source: trunk/src/kmk/variable.c@ 1121

Last change on this file since 1121 was 1121, checked in by bird, 18 years ago

Added $(date ) and $(date-utc ) function as simple wrappers around strftime.
  • Property svn:eol-style set to native
File size: 61.0 KB
Line 
1/* Internals of variables for GNU Make.
2Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
31998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
4Foundation, Inc.
5This file is part of GNU Make.
6
7GNU Make is free software; you can redistribute it and/or modify it under the
8terms of the GNU General Public License as published by the Free Software
9Foundation; either version 2, or (at your option) any later version.
10
11GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
13A PARTICULAR PURPOSE. See the GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License along with
16GNU Make; see the file COPYING. If not, write to the Free Software
17Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */
18
19#include "make.h"
20
21#include <assert.h>
22
23#include "dep.h"
24#include "filedef.h"
25#include "job.h"
26#include "commands.h"
27#include "variable.h"
28#include "rule.h"
29#ifdef WINDOWS32
30#include "pathstuff.h"
31#endif
32#include "hash.h"
33#ifdef KMK
34# include "kbuild.h"
35#endif
36
37/* Chain of all pattern-specific variables. */
38
39static struct pattern_var *pattern_vars;
40
41/* Pointer to last struct in the chain, so we can add onto the end. */
42
43static struct pattern_var *last_pattern_var;
44
45/* Create a new pattern-specific variable struct. */
46
47struct pattern_var *
48create_pattern_var (const char *target, const char *suffix)
49{
50 register struct pattern_var *p = xmalloc (sizeof (struct pattern_var));
51
52 if (last_pattern_var != 0)
53 last_pattern_var->next = p;
54 else
55 pattern_vars = p;
56 last_pattern_var = p;
57 p->next = 0;
58
59 p->target = target;
60 p->len = strlen (target);
61 p->suffix = suffix + 1;
62
63 return p;
64}
65
66/* Look up a target in the pattern-specific variable list. */
67
68static struct pattern_var *
69lookup_pattern_var (struct pattern_var *start, const char *target)
70{
71 struct pattern_var *p;
72 unsigned int targlen = strlen(target);
73
74 for (p = start ? start->next : pattern_vars; p != 0; p = p->next)
75 {
76 const char *stem;
77 unsigned int stemlen;
78
79 if (p->len > targlen)
80 /* It can't possibly match. */
81 continue;
82
83 /* From the lengths of the filename and the pattern parts,
84 find the stem: the part of the filename that matches the %. */
85 stem = target + (p->suffix - p->target - 1);
86 stemlen = targlen - p->len + 1;
87
88 /* Compare the text in the pattern before the stem, if any. */
89 if (stem > target && !strneq (p->target, target, stem - target))
90 continue;
91
92 /* Compare the text in the pattern after the stem, if any.
93 We could test simply using streq, but this way we compare the
94 first two characters immediately. This saves time in the very
95 common case where the first character matches because it is a
96 period. */
97 if (*p->suffix == stem[stemlen]
98 && (*p->suffix == '\0' || streq (&p->suffix[1], &stem[stemlen+1])))
99 break;
100 }
101
102 return p;
103}
104
105
106/* Hash table of all global variable definitions. */
107
108#ifdef VARIABLE_HASH
109# ifdef _MSC_VER
110# define inline _inline
111typedef signed int int32_t;
112typedef signed short int int16_t;
113# endif
114static inline unsigned long variable_hash_2i(register const unsigned char *var, register int length)
115{
116 register unsigned int hash = 0;
117 var += length;
118 switch (length)
119 {
120 default:
121 case 16: hash = *--var + (hash << 6) + (hash << 16) - hash;
122 case 15: hash = *--var + (hash << 6) + (hash << 16) - hash;
123 case 14: hash = *--var + (hash << 6) + (hash << 16) - hash;
124 case 13: hash = *--var + (hash << 6) + (hash << 16) - hash;
125 case 12: hash = *--var + (hash << 6) + (hash << 16) - hash;
126 case 11: hash = *--var + (hash << 6) + (hash << 16) - hash;
127 case 10: hash = *--var + (hash << 6) + (hash << 16) - hash;
128 case 9: hash = *--var + (hash << 6) + (hash << 16) - hash;
129 case 8: hash = *--var + (hash << 6) + (hash << 16) - hash;
130 case 7: hash = *--var + (hash << 6) + (hash << 16) - hash;
131 case 6: hash = *--var + (hash << 6) + (hash << 16) - hash;
132 case 5: hash = *--var + (hash << 6) + (hash << 16) - hash;
133 case 4: hash = *--var + (hash << 6) + (hash << 16) - hash;
134 case 3: hash = *--var + (hash << 6) + (hash << 16) - hash;
135 case 2: hash = *--var + (hash << 6) + (hash << 16) - hash;
136 case 1: hash = *--var + (hash << 6) + (hash << 16) - hash;
137 case 0:
138 break;
139 }
140 return hash;
141}
142
143static inline unsigned long variable_hash_1i(register const unsigned char *var, register int length)
144{
145 register unsigned int hash = ((5381 << 5) + 5381) + *var;
146 switch (length)
147 {
148 default:
149 case 8: hash = ((hash << 5) + hash) + var[7];
150 case 7: hash = ((hash << 5) + hash) + var[6];
151 case 6: hash = ((hash << 5) + hash) + var[5];
152 case 5: hash = ((hash << 5) + hash) + var[4];
153 case 4: hash = ((hash << 5) + hash) + var[3];
154 case 3: hash = ((hash << 5) + hash) + var[2];
155 case 2: hash = ((hash << 5) + hash) + var[1];
156 case 1: return hash;
157 case 0: return 5381; /* shouldn't happen */
158 }
159}
160#endif /* CONFIG_WITH_OPTIMIZATION_HACKS */
161
162static unsigned long
163variable_hash_1 (const void *keyv)
164{
165 struct variable const *key = (struct variable const *) keyv;
166#ifdef VARIABLE_HASH /* bird */
167# ifdef VARIABLE_HASH_STRICT
168 if (key->hash1 != variable_hash_1i (key->name, key->length))
169 __asm__("int3");
170 if (key->hash2 && key->hash2 != variable_hash_2i (key->name, key->length))
171 __asm__("int3");
172# endif
173 return key->hash1;
174#else
175# ifdef CONFIG_WITH_OPTIMIZATION_HACKS
176 return variable_hash_1i (key->name, key->length);
177# else
178 return_STRING_N_HASH_1 (key->name, key->length);
179# endif
180#endif
181}
182
183static unsigned long
184variable_hash_2 (const void *keyv)
185{
186#ifdef VARIABLE_HASH /* bird */
187 struct variable *key = (struct variable *) keyv;
188 if (!key->hash2)
189 key->hash2 = variable_hash_2i (key->name, key->length);
190 return key->hash2;
191#else
192 struct variable const *key = (struct variable const *) keyv;
193# ifdef CONFIG_WITH_OPTIMIZATION_HACKS
194 return variable_hash_2i (key->name, key->length);
195# else
196 return_STRING_N_HASH_2 (key->name, key->length);
197# endif
198#endif
199}
200
201static int
202variable_hash_cmp (const void *xv, const void *yv)
203{
204 struct variable const *x = (struct variable const *) xv;
205 struct variable const *y = (struct variable const *) yv;
206 int result = x->length - y->length;
207 if (result)
208 return result;
209#ifdef VARIABLE_HASH_STRICT /* bird */
210 if (x->hash1 != variable_hash_1i (x->name, x->length))
211 __asm__("int3");
212 if (x->hash2 && x->hash2 != variable_hash_2i (x->name, x->length))
213 __asm__("int3");
214 if (y->hash1 != variable_hash_1i (y->name, y->length))
215 __asm__("int3");
216 if (y->hash2 && y->hash2 != variable_hash_2i (y->name, y->length))
217 __asm__("int3");
218#endif
219#ifdef VARIABLE_HASH
220 /* hash 1 */
221 result = x->hash1 - y->hash1;
222 if (result)
223 return result;
224#endif
225#ifdef CONFIG_WITH_OPTIMIZATION_HACKS /* bird: speed */
226 {
227 const char *xs = x->name;
228 const char *ys = y->name;
229 switch (x->length)
230 {
231 case 8:
232 result = *(int32_t*)(xs + 4) - *(int32_t*)(ys + 4);
233 if (result)
234 return result;
235 return *(int32_t*)xs - *(int32_t*)ys;
236 case 7:
237 result = xs[6] - ys[6];
238 if (result)
239 return result;
240 case 6:
241 result = *(int32_t*)xs - *(int32_t*)ys;
242 if (result)
243 return result;
244 return *(int16_t*)(xs + 4) - *(int16_t*)(ys + 4);
245 case 5:
246 result = xs[4] - ys[4];
247 if (result)
248 return result;
249 case 4:
250 return *(int32_t*)xs - *(int32_t*)ys;
251 case 3:
252 result = xs[2] - ys[2];
253 if (result)
254 return result;
255 case 2:
256 return *(int16_t*)xs - *(int16_t*)ys;
257 case 1:
258 return *xs - *ys;
259 case 0:
260 return 0;
261 }
262 }
263#endif /* CONFIG_WITH_OPTIMIZATION_HACKS */
264#ifdef VARIABLE_HASH
265 /* hash 2 */
266 if (!x->hash2)
267 ((struct variable *)x)->hash2 = variable_hash_2i (x->name, x->length);
268 if (!y->hash2)
269 ((struct variable *)y)->hash2 = variable_hash_2i (y->name, y->length);
270 result = x->hash2 - y->hash2;
271 if (result)
272 return result;
273#endif
274#ifdef CONFIG_WITH_OPTIMIZATION_HACKS
275 return memcmp (x->name, y->name, x->length);
276#else
277 return_STRING_N_COMPARE (x->name, y->name, x->length);
278#endif
279}
280
281#ifndef VARIABLE_BUCKETS
282# ifdef KMK /* Move to Makefile.kmk? */
283# define VARIABLE_BUCKETS 16384
284# else /*!KMK*/
285#define VARIABLE_BUCKETS 523
286# endif /*!KMK*/
287#endif
288#ifndef PERFILE_VARIABLE_BUCKETS
289#define PERFILE_VARIABLE_BUCKETS 23
290#endif
291#ifndef SMALL_SCOPE_VARIABLE_BUCKETS
292#define SMALL_SCOPE_VARIABLE_BUCKETS 13
293#endif
294
295static struct variable_set global_variable_set;
296static struct variable_set_list global_setlist
297 = { 0, &global_variable_set };
298struct variable_set_list *current_variable_set_list = &global_setlist;
299
300
301/* Implement variables. */
302
303void
304init_hash_global_variable_set (void)
305{
306 hash_init (&global_variable_set.table, VARIABLE_BUCKETS,
307 variable_hash_1, variable_hash_2, variable_hash_cmp);
308}
309
310/* Define variable named NAME with value VALUE in SET. VALUE is copied.
311 LENGTH is the length of NAME, which does not need to be null-terminated.
312 ORIGIN specifies the origin of the variable (makefile, command line
313 or environment).
314 If RECURSIVE is nonzero a flag is set in the variable saying
315 that it should be recursively re-expanded. */
316
317#ifdef CONFIG_WITH_VALUE_LENGTH
318struct variable *
319define_variable_in_set (const char *name, unsigned int length,
320 const char *value, unsigned int value_length, int duplicate_value,
321 enum variable_origin origin, int recursive,
322 struct variable_set *set, const struct floc *flocp)
323#else
324struct variable *
325define_variable_in_set (const char *name, unsigned int length,
326 const char *value, enum variable_origin origin,
327 int recursive, struct variable_set *set,
328 const struct floc *flocp)
329#endif
330{
331 struct variable *v;
332 struct variable **var_slot;
333 struct variable var_key;
334
335 if (set == NULL)
336 set = &global_variable_set;
337
338 var_key.name = (char *) name;
339 var_key.length = length;
340#ifdef VARIABLE_HASH /* bird */
341 var_key.hash1 = variable_hash_1i (name, length);
342 var_key.hash2 = 0;
343#endif
344 var_slot = (struct variable **) hash_find_slot (&set->table, &var_key);
345
346 if (env_overrides && origin == o_env)
347 origin = o_env_override;
348
349 v = *var_slot;
350 if (! HASH_VACANT (v))
351 {
352 if (env_overrides && v->origin == o_env)
353 /* V came from in the environment. Since it was defined
354 before the switches were parsed, it wasn't affected by -e. */
355 v->origin = o_env_override;
356
357 /* A variable of this name is already defined.
358 If the old definition is from a stronger source
359 than this one, don't redefine it. */
360 if ((int) origin >= (int) v->origin)
361 {
362#ifdef CONFIG_WITH_VALUE_LENGTH
363 if (value_length == ~0U)
364 value_length = strlen (value);
365 else
366 assert (value_length == strlen (value));
367 if (!duplicate_value)
368 {
369 if (v->value != 0)
370 free (v->value);
371 v->value = (char *)value;
372 v->value_alloc_len = value_length + 1;
373 }
374 else
375 {
376 if ((unsigned int)v->value_alloc_len <= value_length)
377 {
378 free (v->value);
379 v->value_alloc_len = (value_length + 0x40) & ~0x3f;
380 v->value = xmalloc (v->value_alloc_len);
381 }
382 memcpy (v->value, value, value_length + 1);
383 }
384 v->value_length = value_length;
385#else
386 if (v->value != 0)
387 free (v->value);
388 v->value = xstrdup (value);
389#endif
390 if (flocp != 0)
391 v->fileinfo = *flocp;
392 else
393 v->fileinfo.filenm = 0;
394 v->origin = origin;
395 v->recursive = recursive;
396 }
397 return v;
398 }
399
400 /* Create a new variable definition and add it to the hash table. */
401
402 v = xmalloc (sizeof (struct variable));
403 v->name = savestring (name, length);
404 v->length = length;
405#ifdef VARIABLE_HASH /* bird */
406 v->hash1 = variable_hash_1i (name, length);
407 v->hash2 = 0;
408#endif
409 hash_insert_at (&set->table, v, var_slot);
410#ifdef CONFIG_WITH_VALUE_LENGTH
411 if (value_length == ~0U)
412 value_length = strlen (value);
413 else
414 assert (value_length == strlen (value));
415 v->value_length = value_length;
416 if (!duplicate_value)
417 {
418 v->value_alloc_len = value_length + 1;
419 v->value = (char *)value;
420 }
421 else
422 {
423 v->value_alloc_len = (value_length + 32) & ~31;
424 v->value = xmalloc (v->value_alloc_len);
425 memcpy (v->value, value, value_length + 1);
426 }
427#else
428 v->value = xstrdup (value);
429#endif
430 if (flocp != 0)
431 v->fileinfo = *flocp;
432 else
433 v->fileinfo.filenm = 0;
434 v->origin = origin;
435 v->recursive = recursive;
436 v->special = 0;
437 v->expanding = 0;
438 v->exp_count = 0;
439 v->per_target = 0;
440 v->append = 0;
441 v->export = v_default;
442
443 v->exportable = 1;
444 if (*name != '_' && (*name < 'A' || *name > 'Z')
445 && (*name < 'a' || *name > 'z'))
446 v->exportable = 0;
447 else
448 {
449 for (++name; *name != '\0'; ++name)
450 if (*name != '_' && (*name < 'a' || *name > 'z')
451 && (*name < 'A' || *name > 'Z') && !ISDIGIT(*name))
452 break;
453
454 if (*name != '\0')
455 v->exportable = 0;
456 }
457
458 return v;
459}
460
461
462/* If the variable passed in is "special", handle its special nature.
463 Currently there are two such variables, both used for introspection:
464 .VARIABLES expands to a list of all the variables defined in this instance
465 of make.
466 .TARGETS expands to a list of all the targets defined in this
467 instance of make.
468 Returns the variable reference passed in. */
469
470#define EXPANSION_INCREMENT(_l) ((((_l) / 500) + 1) * 500)
471
472static struct variable *
473handle_special_var (struct variable *var)
474{
475 static unsigned long last_var_count = 0;
476
477
478 /* This one actually turns out to be very hard, due to the way the parser
479 records targets. The way it works is that target information is collected
480 internally until make knows the target is completely specified. It unitl
481 it sees that some new construct (a new target or variable) is defined that
482 it knows the previous one is done. In short, this means that if you do
483 this:
484
485 all:
486
487 TARGS := $(.TARGETS)
488
489 then $(TARGS) won't contain "all", because it's not until after the
490 variable is created that the previous target is completed.
491
492 Changing this would be a major pain. I think a less complex way to do it
493 would be to pre-define the target files as soon as the first line is
494 parsed, then come back and do the rest of the definition as now. That
495 would allow $(.TARGETS) to be correct without a major change to the way
496 the parser works.
497
498 if (streq (var->name, ".TARGETS"))
499 var->value = build_target_list (var->value);
500 else
501 */
502
503 if (streq (var->name, ".VARIABLES")
504 && global_variable_set.table.ht_fill != last_var_count)
505 {
506 unsigned long max = EXPANSION_INCREMENT (strlen (var->value));
507 unsigned long len;
508 char *p;
509 struct variable **vp = (struct variable **) global_variable_set.table.ht_vec;
510 struct variable **end = &vp[global_variable_set.table.ht_size];
511
512 /* Make sure we have at least MAX bytes in the allocated buffer. */
513 var->value = xrealloc (var->value, max);
514
515 /* Walk through the hash of variables, constructing a list of names. */
516 p = var->value;
517 len = 0;
518 for (; vp < end; ++vp)
519 if (!HASH_VACANT (*vp))
520 {
521 struct variable *v = *vp;
522 int l = v->length;
523
524 len += l + 1;
525 if (len > max)
526 {
527 unsigned long off = p - var->value;
528
529 max += EXPANSION_INCREMENT (l + 1);
530 var->value = xrealloc (var->value, max);
531 p = &var->value[off];
532 }
533
534 memcpy (p, v->name, l);
535 p += l;
536 *(p++) = ' ';
537 }
538 *(p-1) = '\0';
539
540 /* Remember how many variables are in our current count. Since we never
541 remove variables from the list, this is a reliable way to know whether
542 the list is up to date or needs to be recomputed. */
543
544 last_var_count = global_variable_set.table.ht_fill;
545 }
546
547 return var;
548}
549
550
551
552/* Lookup a variable whose name is a string starting at NAME
553 and with LENGTH chars. NAME need not be null-terminated.
554 Returns address of the `struct variable' containing all info
555 on the variable, or nil if no such variable is defined. */
556
557struct variable *
558lookup_variable (const char *name, unsigned int length)
559{
560 const struct variable_set_list *setlist;
561 struct variable var_key;
562
563 var_key.name = (char *) name;
564 var_key.length = length;
565#ifdef VARIABLE_HASH /* bird */
566 var_key.hash1 = variable_hash_1i (name, length);
567 var_key.hash2 = 0;
568#endif
569
570 for (setlist = current_variable_set_list;
571 setlist != 0; setlist = setlist->next)
572 {
573#ifdef VARIABLE_HASH /* bird: speed */
574 struct hash_table *ht = &setlist->set->table;
575 unsigned int hash_1 = var_key.hash1;
576 struct variable *v;
577
578 ht->ht_lookups++;
579 for (;;)
580 {
581 hash_1 &= (ht->ht_size - 1);
582 v = (struct variable *)ht->ht_vec[hash_1];
583
584 if (v == 0)
585 break;
586 if ((void *)v != hash_deleted_item)
587 {
588 if (variable_hash_cmp(&var_key, v) == 0)
589 {
590# ifdef VARIABLE_HASH_STRICT /* bird */
591 struct variable *v2 = (struct variable *) hash_find_item ((struct hash_table *) &setlist->set->table, &var_key);
592 assert(v2 == v);
593# endif
594 return v->special ? handle_special_var (v) : v;
595 }
596 ht->ht_collisions++;
597 }
598 if (!var_key.hash2)
599 var_key.hash2 = variable_hash_2i(name, length);
600 hash_1 += (var_key.hash2 | 1);
601 }
602
603#else /* !VARIABLE_HASH */
604 const struct variable_set *set = setlist->set;
605 struct variable *v;
606
607 v = (struct variable *) hash_find_item ((struct hash_table *) &set->table, &var_key);
608 if (v)
609 return v->special ? handle_special_var (v) : v;
610#endif /* !VARIABLE_HASH */
611 }
612
613#ifdef VMS
614 /* since we don't read envp[] on startup, try to get the
615 variable via getenv() here. */
616 {
617 char *vname = alloca (length + 1);
618 char *value;
619 strncpy (vname, name, length);
620 vname[length] = 0;
621 value = getenv (vname);
622 if (value != 0)
623 {
624 char *sptr;
625 int scnt;
626
627 sptr = value;
628 scnt = 0;
629
630 while ((sptr = strchr (sptr, '$')))
631 {
632 scnt++;
633 sptr++;
634 }
635
636 if (scnt > 0)
637 {
638 char *nvalue;
639 char *nptr;
640
641 nvalue = alloca (strlen (value) + scnt + 1);
642 sptr = value;
643 nptr = nvalue;
644
645 while (*sptr)
646 {
647 if (*sptr == '$')
648 {
649 *nptr++ = '$';
650 *nptr++ = '$';
651 }
652 else
653 {
654 *nptr++ = *sptr;
655 }
656 sptr++;
657 }
658
659 *nptr = '\0';
660 return define_variable (vname, length, nvalue, o_env, 1);
661
662 }
663
664 return define_variable (vname, length, value, o_env, 1);
665 }
666 }
667#endif /* VMS */
668
669 return 0;
670}
671
672
673/* Lookup a variable whose name is a string starting at NAME
674 and with LENGTH chars in set SET. NAME need not be null-terminated.
675 Returns address of the `struct variable' containing all info
676 on the variable, or nil if no such variable is defined. */
677
678struct variable *
679lookup_variable_in_set (const char *name, unsigned int length,
680 const struct variable_set *set)
681{
682 struct variable var_key;
683
684 var_key.name = (char *) name;
685 var_key.length = length;
686#ifdef VARIABLE_HASH /* bird */
687 var_key.hash1 = variable_hash_1i (name, length);
688 var_key.hash2 = 0;
689#endif
690
691 return (struct variable *) hash_find_item ((struct hash_table *) &set->table, &var_key);
692}
693
694
695/* Initialize FILE's variable set list. If FILE already has a variable set
696 list, the topmost variable set is left intact, but the the rest of the
697 chain is replaced with FILE->parent's setlist. If FILE is a double-colon
698 rule, then we will use the "root" double-colon target's variable set as the
699 parent of FILE's variable set.
700
701 If we're READING a makefile, don't do the pattern variable search now,
702 since the pattern variable might not have been defined yet. */
703
704void
705initialize_file_variables (struct file *file, int reading)
706{
707 struct variable_set_list *l = file->variables;
708
709 if (l == 0)
710 {
711 l = (struct variable_set_list *)
712 xmalloc (sizeof (struct variable_set_list));
713 l->set = xmalloc (sizeof (struct variable_set));
714 hash_init (&l->set->table, PERFILE_VARIABLE_BUCKETS,
715 variable_hash_1, variable_hash_2, variable_hash_cmp);
716 file->variables = l;
717 }
718
719 /* If this is a double-colon, then our "parent" is the "root" target for
720 this double-colon rule. Since that rule has the same name, parent,
721 etc. we can just use its variables as the "next" for ours. */
722
723 if (file->double_colon && file->double_colon != file)
724 {
725 initialize_file_variables (file->double_colon, reading);
726 l->next = file->double_colon->variables;
727 return;
728 }
729
730 if (file->parent == 0)
731 l->next = &global_setlist;
732 else
733 {
734 initialize_file_variables (file->parent, reading);
735 l->next = file->parent->variables;
736 }
737
738 /* If we're not reading makefiles and we haven't looked yet, see if
739 we can find pattern variables for this target. */
740
741 if (!reading && !file->pat_searched)
742 {
743 struct pattern_var *p;
744
745 p = lookup_pattern_var (0, file->name);
746 if (p != 0)
747 {
748 struct variable_set_list *global = current_variable_set_list;
749
750 /* We found at least one. Set up a new variable set to accumulate
751 all the pattern variables that match this target. */
752
753 file->pat_variables = create_new_variable_set ();
754 current_variable_set_list = file->pat_variables;
755
756 do
757 {
758 /* We found one, so insert it into the set. */
759
760 struct variable *v;
761
762 if (p->variable.flavor == f_simple)
763 {
764 v = define_variable_loc (
765 p->variable.name, strlen (p->variable.name),
766 p->variable.value, p->variable.origin,
767 0, &p->variable.fileinfo);
768
769 v->flavor = f_simple;
770 }
771 else
772 {
773 v = do_variable_definition (
774 &p->variable.fileinfo, p->variable.name,
775 p->variable.value, p->variable.origin,
776 p->variable.flavor, 1);
777 }
778
779 /* Also mark it as a per-target and copy export status. */
780 v->per_target = p->variable.per_target;
781 v->export = p->variable.export;
782 }
783 while ((p = lookup_pattern_var (p, file->name)) != 0);
784
785 current_variable_set_list = global;
786 }
787 file->pat_searched = 1;
788 }
789
790 /* If we have a pattern variable match, set it up. */
791
792 if (file->pat_variables != 0)
793 {
794 file->pat_variables->next = l->next;
795 l->next = file->pat_variables;
796 }
797}
798
799
800/* Pop the top set off the current variable set list,
801 and free all its storage. */
802
803struct variable_set_list *
804create_new_variable_set (void)
805{
806 register struct variable_set_list *setlist;
807 register struct variable_set *set;
808
809 set = xmalloc (sizeof (struct variable_set));
810 hash_init (&set->table, SMALL_SCOPE_VARIABLE_BUCKETS,
811 variable_hash_1, variable_hash_2, variable_hash_cmp);
812
813 setlist = (struct variable_set_list *)
814 xmalloc (sizeof (struct variable_set_list));
815 setlist->set = set;
816 setlist->next = current_variable_set_list;
817
818 return setlist;
819}
820
821static void
822free_variable_name_and_value (const void *item)
823{
824 struct variable *v = (struct variable *) item;
825 free (v->name);
826 free (v->value);
827}
828
829void
830free_variable_set (struct variable_set_list *list)
831{
832 hash_map (&list->set->table, free_variable_name_and_value);
833 hash_free (&list->set->table, 1);
834 free (list->set);
835 free (list);
836}
837
838/* Create a new variable set and push it on the current setlist.
839 If we're pushing a global scope (that is, the current scope is the global
840 scope) then we need to "push" it the other way: file variable sets point
841 directly to the global_setlist so we need to replace that with the new one.
842 */
843
844struct variable_set_list *
845push_new_variable_scope (void)
846{
847 current_variable_set_list = create_new_variable_set();
848 if (current_variable_set_list->next == &global_setlist)
849 {
850 /* It was the global, so instead of new -> &global we want to replace
851 &global with the new one and have &global -> new, with current still
852 pointing to &global */
853 struct variable_set *set = current_variable_set_list->set;
854 current_variable_set_list->set = global_setlist.set;
855 global_setlist.set = set;
856 current_variable_set_list->next = global_setlist.next;
857 global_setlist.next = current_variable_set_list;
858 current_variable_set_list = &global_setlist;
859 }
860 return (current_variable_set_list);
861}
862
863void
864pop_variable_scope (void)
865{
866 struct variable_set_list *setlist;
867 struct variable_set *set;
868
869 /* Can't call this if there's no scope to pop! */
870 assert(current_variable_set_list->next != NULL);
871
872 if (current_variable_set_list != &global_setlist)
873 {
874 /* We're not pointing to the global setlist, so pop this one. */
875 setlist = current_variable_set_list;
876 set = setlist->set;
877 current_variable_set_list = setlist->next;
878 }
879 else
880 {
881 /* This set is the one in the global_setlist, but there is another global
882 set beyond that. We want to copy that set to global_setlist, then
883 delete what used to be in global_setlist. */
884 setlist = global_setlist.next;
885 set = global_setlist.set;
886 global_setlist.set = setlist->set;
887 global_setlist.next = setlist->next;
888 }
889
890 /* Free the one we no longer need. */
891 free (setlist);
892 hash_map (&set->table, free_variable_name_and_value);
893 hash_free (&set->table, 1);
894 free (set);
895}
896
897
898/* Merge FROM_SET into TO_SET, freeing unused storage in FROM_SET. */
899
900static void
901merge_variable_sets (struct variable_set *to_set,
902 struct variable_set *from_set)
903{
904 struct variable **from_var_slot = (struct variable **) from_set->table.ht_vec;
905 struct variable **from_var_end = from_var_slot + from_set->table.ht_size;
906
907 for ( ; from_var_slot < from_var_end; from_var_slot++)
908 if (! HASH_VACANT (*from_var_slot))
909 {
910 struct variable *from_var = *from_var_slot;
911 struct variable **to_var_slot
912 = (struct variable **) hash_find_slot (&to_set->table, *from_var_slot);
913 if (HASH_VACANT (*to_var_slot))
914 hash_insert_at (&to_set->table, from_var, to_var_slot);
915 else
916 {
917 /* GKM FIXME: delete in from_set->table */
918 free (from_var->value);
919 free (from_var);
920 }
921 }
922}
923
924/* Merge SETLIST1 into SETLIST0, freeing unused storage in SETLIST1. */
925
926void
927merge_variable_set_lists (struct variable_set_list **setlist0,
928 struct variable_set_list *setlist1)
929{
930 struct variable_set_list *to = *setlist0;
931 struct variable_set_list *last0 = 0;
932
933 /* If there's nothing to merge, stop now. */
934 if (!setlist1)
935 return;
936
937 /* This loop relies on the fact that all setlists terminate with the global
938 setlist (before NULL). If that's not true, arguably we SHOULD die. */
939 if (to)
940 while (setlist1 != &global_setlist && to != &global_setlist)
941 {
942 struct variable_set_list *from = setlist1;
943 setlist1 = setlist1->next;
944
945 merge_variable_sets (to->set, from->set);
946
947 last0 = to;
948 to = to->next;
949 }
950
951 if (setlist1 != &global_setlist)
952 {
953 if (last0 == 0)
954 *setlist0 = setlist1;
955 else
956 last0->next = setlist1;
957 }
958}
959
960
961/* Define the automatic variables, and record the addresses
962 of their structures so we can change their values quickly. */
963
964void
965define_automatic_variables (void)
966{
967#if defined(WINDOWS32) || defined(__EMX__)
968 extern char* default_shell;
969#else
970 extern char default_shell[];
971#endif
972 register struct variable *v;
973 char buf[200];
974#ifdef KMK
975 const char *envvar;
976#endif
977
978 sprintf (buf, "%u", makelevel);
979 (void) define_variable (MAKELEVEL_NAME, MAKELEVEL_LENGTH, buf, o_env, 0);
980
981 sprintf (buf, "%s%s%s",
982 version_string,
983 (remote_description == 0 || remote_description[0] == '\0')
984 ? "" : "-",
985 (remote_description == 0 || remote_description[0] == '\0')
986 ? "" : remote_description);
987 (void) define_variable ("MAKE_VERSION", 12, buf, o_default, 0);
988
989#ifdef KMK
990 /* Define KMK_VERSION to indicate kMk. */
991 (void) define_variable ("KMK_VERSION", 11, buf, o_default, 0);
992
993 /* Define KBUILD_VERSION* */
994 sprintf (buf, "%d", KBUILD_VERSION_MAJOR);
995 define_variable ("KBUILD_VERSION_MAJOR", sizeof ("KBUILD_VERSION_MAJOR") - 1,
996 buf, o_default, 0);
997 sprintf (buf, "%d", KBUILD_VERSION_MINOR);
998 define_variable ("KBUILD_VERSION_MINOR", sizeof("KBUILD_VERSION_MINOR") - 1,
999 buf, o_default, 0);
1000 sprintf (buf, "%d", KBUILD_VERSION_PATCH);
1001 define_variable ("KBUILD_VERSION_PATCH", sizeof ("KBUILD_VERSION_PATCH") - 1,
1002 buf, o_default, 0);
1003
1004 sprintf (buf, "%d.%d.%d", KBUILD_VERSION_MAJOR, KBUILD_VERSION_MINOR, KBUILD_VERSION_PATCH);
1005 define_variable ("KBUILD_VERSION", sizeof ("KBUILD_VERSION") - 1,
1006 buf, o_default, 0);
1007
1008 /* The build platform defaults. */
1009 envvar = getenv ("BUILD_PLATFORM");
1010 if (!envvar)
1011 define_variable ("BUILD_PLATFORM", sizeof ("BUILD_PLATFORM") - 1,
1012 BUILD_PLATFORM, o_default, 0);
1013 envvar = getenv ("BUILD_PLATFORM_ARCH");
1014 if (!envvar)
1015 define_variable ("BUILD_PLATFORM_ARCH", sizeof ("BUILD_PLATFORM_ARCH") - 1,
1016 BUILD_PLATFORM_ARCH, o_default, 0);
1017 envvar = getenv ("BUILD_PLATFORM_CPU");
1018 if (!envvar)
1019 define_variable ("BUILD_PLATFORM_CPU", sizeof ("BUILD_PLATFORM_CPU") - 1,
1020 BUILD_PLATFORM_CPU, o_default, 0);
1021
1022 /* The kBuild locations. */
1023 define_variable ("PATH_KBUILD", sizeof ("PATH_KBUILD") - 1,
1024 get_path_kbuild (), o_default, 0);
1025 define_variable ("PATH_KBUILD_BIN", sizeof ("PATH_KBUILD_BIN") - 1,
1026 get_path_kbuild_bin (), o_default, 0);
1027
1028 /* Define KMK_FEATURES to indicate various working KMK features. */
1029# if defined (CONFIG_WITH_RSORT) \
1030 && defined (CONFIG_WITH_ABSPATHEX) \
1031 && defined (CONFIG_WITH_TOUPPER_TOLOWER) \
1032 && defined (CONFIG_WITH_VALUE_LENGTH) && defined (CONFIG_WITH_COMPARE) \
1033 && defined (CONFIG_WITH_STACK) \
1034 && defined (CONFIG_WITH_MATH) \
1035 && defined (CONFIG_WITH_XARGS) \
1036 && defined (CONFIG_WITH_EXPLICIT_MULTITARGET) \
1037 && defined (CONFIG_WITH_PREPEND_ASSIGNMENT) \
1038 && defined (CONFIG_WITH_SET_CONDITIONALS) \
1039 && defined (CONFIG_WITH_DATE) \
1040 && defined (KMK_HELPERS)
1041 (void) define_variable ("KMK_FEATURES", 12,
1042 "append-dash-n abspath"
1043 " rsort"
1044 " abspathex"
1045 " toupper tolower"
1046 " comp-vars comp-cmds"
1047 " stack"
1048 " math-int"
1049 " xargs"
1050 " explicit-multitarget"
1051 " prepend-assignment"
1052 " set-conditionals"
1053 " date"
1054 " kb-src-tool kb-obj-base kb-obj-suff kb-src-prop kb-src-one "
1055 , o_default, 0);
1056# else /* MSC can't deal with strings mixed with #if/#endif, thus the slow way. */
1057# error "All features should be enabled by default!"
1058 strcpy (buf, "append-dash-n abspath");
1059# if defined (CONFIG_WITH_RSORT)
1060 strcat (buf, " rsort");
1061# endif
1062# if defined (CONFIG_WITH_ABSPATHEX)
1063 strcat (buf, " abspathex");
1064# endif
1065# if defined (CONFIG_WITH_TOUPPER_TOLOWER)
1066 strcat (buf, " toupper tolower");
1067# endif
1068# if defined (CONFIG_WITH_VALUE_LENGTH) && defined(CONFIG_WITH_COMPARE)
1069 strcat (buf, " comp-vars comp-cmds");
1070# endif
1071# if defined (CONFIG_WITH_STACK)
1072 strcat (buf, " stack");
1073# endif
1074# if defined (CONFIG_WITH_MATH)
1075 strcat (buf, " math-int");
1076# endif
1077# if defined (CONFIG_WITH_XARGS)
1078 strcat (buf, " xargs");
1079# endif
1080# if defined (CONFIG_WITH_EXPLICIT_MULTITARGET)
1081 strcat (buf, " explicit-multitarget");
1082# endif
1083# if defined (CONFIG_WITH_PREPEND_ASSIGNMENT)
1084 strcat (buf, " prepend-assignment");
1085# endif
1086# if defined (CONFIG_WITH_SET_CONDITIONALS)
1087 strcat (buf, " set-conditionals");
1088# endif
1089# if defined (CONFIG_WITH_DATE)
1090 strcat (buf, " date");
1091# endif
1092# if defined (KMK_HELPERS)
1093 strcat (buf, " kb-src-tool kb-obj-base kb-obj-suff kb-src-prop kb-src-one");
1094# endif
1095 (void) define_variable ("KMK_FEATURES", 12, buf, o_default, 0);
1096# endif
1097
1098#endif /* KMK */
1099
1100#ifdef CONFIG_WITH_KMK_BUILTIN
1101 /* The supported kMk Builtin commands. */
1102 (void) define_variable ("KMK_BUILTIN", 11, "append cat cp cmp echo install ln md5sum mkdir mv printf rm rmdir", o_default, 0);
1103#endif
1104
1105#ifdef __MSDOS__
1106 /* Allow to specify a special shell just for Make,
1107 and use $COMSPEC as the default $SHELL when appropriate. */
1108 {
1109 static char shell_str[] = "SHELL";
1110 const int shlen = sizeof (shell_str) - 1;
1111 struct variable *mshp = lookup_variable ("MAKESHELL", 9);
1112 struct variable *comp = lookup_variable ("COMSPEC", 7);
1113
1114 /* Make $MAKESHELL override $SHELL even if -e is in effect. */
1115 if (mshp)
1116 (void) define_variable (shell_str, shlen,
1117 mshp->value, o_env_override, 0);
1118 else if (comp)
1119 {
1120 /* $COMSPEC shouldn't override $SHELL. */
1121 struct variable *shp = lookup_variable (shell_str, shlen);
1122
1123 if (!shp)
1124 (void) define_variable (shell_str, shlen, comp->value, o_env, 0);
1125 }
1126 }
1127#elif defined(__EMX__)
1128 {
1129 static char shell_str[] = "SHELL";
1130 const int shlen = sizeof (shell_str) - 1;
1131 struct variable *shell = lookup_variable (shell_str, shlen);
1132 struct variable *replace = lookup_variable ("MAKESHELL", 9);
1133
1134 /* if $MAKESHELL is defined in the environment assume o_env_override */
1135 if (replace && *replace->value && replace->origin == o_env)
1136 replace->origin = o_env_override;
1137
1138 /* if $MAKESHELL is not defined use $SHELL but only if the variable
1139 did not come from the environment */
1140 if (!replace || !*replace->value)
1141 if (shell && *shell->value && (shell->origin == o_env
1142 || shell->origin == o_env_override))
1143 {
1144 /* overwrite whatever we got from the environment */
1145 free(shell->value);
1146 shell->value = xstrdup (default_shell);
1147 shell->origin = o_default;
1148 }
1149
1150 /* Some people do not like cmd to be used as the default
1151 if $SHELL is not defined in the Makefile.
1152 With -DNO_CMD_DEFAULT you can turn off this behaviour */
1153# ifndef NO_CMD_DEFAULT
1154 /* otherwise use $COMSPEC */
1155 if (!replace || !*replace->value)
1156 replace = lookup_variable ("COMSPEC", 7);
1157
1158 /* otherwise use $OS2_SHELL */
1159 if (!replace || !*replace->value)
1160 replace = lookup_variable ("OS2_SHELL", 9);
1161# else
1162# warning NO_CMD_DEFAULT: GNU make will not use CMD.EXE as default shell
1163# endif
1164
1165 if (replace && *replace->value)
1166 /* overwrite $SHELL */
1167 (void) define_variable (shell_str, shlen, replace->value,
1168 replace->origin, 0);
1169 else
1170 /* provide a definition if there is none */
1171 (void) define_variable (shell_str, shlen, default_shell,
1172 o_default, 0);
1173 }
1174
1175#endif
1176
1177 /* This won't override any definition, but it will provide one if there
1178 isn't one there. */
1179 v = define_variable ("SHELL", 5, default_shell, o_default, 0);
1180
1181 /* On MSDOS we do use SHELL from environment, since it isn't a standard
1182 environment variable on MSDOS, so whoever sets it, does that on purpose.
1183 On OS/2 we do not use SHELL from environment but we have already handled
1184 that problem above. */
1185#if !defined(__MSDOS__) && !defined(__EMX__)
1186 /* Don't let SHELL come from the environment. */
1187 if (*v->value == '\0' || v->origin == o_env || v->origin == o_env_override)
1188 {
1189 free (v->value);
1190 v->origin = o_file;
1191 v->value = xstrdup (default_shell);
1192#ifdef CONFIG_WITH_VALUE_LENGTH
1193 v->value_length = strlen (v->value);
1194 v->value_alloc_len = v->value_length + 1;
1195#endif
1196 }
1197#endif
1198
1199 /* Make sure MAKEFILES gets exported if it is set. */
1200 v = define_variable ("MAKEFILES", 9, "", o_default, 0);
1201 v->export = v_ifset;
1202
1203 /* Define the magic D and F variables in terms of
1204 the automatic variables they are variations of. */
1205
1206#ifdef VMS
1207 define_variable ("@D", 2, "$(dir $@)", o_automatic, 1);
1208 define_variable ("%D", 2, "$(dir $%)", o_automatic, 1);
1209 define_variable ("*D", 2, "$(dir $*)", o_automatic, 1);
1210 define_variable ("<D", 2, "$(dir $<)", o_automatic, 1);
1211 define_variable ("?D", 2, "$(dir $?)", o_automatic, 1);
1212 define_variable ("^D", 2, "$(dir $^)", o_automatic, 1);
1213 define_variable ("+D", 2, "$(dir $+)", o_automatic, 1);
1214#else
1215 define_variable ("@D", 2, "$(patsubst %/,%,$(dir $@))", o_automatic, 1);
1216 define_variable ("%D", 2, "$(patsubst %/,%,$(dir $%))", o_automatic, 1);
1217 define_variable ("*D", 2, "$(patsubst %/,%,$(dir $*))", o_automatic, 1);
1218 define_variable ("<D", 2, "$(patsubst %/,%,$(dir $<))", o_automatic, 1);
1219 define_variable ("?D", 2, "$(patsubst %/,%,$(dir $?))", o_automatic, 1);
1220 define_variable ("^D", 2, "$(patsubst %/,%,$(dir $^))", o_automatic, 1);
1221 define_variable ("+D", 2, "$(patsubst %/,%,$(dir $+))", o_automatic, 1);
1222#endif
1223 define_variable ("@F", 2, "$(notdir $@)", o_automatic, 1);
1224 define_variable ("%F", 2, "$(notdir $%)", o_automatic, 1);
1225 define_variable ("*F", 2, "$(notdir $*)", o_automatic, 1);
1226 define_variable ("<F", 2, "$(notdir $<)", o_automatic, 1);
1227 define_variable ("?F", 2, "$(notdir $?)", o_automatic, 1);
1228 define_variable ("^F", 2, "$(notdir $^)", o_automatic, 1);
1229 define_variable ("+F", 2, "$(notdir $+)", o_automatic, 1);
1230}
1231
1232
1233int export_all_variables;
1234
1235/* Create a new environment for FILE's commands.
1236 If FILE is nil, this is for the `shell' function.
1237 The child's MAKELEVEL variable is incremented. */
1238
1239char **
1240target_environment (struct file *file)
1241{
1242 struct variable_set_list *set_list;
1243 register struct variable_set_list *s;
1244 struct hash_table table;
1245 struct variable **v_slot;
1246 struct variable **v_end;
1247 struct variable makelevel_key;
1248 char **result_0;
1249 char **result;
1250
1251 if (file == 0)
1252 set_list = current_variable_set_list;
1253 else
1254 set_list = file->variables;
1255
1256 hash_init (&table, VARIABLE_BUCKETS,
1257 variable_hash_1, variable_hash_2, variable_hash_cmp);
1258
1259 /* Run through all the variable sets in the list,
1260 accumulating variables in TABLE. */
1261 for (s = set_list; s != 0; s = s->next)
1262 {
1263 struct variable_set *set = s->set;
1264 v_slot = (struct variable **) set->table.ht_vec;
1265 v_end = v_slot + set->table.ht_size;
1266 for ( ; v_slot < v_end; v_slot++)
1267 if (! HASH_VACANT (*v_slot))
1268 {
1269 struct variable **new_slot;
1270 struct variable *v = *v_slot;
1271
1272 /* If this is a per-target variable and it hasn't been touched
1273 already then look up the global version and take its export
1274 value. */
1275 if (v->per_target && v->export == v_default)
1276 {
1277 struct variable *gv;
1278
1279 gv = lookup_variable_in_set (v->name, strlen(v->name),
1280 &global_variable_set);
1281 if (gv)
1282 v->export = gv->export;
1283 }
1284
1285 switch (v->export)
1286 {
1287 case v_default:
1288 if (v->origin == o_default || v->origin == o_automatic)
1289 /* Only export default variables by explicit request. */
1290 continue;
1291
1292 /* The variable doesn't have a name that can be exported. */
1293 if (! v->exportable)
1294 continue;
1295
1296 if (! export_all_variables
1297 && v->origin != o_command
1298 && v->origin != o_env && v->origin != o_env_override)
1299 continue;
1300 break;
1301
1302 case v_export:
1303 break;
1304
1305 case v_noexport:
1306 /* If this is the SHELL variable and it's not exported, then
1307 add the value from our original environment. */
1308 if (streq (v->name, "SHELL"))
1309 {
1310 extern struct variable shell_var;
1311 v = &shell_var;
1312 break;
1313 }
1314 continue;
1315
1316 case v_ifset:
1317 if (v->origin == o_default)
1318 continue;
1319 break;
1320 }
1321
1322 new_slot = (struct variable **) hash_find_slot (&table, v);
1323 if (HASH_VACANT (*new_slot))
1324 hash_insert_at (&table, v, new_slot);
1325 }
1326 }
1327
1328 makelevel_key.name = MAKELEVEL_NAME;
1329 makelevel_key.length = MAKELEVEL_LENGTH;
1330#ifdef VARIABLE_HASH /* bird */
1331 makelevel_key.hash1 = variable_hash_1i (MAKELEVEL_NAME, MAKELEVEL_LENGTH);
1332 makelevel_key.hash2 = 0;
1333#endif
1334 hash_delete (&table, &makelevel_key);
1335
1336 result = result_0 = xmalloc ((table.ht_fill + 2) * sizeof (char *));
1337
1338 v_slot = (struct variable **) table.ht_vec;
1339 v_end = v_slot + table.ht_size;
1340 for ( ; v_slot < v_end; v_slot++)
1341 if (! HASH_VACANT (*v_slot))
1342 {
1343 struct variable *v = *v_slot;
1344
1345 /* If V is recursively expanded and didn't come from the environment,
1346 expand its value. If it came from the environment, it should
1347 go back into the environment unchanged. */
1348 if (v->recursive
1349 && v->origin != o_env && v->origin != o_env_override)
1350 {
1351 char *value = recursively_expand_for_file (v, file);
1352#ifdef WINDOWS32
1353 if (strcmp(v->name, "Path") == 0 ||
1354 strcmp(v->name, "PATH") == 0)
1355 convert_Path_to_windows32(value, ';');
1356#endif
1357 *result++ = xstrdup (concat (v->name, "=", value));
1358 free (value);
1359 }
1360 else
1361 {
1362#ifdef WINDOWS32
1363 if (strcmp(v->name, "Path") == 0 ||
1364 strcmp(v->name, "PATH") == 0)
1365 convert_Path_to_windows32(v->value, ';');
1366#endif
1367 *result++ = xstrdup (concat (v->name, "=", v->value));
1368 }
1369 }
1370
1371 *result = xmalloc (100);
1372 sprintf (*result, "%s=%u", MAKELEVEL_NAME, makelevel + 1);
1373 *++result = 0;
1374
1375 hash_free (&table, 0);
1376
1377 return result_0;
1378}
1379
1380
1381#ifdef CONFIG_WITH_VALUE_LENGTH
1382static struct variable *
1383do_variable_definition_append (const struct floc *flocp, struct variable *v, const char *value,
1384 enum variable_origin origin, int append)
1385{
1386 if (env_overrides && origin == o_env)
1387 origin = o_env_override;
1388
1389 if (env_overrides && v->origin == o_env)
1390 /* V came from in the environment. Since it was defined
1391 before the switches were parsed, it wasn't affected by -e. */
1392 v->origin = o_env_override;
1393
1394 /* A variable of this name is already defined.
1395 If the old definition is from a stronger source
1396 than this one, don't redefine it. */
1397 if ((int) origin < (int) v->origin)
1398 return v;
1399 v->origin = origin;
1400
1401 /* location */
1402 if (flocp != 0)
1403 v->fileinfo = *flocp;
1404
1405 /* The juicy bits, append the specified value to the variable
1406 This is a heavily exercised code path in kBuild. */
1407 if (v->recursive)
1408 {
1409 /* The previous definition of the variable was recursive.
1410 The new value is the unexpanded old and new values. */
1411 unsigned int value_len = strlen (value);
1412 unsigned int new_value_len = value_len + (v->value_length != 0 ? 1 + v->value_length : 0);
1413 int done_1st_prepend_copy = 0;
1414
1415 /* adjust the size. */
1416 if ((unsigned)v->value_alloc_len <= new_value_len)
1417 {
1418 v->value_alloc_len *= 2;
1419 if (v->value_alloc_len < new_value_len)
1420 v->value_alloc_len = (new_value_len + value_len + 0x7f) + ~0x7fU;
1421 if (append || !v->value_length)
1422 v->value = xrealloc (v->value, v->value_alloc_len);
1423 else
1424 {
1425 /* avoid the extra memcpy the xrealloc may have to do */
1426 char *new_buf = xmalloc (v->value_alloc_len);
1427 memcpy (&new_buf[value_len + 1], v->value, v->value_length + 1);
1428 done_1st_prepend_copy = 1;
1429 free (v->value);
1430 v->value = new_buf;
1431 }
1432 }
1433
1434 /* insert the new bits */
1435 if (v->value_length != 0)
1436 {
1437 if (append)
1438 {
1439 v->value[v->value_length] = ' ';
1440 memcpy (&v->value[v->value_length + 1], value, value_len + 1);
1441 }
1442 else
1443 {
1444 if (!done_1st_prepend_copy)
1445 memmove (&v->value[value_len + 1], v->value, v->value_length + 1);
1446 v->value[value_len] = ' ';
1447 memcpy (v->value, value, value_len);
1448 }
1449 }
1450 else
1451 memcpy (v->value, value, value_len + 1);
1452 v->value_length = new_value_len;
1453 }
1454 else
1455 {
1456 /* The previous definition of the variable was simple.
1457 The new value comes from the old value, which was expanded
1458 when it was set; and from the expanded new value. */
1459 append_expanded_string_to_variable(v, value);
1460 }
1461
1462 /* update the variable */
1463 return v;
1464}
1465#endif /* CONFIG_WITH_VALUE_LENGTH */
1466
1467
1468/* Given a variable, a value, and a flavor, define the variable.
1469 See the try_variable_definition() function for details on the parameters. */
1470
1471struct variable *
1472do_variable_definition (const struct floc *flocp, const char *varname,
1473 const char *value, enum variable_origin origin,
1474 enum variable_flavor flavor, int target_var)
1475{
1476 const char *p;
1477 char *alloc_value = NULL;
1478 struct variable *v;
1479 int append = 0;
1480 int conditional = 0;
1481 const size_t varname_len = strlen (varname); /* bird */
1482#ifdef CONFIG_WITH_VALUE_LENGTH
1483 unsigned int value_len = ~0U;
1484#endif
1485
1486 /* Calculate the variable's new value in VALUE. */
1487
1488 switch (flavor)
1489 {
1490 default:
1491 case f_bogus:
1492 /* Should not be possible. */
1493 abort ();
1494 case f_simple:
1495 /* A simple variable definition "var := value". Expand the value.
1496 We have to allocate memory since otherwise it'll clobber the
1497 variable buffer, and we may still need that if we're looking at a
1498 target-specific variable. */
1499 p = alloc_value = allocated_variable_expand (value);
1500 break;
1501 case f_conditional:
1502 /* A conditional variable definition "var ?= value".
1503 The value is set IFF the variable is not defined yet. */
1504 v = lookup_variable (varname, varname_len);
1505 if (v)
1506 return v;
1507
1508 conditional = 1;
1509 flavor = f_recursive;
1510 /* FALLTHROUGH */
1511 case f_recursive:
1512 /* A recursive variable definition "var = value".
1513 The value is used verbatim. */
1514 p = value;
1515 break;
1516#ifdef CONFIG_WITH_PREPEND_ASSIGNMENT
1517 case f_append:
1518 case f_prepend:
1519 {
1520 const enum variable_flavor org_flavor = flavor;
1521#else
1522 case f_append:
1523 {
1524#endif
1525
1526 /* If we have += but we're in a target variable context, we want to
1527 append only with other variables in the context of this target. */
1528 if (target_var)
1529 {
1530 append = 1;
1531 v = lookup_variable_in_set (varname, varname_len,
1532 current_variable_set_list->set);
1533
1534 /* Don't append from the global set if a previous non-appending
1535 target-specific variable definition exists. */
1536 if (v && !v->append)
1537 append = 0;
1538 }
1539 else
1540 v = lookup_variable (varname, varname_len);
1541
1542 if (v == 0)
1543 {
1544 /* There was no old value.
1545 This becomes a normal recursive definition. */
1546 p = value;
1547 flavor = f_recursive;
1548 }
1549 else
1550 {
1551#ifdef CONFIG_WITH_VALUE_LENGTH
1552 v->append = append;
1553# ifdef CONFIG_WITH_PREPEND_ASSIGNMENT
1554 return do_variable_definition_append (flocp, v, value, origin, org_flavor == f_append);
1555# else
1556 return do_variable_definition_append (flocp, v, value, origin, 1);
1557# endif
1558#else /* !CONFIG_WITH_VALUE_LENGTH */
1559
1560 /* Paste the old and new values together in VALUE. */
1561
1562 unsigned int oldlen, vallen;
1563 const char *val;
1564 char *tp;
1565
1566 val = value;
1567 if (v->recursive)
1568 /* The previous definition of the variable was recursive.
1569 The new value is the unexpanded old and new values. */
1570 flavor = f_recursive;
1571 else
1572 /* The previous definition of the variable was simple.
1573 The new value comes from the old value, which was expanded
1574 when it was set; and from the expanded new value. Allocate
1575 memory for the expansion as we may still need the rest of the
1576 buffer if we're looking at a target-specific variable. */
1577 val = alloc_value = allocated_variable_expand (val);
1578
1579 oldlen = strlen (v->value);
1580 vallen = strlen (val);
1581 tp = alloca (oldlen + 1 + vallen + 1);
1582# ifdef CONFIG_WITH_PREPEND_ASSIGNMENT
1583 if (org_flavor == f_prepend)
1584 {
1585 memcpy (tp, val, vallen);
1586 tp[oldlen] = ' ';
1587 memcpy (&tp[oldlen + 1], v->value, oldlen + 1);
1588 }
1589 else
1590# endif /* CONFIG_WITH_PREPEND_ASSIGNMENT */
1591 {
1592 memcpy (tp, v->value, oldlen);
1593 tp[oldlen] = ' ';
1594 memcpy (&tp[oldlen + 1], val, vallen + 1);
1595 }
1596 p = tp;
1597#endif /* !CONFIG_WITH_VALUE_LENGTH */
1598 }
1599 }
1600 }
1601
1602#ifdef __MSDOS__
1603 /* Many Unix Makefiles include a line saying "SHELL=/bin/sh", but
1604 non-Unix systems don't conform to this default configuration (in
1605 fact, most of them don't even have `/bin'). On the other hand,
1606 $SHELL in the environment, if set, points to the real pathname of
1607 the shell.
1608 Therefore, we generally won't let lines like "SHELL=/bin/sh" from
1609 the Makefile override $SHELL from the environment. But first, we
1610 look for the basename of the shell in the directory where SHELL=
1611 points, and along the $PATH; if it is found in any of these places,
1612 we define $SHELL to be the actual pathname of the shell. Thus, if
1613 you have bash.exe installed as d:/unix/bash.exe, and d:/unix is on
1614 your $PATH, then SHELL=/usr/local/bin/bash will have the effect of
1615 defining SHELL to be "d:/unix/bash.exe". */
1616 if ((origin == o_file || origin == o_override)
1617 && strcmp (varname, "SHELL") == 0)
1618 {
1619 PATH_VAR (shellpath);
1620 extern char * __dosexec_find_on_path (const char *, char *[], char *);
1621
1622 /* See if we can find "/bin/sh.exe", "/bin/sh.com", etc. */
1623 if (__dosexec_find_on_path (p, NULL, shellpath))
1624 {
1625 char *tp;
1626
1627 for (tp = shellpath; *tp; tp++)
1628 if (*tp == '\\')
1629 *tp = '/';
1630
1631 v = define_variable_loc (varname, varname_len,
1632 shellpath, origin, flavor == f_recursive,
1633 flocp);
1634 }
1635 else
1636 {
1637 const char *shellbase, *bslash;
1638 struct variable *pathv = lookup_variable ("PATH", 4);
1639 char *path_string;
1640 char *fake_env[2];
1641 size_t pathlen = 0;
1642
1643 shellbase = strrchr (p, '/');
1644 bslash = strrchr (p, '\\');
1645 if (!shellbase || bslash > shellbase)
1646 shellbase = bslash;
1647 if (!shellbase && p[1] == ':')
1648 shellbase = p + 1;
1649 if (shellbase)
1650 shellbase++;
1651 else
1652 shellbase = p;
1653
1654 /* Search for the basename of the shell (with standard
1655 executable extensions) along the $PATH. */
1656 if (pathv)
1657 pathlen = strlen (pathv->value);
1658 path_string = xmalloc (5 + pathlen + 2 + 1);
1659 /* On MSDOS, current directory is considered as part of $PATH. */
1660 sprintf (path_string, "PATH=.;%s", pathv ? pathv->value : "");
1661 fake_env[0] = path_string;
1662 fake_env[1] = 0;
1663 if (__dosexec_find_on_path (shellbase, fake_env, shellpath))
1664 {
1665 char *tp;
1666
1667 for (tp = shellpath; *tp; tp++)
1668 if (*tp == '\\')
1669 *tp = '/';
1670
1671 v = define_variable_loc (varname, varname_len,
1672 shellpath, origin,
1673 flavor == f_recursive, flocp);
1674 }
1675 else
1676 v = lookup_variable (varname, varname_len);
1677
1678 free (path_string);
1679 }
1680 }
1681 else
1682#endif /* __MSDOS__ */
1683#ifdef WINDOWS32
1684 if ( varname_len == sizeof("SHELL") - 1 /* bird */
1685 && (origin == o_file || origin == o_override || origin == o_command)
1686 && streq (varname, "SHELL"))
1687 {
1688 extern char *default_shell;
1689
1690 /* Call shell locator function. If it returns TRUE, then
1691 set no_default_sh_exe to indicate sh was found and
1692 set new value for SHELL variable. */
1693
1694 if (find_and_set_default_shell (p))
1695 {
1696 v = define_variable_in_set (varname, varname_len, default_shell,
1697# ifdef CONFIG_WITH_VALUE_LENGTH
1698 ~0U, 1 /* duplicate_value */,
1699# endif
1700 origin, flavor == f_recursive,
1701 (target_var
1702 ? current_variable_set_list->set
1703 : NULL),
1704 flocp);
1705 no_default_sh_exe = 0;
1706 }
1707 else
1708 v = lookup_variable (varname, varname_len);
1709# ifdef CONFIG_WITH_VALUE_LENGTH
1710 if (alloc_value)
1711 free (alloc_value);
1712# endif
1713 }
1714 else
1715#endif
1716
1717 /* If we are defining variables inside an $(eval ...), we might have a
1718 different variable context pushed, not the global context (maybe we're
1719 inside a $(call ...) or something. Since this function is only ever
1720 invoked in places where we want to define globally visible variables,
1721 make sure we define this variable in the global set. */
1722
1723 v = define_variable_in_set (varname, varname_len, p,
1724#ifdef CONFIG_WITH_VALUE_LENGTH
1725 value_len, !alloc_value,
1726#endif
1727 origin, flavor == f_recursive,
1728 (target_var
1729 ? current_variable_set_list->set : NULL),
1730 flocp);
1731 v->append = append;
1732 v->conditional = conditional;
1733
1734#ifndef CONFIG_WITH_VALUE_LENGTH
1735 if (alloc_value)
1736 free (alloc_value);
1737#endif
1738
1739 return v;
1740}
1741
1742
1743/* Try to interpret LINE (a null-terminated string) as a variable definition.
1744
1745 ORIGIN may be o_file, o_override, o_env, o_env_override,
1746 or o_command specifying that the variable definition comes
1747 from a makefile, an override directive, the environment with
1748 or without the -e switch, or the command line.
1749
1750 See the comments for parse_variable_definition().
1751
1752 If LINE was recognized as a variable definition, a pointer to its `struct
1753 variable' is returned. If LINE is not a variable definition, NULL is
1754 returned. */
1755
1756struct variable *
1757parse_variable_definition (struct variable *v, char *line)
1758{
1759 register int c;
1760 register char *p = line;
1761 register char *beg;
1762 register char *end;
1763 enum variable_flavor flavor = f_bogus;
1764 char *name;
1765
1766 while (1)
1767 {
1768 c = *p++;
1769 if (c == '\0' || c == '#')
1770 return 0;
1771 if (c == '=')
1772 {
1773 end = p - 1;
1774 flavor = f_recursive;
1775 break;
1776 }
1777 else if (c == ':')
1778 if (*p == '=')
1779 {
1780 end = p++ - 1;
1781 flavor = f_simple;
1782 break;
1783 }
1784 else
1785 /* A colon other than := is a rule line, not a variable defn. */
1786 return 0;
1787 else if (c == '+' && *p == '=')
1788 {
1789 end = p++ - 1;
1790 flavor = f_append;
1791 break;
1792 }
1793#ifdef CONFIG_WITH_PREPEND_ASSIGNMENT
1794 else if (c == '<' && *p == '=')
1795 {
1796 end = p++ - 1;
1797 flavor = f_prepend;
1798 break;
1799 }
1800#endif
1801 else if (c == '?' && *p == '=')
1802 {
1803 end = p++ - 1;
1804 flavor = f_conditional;
1805 break;
1806 }
1807 else if (c == '$')
1808 {
1809 /* This might begin a variable expansion reference. Make sure we
1810 don't misrecognize chars inside the reference as =, := or +=. */
1811 char closeparen;
1812 int count;
1813 c = *p++;
1814 if (c == '(')
1815 closeparen = ')';
1816 else if (c == '{')
1817 closeparen = '}';
1818 else
1819 continue; /* Nope. */
1820
1821 /* P now points past the opening paren or brace.
1822 Count parens or braces until it is matched. */
1823 count = 0;
1824 for (; *p != '\0'; ++p)
1825 {
1826 if (*p == c)
1827 ++count;
1828 else if (*p == closeparen && --count < 0)
1829 {
1830 ++p;
1831 break;
1832 }
1833 }
1834 }
1835 }
1836 v->flavor = flavor;
1837
1838 beg = next_token (line);
1839 while (end > beg && isblank ((unsigned char)end[-1]))
1840 --end;
1841 p = next_token (p);
1842 v->value = p;
1843#ifdef CONFIG_WITH_VALUE_LENGTH
1844 v->value_length = v->value_alloc_len = -1;
1845#endif
1846
1847 /* Expand the name, so "$(foo)bar = baz" works. */
1848 name = alloca (end - beg + 1);
1849 memcpy (name, beg, end - beg);
1850 name[end - beg] = '\0';
1851 v->name = allocated_variable_expand (name);
1852
1853 if (v->name[0] == '\0')
1854 fatal (&v->fileinfo, _("empty variable name"));
1855
1856 return v;
1857}
1858
1859
1860/* Try to interpret LINE (a null-terminated string) as a variable definition.
1861
1862 ORIGIN may be o_file, o_override, o_env, o_env_override,
1863 or o_command specifying that the variable definition comes
1864 from a makefile, an override directive, the environment with
1865 or without the -e switch, or the command line.
1866
1867 See the comments for parse_variable_definition().
1868
1869 If LINE was recognized as a variable definition, a pointer to its `struct
1870 variable' is returned. If LINE is not a variable definition, NULL is
1871 returned. */
1872
1873struct variable *
1874try_variable_definition (const struct floc *flocp, char *line,
1875 enum variable_origin origin, int target_var)
1876{
1877 struct variable v;
1878 struct variable *vp;
1879
1880 if (flocp != 0)
1881 v.fileinfo = *flocp;
1882 else
1883 v.fileinfo.filenm = 0;
1884
1885 if (!parse_variable_definition (&v, line))
1886 return 0;
1887
1888 vp = do_variable_definition (flocp, v.name, v.value,
1889 origin, v.flavor, target_var);
1890
1891 free (v.name);
1892
1893 return vp;
1894}
1895
1896
1897/* Print information for variable V, prefixing it with PREFIX. */
1898
1899static void
1900print_variable (const void *item, void *arg)
1901{
1902 const struct variable *v = item;
1903 const char *prefix = arg;
1904 const char *origin;
1905
1906 switch (v->origin)
1907 {
1908 case o_default:
1909 origin = _("default");
1910 break;
1911 case o_env:
1912 origin = _("environment");
1913 break;
1914 case o_file:
1915 origin = _("makefile");
1916 break;
1917 case o_env_override:
1918 origin = _("environment under -e");
1919 break;
1920 case o_command:
1921 origin = _("command line");
1922 break;
1923 case o_override:
1924 origin = _("`override' directive");
1925 break;
1926 case o_automatic:
1927 origin = _("automatic");
1928 break;
1929 case o_invalid:
1930 default:
1931 abort ();
1932 }
1933 fputs ("# ", stdout);
1934 fputs (origin, stdout);
1935 if (v->fileinfo.filenm)
1936 printf (_(" (from `%s', line %lu)"),
1937 v->fileinfo.filenm, v->fileinfo.lineno);
1938 putchar ('\n');
1939 fputs (prefix, stdout);
1940
1941 /* Is this a `define'? */
1942 if (v->recursive && strchr (v->value, '\n') != 0)
1943 printf ("define %s\n%s\nendef\n", v->name, v->value);
1944 else
1945 {
1946 register char *p;
1947
1948 printf ("%s %s= ", v->name, v->recursive ? v->append ? "+" : "" : ":");
1949
1950 /* Check if the value is just whitespace. */
1951 p = next_token (v->value);
1952 if (p != v->value && *p == '\0')
1953 /* All whitespace. */
1954 printf ("$(subst ,,%s)", v->value);
1955 else if (v->recursive)
1956 fputs (v->value, stdout);
1957 else
1958 /* Double up dollar signs. */
1959 for (p = v->value; *p != '\0'; ++p)
1960 {
1961 if (*p == '$')
1962 putchar ('$');
1963 putchar (*p);
1964 }
1965 putchar ('\n');
1966 }
1967}
1968
1969
1970/* Print all the variables in SET. PREFIX is printed before
1971 the actual variable definitions (everything else is comments). */
1972
1973void
1974print_variable_set (struct variable_set *set, char *prefix)
1975{
1976 hash_map_arg (&set->table, print_variable, prefix);
1977
1978 fputs (_("# variable set hash-table stats:\n"), stdout);
1979 fputs ("# ", stdout);
1980 hash_print_stats (&set->table, stdout);
1981 putc ('\n', stdout);
1982}
1983
1984/* Print the data base of variables. */
1985
1986void
1987print_variable_data_base (void)
1988{
1989 puts (_("\n# Variables\n"));
1990
1991 print_variable_set (&global_variable_set, "");
1992
1993 puts (_("\n# Pattern-specific Variable Values"));
1994
1995 {
1996 struct pattern_var *p;
1997 int rules = 0;
1998
1999 for (p = pattern_vars; p != 0; p = p->next)
2000 {
2001 ++rules;
2002 printf ("\n%s :\n", p->target);
2003 print_variable (&p->variable, "# ");
2004 }
2005
2006 if (rules == 0)
2007 puts (_("\n# No pattern-specific variable values."));
2008 else
2009 printf (_("\n# %u pattern-specific variable values"), rules);
2010 }
2011}
2012
2013
2014/* Print all the local variables of FILE. */
2015
2016void
2017print_file_variables (const struct file *file)
2018{
2019 if (file->variables != 0)
2020 print_variable_set (file->variables->set, "# ");
2021}
2022
2023#ifdef WINDOWS32
2024void
2025sync_Path_environment (void)
2026{
2027 char *path = allocated_variable_expand ("$(PATH)");
2028 static char *environ_path = NULL;
2029
2030 if (!path)
2031 return;
2032
2033 /*
2034 * If done this before, don't leak memory unnecessarily.
2035 * Free the previous entry before allocating new one.
2036 */
2037 if (environ_path)
2038 free (environ_path);
2039
2040 /*
2041 * Create something WINDOWS32 world can grok
2042 */
2043 convert_Path_to_windows32 (path, ';');
2044 environ_path = xstrdup (concat ("PATH", "=", path));
2045 putenv (environ_path);
2046 free (path);
2047}
2048#endif
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