make.h@ 281

Last change on this file since 281 was 281, checked in by bird, 20 years ago
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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	#define UNUSED __attribute__ ((unused))
214
215	#if defined (STDC_HEADERS) \|\| defined (__GNU_LIBRARY__)
216	# include <stdlib.h>
217	# include <string.h>
218	# define ANSI_STRING 1
219	#else /* No standard headers. */
220	# ifdef HAVE_STRING_H
221	# include <string.h>
222	# define ANSI_STRING 1
223	# else
224	# include <strings.h>
225	# endif
226	# ifdef HAVE_MEMORY_H
227	# include <memory.h>
228	# endif
229	# ifdef HAVE_STDLIB_H
230	# include <stdlib.h>
231	# else
232	extern char *malloc PARAMS ((int));
233	extern char realloc PARAMS ((char , int));
234	extern void free PARAMS ((char *));
235
236	extern void abort PARAMS ((void)) __attribute__ ((noreturn));
237	extern void exit PARAMS ((int)) __attribute__ ((noreturn));
238	# endif /* HAVE_STDLIB_H. */
239
240	#endif /* Standard headers. */
241
242	/* These should be in stdlib.h. Make sure we have them. */
243	#ifndef EXIT_SUCCESS
244	# define EXIT_SUCCESS 0
245	#endif
246	#ifndef EXIT_FAILURE
247	# define EXIT_FAILURE 0
248	#endif
249
250	#ifdef ANSI_STRING
251
252	# ifndef bcmp
253	# define bcmp(s1, s2, n) memcmp ((s1), (s2), (n))
254	# endif
255	# ifndef bzero
256	# define bzero(s, n) memset ((s), 0, (n))
257	# endif
258	# if defined(HAVE_MEMMOVE) && !defined(bcopy)
259	# define bcopy(s, d, n) memmove ((d), (s), (n))
260	# endif
261
262	#else /* Not ANSI_STRING. */
263
264	# ifndef HAVE_STRCHR
265	# define strchr(s, c) index((s), (c))
266	# define strrchr(s, c) rindex((s), (c))
267	# endif
268
269	# ifndef bcmp
270	extern int bcmp PARAMS ((const char , const char , int));
271	# endif
272	# ifndef bzero
273	extern void bzero PARAMS ((char *, int));
274	#endif
275	# ifndef bcopy
276	extern void bcopy PARAMS ((const char b1, char b2, int));
277	# endif
278
279	#endif /* ANSI_STRING. */
280	#undef ANSI_STRING
281
282	/* SCO Xenix has a buggy macro definition in <string.h>. */
283	#undef strerror
284
285	#if !defined(ANSI_STRING) && !defined(__DECC)
286	extern char *strerror PARAMS ((int errnum));
287	#endif
288
289	#if HAVE_INTTYPES_H
290	# include <inttypes.h>
291	#endif
292	#define FILE_TIMESTAMP uintmax_t
293
294	#if !defined(HAVE_STRSIGNAL)
295	extern char *strsignal PARAMS ((int signum));
296	#endif
297
298	/* ISDIGIT offers the following features:
299	- Its arg may be any int or unsigned int; it need not be an unsigned char.
300	- It's guaranteed to evaluate its argument exactly once.
301	NOTE! Make relies on this behavior, don't change it!
302	- It's typically faster.
303	POSIX 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
304	only '0' through '9' are digits. Prefer ISDIGIT to isdigit() unless
305	it's important to use the locale's definition of `digit' even when the
306	host does not conform to POSIX. */
307	#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
308
309	#ifndef iAPX286
310	# define streq(a, b) \
311	((a) == (b) \|\| \
312	((a) == (b) && (*(a) == '\0' \|\| !strcmp ((a) + 1, (b) + 1))))
313	# ifdef HAVE_CASE_INSENSITIVE_FS
314	/* This is only used on Windows/DOS platforms, so we assume strcmpi(). */
315	# define strieq(a, b) \
316	((a) == (b) \
317	\|\| (tolower((unsigned char)(a)) == tolower((unsigned char)(b)) \
318	&& (*(a) == '\0' \|\| !strcmpi ((a) + 1, (b) + 1))))
319	# else
320	# define strieq(a, b) streq(a, b)
321	# endif
322	#else
323	/* Buggy compiler can't handle this. */
324	# define streq(a, b) (strcmp ((a), (b)) == 0)
325	# define strieq(a, b) (strcmp ((a), (b)) == 0)
326	#endif
327	#define strneq(a, b, l) (strncmp ((a), (b), (l)) == 0)
328	#ifdef VMS
329	extern int strcmpi (const char ,const char );
330	#endif
331
332	#if defined(__GNUC__) \|\| defined(ENUM_BITFIELDS)
333	# define ENUM_BITFIELD(bits) :bits
334	#else
335	# define ENUM_BITFIELD(bits)
336	#endif
337
338	/* Handle gettext and locales. */
339
340	#if HAVE_LOCALE_H
341	# include <locale.h>
342	#else
343	# define setlocale(category, locale)
344	#endif
345
346	#include <gettext.h>
347
348	#define _(msgid) gettext (msgid)
349	#define N_(msgid) gettext_noop (msgid)
350	#define S_(msg1,msg2,num) ngettext (msg1,msg2,num)
351
352	/* Handle other OSs. */
353	#if defined(HAVE_DOS_PATHS)
354	# define PATH_SEPARATOR_CHAR ';'
355	#elif defined(VMS)
356	# define PATH_SEPARATOR_CHAR ','
357	#else
358	# define PATH_SEPARATOR_CHAR ':'
359	#endif
360
361	#ifdef WINDOWS32
362	# include <fcntl.h>
363	# include <malloc.h>
364	# define pipe(p) _pipe(p, 512, O_BINARY)
365	# define kill(pid,sig) w32_kill(pid,sig)
366
367	extern void sync_Path_environment(void);
368	extern int kill(int pid, int sig);
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	/* We have to have stdarg.h or varargs.h AND v*printf or doprnt to use
391	variadic versions of these functions. */
392
393	#if HAVE_STDARG_H \|\| HAVE_VARARGS_H
394	# if HAVE_VPRINTF \|\| HAVE_DOPRNT
395	# define USE_VARIADIC 1
396	# endif
397	#endif
398
399	#if HAVE_ANSI_COMPILER && USE_VARIADIC && HAVE_STDARG_H
400	extern void message (int prefix, const char *fmt, ...)
401	__attribute__ ((__format__ (__printf__, 2, 3)));
402	extern void error (const struct floc flocp, const char fmt, ...)
403	__attribute__ ((__format__ (__printf__, 2, 3)));
404	extern void fatal (const struct floc flocp, const char fmt, ...)
405	__attribute__ ((noreturn, __format__ (__printf__, 2, 3)));
406	#else
407	extern void message ();
408	extern void error ();
409	extern void fatal ();
410	#endif
411
412	extern void die PARAMS ((int)) __attribute__ ((noreturn));
413	extern void log_working_directory PARAMS ((int));
414	extern void pfatal_with_name PARAMS ((const char *)) __attribute__ ((noreturn));
415	extern void perror_with_name PARAMS ((const char , const char ));
416	extern char savestring PARAMS ((const char , unsigned int));
417	extern char concat PARAMS ((const char , const char , const char ));
418	extern char *xmalloc PARAMS ((unsigned int));
419	extern char xrealloc PARAMS ((char , unsigned int));
420	extern char xstrdup PARAMS ((const char ));
421	extern char find_next_token PARAMS ((char , unsigned int ));
422	extern char next_token PARAMS ((const char ));
423	extern char end_of_token PARAMS ((const char ));
424	extern void collapse_continuations PARAMS ((char *));
425	extern void remove_comments PARAMS((char *));
426	extern char lindex PARAMS ((const char , const char *, int));
427	extern int alpha_compare PARAMS ((const void , const void ));
428	extern void print_spaces PARAMS ((unsigned int));
429	extern char find_char_unquote PARAMS ((char , int, int, int));
430	extern char find_percent PARAMS ((char ));
431	extern FILE open_tmpfile PARAMS ((char , const char ));
432
433	#ifndef NO_ARCHIVES
434	extern int ar_name PARAMS ((char *));
435	extern void ar_parse_name PARAMS ((char , char , char *));
436	extern int ar_touch PARAMS ((char *));
437	extern time_t ar_member_date PARAMS ((char *));
438	#endif
439
440	extern int dir_file_exists_p PARAMS ((char , char ));
441	extern int file_exists_p PARAMS ((char *));
442	extern int file_impossible_p PARAMS ((char *));
443	extern void file_impossible PARAMS ((char *));
444	extern char dir_name PARAMS ((char ));
445	extern void hash_init_directories PARAMS ((void));
446
447	extern void define_default_variables PARAMS ((void));
448	extern void set_default_suffixes PARAMS ((void));
449	extern void install_default_suffix_rules PARAMS ((void));
450	extern void install_default_implicit_rules PARAMS ((void));
451
452	extern void build_vpath_lists PARAMS ((void));
453	extern void construct_vpath_list PARAMS ((char pattern, char dirpath));
454	extern int vpath_search PARAMS ((char *file, FILE_TIMESTAMP mtime_ptr));
455	extern int gpath_search PARAMS ((char *file, unsigned int len));
456
457	extern void construct_include_path PARAMS ((char **arg_dirs));
458
459	extern void user_access PARAMS ((void));
460	extern void make_access PARAMS ((void));
461	extern void child_access PARAMS ((void));
462
463	extern char *
464	strip_whitespace PARAMS ((const char begpp, const char endpp));
465
466
467	#ifdef HAVE_VFORK_H
468	# include <vfork.h>
469	#endif
470
471	/* We omit these declarations on non-POSIX systems which define _POSIX_VERSION,
472	because such systems often declare them in header files anyway. */
473
474	#if !defined (__GNU_LIBRARY__) && !defined (POSIX) && !defined (_POSIX_VERSION) && !defined(WINDOWS32)
475
476	extern long int atol ();
477	# ifndef VMS
478	extern long int lseek ();
479	# endif
480
481	#endif /* Not GNU C library or POSIX. */
482
483	#ifdef HAVE_GETCWD
484	# if !defined(VMS) && !defined(__DECC)
485	extern char *getcwd ();
486	#endif
487	#else
488	extern char *getwd ();
489	# define getcwd(buf, len) getwd (buf)
490	#endif
491
492	extern const struct floc *reading_file;
493
494	extern char **environ;
495
496	extern int just_print_flag, silent_flag, ignore_errors_flag, keep_going_flag;
497	extern int print_data_base_flag, question_flag, touch_flag, always_make_flag;
498	extern int env_overrides, no_builtin_rules_flag, no_builtin_variables_flag;
499	extern int print_version_flag, print_directory_flag, check_symlink_flag;
500	extern int warn_undefined_variables_flag, posix_pedantic, not_parallel;
501	extern int clock_skew_detected, rebuilding_makefiles;
502
503	/* can we run commands via 'sh -c xxx' or must we use batch files? */
504	extern int batch_mode_shell;
505
506	extern unsigned int job_slots;
507	extern int job_fds[2];
508	extern int job_rfd;
509	#ifndef NO_FLOAT
510	extern double max_load_average;
511	#else
512	extern int max_load_average;
513	#endif
514
515	extern char *program;
516	extern char *starting_directory;
517	extern unsigned int makelevel;
518	extern char version_string, remote_description, *make_host;
519
520	extern unsigned int commands_started;
521
522	extern int handling_fatal_signal;
523
524
525	#ifndef MIN
526	#define MIN(_a,_b) ((_a)<(_b)?(_a):(_b))
527	#endif
528	#ifndef MAX
529	#define MAX(_a,_b) ((_a)>(_b)?(_a):(_b))
530	#endif
531
532	#ifdef VMS
533	# define MAKE_SUCCESS 1
534	# define MAKE_TROUBLE 2
535	# define MAKE_FAILURE 3
536	#else
537	# define MAKE_SUCCESS 0
538	# define MAKE_TROUBLE 1
539	# define MAKE_FAILURE 2
540	#endif
541
542	/* Set up heap debugging library dmalloc. */
543
544	#ifdef HAVE_DMALLOC_H
545	#include <dmalloc.h>
546	#endif
547
548	#ifndef initialize_main
549	# ifdef __EMX__
550	# define initialize_main(pargc, pargv) \
551	{ _wildcard(pargc, pargv); _response(pargc, pargv); }
552	# else
553	# define initialize_main(pargc, pargv)
554	# endif
555	#endif
556
557
558	#ifdef __EMX__
559	# if !HAVE_STRCASECMP
560	# define strcasecmp stricmp
561	# endif
562
563	# if !defined chdir
564	# define chdir _chdir2
565	# endif
566	# if !defined getcwd
567	# define getcwd _getcwd2
568	# endif
569
570	/* NO_CHDIR2 causes make not to use _chdir2() and _getcwd2() instead of
571	chdir() and getcwd(). This avoids some error messages for the
572	make testsuite but restricts the drive letter support. */
573	# ifdef NO_CHDIR2
574	# warning NO_CHDIR2: usage of drive letters restricted
575	# undef chdir
576	# undef getcwd
577	# endif
578	#endif
579
580	#ifndef initialize_main
581	# define initialize_main(pargc, pargv)
582	#endif
583
584
585	/* Some systems (like Solaris, PTX, etc.) do not support the SA_RESTART flag
586	properly according to POSIX. So, we try to wrap common system calls with
587	checks for EINTR. Note that there are still plenty of system calls that
588	can fail with EINTR but this, reportedly, gets the vast majority of
589	failure cases. If you still experience failures you'll need to either get
590	a system where SA_RESTART works, or you need to avoid -j. */
591
592	#define EINTRLOOP(_v,_c) while (((_v)=_c)==-1 && errno==EINTR)
593
594	/* While system calls that return integers are pretty consistent about
595	returning -1 on failure and setting errno in that case, functions that
596	return pointers are not always so well behaved. Sometimes they return
597	NULL for expected behavior: one good example is readdir() which returns
598	NULL at the end of the directory--and _doesn't_ reset errno. So, we have
599	to do it ourselves here. */
600
601	#define ENULLLOOP(_v,_c) do{ errno = 0; \
602	while (((_v)=_c)==0 && errno==EINTR); }while(0)
603

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