make.h

   1 /* Miscellaneous global declarations and portability cruft for GNU Make.
   2 Copyright (C) 1988,89,90,91,92,93,94,95,96,97,99 Free Software Foundation, Inc.
   3 This file is part of GNU Make.
   4
   5 GNU Make is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 GNU Make is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with GNU Make; see the file COPYING.  If not, write to
  17 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.  */
  19
  20 /* AIX requires this to be the first thing in the file.  */
  21 #if defined (_AIX) && !defined (__GNUC__)
  22  #pragma alloca
  23 #endif
  24
  25 /* We use <config.h> instead of "config.h" so that a compilation
  26    using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
  27    (which it would do because make.h was found in $srcdir).  */
  28 #include <config.h>
  29 #undef  HAVE_CONFIG_H
  30 #define HAVE_CONFIG_H 1
  31
  32
  33 /* Use prototypes if available.  */
  34 #if defined (__cplusplus) || (defined (__STDC__) && __STDC__)
  35 # undef  PARAMS
  36 # define PARAMS(protos)  protos
  37 #else /* Not C++ or ANSI C.  */
  38 # undef  PARAMS
  39 # define PARAMS(protos)  ()
  40 #endif /* C++ or ANSI C.  */
  41
  42
  43 #include "gettext.h"
  44 #define _(Text)     gettext (Text)
  45 #define N_(Text)    gettext_noop (Text)
  46
  47 #if !HAVE_SETLOCALE
  48 # define setlocale(Category, Locale) /* empty */
  49 #endif
  50
  51
  52 #ifdef  CRAY
  53 /* This must happen before #include <signal.h> so
  54    that the declaration therein is changed.  */
  55 # define signal bsdsignal
  56 #endif
  57
  58 /* If we're compiling for the dmalloc debugger, turn off string inlining.  */
  59 #if defined(HAVE_DMALLOC_H) && defined(__GNUC__)
  60 # define __NO_STRING_INLINES
  61 #endif
  62
  63 #define _GNU_SOURCE 1
  64 #include <sys/types.h>
  65 #include <sys/stat.h>
  66 #include <signal.h>
  67 #include <stdio.h>
  68 #include <ctype.h>
  69 #ifdef HAVE_SYS_TIMEB_H
  70 /* SCO 3.2 "devsys 4.2" has a prototype for `ftime' in <time.h> that bombs
  71    unless <sys/timeb.h> has been included first.  Does every system have a
  72    <sys/timeb.h>?  If any does not, configure should check for it.  */
  73 # include <sys/timeb.h>
  74 #endif
  75 #include <time.h>
  76 #include <errno.h>
  77
  78 #ifndef errno
  79 extern int errno;
  80 #endif
  81
  82 /* A shortcut for EINTR checking.  Note you should be careful when negating
  83    this!  That might not mean what you want if EINTR is not available.  */
  84 #ifdef EINTR
  85 # define EINTR_SET (errno == EINTR)
  86 #else
  87 # define EINTR_SET (0)
  88 #endif
  89
  90 #ifndef isblank
  91 # define isblank(c)     ((c) == ' ' || (c) == '\t')
  92 #endif
  93
  94 #ifdef  HAVE_UNISTD_H
  95 # include <unistd.h>
  96 /* Ultrix's unistd.h always defines _POSIX_VERSION, but you only get
  97    POSIX.1 behavior with `cc -YPOSIX', which predefines POSIX itself!  */
  98 # if defined (_POSIX_VERSION) && !defined (ultrix) && !defined (VMS)
  99 #  define POSIX 1
 100 # endif
 101 #endif
 102
 103 /* Some systems define _POSIX_VERSION but are not really POSIX.1.  */
 104 #if (defined (butterfly) || defined (__arm) || (defined (__mips) && defined (_SYSTYPE_SVR3)) || (defined (sequent) && defined (i386)))
 105 # undef POSIX
 106 #endif
 107
 108 #if !defined (POSIX) && defined (_AIX) && defined (_POSIX_SOURCE)
 109 # define POSIX 1
 110 #endif
 111
 112 #ifndef RETSIGTYPE
 113 # define RETSIGTYPE     void
 114 #endif
 115
 116 #ifndef sigmask
 117 # define sigmask(sig)   (1 << ((sig) - 1))
 118 #endif
 119
 120 #ifdef  HAVE_LIMITS_H
 121 # include <limits.h>
 122 #endif
 123 #ifdef  HAVE_SYS_PARAM_H
 124 # include <sys/param.h>
 125 #endif
 126
 127 #ifndef PATH_MAX
 128 # ifndef POSIX
 129 #  define PATH_MAX      MAXPATHLEN
 130 # endif
 131 #endif
 132 #ifndef MAXPATHLEN
 133 # define MAXPATHLEN 1024
 134 #endif
 135
 136 #ifdef  PATH_MAX
 137 # define GET_PATH_MAX   PATH_MAX
 138 # define PATH_VAR(var)  char var[PATH_MAX]
 139 #else
 140 # define NEED_GET_PATH_MAX 1
 141 # define GET_PATH_MAX   (get_path_max ())
 142 # define PATH_VAR(var)  char *var = (char *) alloca (GET_PATH_MAX)
 143 extern unsigned int get_path_max PARAMS ((void));
 144 #endif
 145
 146 #ifndef CHAR_BIT
 147 # define CHAR_BIT 8
 148 #endif
 149
 150 /* Nonzero if the integer type T is signed.  */
 151 #define INTEGER_TYPE_SIGNED(t) ((t) -1 < 0)
 152
 153 /* The minimum and maximum values for the integer type T.
 154    Use ~ (t) 0, not -1, for portability to 1's complement hosts.  */
 155 #define INTEGER_TYPE_MINIMUM(t) \
 156   (! INTEGER_TYPE_SIGNED (t) ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))
 157 #define INTEGER_TYPE_MAXIMUM(t) (~ (t) 0 - INTEGER_TYPE_MINIMUM (t))
 158
 159 #ifndef CHAR_MAX
 160 # define CHAR_MAX INTEGER_TYPE_MAXIMUM (char)
 161 #endif
 162
 163 #ifdef STAT_MACROS_BROKEN
 164 # ifdef S_ISREG
 165 #  undef S_ISREG
 166 # endif
 167 # ifdef S_ISDIR
 168 #  undef S_ISDIR
 169 # endif
 170 #endif  /* STAT_MACROS_BROKEN.  */
 171
 172 #ifndef S_ISREG
 173 # define S_ISREG(mode)  (((mode) & S_IFMT) == S_IFREG)
 174 #endif
 175 #ifndef S_ISDIR
 176 # define S_ISDIR(mode)  (((mode) & S_IFMT) == S_IFDIR)
 177 #endif
 178
 179 #ifdef VMS
 180 # include <types.h>
 181 # include <unixlib.h>
 182 # include <unixio.h>
 183 # include <perror.h>
 184 #endif
 185
 186 #ifndef __attribute__
 187 /* This feature is available in gcc versions 2.5 and later.  */
 188 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
 189 #  define __attribute__(x)
 190 # endif
 191 /* The __-protected variants of `format' and `printf' attributes
 192    are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
 193 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
 194 #  define __format__ format
 195 #  define __printf__ printf
 196 # endif
 197 #endif
 198
 199 #if defined (STDC_HEADERS) || defined (__GNU_LIBRARY__)
 200 # include <stdlib.h>
 201 # include <string.h>
 202 # define ANSI_STRING 1
 203 #else   /* No standard headers.  */
 204 # ifdef HAVE_STRING_H
 205 #  include <string.h>
 206 #  define ANSI_STRING 1
 207 # else
 208 #  include <strings.h>
 209 # endif
 210 # ifdef HAVE_MEMORY_H
 211 #  include <memory.h>
 212 # endif
 213 # ifdef HAVE_STDLIB_H
 214 #  include <stdlib.h>
 215 # else
 216 extern char *malloc PARAMS ((int));
 217 extern char *realloc PARAMS ((char *, int));
 218 extern void free PARAMS ((char *));
 219
 220 extern void abort PARAMS ((void)) __attribute__ ((noreturn));
 221 extern void exit PARAMS ((int)) __attribute__ ((noreturn));
 222 # endif /* HAVE_STDLIB_H.  */
 223
 224 #endif /* Standard headers.  */
 225
 226 #ifdef  ANSI_STRING
 227
 228 # ifndef bcmp
 229 #  define bcmp(s1, s2, n)   memcmp ((s1), (s2), (n))
 230 # endif
 231 # ifndef bzero
 232 #  define bzero(s, n)       memset ((s), 0, (n))
 233 # endif
 234 # if defined(HAVE_MEMMOVE) && !defined(bcopy)
 235 #  define bcopy(s, d, n)    memmove ((d), (s), (n))
 236 # endif
 237
 238 #else   /* Not ANSI_STRING.  */
 239
 240 # ifndef HAVE_STRCHR
 241 #  define strchr(s, c)      index((s), (c))
 242 #  define strrchr(s, c)     rindex((s), (c))
 243 # endif
 244
 245 # ifndef bcmp
 246 extern int bcmp PARAMS ((const char *, const char *, int));
 247 # endif
 248 # ifndef bzero
 249 extern void bzero PARAMS ((char *, int));
 250 #endif
 251 # ifndef bcopy
 252 extern void bcopy PARAMS ((const char *b1, char *b2, int));
 253 # endif
 254
 255 #endif  /* ANSI_STRING.  */
 256 #undef  ANSI_STRING
 257
 258 /* SCO Xenix has a buggy macro definition in <string.h>.  */
 259 #undef  strerror
 260
 261 #if !defined(ANSI_STRING) && !defined(__DECC)
 262 extern char *strerror PARAMS ((int errnum));
 263 #endif
 264
 265 #ifdef __GNUC__
 266 # undef alloca
 267 # define alloca(n)      __builtin_alloca (n)
 268 #else   /* Not GCC.  */
 269 # ifdef HAVE_ALLOCA_H
 270 #  include <alloca.h>
 271 # else /* Not HAVE_ALLOCA_H.  */
 272 #  ifndef _AIX
 273 extern char *alloca ();
 274 #  endif /* Not AIX.  */
 275 # endif /* HAVE_ALLOCA_H.  */
 276 #endif /* GCC.  */
 277
 278 #ifdef ST_MTIM_NSEC
 279 # if HAVE_INTTYPES_H
 280 #  include <inttypes.h>
 281 # endif
 282 # define FILE_TIMESTAMP uintmax_t
 283 #else
 284 # define FILE_TIMESTAMP time_t
 285 #endif
 286
 287 /* ISDIGIT offers the following features:
 288    - Its arg may be any int or unsigned int; it need not be an unsigned char.
 289    - It's guaranteed to evaluate its argument exactly once.
 290       NOTE!  Make relies on this behavior, don't change it!
 291    - It's typically faster.
 292    Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
 293    only '0' through '9' are digits.  Prefer ISDIGIT to isdigit() unless
 294    it's important to use the locale's definition of `digit' even when the
 295    host does not conform to Posix.  */
 296 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
 297
 298 #ifndef iAPX286
 299 # define streq(a, b) \
 300    ((a) == (b) || \
 301     (*(a) == *(b) && (*(a) == '\0' || !strcmp ((a) + 1, (b) + 1))))
 302 # ifdef HAVE_CASE_INSENSITIVE_FS
 303 /* This is only used on Windows/DOS platforms, so we assume strcmpi().  */
 304 #  define strieq(a, b) \
 305     ((a) == (b) \
 306      || (tolower((unsigned char)*(a)) == tolower((unsigned char)*(b)) \
 307          && (*(a) == '\0' || !strcmpi ((a) + 1, (b) + 1))))
 308 # else
 309 #  define strieq(a, b) streq(a, b)
 310 # endif
 311 #else
 312 /* Buggy compiler can't handle this.  */
 313 # define streq(a, b) (strcmp ((a), (b)) == 0)
 314 # define strieq(a, b) (strcmp ((a), (b)) == 0)
 315 #endif
 316 #define strneq(a, b, l) (strncmp ((a), (b), (l)) == 0)
 317 #ifdef  VMS
 318 extern int strcmpi (const char *,const char *);
 319 #endif
 320
 321 /* Add to VAR the hashing value of C, one character in a name.  */
 322 #define HASH(var, c) \
 323   ((var += (c)), (var = ((var) << 7) + ((var) >> 20)))
 324 #ifdef HAVE_CASE_INSENSITIVE_FS /* Fold filenames */
 325 # define HASHI(var, c) \
 326    ((var += tolower((unsigned char)(c))), (var = ((var) << 7) + ((var) >> 20)))
 327 #else
 328 # define HASHI(var, c) HASH(var,c)
 329 #endif
 330
 331 #if defined(__GNUC__) || defined(ENUM_BITFIELDS)
 332 # define ENUM_BITFIELD(bits)    :bits
 333 #else
 334 # define ENUM_BITFIELD(bits)
 335 #endif
 336
 337 #if defined(__MSDOS__) || defined(WINDOWS32)
 338 # define PATH_SEPARATOR_CHAR ';'
 339 #else
 340 # if defined(VMS)
 341 #  define PATH_SEPARATOR_CHAR ','
 342 # else
 343 #  define PATH_SEPARATOR_CHAR ':'
 344 # endif
 345 #endif
 346
 347 #ifdef WINDOWS32
 348 # include <fcntl.h>
 349 # include <malloc.h>
 350 # define pipe(p) _pipe(p, 512, O_BINARY)
 351 # define kill(pid,sig) w32_kill(pid,sig)
 352
 353 extern void sync_Path_environment(void);
 354 extern int kill(int pid, int sig);
 355 extern int safe_stat(char *file, struct stat *sb);
 356 extern char *end_of_token_w32(char *s, char stopchar);
 357 extern int find_and_set_default_shell(char *token);
 358
 359 /* indicates whether or not we have Bourne shell */
 360 extern int no_default_sh_exe;
 361
 362 /* is default_shell unixy? */
 363 extern int unixy_shell;
 364 #endif  /* WINDOWS32 */
 365
 366 struct floc
 367   {
 368     char *filenm;
 369     unsigned long lineno;
 370   };
 371 #define NILF ((struct floc *)0)
 372
 373 \f
 374 /* Fancy processing for variadic functions in both ANSI and pre-ANSI
 375    compilers.  */
 376 #if defined __STDC__ && __STDC__
 377 extern void message (int prefix, const char *fmt, ...)
 378                      __attribute__ ((__format__ (__printf__, 2, 3)));
 379 extern void error (const struct floc *flocp, const char *fmt, ...)
 380                    __attribute__ ((__format__ (__printf__, 2, 3)));
 381 extern void fatal (const struct floc *flocp, const char *fmt, ...)
 382                    __attribute__ ((noreturn, __format__ (__printf__, 2, 3)));
 383 #else
 384 extern void message ();
 385 extern void error ();
 386 extern void fatal ();
 387 #endif
 388
 389 extern void die PARAMS ((int)) __attribute__ ((noreturn));
 390 extern void log_working_directory PARAMS ((int));
 391 extern void pfatal_with_name PARAMS ((char *)) __attribute__ ((noreturn));
 392 extern void perror_with_name PARAMS ((char *, char *));
 393 extern char *savestring PARAMS ((const char *, unsigned int));
 394 extern char *concat PARAMS ((char *, char *, char *));
 395 extern char *xmalloc PARAMS ((unsigned int));
 396 extern char *xrealloc PARAMS ((char *, unsigned int));
 397 extern char *xstrdup PARAMS ((const char *));
 398 extern char *find_next_token PARAMS ((char **, unsigned int *));
 399 extern char *next_token PARAMS ((char *));
 400 extern char *end_of_token PARAMS ((char *));
 401 extern void collapse_continuations PARAMS ((char *));
 402 extern void remove_comments PARAMS((char *));
 403 extern char *sindex PARAMS ((const char *, unsigned int, \
 404                              const char *, unsigned int));
 405 extern char *lindex PARAMS ((const char *, const char *, int));
 406 extern int alpha_compare PARAMS ((const void *, const void *));
 407 extern void print_spaces PARAMS ((unsigned int));
 408 extern char *find_char_unquote PARAMS ((char *, char *, int));
 409 extern char *find_percent PARAMS ((char *));
 410 extern FILE *open_tmpfile PARAMS ((char **, const char *));
 411
 412 #ifndef NO_ARCHIVES
 413 extern int ar_name PARAMS ((char *));
 414 extern void ar_parse_name PARAMS ((char *, char **, char **));
 415 extern int ar_touch PARAMS ((char *));
 416 extern time_t ar_member_date PARAMS ((char *));
 417 #endif
 418
 419 extern int dir_file_exists_p PARAMS ((char *, char *));
 420 extern int file_exists_p PARAMS ((char *));
 421 extern int file_impossible_p PARAMS ((char *));
 422 extern void file_impossible PARAMS ((char *));
 423 extern char *dir_name PARAMS ((char *));
 424
 425 extern void define_default_variables PARAMS ((void));
 426 extern void set_default_suffixes PARAMS ((void));
 427 extern void install_default_suffix_rules PARAMS ((void));
 428 extern void install_default_implicit_rules PARAMS ((void));
 429
 430 extern void build_vpath_lists PARAMS ((void));
 431 extern void construct_vpath_list PARAMS ((char *pattern, char *dirpath));
 432 extern int vpath_search PARAMS ((char **file, FILE_TIMESTAMP *mtime_ptr));
 433 extern int gpath_search PARAMS ((char *file, int len));
 434
 435 extern void construct_include_path PARAMS ((char **arg_dirs));
 436
 437 extern void user_access PARAMS ((void));
 438 extern void make_access PARAMS ((void));
 439 extern void child_access PARAMS ((void));
 440
 441 #ifdef  HAVE_VFORK_H
 442 # include <vfork.h>
 443 #endif
 444
 445 /* We omit these declarations on non-POSIX systems which define _POSIX_VERSION,
 446    because such systems often declare them in header files anyway.  */
 447
 448 #if !defined (__GNU_LIBRARY__) && !defined (POSIX) && !defined (_POSIX_VERSION) && !defined(WINDOWS32)
 449
 450 extern long int atol ();
 451 # ifndef VMS
 452 extern long int lseek ();
 453 # endif
 454
 455 #endif  /* Not GNU C library or POSIX.  */
 456
 457 #ifdef  HAVE_GETCWD
 458 # if !defined(VMS) && !defined(__DECC)
 459 extern char *getcwd ();
 460 #endif
 461 #else
 462 extern char *getwd ();
 463 # define getcwd(buf, len)       getwd (buf)
 464 #endif
 465
 466 extern const struct floc *reading_file;
 467
 468 extern char **environ;
 469
 470 extern int just_print_flag, silent_flag, ignore_errors_flag, keep_going_flag;
 471 extern int print_data_base_flag, question_flag, touch_flag;
 472 extern int env_overrides, no_builtin_rules_flag, no_builtin_variables_flag;
 473 extern int print_version_flag, print_directory_flag;
 474 extern int warn_undefined_variables_flag, posix_pedantic, not_parallel;
 475 extern int clock_skew_detected;
 476
 477 /* can we run commands via 'sh -c xxx' or must we use batch files? */
 478 extern int batch_mode_shell;
 479
 480 extern unsigned int job_slots;
 481 extern int job_fds[2];
 482 extern int job_rfd;
 483 #ifndef NO_FLOAT
 484 extern double max_load_average;
 485 #else
 486 extern int max_load_average;
 487 #endif
 488
 489 extern char *program;
 490 extern char *starting_directory;
 491 extern unsigned int makelevel;
 492 extern char *version_string, *remote_description;
 493
 494 extern unsigned int commands_started;
 495
 496 extern int handling_fatal_signal;
 497
 498
 499 #ifndef MIN
 500 #define MIN(_a,_b) ((_a)<(_b)?(_a):(_b))
 501 #endif
 502 #ifndef MAX
 503 #define MAX(_a,_b) ((_a)>(_b)?(_a):(_b))
 504 #endif
 505
 506 #ifdef VMS
 507 # ifndef EXIT_FAILURE
 508 #  define EXIT_FAILURE 3
 509 # endif
 510 # ifndef EXIT_SUCCESS
 511 #  define EXIT_SUCCESS 1
 512 # endif
 513 # ifndef EXIT_TROUBLE
 514 #  define EXIT_TROUBLE 2
 515 # endif
 516 #else
 517 # ifndef EXIT_FAILURE
 518 #  define EXIT_FAILURE 2
 519 # endif
 520 # ifndef EXIT_SUCCESS
 521 #  define EXIT_SUCCESS 0
 522 # endif
 523 # ifndef EXIT_TROUBLE
 524 #  define EXIT_TROUBLE 1
 525 # endif
 526 #endif
 527
 528 /* Set up heap debugging library dmalloc.  */
 529
 530 #ifdef HAVE_DMALLOC_H
 531 #include <dmalloc.h>
 532 #endif