make.h

   1 /* Miscellaneous global declarations and portability cruft for GNU Make.
   2 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
   3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
   4 2010 Free Software Foundation, Inc.
   5 This file is part of GNU Make.
   6
   7 GNU Make is free software; you can redistribute it and/or modify it under the
   8 terms of the GNU General Public License as published by the Free Software
   9 Foundation; either version 3 of the License, or (at your option) any later
  10 version.
  11
  12 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  14 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License along with
  17 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* We use <config.h> instead of "config.h" so that a compilation
  20    using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
  21    (which it would do because make.h was found in $srcdir).  */
  22 #include <config.h>
  23 #undef  HAVE_CONFIG_H
  24 #define HAVE_CONFIG_H 1
  25
  26 /* Specify we want GNU source code.  This must be defined before any
  27    system headers are included.  */
  28
  29 #define _GNU_SOURCE 1
  30
  31 /* AIX requires this to be the first thing in the file.  */
  32 #if HAVE_ALLOCA_H
  33 # include <alloca.h>
  34 #else
  35 # ifdef _AIX
  36  #pragma alloca
  37 # else
  38 #  if !defined(__GNUC__) && !defined(WINDOWS32)
  39 #   ifndef alloca /* predefined by HP cc +Olibcalls */
  40 char *alloca ();
  41 #   endif
  42 #  endif
  43 # endif
  44 #endif
  45
  46
  47 #ifdef  CRAY
  48 /* This must happen before #include <signal.h> so
  49    that the declaration therein is changed.  */
  50 # define signal bsdsignal
  51 #endif
  52
  53 /* If we're compiling for the dmalloc debugger, turn off string inlining.  */
  54 #if defined(HAVE_DMALLOC_H) && defined(__GNUC__)
  55 # define __NO_STRING_INLINES
  56 #endif
  57
  58 #include <sys/types.h>
  59 #include <sys/stat.h>
  60 #include <signal.h>
  61 #include <stdio.h>
  62 #include <ctype.h>
  63 #ifdef HAVE_SYS_TIMEB_H
  64 /* SCO 3.2 "devsys 4.2" has a prototype for `ftime' in <time.h> that bombs
  65    unless <sys/timeb.h> has been included first.  Does every system have a
  66    <sys/timeb.h>?  If any does not, configure should check for it.  */
  67 # include <sys/timeb.h>
  68 #endif
  69
  70 #if TIME_WITH_SYS_TIME
  71 # include <sys/time.h>
  72 # include <time.h>
  73 #else
  74 # if HAVE_SYS_TIME_H
  75 #  include <sys/time.h>
  76 # else
  77 #  include <time.h>
  78 # endif
  79 #endif
  80
  81 #include <errno.h>
  82
  83 #ifndef errno
  84 extern int errno;
  85 #endif
  86
  87 #ifndef isblank
  88 # define isblank(c)     ((c) == ' ' || (c) == '\t')
  89 #endif
  90
  91 #ifdef  HAVE_UNISTD_H
  92 # include <unistd.h>
  93 /* Ultrix's unistd.h always defines _POSIX_VERSION, but you only get
  94    POSIX.1 behavior with `cc -YPOSIX', which predefines POSIX itself!  */
  95 # if defined (_POSIX_VERSION) && !defined (ultrix) && !defined (VMS)
  96 #  define POSIX 1
  97 # endif
  98 #endif
  99
 100 /* Some systems define _POSIX_VERSION but are not really POSIX.1.  */
 101 #if (defined (butterfly) || defined (__arm) || (defined (__mips) && defined (_SYSTYPE_SVR3)) || (defined (sequent) && defined (i386)))
 102 # undef POSIX
 103 #endif
 104
 105 #if !defined (POSIX) && defined (_AIX) && defined (_POSIX_SOURCE)
 106 # define POSIX 1
 107 #endif
 108
 109 #ifndef RETSIGTYPE
 110 # define RETSIGTYPE     void
 111 #endif
 112
 113 #ifndef sigmask
 114 # define sigmask(sig)   (1 << ((sig) - 1))
 115 #endif
 116
 117 #ifndef HAVE_SA_RESTART
 118 # define SA_RESTART 0
 119 #endif
 120
 121 #ifdef  HAVE_LIMITS_H
 122 # include <limits.h>
 123 #endif
 124 #ifdef  HAVE_SYS_PARAM_H
 125 # include <sys/param.h>
 126 #endif
 127
 128 #ifndef PATH_MAX
 129 # ifndef POSIX
 130 #  define PATH_MAX      MAXPATHLEN
 131 # endif
 132 #endif
 133 #ifndef MAXPATHLEN
 134 # define MAXPATHLEN 1024
 135 #endif
 136
 137 #ifdef  PATH_MAX
 138 # define GET_PATH_MAX   PATH_MAX
 139 # define PATH_VAR(var)  char var[PATH_MAX]
 140 #else
 141 # define NEED_GET_PATH_MAX 1
 142 # define GET_PATH_MAX   (get_path_max ())
 143 # define PATH_VAR(var)  char *var = alloca (GET_PATH_MAX)
 144 unsigned int get_path_max (void);
 145 #endif
 146
 147 #ifndef CHAR_BIT
 148 # define CHAR_BIT 8
 149 #endif
 150
 151 /* Nonzero if the integer type T is signed.  */
 152 #define INTEGER_TYPE_SIGNED(t) ((t) -1 < 0)
 153
 154 /* The minimum and maximum values for the integer type T.
 155    Use ~ (t) 0, not -1, for portability to 1's complement hosts.  */
 156 #define INTEGER_TYPE_MINIMUM(t) \
 157   (! INTEGER_TYPE_SIGNED (t) ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))
 158 #define INTEGER_TYPE_MAXIMUM(t) (~ (t) 0 - INTEGER_TYPE_MINIMUM (t))
 159
 160 #ifndef CHAR_MAX
 161 # define CHAR_MAX INTEGER_TYPE_MAXIMUM (char)
 162 #endif
 163
 164 #ifdef STAT_MACROS_BROKEN
 165 # ifdef S_ISREG
 166 #  undef S_ISREG
 167 # endif
 168 # ifdef S_ISDIR
 169 #  undef S_ISDIR
 170 # endif
 171 #endif  /* STAT_MACROS_BROKEN.  */
 172
 173 #ifndef S_ISREG
 174 # define S_ISREG(mode)  (((mode) & S_IFMT) == S_IFREG)
 175 #endif
 176 #ifndef S_ISDIR
 177 # define S_ISDIR(mode)  (((mode) & S_IFMT) == S_IFDIR)
 178 #endif
 179
 180 #ifdef VMS
 181 # include <types.h>
 182 # include <unixlib.h>
 183 # include <unixio.h>
 184 # include <perror.h>
 185 /* Needed to use alloca on VMS.  */
 186 # include <builtins.h>
 187 #endif
 188
 189 #ifndef __attribute__
 190 /* This feature is available in gcc versions 2.5 and later.  */
 191 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
 192 #  define __attribute__(x)
 193 # endif
 194 /* The __-protected variants of `format' and `printf' attributes
 195    are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
 196 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
 197 #  define __format__ format
 198 #  define __printf__ printf
 199 # endif
 200 #endif
 201 #define UNUSED  __attribute__ ((unused))
 202
 203 #if defined (STDC_HEADERS) || defined (__GNU_LIBRARY__)
 204 # include <stdlib.h>
 205 # include <string.h>
 206 # define ANSI_STRING 1
 207 #else   /* No standard headers.  */
 208 # ifdef HAVE_STRING_H
 209 #  include <string.h>
 210 #  define ANSI_STRING 1
 211 # else
 212 #  include <strings.h>
 213 # endif
 214 # ifdef HAVE_MEMORY_H
 215 #  include <memory.h>
 216 # endif
 217 # ifdef HAVE_STDLIB_H
 218 #  include <stdlib.h>
 219 # else
 220 void *malloc (int);
 221 void *realloc (void *, int);
 222 void free (void *);
 223
 224 void abort (void) __attribute__ ((noreturn));
 225 void exit (int) __attribute__ ((noreturn));
 226 # endif /* HAVE_STDLIB_H.  */
 227
 228 #endif /* Standard headers.  */
 229
 230 /* These should be in stdlib.h.  Make sure we have them.  */
 231 #ifndef EXIT_SUCCESS
 232 # define EXIT_SUCCESS 0
 233 #endif
 234 #ifndef EXIT_FAILURE
 235 # define EXIT_FAILURE 1
 236 #endif
 237
 238 #ifndef  ANSI_STRING
 239
 240 /* SCO Xenix has a buggy macro definition in <string.h>.  */
 241 #undef  strerror
 242 #if !defined(__DECC)
 243 char *strerror (int errnum);
 244 #endif
 245
 246 #endif  /* !ANSI_STRING.  */
 247 #undef  ANSI_STRING
 248
 249 #if HAVE_INTTYPES_H
 250 # include <inttypes.h>
 251 #endif
 252 #define FILE_TIMESTAMP uintmax_t
 253
 254 #if !defined(HAVE_STRSIGNAL)
 255 char *strsignal (int signum);
 256 #endif
 257
 258 /* ISDIGIT offers the following features:
 259    - Its arg may be any int or unsigned int; it need not be an unsigned char.
 260    - It's guaranteed to evaluate its argument exactly once.
 261       NOTE!  Make relies on this behavior, don't change it!
 262    - It's typically faster.
 263    POSIX 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
 264    only '0' through '9' are digits.  Prefer ISDIGIT to isdigit() unless
 265    it's important to use the locale's definition of `digit' even when the
 266    host does not conform to POSIX.  */
 267 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
 268
 269 /* Test if two strings are equal. Is this worthwhile?  Should be profiled.  */
 270 #define streq(a, b) \
 271    ((a) == (b) || \
 272     (*(a) == *(b) && (*(a) == '\0' || !strcmp ((a) + 1, (b) + 1))))
 273
 274 /* Test if two strings are equal, but match case-insensitively on systems
 275    which have case-insensitive filesystems.  Should only be used for
 276    filenames!  */
 277 #ifdef HAVE_CASE_INSENSITIVE_FS
 278 # define patheq(a, b) \
 279     ((a) == (b) \
 280      || (tolower((unsigned char)*(a)) == tolower((unsigned char)*(b)) \
 281          && (*(a) == '\0' || !strcasecmp ((a) + 1, (b) + 1))))
 282 #else
 283 # define patheq(a, b) streq(a, b)
 284 #endif
 285
 286 #define strneq(a, b, l) (strncmp ((a), (b), (l)) == 0)
 287
 288 #if defined(__GNUC__) || defined(ENUM_BITFIELDS)
 289 # define ENUM_BITFIELD(bits)    :bits
 290 #else
 291 # define ENUM_BITFIELD(bits)
 292 #endif
 293
 294 /* Handle gettext and locales.  */
 295
 296 #if HAVE_LOCALE_H
 297 # include <locale.h>
 298 #else
 299 # define setlocale(category, locale)
 300 #endif
 301
 302 #include <gettext.h>
 303
 304 #define _(msgid)            gettext (msgid)
 305 #define N_(msgid)           gettext_noop (msgid)
 306 #define S_(msg1,msg2,num)   ngettext (msg1,msg2,num)
 307
 308 /* Handle other OSs.  */
 309 #ifndef PATH_SEPARATOR_CHAR
 310 # if defined(HAVE_DOS_PATHS)
 311 #  define PATH_SEPARATOR_CHAR ';'
 312 # elif defined(VMS)
 313 #  define PATH_SEPARATOR_CHAR ','
 314 # else
 315 #  define PATH_SEPARATOR_CHAR ':'
 316 # endif
 317 #endif
 318
 319 /* This is needed for getcwd() and chdir(), on some W32 systems.  */
 320 #if defined(HAVE_DIRECT_H)
 321 # include <direct.h>
 322 #endif
 323
 324 #ifdef WINDOWS32
 325 # include <fcntl.h>
 326 # include <malloc.h>
 327 # define pipe(_p)        _pipe((_p), 512, O_BINARY)
 328 # define kill(_pid,_sig) w32_kill((_pid),(_sig))
 329
 330 void sync_Path_environment (void);
 331 int w32_kill (pid_t pid, int sig);
 332 char *end_of_token_w32 (const char *s, char stopchar);
 333 int find_and_set_default_shell (const char *token);
 334
 335 /* indicates whether or not we have Bourne shell */
 336 extern int no_default_sh_exe;
 337
 338 /* is default_shell unixy? */
 339 extern int unixy_shell;
 340 #endif  /* WINDOWS32 */
 341
 342 #if defined(HAVE_SYS_RESOURCE_H) && defined(HAVE_GETRLIMIT) && defined(HAVE_SETRLIMIT)
 343 # define SET_STACK_SIZE
 344 #endif
 345 #ifdef SET_STACK_SIZE
 346 # include <sys/resource.h>
 347 struct rlimit stack_limit;
 348 #endif
 349
 350 struct floc
 351   {
 352     const char *filenm;
 353     unsigned long lineno;
 354   };
 355 #define NILF ((struct floc *)0)
 356
 357 #define STRING_SIZE_TUPLE(_s) (_s), (sizeof (_s)-1)
 358
 359 \f
 360 /* We have to have stdarg.h or varargs.h AND v*printf or doprnt to use
 361    variadic versions of these functions.  */
 362
 363 #if HAVE_STDARG_H || HAVE_VARARGS_H
 364 # if HAVE_VPRINTF || HAVE_DOPRNT
 365 #  define USE_VARIADIC 1
 366 # endif
 367 #endif
 368
 369 #if HAVE_ANSI_COMPILER && USE_VARIADIC && HAVE_STDARG_H
 370 const char *concat (unsigned int, ...);
 371 void message (int prefix, const char *fmt, ...)
 372               __attribute__ ((__format__ (__printf__, 2, 3)));
 373 void error (const struct floc *flocp, const char *fmt, ...)
 374             __attribute__ ((__format__ (__printf__, 2, 3)));
 375 void fatal (const struct floc *flocp, const char *fmt, ...)
 376                    __attribute__ ((noreturn, __format__ (__printf__, 2, 3)));
 377 #else
 378 const char *concat ();
 379 void message ();
 380 void error ();
 381 void fatal ();
 382 #endif
 383
 384 void die (int) __attribute__ ((noreturn));
 385 void log_working_directory (int);
 386 void pfatal_with_name (const char *) __attribute__ ((noreturn));
 387 void perror_with_name (const char *, const char *);
 388 void *xmalloc (unsigned int);
 389 void *xcalloc (unsigned int);
 390 void *xrealloc (void *, unsigned int);
 391 char *xstrdup (const char *);
 392 char *xstrndup (const char *, unsigned int);
 393 char *find_next_token (const char **, unsigned int *);
 394 char *next_token (const char *);
 395 char *end_of_token (const char *);
 396 void collapse_continuations (char *);
 397 char *lindex (const char *, const char *, int);
 398 int alpha_compare (const void *, const void *);
 399 void print_spaces (unsigned int);
 400 char *find_percent (char *);
 401 const char *find_percent_cached (const char **);
 402 FILE *open_tmpfile (char **, const char *);
 403
 404 #ifndef NO_ARCHIVES
 405 int ar_name (const char *);
 406 void ar_parse_name (const char *, char **, char **);
 407 int ar_touch (const char *);
 408 time_t ar_member_date (const char *);
 409
 410 typedef long int (*ar_member_func_t) (int desc, const char *mem, int truncated,
 411                                       long int hdrpos, long int datapos,
 412                                       long int size, long int date, int uid,
 413                                       int gid, int mode, const void *arg);
 414
 415 long int ar_scan (const char *archive, ar_member_func_t function, const void *arg);
 416 int ar_name_equal (const char *name, const char *mem, int truncated);
 417 #ifndef VMS
 418 int ar_member_touch (const char *arname, const char *memname);
 419 #endif
 420 #endif
 421
 422 int dir_file_exists_p (const char *, const char *);
 423 int file_exists_p (const char *);
 424 int file_impossible_p (const char *);
 425 void file_impossible (const char *);
 426 const char *dir_name (const char *);
 427 void hash_init_directories (void);
 428
 429 void define_default_variables (void);
 430 void set_default_suffixes (void);
 431 void install_default_suffix_rules (void);
 432 void install_default_implicit_rules (void);
 433
 434 void build_vpath_lists (void);
 435 void construct_vpath_list (char *pattern, char *dirpath);
 436 const char *vpath_search (const char *file, FILE_TIMESTAMP *mtime_ptr,
 437                           unsigned int* vpath_index, unsigned int* path_index);
 438 int gpath_search (const char *file, unsigned int len);
 439
 440 void construct_include_path (const char **arg_dirs);
 441
 442 void user_access (void);
 443 void make_access (void);
 444 void child_access (void);
 445
 446 void close_stdout (void);
 447
 448 char *strip_whitespace (const char **begpp, const char **endpp);
 449
 450 /* String caching  */
 451 void strcache_init (void);
 452 void strcache_print_stats (const char *prefix);
 453 int strcache_iscached (const char *str);
 454 const char *strcache_add (const char *str);
 455 const char *strcache_add_len (const char *str, int len);
 456 int strcache_setbufsize (int size);
 457
 458 #ifdef  HAVE_VFORK_H
 459 # include <vfork.h>
 460 #endif
 461
 462 /* We omit these declarations on non-POSIX systems which define _POSIX_VERSION,
 463    because such systems often declare them in header files anyway.  */
 464
 465 #if !defined (__GNU_LIBRARY__) && !defined (POSIX) && !defined (_POSIX_VERSION) && !defined(WINDOWS32)
 466
 467 long int atol ();
 468 # ifndef VMS
 469 long int lseek ();
 470 # endif
 471
 472 #endif  /* Not GNU C library or POSIX.  */
 473
 474 #ifdef  HAVE_GETCWD
 475 # if !defined(VMS) && !defined(__DECC)
 476 char *getcwd ();
 477 # endif
 478 #else
 479 char *getwd ();
 480 # define getcwd(buf, len)       getwd (buf)
 481 #endif
 482
 483 #if !HAVE_STRCASECMP
 484 # if HAVE_STRICMP
 485 #  define strcasecmp stricmp
 486 # elif HAVE_STRCMPI
 487 #  define strcasecmp strcmpi
 488 # else
 489 /* Create our own, in misc.c */
 490 int strcasecmp (const char *s1, const char *s2);
 491 # endif
 492 #endif
 493
 494 #if !HAVE_STRNCASECMP
 495 # if HAVE_STRNICMP
 496 #  define strncasecmp strnicmp
 497 # elif HAVE_STRNCMPI
 498 #  define strncasecmp strncmpi
 499 # else
 500 /* Create our own, in misc.c */
 501 int strncasecmp (const char *s1, const char *s2, int n);
 502 # endif
 503 #endif
 504
 505 extern const struct floc *reading_file;
 506 extern const struct floc **expanding_var;
 507
 508 extern char **environ;
 509
 510 extern int just_print_flag, silent_flag, ignore_errors_flag, keep_going_flag;
 511 extern int print_data_base_flag, question_flag, touch_flag, always_make_flag;
 512 extern int env_overrides, no_builtin_rules_flag, no_builtin_variables_flag;
 513 extern int print_version_flag, print_directory_flag, check_symlink_flag;
 514 extern int warn_undefined_variables_flag, posix_pedantic, not_parallel;
 515 extern int second_expansion, clock_skew_detected, rebuilding_makefiles;
 516 extern int one_shell;
 517
 518 /* can we run commands via 'sh -c xxx' or must we use batch files? */
 519 extern int batch_mode_shell;
 520
 521 /* Resetting the command script introduction prefix character.  */
 522 #define RECIPEPREFIX_NAME          ".RECIPEPREFIX"
 523 #define RECIPEPREFIX_DEFAULT       '\t'
 524 extern char cmd_prefix;
 525
 526 extern unsigned int job_slots;
 527 extern int job_fds[2];
 528 extern int job_rfd;
 529 #ifndef NO_FLOAT
 530 extern double max_load_average;
 531 #else
 532 extern int max_load_average;
 533 #endif
 534
 535 extern char *program;
 536 extern char *starting_directory;
 537 extern unsigned int makelevel;
 538 extern char *version_string, *remote_description, *make_host;
 539
 540 extern unsigned int commands_started;
 541
 542 extern int handling_fatal_signal;
 543
 544
 545 #ifndef MIN
 546 #define MIN(_a,_b) ((_a)<(_b)?(_a):(_b))
 547 #endif
 548 #ifndef MAX
 549 #define MAX(_a,_b) ((_a)>(_b)?(_a):(_b))
 550 #endif
 551
 552 #ifdef VMS
 553 #  define MAKE_SUCCESS 1
 554 #  define MAKE_TROUBLE 2
 555 #  define MAKE_FAILURE 3
 556 #else
 557 #  define MAKE_SUCCESS 0
 558 #  define MAKE_TROUBLE 1
 559 #  define MAKE_FAILURE 2
 560 #endif
 561
 562 /* Set up heap debugging library dmalloc.  */
 563
 564 #ifdef HAVE_DMALLOC_H
 565 #include <dmalloc.h>
 566 #endif
 567
 568 #ifndef initialize_main
 569 # ifdef __EMX__
 570 #  define initialize_main(pargc, pargv) \
 571                           { _wildcard(pargc, pargv); _response(pargc, pargv); }
 572 # else
 573 #  define initialize_main(pargc, pargv)
 574 # endif
 575 #endif
 576
 577 #ifdef __EMX__
 578 # if !defined chdir
 579 #  define chdir _chdir2
 580 # endif
 581 # if !defined getcwd
 582 #  define getcwd _getcwd2
 583 # endif
 584
 585 /* NO_CHDIR2 causes make not to use _chdir2() and _getcwd2() instead of
 586    chdir() and getcwd(). This avoids some error messages for the
 587    make testsuite but restricts the drive letter support. */
 588 # ifdef NO_CHDIR2
 589 #  warning NO_CHDIR2: usage of drive letters restricted
 590 #  undef chdir
 591 #  undef getcwd
 592 # endif
 593 #endif
 594
 595 #ifndef initialize_main
 596 # define initialize_main(pargc, pargv)
 597 #endif
 598
 599
 600 /* Some systems (like Solaris, PTX, etc.) do not support the SA_RESTART flag
 601    properly according to POSIX.  So, we try to wrap common system calls with
 602    checks for EINTR.  Note that there are still plenty of system calls that
 603    can fail with EINTR but this, reportedly, gets the vast majority of
 604    failure cases.  If you still experience failures you'll need to either get
 605    a system where SA_RESTART works, or you need to avoid -j.  */
 606
 607 #define EINTRLOOP(_v,_c)   while (((_v)=_c)==-1 && errno==EINTR)
 608
 609 /* While system calls that return integers are pretty consistent about
 610    returning -1 on failure and setting errno in that case, functions that
 611    return pointers are not always so well behaved.  Sometimes they return
 612    NULL for expected behavior: one good example is readdir() which returns
 613    NULL at the end of the directory--and _doesn't_ reset errno.  So, we have
 614    to do it ourselves here.  */
 615
 616 #define ENULLLOOP(_v,_c)   do { errno = 0; (_v) = _c; } \
 617                            while((_v)==0 && errno==EINTR)