* Target is out-of-date only if any of its 282 * children was out-of-date */ 283 #define OP_MADE 0x00000800 /* Assume the children of the node have 284 * been already made */ 285 #define OP_SPECIAL 0x00001000 /* Special .BEGIN, .END, .INTERRUPT */ 286 #define OP_USEBEFORE 0x00002000 /* Like .USE, only prepend commands */ 287 #define OP_INVISIBLE 0x00004000 /* The node is invisible to its parents. 288 * I.e. it doesn't show up in the parents's 289 * local variables. */ 290 #define OP_NOTMAIN 0x00008000 /* The node is exempt from normal 'main 291 * target' processing in parse.c */ 292 #define OP_PHONY 0x00010000 /* Not a file target; run always */ 293 #define OP_NOPATH 0x00020000 /* Don't search for file in the path */ 294 #define OP_WAIT 0x00040000 /* .WAIT phony node */ 295 #define OP_NOMETA 0x00080000 /* .NOMETA do not create a .meta file */ 296 #define OP_META 0x00100000 /* .META we _do_ want a .meta file */ 297 #define OP_NOMETA_CMP 0x00200000 /* Do not compare commands in .meta file */ 298 #define OP_SUBMAKE 0x00400000 /* Possibly a submake node */ 299 /* Attributes applied by PMake */ 300 #define OP_TRANSFORM 0x80000000 /* The node is a transformation rule */ 301 #define OP_MEMBER 0x40000000 /* Target is a member of an archive */ 302 #define OP_LIB 0x20000000 /* Target is a library */ 303 #define OP_ARCHV 0x10000000 /* Target is an archive construct */ 304 #define OP_HAS_COMMANDS 0x08000000 /* Target has all the commands it should. 305 * Used when parsing to catch multiple 306 * commands for a target */ 307 #define OP_SAVE_CMDS 0x04000000 /* Saving commands on .END (Compat) */ 308 #define OP_DEPS_FOUND 0x02000000 /* Already processed by Suff_FindDeps */ 309 #define OP_MARK 0x01000000 /* Node found while expanding .ALLSRC */ 310 311 #define NoExecute(gn) ((gn->type & OP_MAKE) ? noRecursiveExecute : noExecute) 312 /* 313 * OP_NOP will return TRUE if the node with the given type was not the 314 * object of a dependency operator 315 */ 316 #define OP_NOP(t) (((t) & OP_OPMASK) == 0x00000000) 317 318 #define OP_NOTARGET (OP_NOTMAIN|OP_USE|OP_EXEC|OP_TRANSFORM) 319 320 /* 321 * The TARG_ constants are used when calling the Targ_FindNode and 322 * Targ_FindList functions in targ.c. They simply tell the functions what to 323 * do if the desired node(s) is (are) not found. If the TARG_CREATE constant 324 * is given, a new, empty node will be created for the target, placed in the 325 * table of all targets and its address returned. If TARG_NOCREATE is given, 326 * a NULL pointer will be returned. 327 */ 328 #define TARG_NOCREATE 0x00 /* don't create it */ 329 #define TARG_CREATE 0x01 /* create node if not found */ 330 #define TARG_NOHASH 0x02 /* don't look in/add to hash table */ 331 332 /* 333 * These constants are all used by the Str_Concat function to decide how the 334 * final string should look. If STR_ADDSPACE is given, a space will be 335 * placed between the two strings. If STR_ADDSLASH is given, a '/' will 336 * be used instead of a space. If neither is given, no intervening characters 337 * will be placed between the two strings in the final output. If the 338 * STR_DOFREE bit is set, the two input strings will be freed before 339 * Str_Concat returns. 340 */ 341 #define STR_ADDSPACE 0x01 /* add a space when Str_Concat'ing */ 342 #define STR_ADDSLASH 0x02 /* add a slash when Str_Concat'ing */ 343 344 /* 345 * Error levels for parsing. PARSE_FATAL means the process cannot continue 346 * once the makefile has been parsed. PARSE_WARNING means it can. Passed 347 * as the first argument to Parse_Error. 348 */ 349 #define PARSE_WARNING 2 350 #define PARSE_FATAL 1 351 352 /* 353 * Values returned by Cond_Eval. 354 */ 355 #define COND_PARSE 0 /* Parse the next lines */ 356 #define COND_SKIP 1 /* Skip the next lines */ 357 #define COND_INVALID 2 /* Not a conditional statement */ 358 359 /* 360 * Definitions for the "local" variables. Used only for clarity. 361 */ 362 #define TARGET "@" /* Target of dependency */ 363 #define OODATE "?" /* All out-of-date sources */ 364 #define ALLSRC ">" /* All sources */ 365 #define IMPSRC "<" /* Source implied by transformation */ 366 #define PREFIX "*" /* Common prefix */ 367 #define ARCHIVE "!" /* Archive in "archive(member)" syntax */ 368 #define MEMBER "%" /* Member in "archive(member)" syntax */ 369 370 #define FTARGET "@F" /* file part of TARGET */ 371 #define DTARGET "@D" /* directory part of TARGET */ 372 #define FIMPSRC "<F" /* file part of IMPSRC */ 373 #define DIMPSRC "<D" /* directory part of IMPSRC */ 374 #define FPREFIX "*F" /* file part of PREFIX */ 375 #define DPREFIX "*D" /* directory part of PREFIX */ 376 377 /* 378 * Global Variables 379 */ 380 extern Lst create; /* The list of target names specified on the 381 * command line. used to resolve #if 382 * make(...) statements */ 383 extern Lst dirSearchPath; /* The list of directories to search when 384 * looking for targets */ 385 386 extern Boolean compatMake; /* True if we are make compatible */ 387 extern Boolean ignoreErrors; /* True if should ignore all errors */ 388 extern Boolean beSilent; /* True if should print no commands */ 389 extern Boolean noExecute; /* True if should execute nothing */ 390 extern Boolean noRecursiveExecute; /* True if should execute nothing */ 391 extern Boolean allPrecious; /* True if every target is precious */ 392 extern Boolean deleteOnError; /* True if failed targets should be deleted */ 393 extern Boolean keepgoing; /* True if should continue on unaffected 394 * portions of the graph when have an error 395 * in one portion */ 396 extern Boolean touchFlag; /* TRUE if targets should just be 'touched' 397 * if out of date. Set by the -t flag */ 398 extern Boolean queryFlag; /* TRUE if we aren't supposed to really make 399 * anything, just see if the targets are out- 400 * of-date */ 401 extern Boolean doing_depend; /* TRUE if processing .depend */ 402 403 extern Boolean checkEnvFirst; /* TRUE if environment should be searched for 404 * variables before the global context */ 405 extern Boolean jobServer; /* a jobServer already exists */ 406 407 extern Boolean parseWarnFatal; /* TRUE if makefile parsing warnings are 408 * treated as errors */ 409 410 extern Boolean varNoExportEnv; /* TRUE if we should not export variables 411 * set on the command line to the env. */ 412 413 extern GNode *DEFAULT; /* .DEFAULT rule */ 414 415 extern GNode *VAR_INTERNAL; /* Variables defined internally by make 416 * which should not override those set by 417 * makefiles. 418 */ 419 extern GNode *VAR_GLOBAL; /* Variables defined in a global context, e.g 420 * in the Makefile itself */ 421 extern GNode *VAR_CMD; /* Variables defined on the command line */ 422 extern GNode *VAR_FOR; /* Iteration variables */ 423 extern char var_Error[]; /* Value returned by Var_Parse when an error 424 * is encountered. It actually points to 425 * an empty string, so naive callers needn't 426 * worry about it. */ 427 428 extern time_t now; /* The time at the start of this whole 429 * process */ 430 431 extern Boolean oldVars; /* Do old-style variable substitution */ 432 433 extern Lst sysIncPath; /* The system include path. */ 434 extern Lst defIncPath; /* The default include path. */ 435 436 extern char curdir[]; /* Startup directory */ 437 extern char *progname; /* The program name */ 438 extern char *makeDependfile; /* .depend */ 439 extern char **savedEnv; /* if we replaced environ this will be non-NULL */ 440 441 /* 442 * We cannot vfork() in a child of vfork(). 443 * Most systems do not enforce this but some do. 444 */ 445 #define vFork() ((getpid() == myPid) ? vfork() : fork()) 446 extern pid_t myPid; 447 448 #define MAKEFLAGS ".MAKEFLAGS" 449 #define MAKEOVERRIDES ".MAKEOVERRIDES" 450 #define MAKE_JOB_PREFIX ".MAKE.JOB.PREFIX" /* prefix for job target output */ 451 #define MAKE_EXPORTED ".MAKE.EXPORTED" /* variables we export */ 452 #define MAKE_MAKEFILES ".MAKE.MAKEFILES" /* all the makefiles we read */ 453 #define MAKE_LEVEL ".MAKE.LEVEL" /* recursion level */ 454 #define MAKEFILE_PREFERENCE ".MAKE.MAKEFILE_PREFERENCE" 455 #define MAKE_DEPENDFILE ".MAKE.DEPENDFILE" /* .depend */ 456 #define MAKE_MODE ".MAKE.MODE" 457 #ifndef MAKE_LEVEL_ENV 458 # define MAKE_LEVEL_ENV "MAKELEVEL" 459 #endif 460 461 /* 462 * debug control: 463 * There is one bit per module. It is up to the module what debug 464 * information to print. 465 */ 466 FILE *debug_file; /* Output written here - default stdout */ 467 extern int debug; 468 #define DEBUG_ARCH 0x00001 469 #define DEBUG_COND 0x00002 470 #define DEBUG_DIR 0x00004 471 #define DEBUG_GRAPH1 0x00008 472 #define DEBUG_GRAPH2 0x00010 473 #define DEBUG_JOB 0x00020 474 #define DEBUG_MAKE 0x00040 475 #define DEBUG_SUFF 0x00080 476 #define DEBUG_TARG 0x00100 477 #define DEBUG_VAR 0x00200 478 #define DEBUG_FOR 0x00400 479 #define DEBUG_SHELL 0x00800 480 #define DEBUG_ERROR 0x01000 481 #define DEBUG_LOUD 0x02000 482 #define DEBUG_META 0x04000 483 484 #define DEBUG_GRAPH3 0x10000 485 #define DEBUG_SCRIPT 0x20000 486 #define DEBUG_PARSE 0x40000 487 #define DEBUG_CWD 0x80000 488 489 #define CONCAT(a,b) a##b 490 491 #define DEBUG(module) (debug & CONCAT(DEBUG_,module)) 492 493 #include "nonints.h" 494 495 int Make_TimeStamp(GNode *, GNode *); 496 Boolean Make_OODate(GNode *); 497 void Make_ExpandUse(Lst); 498 time_t Make_Recheck(GNode *); 499 void Make_HandleUse(GNode *, GNode *); 500 void Make_Update(GNode *); 501 void Make_DoAllVar(GNode *); 502 Boolean Make_Run(Lst); 503 char * Check_Cwd_Cmd(const char *); 504 void Check_Cwd(const char **); 505 void PrintOnError(GNode *, const char *); 506 void Main_ExportMAKEFLAGS(Boolean); 507 Boolean Main_SetObjdir(const char *, ...) MAKE_ATTR_PRINTFLIKE(1, 2); 508 int mkTempFile(const char *, char **); 509 int str2Lst_Append(Lst, char *, const char *); 510 int cached_lstat(const char *, void *); 511 int cached_stat(const char *, void *); 512 513 #define VARF_UNDEFERR 1 514 #define VARF_WANTRES 2 515 #define VARF_ASSIGN 4 516 517 #ifdef __GNUC__ 518 #define UNCONST(ptr) ({ \ 519 union __unconst { \ 520 const void *__cp; \ 521 void *__p; \ 522 } __d; \ 523 __d.__cp = ptr, __d.__p; }) 524 #else 525 #define UNCONST(ptr) (void *)(ptr) 526 #endif 527 528 #ifndef MIN 529 #define MIN(a, b) ((a < b) ? a : b) 530 #endif 531 #ifndef MAX 532 #define MAX(a, b) ((a > b) ? a : b) 533 #endif 534 535 /* At least GNU/Hurd systems lack hardcoded MAXPATHLEN/PATH_MAX */ 536 #ifdef HAVE_LIMITS_H 537 #include <limits.h> 538 #endif 539 #ifndef MAXPATHLEN 540 #define MAXPATHLEN BMAKE_PATH_MAX 541 #endif 542 #ifndef PATH_MAX 543 #define PATH_MAX MAXPATHLEN 544 #endif 545 546 #if defined(SYSV) 547 #define KILLPG(pid, sig) kill(-(pid), (sig)) 548 #else 549 #define KILLPG(pid, sig) killpg((pid), (sig)) 550 #endif 551 552 #endif /* _MAKE_H_ */ 553