make.h@ 53

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1	/* Miscellaneous global declarations and portability cruft for GNU Make.
2	Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
3	2002 Free Software Foundation, Inc.
4	This file is part of GNU Make.
5
6	GNU Make is free software; you can redistribute it and/or modify
7	it under the terms of the GNU General Public License as published by
8	the Free Software Foundation; either version 2, or (at your option)
9	any later version.
10
11	GNU Make is distributed in the hope that it will be useful,
12	but WITHOUT ANY WARRANTY; without even the implied warranty of
13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	GNU General Public License for more details.
15
16	You should have received a copy of the GNU General Public License
17	along with GNU Make; see the file COPYING. If not, write to
18	the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19	Boston, MA 02111-1307, USA. */
20
21	/* We use <config.h> instead of "config.h" so that a compilation
22	using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
23	(which it would do because make.h was found in $srcdir). */
24	#include <config.h>
25	#undef HAVE_CONFIG_H
26	#define HAVE_CONFIG_H 1
27
28	/* AIX requires this to be the first thing in the file. */
29	#ifndef __GNUC__
30	# if HAVE_ALLOCA_H
31	# include <alloca.h>
32	# else
33	# ifdef _AIX
34	#pragma alloca
35	# else
36	# ifndef alloca /* predefined by HP cc +Olibcalls */
37	char *alloca ();
38	# endif
39	# endif
40	# endif
41	#endif
42
43
44	/* Use prototypes if available. */
45	#if defined (__cplusplus) \|\| (defined (__STDC__) && __STDC__)
46	# undef PARAMS
47	# define PARAMS(protos) protos
48	#else /* Not C++ or ANSI C. */
49	# undef PARAMS
50	# define PARAMS(protos) ()
51	#endif /* C++ or ANSI C. */
52
53	/* Specify we want GNU source code. This must be defined before any
54	system headers are included. */
55
56	#define _GNU_SOURCE 1
57
58
59	#ifdef CRAY
60	/* This must happen before #include <signal.h> so
61	that the declaration therein is changed. */
62	# define signal bsdsignal
63	#endif
64
65	/* If we're compiling for the dmalloc debugger, turn off string inlining. */
66	#if defined(HAVE_DMALLOC_H) && defined(__GNUC__)
67	# define __NO_STRING_INLINES
68	#endif
69
70	#include <sys/types.h>
71	#include <sys/stat.h>
72	#include <signal.h>
73	#include <stdio.h>
74	#include <ctype.h>
75	#ifdef HAVE_SYS_TIMEB_H
76	/* SCO 3.2 "devsys 4.2" has a prototype for `ftime' in <time.h> that bombs
77	unless <sys/timeb.h> has been included first. Does every system have a
78	<sys/timeb.h>? If any does not, configure should check for it. */
79	# include <sys/timeb.h>
80	#endif
81
82	#if TIME_WITH_SYS_TIME
83	# include <sys/time.h>
84	# include <time.h>
85	#else
86	# if HAVE_SYS_TIME_H
87	# include <sys/time.h>
88	# else
89	# include <time.h>
90	# endif
91	#endif
92
93	#include <errno.h>
94
95	#ifndef errno
96	extern int errno;
97	#endif
98
99	#ifndef isblank
100	# define isblank(c) ((c) == ' ' \|\| (c) == '\t')
101	#endif
102
103	#ifdef HAVE_UNISTD_H
104	# include <unistd.h>
105	/* Ultrix's unistd.h always defines _POSIX_VERSION, but you only get
106	POSIX.1 behavior with `cc -YPOSIX', which predefines POSIX itself! */
107	# if defined (_POSIX_VERSION) && !defined (ultrix) && !defined (VMS)
108	# define POSIX 1
109	# endif
110	#endif
111
112	/* Some systems define _POSIX_VERSION but are not really POSIX.1. */
113	#if (defined (butterfly) \|\| defined (__arm) \|\| (defined (__mips) && defined (_SYSTYPE_SVR3)) \|\| (defined (sequent) && defined (i386)))
114	# undef POSIX
115	#endif
116
117	#if !defined (POSIX) && defined (_AIX) && defined (_POSIX_SOURCE)
118	# define POSIX 1
119	#endif
120
121	#ifndef RETSIGTYPE
122	# define RETSIGTYPE void
123	#endif
124
125	#ifndef sigmask
126	# define sigmask(sig) (1 << ((sig) - 1))
127	#endif
128
129	#ifndef HAVE_SA_RESTART
130	# define SA_RESTART 0
131	#endif
132
133	#ifdef HAVE_LIMITS_H
134	# include <limits.h>
135	#endif
136	#ifdef HAVE_SYS_PARAM_H
137	# include <sys/param.h>
138	#endif
139
140	#ifndef PATH_MAX
141	# ifndef POSIX
142	# define PATH_MAX MAXPATHLEN
143	# endif
144	#endif
145	#ifndef MAXPATHLEN
146	# define MAXPATHLEN 1024
147	#endif
148
149	#ifdef PATH_MAX
150	# define GET_PATH_MAX PATH_MAX
151	# define PATH_VAR(var) char var[PATH_MAX]
152	#else
153	# define NEED_GET_PATH_MAX 1
154	# define GET_PATH_MAX (get_path_max ())
155	# define PATH_VAR(var) char var = (char ) alloca (GET_PATH_MAX)
156	extern unsigned int get_path_max PARAMS ((void));
157	#endif
158
159	#ifndef CHAR_BIT
160	# define CHAR_BIT 8
161	#endif
162
163	/* Nonzero if the integer type T is signed. */
164	#define INTEGER_TYPE_SIGNED(t) ((t) -1 < 0)
165
166	/* The minimum and maximum values for the integer type T.
167	Use ~ (t) 0, not -1, for portability to 1's complement hosts. */
168	#define INTEGER_TYPE_MINIMUM(t) \
169	(! INTEGER_TYPE_SIGNED (t) ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))
170	#define INTEGER_TYPE_MAXIMUM(t) (~ (t) 0 - INTEGER_TYPE_MINIMUM (t))
171
172	#ifndef CHAR_MAX
173	# define CHAR_MAX INTEGER_TYPE_MAXIMUM (char)
174	#endif
175
176	#ifdef STAT_MACROS_BROKEN
177	# ifdef S_ISREG
178	# undef S_ISREG
179	# endif
180	# ifdef S_ISDIR
181	# undef S_ISDIR
182	# endif
183	#endif /* STAT_MACROS_BROKEN. */
184
185	#ifndef S_ISREG
186	# define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
187	#endif
188	#ifndef S_ISDIR
189	# define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
190	#endif
191
192	#ifdef VMS
193	# include <types.h>
194	# include <unixlib.h>
195	# include <unixio.h>
196	# include <perror.h>
197	/* Needed to use alloca on VMS. */
198	# include <builtins.h>
199	#endif
200
201	#ifndef __attribute__
202	/* This feature is available in gcc versions 2.5 and later. */
203	# if __GNUC__ < 2 \|\| (__GNUC__ == 2 && __GNUC_MINOR__ < 5) \|\| __STRICT_ANSI__
204	# define __attribute__(x)
205	# endif
206	/* The __-protected variants of `format' and `printf' attributes
207	are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
208	# if __GNUC__ < 2 \|\| (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
209	# define __format__ format
210	# define __printf__ printf
211	# endif
212	#endif
213
214	#if defined (STDC_HEADERS) \|\| defined (__GNU_LIBRARY__)
215	# include <stdlib.h>
216	# include <string.h>
217	# define ANSI_STRING 1
218	#else /* No standard headers. */
219	# ifdef HAVE_STRING_H
220	# include <string.h>
221	# define ANSI_STRING 1
222	# else
223	# include <strings.h>
224	# endif
225	# ifdef HAVE_MEMORY_H
226	# include <memory.h>
227	# endif
228	# ifdef HAVE_STDLIB_H
229	# include <stdlib.h>
230	# else
231	extern char *malloc PARAMS ((int));
232	extern char realloc PARAMS ((char , int));
233	extern void free PARAMS ((char *));
234
235	extern void abort PARAMS ((void)) __attribute__ ((noreturn));
236	extern void exit PARAMS ((int)) __attribute__ ((noreturn));
237	# endif /* HAVE_STDLIB_H. */
238
239	#endif /* Standard headers. */
240
241	/* These should be in stdlib.h. Make sure we have them. */
242	#ifndef EXIT_SUCCESS
243	# define EXIT_SUCCESS 0
244	#endif
245	#ifndef EXIT_FAILURE
246	# define EXIT_FAILURE 0
247	#endif
248
249	#ifdef ANSI_STRING
250
251	# ifndef bcmp
252	# define bcmp(s1, s2, n) memcmp ((s1), (s2), (n))
253	# endif
254	# ifndef bzero
255	# define bzero(s, n) memset ((s), 0, (n))
256	# endif
257	# if defined(HAVE_MEMMOVE) && !defined(bcopy)
258	# define bcopy(s, d, n) memmove ((d), (s), (n))
259	# endif
260
261	#else /* Not ANSI_STRING. */
262
263	# ifndef HAVE_STRCHR
264	# define strchr(s, c) index((s), (c))
265	# define strrchr(s, c) rindex((s), (c))
266	# endif
267
268	# ifndef bcmp
269	extern int bcmp PARAMS ((const char , const char , int));
270	# endif
271	# ifndef bzero
272	extern void bzero PARAMS ((char *, int));
273	#endif
274	# ifndef bcopy
275	extern void bcopy PARAMS ((const char b1, char b2, int));
276	# endif
277
278	#endif /* ANSI_STRING. */
279	#undef ANSI_STRING
280
281	/* SCO Xenix has a buggy macro definition in <string.h>. */
282	#undef strerror
283
284	#if !defined(ANSI_STRING) && !defined(__DECC)
285	extern char *strerror PARAMS ((int errnum));
286	#endif
287
288	#if HAVE_INTTYPES_H
289	# include <inttypes.h>
290	#endif
291	#define FILE_TIMESTAMP uintmax_t
292
293	#if !defined(HAVE_STRSIGNAL)
294	extern char *strsignal PARAMS ((int signum));
295	#endif
296
297	/* ISDIGIT offers the following features:
298	- Its arg may be any int or unsigned int; it need not be an unsigned char.
299	- It's guaranteed to evaluate its argument exactly once.
300	NOTE! Make relies on this behavior, don't change it!
301	- It's typically faster.
302	POSIX 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
303	only '0' through '9' are digits. Prefer ISDIGIT to isdigit() unless
304	it's important to use the locale's definition of `digit' even when the
305	host does not conform to POSIX. */
306	#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
307
308	#ifndef iAPX286
309	# define streq(a, b) \
310	((a) == (b) \|\| \
311	((a) == (b) && (*(a) == '\0' \|\| !strcmp ((a) + 1, (b) + 1))))
312	# ifdef HAVE_CASE_INSENSITIVE_FS
313	/* This is only used on Windows/DOS platforms, so we assume strcmpi(). */
314	# define strieq(a, b) \
315	((a) == (b) \
316	\|\| (tolower((unsigned char)(a)) == tolower((unsigned char)(b)) \
317	&& (*(a) == '\0' \|\| !strcmpi ((a) + 1, (b) + 1))))
318	# else
319	# define strieq(a, b) streq(a, b)
320	# endif
321	#else
322	/* Buggy compiler can't handle this. */
323	# define streq(a, b) (strcmp ((a), (b)) == 0)
324	# define strieq(a, b) (strcmp ((a), (b)) == 0)
325	#endif
326	#define strneq(a, b, l) (strncmp ((a), (b), (l)) == 0)
327	#ifdef VMS
328	extern int strcmpi (const char ,const char );
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	/* Handle gettext and locales. */
338
339	#if HAVE_LOCALE_H
340	# include <locale.h>
341	#else
342	# define setlocale(category, locale)
343	#endif
344
345	#include <gettext.h>
346
347	#define _(msgid) gettext (msgid)
348	#define N_(msgid) gettext_noop (msgid)
349	#define S_(msg1,msg2,num) ngettext (msg1,msg2,num)
350
351	/* Handle other OSs. */
352	#if defined(HAVE_DOS_PATHS)
353	# define PATH_SEPARATOR_CHAR ';'
354	#elif defined(VMS)
355	# define PATH_SEPARATOR_CHAR ','
356	#else
357	# define PATH_SEPARATOR_CHAR ':'
358	#endif
359
360	#ifdef WINDOWS32
361	# include <fcntl.h>
362	# include <malloc.h>
363	# define pipe(p) _pipe(p, 512, O_BINARY)
364	# define kill(pid,sig) w32_kill(pid,sig)
365
366	extern void sync_Path_environment(void);
367	extern int kill(int pid, int sig);
368	extern int safe_stat(char file, struct stat sb);
369	extern char end_of_token_w32(char s, char stopchar);
370	extern int find_and_set_default_shell(char *token);
371
372	/* indicates whether or not we have Bourne shell */
373	extern int no_default_sh_exe;
374
375	/* is default_shell unixy? */
376	extern int unixy_shell;
377	#endif /* WINDOWS32 */
378
379	struct floc
380	{
381	char *filenm;
382	unsigned long lineno;
383	};
384	#define NILF ((struct floc *)0)
385
386	#define STRING_SIZE_TUPLE(_s) (_s), (sizeof (_s)-1)
387
388
389
390	/* Fancy processing for variadic functions in both ANSI and pre-ANSI
391	compilers. */
392	#if defined __STDC__ && __STDC__
393	extern void message (int prefix, const char *fmt, ...)
394	__attribute__ ((__format__ (__printf__, 2, 3)));
395	extern void error (const struct floc flocp, const char fmt, ...)
396	__attribute__ ((__format__ (__printf__, 2, 3)));
397	extern void fatal (const struct floc flocp, const char fmt, ...)
398	__attribute__ ((noreturn, __format__ (__printf__, 2, 3)));
399	#else
400	extern void message ();
401	extern void error ();
402	extern void fatal ();
403	#endif
404
405	extern void die PARAMS ((int)) __attribute__ ((noreturn));
406	extern void log_working_directory PARAMS ((int));
407	extern void pfatal_with_name PARAMS ((const char *)) __attribute__ ((noreturn));
408	extern void perror_with_name PARAMS ((const char , const char ));
409	extern char savestring PARAMS ((const char , unsigned int));
410	extern char concat PARAMS ((const char , const char , const char ));
411	extern char *xmalloc PARAMS ((unsigned int));
412	extern char xrealloc PARAMS ((char , unsigned int));
413	extern char xstrdup PARAMS ((const char ));
414	extern char find_next_token PARAMS ((char , unsigned int ));
415	extern char next_token PARAMS ((const char ));
416	extern char end_of_token PARAMS ((char ));
417	extern void collapse_continuations PARAMS ((char *));
418	extern void remove_comments PARAMS((char *));
419	extern char sindex PARAMS ((const char , unsigned int, \
420	const char *, unsigned int));
421	extern char lindex PARAMS ((const char , const char *, int));
422	extern int alpha_compare PARAMS ((const void , const void ));
423	extern void print_spaces PARAMS ((unsigned int));
424	extern char find_char_unquote PARAMS ((char , int, int, int));
425	extern char find_percent PARAMS ((char ));
426	extern FILE open_tmpfile PARAMS ((char , const char ));
427
428	#ifndef NO_ARCHIVES
429	extern int ar_name PARAMS ((char *));
430	extern void ar_parse_name PARAMS ((char , char , char *));
431	extern int ar_touch PARAMS ((char *));
432	extern time_t ar_member_date PARAMS ((char *));
433	#endif
434
435	extern int dir_file_exists_p PARAMS ((char , char ));
436	extern int file_exists_p PARAMS ((char *));
437	extern int file_impossible_p PARAMS ((char *));
438	extern void file_impossible PARAMS ((char *));
439	extern char dir_name PARAMS ((char ));
440	extern void hash_init_directories PARAMS ((void));
441
442	extern void define_default_variables PARAMS ((void));
443	extern void set_default_suffixes PARAMS ((void));
444	extern void install_default_suffix_rules PARAMS ((void));
445	extern void install_default_implicit_rules PARAMS ((void));
446
447	extern void build_vpath_lists PARAMS ((void));
448	extern void construct_vpath_list PARAMS ((char pattern, char dirpath));
449	extern int vpath_search PARAMS ((char *file, FILE_TIMESTAMP mtime_ptr));
450	extern int gpath_search PARAMS ((char *file, int len));
451
452	extern void construct_include_path PARAMS ((char **arg_dirs));
453
454	extern void user_access PARAMS ((void));
455	extern void make_access PARAMS ((void));
456	extern void child_access PARAMS ((void));
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	extern long int atol ();
468	# ifndef VMS
469	extern 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	extern char *getcwd ();
477	#endif
478	#else
479	extern char *getwd ();
480	# define getcwd(buf, len) getwd (buf)
481	#endif
482
483	extern const struct floc *reading_file;
484
485	extern char **environ;
486
487	extern int just_print_flag, silent_flag, ignore_errors_flag, keep_going_flag;
488	extern int print_data_base_flag, question_flag, touch_flag, always_make_flag;
489	extern int env_overrides, no_builtin_rules_flag, no_builtin_variables_flag;
490	extern int print_version_flag, print_directory_flag;
491	extern int warn_undefined_variables_flag, posix_pedantic, not_parallel;
492	extern int clock_skew_detected;
493
494	/* can we run commands via 'sh -c xxx' or must we use batch files? */
495	extern int batch_mode_shell;
496
497	extern unsigned int job_slots;
498	extern int job_fds[2];
499	extern int job_rfd;
500	#ifndef NO_FLOAT
501	extern double max_load_average;
502	#else
503	extern int max_load_average;
504	#endif
505
506	extern char *program;
507	extern char *starting_directory;
508	extern unsigned int makelevel;
509	extern char version_string, remote_description, *make_host;
510
511	extern unsigned int commands_started;
512
513	extern int handling_fatal_signal;
514
515
516	#ifndef MIN
517	#define MIN(_a,_b) ((_a)<(_b)?(_a):(_b))
518	#endif
519	#ifndef MAX
520	#define MAX(_a,_b) ((_a)>(_b)?(_a):(_b))
521	#endif
522
523	#ifdef VMS
524	# define MAKE_SUCCESS 1
525	# define MAKE_TROUBLE 2
526	# define MAKE_FAILURE 3
527	#else
528	# define MAKE_SUCCESS 0
529	# define MAKE_TROUBLE 1
530	# define MAKE_FAILURE 2
531	#endif
532
533	/* Set up heap debugging library dmalloc. */
534
535	#ifdef HAVE_DMALLOC_H
536	#include <dmalloc.h>
537	#endif
538
539	#ifndef initialize_main
540	# ifdef __EMX__
541	# define initialize_main(pargc, pargv) \
542	{ _wildcard(pargc, pargv); _response(pargc, pargv); }
543	# else
544	# define initialize_main(pargc, pargv)
545	# endif
546	#endif
547
548
549	#ifdef __EMX__
550	# if !HAVE_STRCASECMP
551	# define strcasecmp stricmp
552	# endif
553
554	# if !defined chdir
555	# define chdir _chdir2
556	# endif
557	# if !defined getcwd
558	# define getcwd _getcwd2
559	# endif
560
561	/* NO_CHDIR2 causes make not to use _chdir2() and _getcwd2() instead of
562	chdir() and getcwd(). This avoids some error messages for the
563	make testsuite but restricts the drive letter support. */
564	# ifdef NO_CHDIR2
565	# warning NO_CHDIR2: usage of drive letters restricted
566	# undef chdir
567	# undef getcwd
568	# endif
569	#endif
570
571	#ifndef initialize_main
572	# define initialize_main(pargc, pargv)
573	#endif
574
575
576	/* Some systems (like Solaris, PTX, etc.) do not support the SA_RESTART flag
577	properly according to POSIX. So, we try to wrap common system calls with
578	checks for EINTR. Note that there are still plenty of system calls that
579	can fail with EINTR but this, reportedly, gets the vast majority of
580	failure cases. If you still experience failures you'll need to either get
581	a system where SA_RESTART works, or you need to avoid -j. */
582
583	#define EINTRLOOP(_v,_c) while (((_v)=_c)==-1 && errno==EINTR)
584
585	/* While system calls that return integers are pretty consistent about
586	returning -1 on failure and setting errno in that case, functions that
587	return pointers are not always so well behaved. Sometimes they return
588	NULL for expected behavior: one good example is readdir() which returns
589	NULL at the end of the directory--and _doesn't_ reset errno. So, we have
590	to do it ourselves here. */
591
592	#define ENULLLOOP(_v,_c) do{ errno = 0; \
593	while (((_v)=_c)==0 && errno==EINTR); }while(0)
594

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