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source: trunk/src/kmk/make.h@ 1919

Last change on this file since 1919 was 1918, checked in by bird, 17 years ago
kmk: New switch --print-stats which will print variable, file, strcache, allocation and heap statistics.
Property svn:eol-style set to `native`
File size: 24.9 KB

Line
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 Free Software
4	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 2, or (at your option) any later version.
10
11	GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
12	WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
13	A PARTICULAR PURPOSE. See the GNU General Public License for more details.
14
15	You should have received a copy of the GNU General Public License along with
16	GNU Make; see the file COPYING. If not, write to the Free Software
17	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */
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	/* AIX requires this to be the first thing in the file. */
27	#ifndef __GNUC__
28	# if HAVE_ALLOCA_H
29	# include <alloca.h>
30	# else
31	# ifdef _AIX
32	#pragma alloca
33	# else
34	# ifndef alloca /* predefined by HP cc +Olibcalls */
35	char *alloca ();
36	# endif
37	# endif
38	# endif
39	#endif
40
41
42	/* Specify we want GNU source code. This must be defined before any
43	system headers are included. */
44
45	#define _GNU_SOURCE 1
46
47
48	#ifdef CRAY
49	/* This must happen before #include <signal.h> so
50	that the declaration therein is changed. */
51	# define signal bsdsignal
52	#endif
53
54	/* If we're compiling for the dmalloc debugger, turn off string inlining. */
55	#if defined(HAVE_DMALLOC_H) && defined(__GNUC__)
56	# define __NO_STRING_INLINES
57	#endif
58
59	#include <sys/types.h>
60	#include <sys/stat.h>
61	#include <signal.h>
62	#include <stdio.h>
63	#include <ctype.h>
64	#ifdef HAVE_SYS_TIMEB_H
65	/* SCO 3.2 "devsys 4.2" has a prototype for `ftime' in <time.h> that bombs
66	unless <sys/timeb.h> has been included first. Does every system have a
67	<sys/timeb.h>? If any does not, configure should check for it. */
68	# include <sys/timeb.h>
69	#endif
70
71	#if TIME_WITH_SYS_TIME
72	# include <sys/time.h>
73	# include <time.h>
74	#else
75	# if HAVE_SYS_TIME_H
76	# include <sys/time.h>
77	# else
78	# include <time.h>
79	# endif
80	#endif
81
82	#include <errno.h>
83
84	#ifndef errno
85	extern int errno;
86	#endif
87
88	#ifndef isblank
89	# define isblank(c) ((c) == ' ' \|\| (c) == '\t')
90	#endif
91
92	#ifdef HAVE_UNISTD_H
93	# include <unistd.h>
94	/* Ultrix's unistd.h always defines _POSIX_VERSION, but you only get
95	POSIX.1 behavior with `cc -YPOSIX', which predefines POSIX itself! */
96	# if defined (_POSIX_VERSION) && !defined (ultrix) && !defined (VMS)
97	# define POSIX 1
98	# endif
99	#endif
100
101	/* Some systems define _POSIX_VERSION but are not really POSIX.1. */
102	#if (defined (butterfly) \|\| defined (__arm) \|\| (defined (__mips) && defined (_SYSTYPE_SVR3)) \|\| (defined (sequent) && defined (i386)))
103	# undef POSIX
104	#endif
105
106	#if !defined (POSIX) && defined (_AIX) && defined (_POSIX_SOURCE)
107	# define POSIX 1
108	#endif
109
110	#ifndef RETSIGTYPE
111	# define RETSIGTYPE void
112	#endif
113
114	#ifndef sigmask
115	# define sigmask(sig) (1 << ((sig) - 1))
116	#endif
117
118	#ifndef HAVE_SA_RESTART
119	# define SA_RESTART 0
120	#endif
121
122	#ifdef HAVE_LIMITS_H
123	# include <limits.h>
124	#endif
125	#ifdef HAVE_SYS_PARAM_H
126	# include <sys/param.h>
127	#endif
128
129	#ifndef PATH_MAX
130	# ifndef POSIX
131	# define PATH_MAX MAXPATHLEN
132	# endif
133	#endif
134	#ifndef MAXPATHLEN
135	# define MAXPATHLEN 1024
136	#endif
137
138	#ifdef PATH_MAX
139	# define GET_PATH_MAX PATH_MAX
140	# define PATH_VAR(var) char var[PATH_MAX]
141	#else
142	# define NEED_GET_PATH_MAX 1
143	# define GET_PATH_MAX (get_path_max ())
144	# define PATH_VAR(var) char *var = alloca (GET_PATH_MAX)
145	unsigned int get_path_max (void);
146	#endif
147
148	#if defined(KMK) \|\| defined(CONFIG_WITH_VALUE_LENGTH)
149	# ifdef _MSC_VER
150	# define MY_INLINE _inline static
151	# define MY_DBGBREAK __debugbreak()
152	# elif defined(__GNUC__)
153	# define MY_INLINE static __inline__
154	# if defined(__i386__) \|\| defined(__x86_64__)
155	# define MY_DBGBREAK __asm__ __volatile__ ("int3")
156	#else
157	# define MY_DBGBREAK assert(0)
158	# endif
159	# else
160	# define MY_INLINE static
161	# define MY_DBGBREAK assert(0)
162	# endif
163	# ifndef NDEBUG
164	# define MY_ASSERT_MSG(expr, printfargs) \
165	do { if (!(expr)) { printf printfargs; MY_DBGBREAK; } } while (0)
166	# else
167	# define MY_ASSERT_MSG(expr, printfargs) do { } while (0)
168	# endif
169
170	# ifdef __GNUC__
171	# define MY_PREDICT_TRUE(expr) __builtin_expect(!!(expr), 1)
172	# define MY_PREDICT_FALSE(expr) __builtin_expect(!!(expr), 0)
173	# else
174	# define MY_PREDICT_TRUE(expr) (expr)
175	# define MY_PREDICT_FALSE(expr) (expr)
176	# endif
177	#endif
178
179	#ifdef KMK
180	# include <ctype.h>
181	# if 1 /* See if this speeds things up (Windows is doing this anyway, so,
182	we might as well try be consistent in speed + features). */
183	# if 1
184	# define MY_IS_BLANK(ch) ((ch) == ' ' \|\| (ch) == '\t')
185	# define MY_IS_BLANK_OR_EOS(ch) ((ch) == ' ' \|\| (ch) == '\t' \|\| (ch) == '\0')
186	# else
187	# define MY_IS_BLANK(ch) (((ch) == ' ') \| ((ch) == '\t'))
188	# define MY_IS_BLANK_OR_EOS(ch) (((ch) == ' ') \| ((ch) == '\t') \| ((ch) == '\0'))
189	# endif
190	# undef isblank
191	# define isblank(ch) MY_IS_BLANK(ch)
192	# else
193	# define MY_IS_BLANK(ch) isblank ((unsigned char)(ch))
194	# define MY_IS_BLANK_OR_EOS(ch) (isblank ((unsigned char)(ch)) \|\| (ch) == '\0')
195	# endif
196	#endif
197
198	#ifndef CHAR_BIT
199	# define CHAR_BIT 8
200	#endif
201
202	/* Nonzero if the integer type T is signed. */
203	#define INTEGER_TYPE_SIGNED(t) ((t) -1 < 0)
204
205	/* The minimum and maximum values for the integer type T.
206	Use ~ (t) 0, not -1, for portability to 1's complement hosts. */
207	#define INTEGER_TYPE_MINIMUM(t) \
208	(! INTEGER_TYPE_SIGNED (t) ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))
209	#define INTEGER_TYPE_MAXIMUM(t) (~ (t) 0 - INTEGER_TYPE_MINIMUM (t))
210
211	#ifndef CHAR_MAX
212	# define CHAR_MAX INTEGER_TYPE_MAXIMUM (char)
213	#endif
214
215	#ifdef STAT_MACROS_BROKEN
216	# ifdef S_ISREG
217	# undef S_ISREG
218	# endif
219	# ifdef S_ISDIR
220	# undef S_ISDIR
221	# endif
222	#endif /* STAT_MACROS_BROKEN. */
223
224	#ifndef S_ISREG
225	# define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
226	#endif
227	#ifndef S_ISDIR
228	# define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
229	#endif
230
231	#ifdef VMS
232	# include <types.h>
233	# include <unixlib.h>
234	# include <unixio.h>
235	# include <perror.h>
236	/* Needed to use alloca on VMS. */
237	# include <builtins.h>
238	#endif
239
240	#ifndef __attribute__
241	/* This feature is available in gcc versions 2.5 and later. */
242	# if __GNUC__ < 2 \|\| (__GNUC__ == 2 && __GNUC_MINOR__ < 5) \|\| __STRICT_ANSI__
243	# define __attribute__(x)
244	# endif
245	/* The __-protected variants of `format' and `printf' attributes
246	are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
247	# if __GNUC__ < 2 \|\| (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
248	# define __format__ format
249	# define __printf__ printf
250	# endif
251	#endif
252	#define UNUSED __attribute__ ((unused))
253
254	#if defined (STDC_HEADERS) \|\| defined (__GNU_LIBRARY__)
255	# include <stdlib.h>
256	# include <string.h>
257	# define ANSI_STRING 1
258	#else /* No standard headers. */
259	# ifdef HAVE_STRING_H
260	# include <string.h>
261	# define ANSI_STRING 1
262	# else
263	# include <strings.h>
264	# endif
265	# ifdef HAVE_MEMORY_H
266	# include <memory.h>
267	# endif
268	# ifdef HAVE_STDLIB_H
269	# include <stdlib.h>
270	# else
271	void *malloc (int);
272	void realloc (void , int);
273	void free (void *);
274
275	void abort (void) __attribute__ ((noreturn));
276	void exit (int) __attribute__ ((noreturn));
277	# endif /* HAVE_STDLIB_H. */
278
279	#endif /* Standard headers. */
280
281	/* These should be in stdlib.h. Make sure we have them. */
282	#ifndef EXIT_SUCCESS
283	# define EXIT_SUCCESS 0
284	#endif
285	#ifndef EXIT_FAILURE
286	# define EXIT_FAILURE 1
287	#endif
288
289	#ifndef ANSI_STRING
290
291	/* SCO Xenix has a buggy macro definition in <string.h>. */
292	#undef strerror
293	#if !defined(__DECC)
294	char *strerror (int errnum);
295	#endif
296
297	#endif /* !ANSI_STRING. */
298	#undef ANSI_STRING
299
300	#if HAVE_INTTYPES_H
301	# include <inttypes.h>
302	#endif
303	#define FILE_TIMESTAMP uintmax_t
304
305	#if !defined(HAVE_STRSIGNAL)
306	char *strsignal (int signum);
307	#endif
308
309	/* ISDIGIT offers the following features:
310	- Its arg may be any int or unsigned int; it need not be an unsigned char.
311	- It's guaranteed to evaluate its argument exactly once.
312	NOTE! Make relies on this behavior, don't change it!
313	- It's typically faster.
314	POSIX 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
315	only '0' through '9' are digits. Prefer ISDIGIT to isdigit() unless
316	it's important to use the locale's definition of `digit' even when the
317	host does not conform to POSIX. */
318	#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
319
320	#ifndef iAPX286
321	# define streq(a, b) \
322	((a) == (b) \|\| \
323	((a) == (b) && (*(a) == '\0' \|\| !strcmp ((a) + 1, (b) + 1))))
324	# ifdef HAVE_CASE_INSENSITIVE_FS
325	# define strieq(a, b) \
326	((a) == (b) \
327	\|\| (tolower((unsigned char)(a)) == tolower((unsigned char)(b)) \
328	&& (*(a) == '\0' \|\| !strcasecmp ((a) + 1, (b) + 1))))
329	# else
330	# define strieq(a, b) streq(a, b)
331	# endif
332	#else
333	/* Buggy compiler can't handle this. */
334	# define streq(a, b) (strcmp ((a), (b)) == 0)
335	# define strieq(a, b) (strcmp ((a), (b)) == 0)
336	#endif
337	#define strneq(a, b, l) (strncmp ((a), (b), (l)) == 0)
338
339	#if (defined(__GNUC__) \|\| defined(ENUM_BITFIELDS)) && !defined(NO_ENUM_BITFIELDS)
340	# define ENUM_BITFIELD(bits) :bits
341	#else
342	# define ENUM_BITFIELD(bits)
343	#endif
344
345	/* Handle gettext and locales. */
346
347	#if HAVE_LOCALE_H
348	# include <locale.h>
349	#else
350	# define setlocale(category, locale)
351	#endif
352
353	#include <gettext.h>
354
355	#define _(msgid) gettext (msgid)
356	#define N_(msgid) gettext_noop (msgid)
357	#define S_(msg1,msg2,num) ngettext (msg1,msg2,num)
358
359	/* Handle other OSs. */
360	#ifndef PATH_SEPARATOR_CHAR
361	# if defined(HAVE_DOS_PATHS)
362	# define PATH_SEPARATOR_CHAR ';'
363	# elif defined(VMS)
364	# define PATH_SEPARATOR_CHAR ','
365	# else
366	# define PATH_SEPARATOR_CHAR ':'
367	# endif
368	#endif
369
370	/* This is needed for getcwd() and chdir(), on some W32 systems. */
371	#if defined(HAVE_DIRECT_H)
372	# include <direct.h>
373	#endif
374
375	#ifdef WINDOWS32
376	# include <fcntl.h>
377	# include <malloc.h>
378	# define pipe(_p) _pipe((_p), 512, O_BINARY)
379	# define kill(_pid,_sig) w32_kill((_pid),(_sig))
380
381	void sync_Path_environment (void);
382	int w32_kill (int pid, int sig); /* bird kill -> w32_kill - macro acquired () on the args. */
383	char end_of_token_w32 (const char s, char stopchar);
384	int find_and_set_default_shell (const char *token);
385
386	/* indicates whether or not we have Bourne shell */
387	extern int no_default_sh_exe;
388
389	/* is default_shell unixy? */
390	extern int unixy_shell;
391	#endif /* WINDOWS32 */
392
393	struct floc
394	{
395	const char *filenm;
396	unsigned long lineno;
397	};
398	#define NILF ((struct floc *)0)
399
400	#define STRING_SIZE_TUPLE(_s) (_s), (sizeof (_s)-1)
401
402
403
404	/* We have to have stdarg.h or varargs.h AND v*printf or doprnt to use
405	variadic versions of these functions. */
406
407	#if HAVE_STDARG_H \|\| HAVE_VARARGS_H
408	# if HAVE_VPRINTF \|\| HAVE_DOPRNT
409	# define USE_VARIADIC 1
410	# endif
411	#endif
412
413	#if HAVE_ANSI_COMPILER && USE_VARIADIC && HAVE_STDARG_H
414	void message (int prefix, const char *fmt, ...)
415	__attribute__ ((__format__ (__printf__, 2, 3)));
416	void error (const struct floc flocp, const char fmt, ...)
417	__attribute__ ((__format__ (__printf__, 2, 3)));
418	void fatal (const struct floc flocp, const char fmt, ...)
419	__attribute__ ((noreturn, __format__ (__printf__, 2, 3)));
420	#else
421	void message ();
422	void error ();
423	void fatal ();
424	#endif
425
426	void die (int) __attribute__ ((noreturn));
427	void log_working_directory (int);
428	void pfatal_with_name (const char *) __attribute__ ((noreturn));
429	void perror_with_name (const char , const char );
430	char savestring (const char , unsigned int);
431	char concat (const char , const char , const char );
432	void *xmalloc (unsigned int);
433	void xrealloc (void , unsigned int);
434	char xstrdup (const char );
435	#ifdef CONFIG_WITH_PRINT_STATS_SWITCH
436	void print_heap_stats (void);
437	#endif
438	char find_next_token (const char , unsigned int );
439	char next_token (const char );
440	char end_of_token (const char );
441	#ifndef CONFIG_WITH_VALUE_LENGTH
442	void collapse_continuations (char *);
443	#else
444	char collapse_continuations (char , unsigned int);
445	#endif
446	#ifdef CONFIG_WITH_OPTIMIZATION_HACKS /* memchr is usually compiler intrinsic, thus faster. */
447	# define lindex(s, limit, c) ((char *)memchr((s), (c), (limit) - (s)))
448	#else
449	char lindex (const char , const char *, int);
450	#endif
451	int alpha_compare (const void , const void );
452	void print_spaces (unsigned int);
453	char find_percent (char );
454	const char find_percent_cached (const char *);
455	FILE open_tmpfile (char , const char );
456
457	#ifndef NO_ARCHIVES
458	int ar_name (const char *);
459	void ar_parse_name (const char , char , char *);
460	int ar_touch (const char *);
461	time_t ar_member_date (const char *);
462
463	typedef long int (ar_member_func_t) (int desc, const char mem, int truncated,
464	long int hdrpos, long int datapos,
465	long int size, long int date, int uid,
466	int gid, int mode, const void *arg);
467
468	long int ar_scan (const char archive, ar_member_func_t function, const void arg);
469	int ar_name_equal (const char name, const char mem, int truncated);
470	#ifndef VMS
471	int ar_member_touch (const char arname, const char memname);
472	#endif
473	#endif
474
475	int dir_file_exists_p (const char , const char );
476	int file_exists_p (const char *);
477	int file_impossible_p (const char *);
478	void file_impossible (const char *);
479	const char dir_name (const char );
480	void hash_init_directories (void);
481
482	void define_default_variables (void);
483	void set_default_suffixes (void);
484	void install_default_suffix_rules (void);
485	void install_default_implicit_rules (void);
486
487	void build_vpath_lists (void);
488	void construct_vpath_list (char pattern, char dirpath);
489	const char vpath_search (const char file, FILE_TIMESTAMP *mtime_ptr);
490	int gpath_search (const char *file, unsigned int len);
491
492	void construct_include_path (const char **arg_dirs);
493
494	void user_access (void);
495	void make_access (void);
496	void child_access (void);
497
498	void close_stdout (void);
499
500	char strip_whitespace (const char begpp, const char *endpp);
501
502	#ifdef CONFIG_WITH_ALLOC_CACHES
503	/* alloccache (misc.c) */
504
505	struct alloccache_free_ent
506	{
507	struct alloccache_free_ent *next;
508	};
509
510	struct alloccache
511	{
512	char *free_start;
513	char *free_end;
514	struct alloccache_free_ent *free_head;
515	unsigned int size;
516	unsigned int alloc_count;
517	unsigned int total_count;
518	const char *name;
519	struct alloccache *next;
520	void *grow_arg;
521	void (grow_alloc)(void *grow_arg, unsigned int size);
522	};
523
524	void alloccache_init (struct alloccache cache, unsigned int size, const char name,
525	void (grow_alloc)(void grow_arg, unsigned int size), void grow_arg);
526	void alloccache_term (struct alloccache *cache,
527	void (term_free)(void term_arg, void ptr, unsigned int size), void term_arg);
528	void alloccache_join (struct alloccache cache, struct alloccache eat);
529	void alloccache_print (struct alloccache *cache);
530	void alloccache_print_all (void);
531	struct alloccache_free_ent alloccache_alloc_grow (struct alloccache cache);
532
533	/* Allocate an item. */
534	MY_INLINE void *
535	alloccache_alloc (struct alloccache *cache)
536	{
537	struct alloccache_free_ent *f = cache->free_head;
538	if (f)
539	cache->free_head = f->next;
540	else if (cache->free_start != cache->free_end)
541	{
542	f = (struct alloccache_free_ent *)cache->free_start;
543	cache->free_start += cache->size;
544	}
545	else
546	f = alloccache_alloc_grow (cache);
547	cache->alloc_count++;
548	return f;
549	}
550
551	/* Allocate a cleared item. */
552	MY_INLINE void *
553	alloccache_calloc (struct alloccache *cache)
554	{
555	void *item = alloccache_alloc (cache);
556	memset (item, '\0', cache->size);
557	return item;
558	}
559
560	/* Free an item. */
561	MY_INLINE void
562	alloccache_free (struct alloccache cache, void item)
563	{
564	struct alloccache_free_ent f = (struct alloccache_free_ent )item;
565	#if 0 /ndef NDEBUG/
566	struct alloccache_free_ent *c;
567	unsigned int i = 0;
568	for (c = cache->free_head; c != NULL; c = c->next, i++)
569	MY_ASSERT_MSG (c != f && i < 0x10000000,
570	("i=%u total_count=%u\n", i, cache->total_count));
571	#endif
572
573	f->next = cache->free_head;
574	cache->free_head = f;
575	cache->alloc_count--;
576	}
577
578	/* the alloc caches */
579	extern struct alloccache dep_cache;
580	extern struct alloccache file_cache;
581	extern struct alloccache commands_cache;
582	extern struct alloccache nameseq_cache;
583	extern struct alloccache variable_cache;
584	extern struct alloccache variable_set_cache;
585	extern struct alloccache variable_set_list_cache;
586
587	#endif /* CONFIG_WITH_ALLOC_CACHES */
588
589
590	/* String caching */
591	void strcache_init (void);
592	void strcache_print_stats (const char *prefix);
593	#ifndef CONFIG_WITH_STRCACHE2
594	int strcache_iscached (const char *str);
595	const char strcache_add (const char str);
596	const char strcache_add_len (const char str, int len);
597	int strcache_setbufsize (int size);
598	#else /* CONFIG_WITH_STRCACHE2 */
599
600	# include "strcache2.h"
601	extern struct strcache2 file_strcache;
602
603	# define strcache_iscached(str) strcache2_is_cached(&file_strcache, str)
604	# define strcache_add(str) strcache2_add_file(&file_strcache, str, strlen (str))
605	# define strcache_add_len(str, len) strcache2_add_file(&file_strcache, str, len)
606	# define strcache_get_len(str) strcache2_get_len(&file_strcache, str) /* FIXME: replace this and related checks ... */
607
608	#endif /* CONFIG_WITH_STRCACHE2 */
609
610	#ifdef HAVE_VFORK_H
611	# include <vfork.h>
612	#endif
613
614	/* We omit these declarations on non-POSIX systems which define _POSIX_VERSION,
615	because such systems often declare them in header files anyway. */
616
617	#if !defined (__GNU_LIBRARY__) && !defined (POSIX) && !defined (_POSIX_VERSION) && !defined(WINDOWS32)
618
619	long int atol ();
620	# ifndef VMS
621	long int lseek ();
622	# endif
623
624	#endif /* Not GNU C library or POSIX. */
625
626	#ifdef HAVE_GETCWD
627	# if !defined(VMS) && !defined(__DECC) && !defined(_MSC_VER) /* bird: MSC */
628	char *getcwd ();
629	# endif
630	#else
631	char *getwd ();
632	# define getcwd(buf, len) getwd (buf)
633	#endif
634
635	#if !HAVE_STRCASECMP
636	# if HAVE_STRICMP
637	# define strcasecmp stricmp
638	# elif HAVE_STRCMPI
639	# define strcasecmp strcmpi
640	# else
641	/* Create our own, in misc.c */
642	int strcasecmp (const char s1, const char s2);
643	# endif
644	#endif
645
646	extern const struct floc *reading_file;
647	extern const struct floc **expanding_var;
648
649	#if !defined(_MSC_VER) /* bird */
650	extern char **environ;
651	#endif
652
653	extern int just_print_flag, silent_flag, ignore_errors_flag, keep_going_flag;
654	extern int print_data_base_flag, question_flag, touch_flag, always_make_flag;
655	extern int env_overrides, no_builtin_rules_flag, no_builtin_variables_flag;
656	extern int print_version_flag, print_directory_flag, check_symlink_flag;
657	extern int warn_undefined_variables_flag, posix_pedantic, not_parallel;
658	extern int second_expansion, clock_skew_detected, rebuilding_makefiles;
659	#ifdef CONFIG_WITH_2ND_TARGET_EXPANSION
660	extern int second_target_expansion;
661	#endif
662	#ifdef CONFIG_PRETTY_COMMAND_PRINTING
663	extern int pretty_command_printing;
664	#endif
665	#if defined (CONFIG_WITH_MAKE_STATS) \|\| defined (CONFIG_WITH_MINIMAL_STATS)
666	extern int make_expensive_statistics;
667	#endif
668
669
670	/* can we run commands via 'sh -c xxx' or must we use batch files? */
671	extern int batch_mode_shell;
672
673	extern char cmd_prefix;
674
675	extern unsigned int job_slots;
676	extern int job_fds[2];
677	extern int job_rfd;
678	#ifndef NO_FLOAT
679	extern double max_load_average;
680	#else
681	extern int max_load_average;
682	#endif
683
684	extern char *program;
685	extern char *starting_directory;
686	extern unsigned int makelevel;
687	extern char version_string, remote_description, *make_host;
688
689	extern unsigned int commands_started;
690
691	extern int handling_fatal_signal;
692
693
694	#ifndef MIN
695	#define MIN(_a,_b) ((_a)<(_b)?(_a):(_b))
696	#endif
697	#ifndef MAX
698	#define MAX(_a,_b) ((_a)>(_b)?(_a):(_b))
699	#endif
700
701	#ifdef VMS
702	# define MAKE_SUCCESS 1
703	# define MAKE_TROUBLE 2
704	# define MAKE_FAILURE 3
705	#else
706	# define MAKE_SUCCESS 0
707	# define MAKE_TROUBLE 1
708	# define MAKE_FAILURE 2
709	#endif
710
711	/* Set up heap debugging library dmalloc. */
712
713	#ifdef HAVE_DMALLOC_H
714	#include <dmalloc.h>
715	#endif
716
717	#ifndef initialize_main
718	# ifdef __EMX__
719	# define initialize_main(pargc, pargv) \
720	{ _wildcard(pargc, pargv); _response(pargc, pargv); }
721	# else
722	# define initialize_main(pargc, pargv)
723	# endif
724	#endif
725
726	#ifdef __EMX__
727	# if !defined chdir
728	# define chdir _chdir2
729	# endif
730	# if !defined getcwd
731	# define getcwd _getcwd2
732	# endif
733
734	/* NO_CHDIR2 causes make not to use _chdir2() and _getcwd2() instead of
735	chdir() and getcwd(). This avoids some error messages for the
736	make testsuite but restricts the drive letter support. */
737	# ifdef NO_CHDIR2
738	# warning NO_CHDIR2: usage of drive letters restricted
739	# undef chdir
740	# undef getcwd
741	# endif
742	#endif
743
744	#ifndef initialize_main
745	# define initialize_main(pargc, pargv)
746	#endif
747
748
749	/* Some systems (like Solaris, PTX, etc.) do not support the SA_RESTART flag
750	properly according to POSIX. So, we try to wrap common system calls with
751	checks for EINTR. Note that there are still plenty of system calls that
752	can fail with EINTR but this, reportedly, gets the vast majority of
753	failure cases. If you still experience failures you'll need to either get
754	a system where SA_RESTART works, or you need to avoid -j. */
755
756	#define EINTRLOOP(_v,_c) while (((_v)=_c)==-1 && errno==EINTR)
757
758	/* While system calls that return integers are pretty consistent about
759	returning -1 on failure and setting errno in that case, functions that
760	return pointers are not always so well behaved. Sometimes they return
761	NULL for expected behavior: one good example is readdir() which returns
762	NULL at the end of the directory--and _doesn't_ reset errno. So, we have
763	to do it ourselves here. */
764
765	#define ENULLLOOP(_v,_c) do { errno = 0; (_v) = _c; } \
766	while((_v)==0 && errno==EINTR)
767
768
769	#if defined(__EMX__) && defined(CONFIG_WITH_OPTIMIZATION_HACKS) /* bird: saves 40-100ms on libc. */
770	static inline void __my_rawmemchr (const void __s, int __c);
771	#undef strchr
772	#define strchr(s, c) \
773	(__extension__ (__builtin_constant_p (c) \
774	? ((c) == '\0' \
775	? (char *) __my_rawmemchr ((s), (c)) \
776	: __my_strchr_c ((s), ((c) & 0xff) << 8)) \
777	: __my_strchr_g ((s), (c))))
778	static inline char __my_strchr_c (const char __s, int __c)
779	{
780	register unsigned long int __d0;
781	register char *__res;
782	__asm__ __volatile__
783	("1:\n\t"
784	"movb (%0),%%al\n\t"
785	"cmpb %%ah,%%al\n\t"
786	"je 2f\n\t"
787	"leal 1(%0),%0\n\t"
788	"testb %%al,%%al\n\t"
789	"jne 1b\n\t"
790	"xorl %0,%0\n"
791	"2:"
792	: "=r" (__res), "=&a" (__d0)
793	: "0" (__s), "1" (__c),
794	"m" ( (struct { char __x[0xfffffff]; } )__s)
795	: "cc");
796	return __res;
797	}
798
799	static inline char __my_strchr_g (__const char __s, int __c)
800	{
801	register unsigned long int __d0;
802	register char *__res;
803	__asm__ __volatile__
804	("movb %%al,%%ah\n"
805	"1:\n\t"
806	"movb (%0),%%al\n\t"
807	"cmpb %%ah,%%al\n\t"
808	"je 2f\n\t"
809	"leal 1(%0),%0\n\t"
810	"testb %%al,%%al\n\t"
811	"jne 1b\n\t"
812	"xorl %0,%0\n"
813	"2:"
814	: "=r" (__res), "=&a" (__d0)
815	: "0" (__s), "1" (__c),
816	"m" ( (struct { char __x[0xfffffff]; } )__s)
817	: "cc");
818	return __res;
819	}
820
821	static inline void __my_rawmemchr (const void __s, int __c)
822	{
823	register unsigned long int __d0;
824	register unsigned char *__res;
825	__asm__ __volatile__
826	("cld\n\t"
827	"repne; scasb\n\t"
828	: "=D" (__res), "=&c" (__d0)
829	: "a" (__c), "0" (__s), "1" (0xffffffff),
830	"m" ( (struct { char __x[0xfffffff]; } )__s)
831	: "cc");
832	return __res - 1;
833	}
834
835	#undef memchr
836	#define memchr(a,b,c) __my_memchr((a),(b),(c))
837	static inline void __my_memchr (__const void __s, int __c, size_t __n)
838	{
839	register unsigned long int __d0;
840	register unsigned char *__res;
841	if (__n == 0)
842	return NULL;
843	__asm__ __volatile__
844	("repne; scasb\n\t"
845	"je 1f\n\t"
846	"movl $1,%0\n"
847	"1:"
848	: "=D" (__res), "=&c" (__d0)
849	: "a" (__c), "0" (__s), "1" (__n),
850	"m" ( (struct { __extension__ char __x[__n]; } )__s)
851	: "cc");
852	return __res - 1;
853	}
854
855	#endif /* __EMX__ (bird) */
856
857	#ifdef CONFIG_WITH_MAKE_STATS
858	extern long make_stats_allocations;
859	extern unsigned long make_stats_allocated;
860	extern unsigned long make_stats_allocated_sum;
861	extern unsigned long make_stats_ht_lookups;
862	extern unsigned long make_stats_ht_collisions;
863
864	# ifdef __APPLE__
865	# include <malloc/malloc.h>
866	# define SIZE_OF_HEAP_BLOCK(ptr) malloc_size(ptr)
867
868	# elif defined(__linux__) /* glibc */
869	# include <malloc.h>
870	# define SIZE_OF_HEAP_BLOCK(ptr) malloc_usable_size(ptr)
871
872	# elif defined(_MSC_VER) \|\| defined(__OS2__)
873	# define SIZE_OF_HEAP_BLOCK(ptr) _msize(ptr)
874
875	# else
876	# include <stdlib.h>
877	# define SIZE_OF_HEAP_BLOCK(ptr) 0
878	#endif
879
880	# if defined(CONFIG_WITH_MAKE_STATS) && !defined(ELECTRIC_HEAP)
881	# define free xfree
882	extern void xfree (void *);
883	# endif
884
885	# define MAKE_STATS_3(expr) do { expr; } while (0)
886	# define MAKE_STATS_2(expr) do { expr; } while (0)
887	# define MAKE_STATS(expr) do { expr; } while (0)
888	#else
889	# define MAKE_STATS_3(expr) do { } while (0)
890	# define MAKE_STATS_2(expr) do { } while (0)
891	# define MAKE_STATS(expr) do { } while (0)
892	#endif
893
894	#ifdef CONFIG_WITH_IF_CONDITIONALS
895	extern int expr_eval_if_conditionals(char line, const struct floc flocp);
896	extern char expr_eval_to_string(char o, char *expr);
897	#endif
898
899	#ifdef KMK
900	extern char abspath(const char name, char *apath);
901	extern char func_breakpoint(char o, char *argv, const char funcname);
902	#endif

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