kconfig: drop the ""trying to assign nonexistent symbol" warning
[linux-2.6.git] / scripts / kconfig / confdata.c
1 /*
2  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3  * Released under the terms of the GNU GPL v2.0.
4  */
5
6 #include <sys/stat.h>
7 #include <ctype.h>
8 #include <fcntl.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <time.h>
13 #include <unistd.h>
14
15 #define LKC_DIRECT_LINK
16 #include "lkc.h"
17
18 static void conf_warning(const char *fmt, ...)
19         __attribute__ ((format (printf, 1, 2)));
20
21 static const char *conf_filename;
22 static int conf_lineno, conf_warnings, conf_unsaved;
23
24 const char conf_defname[] = "arch/$ARCH/defconfig";
25
26 static void conf_warning(const char *fmt, ...)
27 {
28         va_list ap;
29         va_start(ap, fmt);
30         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
31         vfprintf(stderr, fmt, ap);
32         fprintf(stderr, "\n");
33         va_end(ap);
34         conf_warnings++;
35 }
36
37 const char *conf_get_configname(void)
38 {
39         char *name = getenv("KCONFIG_CONFIG");
40
41         return name ? name : ".config";
42 }
43
44 static char *conf_expand_value(const char *in)
45 {
46         struct symbol *sym;
47         const char *src;
48         static char res_value[SYMBOL_MAXLENGTH];
49         char *dst, name[SYMBOL_MAXLENGTH];
50
51         res_value[0] = 0;
52         dst = name;
53         while ((src = strchr(in, '$'))) {
54                 strncat(res_value, in, src - in);
55                 src++;
56                 dst = name;
57                 while (isalnum(*src) || *src == '_')
58                         *dst++ = *src++;
59                 *dst = 0;
60                 sym = sym_lookup(name, 0);
61                 sym_calc_value(sym);
62                 strcat(res_value, sym_get_string_value(sym));
63                 in = src;
64         }
65         strcat(res_value, in);
66
67         return res_value;
68 }
69
70 char *conf_get_default_confname(void)
71 {
72         struct stat buf;
73         static char fullname[PATH_MAX+1];
74         char *env, *name;
75
76         name = conf_expand_value(conf_defname);
77         env = getenv(SRCTREE);
78         if (env) {
79                 sprintf(fullname, "%s/%s", env, name);
80                 if (!stat(fullname, &buf))
81                         return fullname;
82         }
83         return name;
84 }
85
86 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
87 {
88         char *p2;
89
90         switch (sym->type) {
91         case S_TRISTATE:
92                 if (p[0] == 'm') {
93                         sym->def[def].tri = mod;
94                         sym->flags |= def_flags;
95                         break;
96                 }
97         case S_BOOLEAN:
98                 if (p[0] == 'y') {
99                         sym->def[def].tri = yes;
100                         sym->flags |= def_flags;
101                         break;
102                 }
103                 if (p[0] == 'n') {
104                         sym->def[def].tri = no;
105                         sym->flags |= def_flags;
106                         break;
107                 }
108                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
109                 break;
110         case S_OTHER:
111                 if (*p != '"') {
112                         for (p2 = p; *p2 && !isspace(*p2); p2++)
113                                 ;
114                         sym->type = S_STRING;
115                         goto done;
116                 }
117         case S_STRING:
118                 if (*p++ != '"')
119                         break;
120                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
121                         if (*p2 == '"') {
122                                 *p2 = 0;
123                                 break;
124                         }
125                         memmove(p2, p2 + 1, strlen(p2));
126                 }
127                 if (!p2) {
128                         conf_warning("invalid string found");
129                         return 1;
130                 }
131         case S_INT:
132         case S_HEX:
133         done:
134                 if (sym_string_valid(sym, p)) {
135                         sym->def[def].val = strdup(p);
136                         sym->flags |= def_flags;
137                 } else {
138                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
139                         return 1;
140                 }
141                 break;
142         default:
143                 ;
144         }
145         return 0;
146 }
147
148 int conf_read_simple(const char *name, int def)
149 {
150         FILE *in = NULL;
151         char line[1024];
152         char *p, *p2;
153         struct symbol *sym;
154         int i, def_flags;
155
156         if (name) {
157                 in = zconf_fopen(name);
158         } else {
159                 struct property *prop;
160
161                 name = conf_get_configname();
162                 in = zconf_fopen(name);
163                 if (in)
164                         goto load;
165                 sym_add_change_count(1);
166                 if (!sym_defconfig_list)
167                         return 1;
168
169                 for_all_defaults(sym_defconfig_list, prop) {
170                         if (expr_calc_value(prop->visible.expr) == no ||
171                             prop->expr->type != E_SYMBOL)
172                                 continue;
173                         name = conf_expand_value(prop->expr->left.sym->name);
174                         in = zconf_fopen(name);
175                         if (in) {
176                                 printf(_("#\n"
177                                          "# using defaults found in %s\n"
178                                          "#\n"), name);
179                                 goto load;
180                         }
181                 }
182         }
183         if (!in)
184                 return 1;
185
186 load:
187         conf_filename = name;
188         conf_lineno = 0;
189         conf_warnings = 0;
190         conf_unsaved = 0;
191
192         def_flags = SYMBOL_DEF << def;
193         for_all_symbols(i, sym) {
194                 sym->flags |= SYMBOL_CHANGED;
195                 sym->flags &= ~(def_flags|SYMBOL_VALID);
196                 if (sym_is_choice(sym))
197                         sym->flags |= def_flags;
198                 switch (sym->type) {
199                 case S_INT:
200                 case S_HEX:
201                 case S_STRING:
202                         if (sym->def[def].val)
203                                 free(sym->def[def].val);
204                 default:
205                         sym->def[def].val = NULL;
206                         sym->def[def].tri = no;
207                 }
208         }
209
210         while (fgets(line, sizeof(line), in)) {
211                 conf_lineno++;
212                 sym = NULL;
213                 switch (line[0]) {
214                 case '#':
215                         if (memcmp(line + 2, "CONFIG_", 7))
216                                 continue;
217                         p = strchr(line + 9, ' ');
218                         if (!p)
219                                 continue;
220                         *p++ = 0;
221                         if (strncmp(p, "is not set", 10))
222                                 continue;
223                         if (def == S_DEF_USER) {
224                                 sym = sym_find(line + 9);
225                                 if (!sym)
226                                         break;
227                         } else {
228                                 sym = sym_lookup(line + 9, 0);
229                                 if (sym->type == S_UNKNOWN)
230                                         sym->type = S_BOOLEAN;
231                         }
232                         if (sym->flags & def_flags) {
233                                 conf_warning("override: reassigning to symbol %s", sym->name);
234                         }
235                         switch (sym->type) {
236                         case S_BOOLEAN:
237                         case S_TRISTATE:
238                                 sym->def[def].tri = no;
239                                 sym->flags |= def_flags;
240                                 break;
241                         default:
242                                 ;
243                         }
244                         break;
245                 case 'C':
246                         if (memcmp(line, "CONFIG_", 7)) {
247                                 conf_warning("unexpected data");
248                                 continue;
249                         }
250                         p = strchr(line + 7, '=');
251                         if (!p)
252                                 continue;
253                         *p++ = 0;
254                         p2 = strchr(p, '\n');
255                         if (p2) {
256                                 *p2-- = 0;
257                                 if (*p2 == '\r')
258                                         *p2 = 0;
259                         }
260                         if (def == S_DEF_USER) {
261                                 sym = sym_find(line + 7);
262                                 if (!sym)
263                                         break;
264                         } else {
265                                 sym = sym_lookup(line + 7, 0);
266                                 if (sym->type == S_UNKNOWN)
267                                         sym->type = S_OTHER;
268                         }
269                         if (sym->flags & def_flags) {
270                                 conf_warning("override: reassigning to symbol %s", sym->name);
271                         }
272                         if (conf_set_sym_val(sym, def, def_flags, p))
273                                 continue;
274                         break;
275                 case '\r':
276                 case '\n':
277                         break;
278                 default:
279                         conf_warning("unexpected data");
280                         continue;
281                 }
282                 if (sym && sym_is_choice_value(sym)) {
283                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
284                         switch (sym->def[def].tri) {
285                         case no:
286                                 break;
287                         case mod:
288                                 if (cs->def[def].tri == yes) {
289                                         conf_warning("%s creates inconsistent choice state", sym->name);
290                                         cs->flags &= ~def_flags;
291                                 }
292                                 break;
293                         case yes:
294                                 if (cs->def[def].tri != no)
295                                         conf_warning("override: %s changes choice state", sym->name);
296                                 cs->def[def].val = sym;
297                                 break;
298                         }
299                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
300                 }
301         }
302         fclose(in);
303
304         if (modules_sym)
305                 sym_calc_value(modules_sym);
306         return 0;
307 }
308
309 int conf_read(const char *name)
310 {
311         struct symbol *sym, *choice_sym;
312         struct property *prop;
313         struct expr *e;
314         int i, flags;
315
316         sym_set_change_count(0);
317
318         if (conf_read_simple(name, S_DEF_USER))
319                 return 1;
320
321         for_all_symbols(i, sym) {
322                 sym_calc_value(sym);
323                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
324                         goto sym_ok;
325                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
326                         /* check that calculated value agrees with saved value */
327                         switch (sym->type) {
328                         case S_BOOLEAN:
329                         case S_TRISTATE:
330                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
331                                         break;
332                                 if (!sym_is_choice(sym))
333                                         goto sym_ok;
334                         default:
335                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
336                                         goto sym_ok;
337                                 break;
338                         }
339                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
340                         /* no previous value and not saved */
341                         goto sym_ok;
342                 conf_unsaved++;
343                 /* maybe print value in verbose mode... */
344         sym_ok:
345                 if (!sym_is_choice(sym))
346                         continue;
347                 /* The choice symbol only has a set value (and thus is not new)
348                  * if all its visible childs have values.
349                  */
350                 prop = sym_get_choice_prop(sym);
351                 flags = sym->flags;
352                 expr_list_for_each_sym(prop->expr, e, choice_sym)
353                         if (choice_sym->visible != no)
354                                 flags &= choice_sym->flags;
355                 sym->flags &= flags | ~SYMBOL_DEF_USER;
356         }
357
358         for_all_symbols(i, sym) {
359                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
360                         /* Reset values of generates values, so they'll appear
361                          * as new, if they should become visible, but that
362                          * doesn't quite work if the Kconfig and the saved
363                          * configuration disagree.
364                          */
365                         if (sym->visible == no && !conf_unsaved)
366                                 sym->flags &= ~SYMBOL_DEF_USER;
367                         switch (sym->type) {
368                         case S_STRING:
369                         case S_INT:
370                         case S_HEX:
371                                 /* Reset a string value if it's out of range */
372                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
373                                         break;
374                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
375                                 conf_unsaved++;
376                                 break;
377                         default:
378                                 break;
379                         }
380                 }
381         }
382
383         sym_add_change_count(conf_warnings || conf_unsaved);
384
385         return 0;
386 }
387
388 int conf_write(const char *name)
389 {
390         FILE *out;
391         struct symbol *sym;
392         struct menu *menu;
393         const char *basename;
394         char dirname[128], tmpname[128], newname[128];
395         int type, l;
396         const char *str;
397         time_t now;
398         int use_timestamp = 1;
399         char *env;
400
401         dirname[0] = 0;
402         if (name && name[0]) {
403                 struct stat st;
404                 char *slash;
405
406                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
407                         strcpy(dirname, name);
408                         strcat(dirname, "/");
409                         basename = conf_get_configname();
410                 } else if ((slash = strrchr(name, '/'))) {
411                         int size = slash - name + 1;
412                         memcpy(dirname, name, size);
413                         dirname[size] = 0;
414                         if (slash[1])
415                                 basename = slash + 1;
416                         else
417                                 basename = conf_get_configname();
418                 } else
419                         basename = name;
420         } else
421                 basename = conf_get_configname();
422
423         sprintf(newname, "%s%s", dirname, basename);
424         env = getenv("KCONFIG_OVERWRITECONFIG");
425         if (!env || !*env) {
426                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
427                 out = fopen(tmpname, "w");
428         } else {
429                 *tmpname = 0;
430                 out = fopen(newname, "w");
431         }
432         if (!out)
433                 return 1;
434
435         sym = sym_lookup("KERNELVERSION", 0);
436         sym_calc_value(sym);
437         time(&now);
438         env = getenv("KCONFIG_NOTIMESTAMP");
439         if (env && *env)
440                 use_timestamp = 0;
441
442         fprintf(out, _("#\n"
443                        "# Automatically generated make config: don't edit\n"
444                        "# Linux kernel version: %s\n"
445                        "%s%s"
446                        "#\n"),
447                      sym_get_string_value(sym),
448                      use_timestamp ? "# " : "",
449                      use_timestamp ? ctime(&now) : "");
450
451         if (!conf_get_changed())
452                 sym_clear_all_valid();
453
454         menu = rootmenu.list;
455         while (menu) {
456                 sym = menu->sym;
457                 if (!sym) {
458                         if (!menu_is_visible(menu))
459                                 goto next;
460                         str = menu_get_prompt(menu);
461                         fprintf(out, "\n"
462                                      "#\n"
463                                      "# %s\n"
464                                      "#\n", str);
465                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
466                         sym_calc_value(sym);
467                         if (!(sym->flags & SYMBOL_WRITE))
468                                 goto next;
469                         sym->flags &= ~SYMBOL_WRITE;
470                         type = sym->type;
471                         if (type == S_TRISTATE) {
472                                 sym_calc_value(modules_sym);
473                                 if (modules_sym->curr.tri == no)
474                                         type = S_BOOLEAN;
475                         }
476                         switch (type) {
477                         case S_BOOLEAN:
478                         case S_TRISTATE:
479                                 switch (sym_get_tristate_value(sym)) {
480                                 case no:
481                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
482                                         break;
483                                 case mod:
484                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
485                                         break;
486                                 case yes:
487                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
488                                         break;
489                                 }
490                                 break;
491                         case S_STRING:
492                                 str = sym_get_string_value(sym);
493                                 fprintf(out, "CONFIG_%s=\"", sym->name);
494                                 while (1) {
495                                         l = strcspn(str, "\"\\");
496                                         if (l) {
497                                                 fwrite(str, l, 1, out);
498                                                 str += l;
499                                         }
500                                         if (!*str)
501                                                 break;
502                                         fprintf(out, "\\%c", *str++);
503                                 }
504                                 fputs("\"\n", out);
505                                 break;
506                         case S_HEX:
507                                 str = sym_get_string_value(sym);
508                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
509                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
510                                         break;
511                                 }
512                         case S_INT:
513                                 str = sym_get_string_value(sym);
514                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
515                                 break;
516                         }
517                 }
518
519         next:
520                 if (menu->list) {
521                         menu = menu->list;
522                         continue;
523                 }
524                 if (menu->next)
525                         menu = menu->next;
526                 else while ((menu = menu->parent)) {
527                         if (menu->next) {
528                                 menu = menu->next;
529                                 break;
530                         }
531                 }
532         }
533         fclose(out);
534
535         if (*tmpname) {
536                 strcat(dirname, basename);
537                 strcat(dirname, ".old");
538                 rename(newname, dirname);
539                 if (rename(tmpname, newname))
540                         return 1;
541         }
542
543         printf(_("#\n"
544                  "# configuration written to %s\n"
545                  "#\n"), newname);
546
547         sym_set_change_count(0);
548
549         return 0;
550 }
551
552 int conf_split_config(void)
553 {
554         char *name, path[128];
555         char *s, *d, c;
556         struct symbol *sym;
557         struct stat sb;
558         int res, i, fd;
559
560         name = getenv("KCONFIG_AUTOCONFIG");
561         if (!name)
562                 name = "include/config/auto.conf";
563         conf_read_simple(name, S_DEF_AUTO);
564
565         if (chdir("include/config"))
566                 return 1;
567
568         res = 0;
569         for_all_symbols(i, sym) {
570                 sym_calc_value(sym);
571                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
572                         continue;
573                 if (sym->flags & SYMBOL_WRITE) {
574                         if (sym->flags & SYMBOL_DEF_AUTO) {
575                                 /*
576                                  * symbol has old and new value,
577                                  * so compare them...
578                                  */
579                                 switch (sym->type) {
580                                 case S_BOOLEAN:
581                                 case S_TRISTATE:
582                                         if (sym_get_tristate_value(sym) ==
583                                             sym->def[S_DEF_AUTO].tri)
584                                                 continue;
585                                         break;
586                                 case S_STRING:
587                                 case S_HEX:
588                                 case S_INT:
589                                         if (!strcmp(sym_get_string_value(sym),
590                                                     sym->def[S_DEF_AUTO].val))
591                                                 continue;
592                                         break;
593                                 default:
594                                         break;
595                                 }
596                         } else {
597                                 /*
598                                  * If there is no old value, only 'no' (unset)
599                                  * is allowed as new value.
600                                  */
601                                 switch (sym->type) {
602                                 case S_BOOLEAN:
603                                 case S_TRISTATE:
604                                         if (sym_get_tristate_value(sym) == no)
605                                                 continue;
606                                         break;
607                                 default:
608                                         break;
609                                 }
610                         }
611                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
612                         /* There is neither an old nor a new value. */
613                         continue;
614                 /* else
615                  *      There is an old value, but no new value ('no' (unset)
616                  *      isn't saved in auto.conf, so the old value is always
617                  *      different from 'no').
618                  */
619
620                 /* Replace all '_' and append ".h" */
621                 s = sym->name;
622                 d = path;
623                 while ((c = *s++)) {
624                         c = tolower(c);
625                         *d++ = (c == '_') ? '/' : c;
626                 }
627                 strcpy(d, ".h");
628
629                 /* Assume directory path already exists. */
630                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
631                 if (fd == -1) {
632                         if (errno != ENOENT) {
633                                 res = 1;
634                                 break;
635                         }
636                         /*
637                          * Create directory components,
638                          * unless they exist already.
639                          */
640                         d = path;
641                         while ((d = strchr(d, '/'))) {
642                                 *d = 0;
643                                 if (stat(path, &sb) && mkdir(path, 0755)) {
644                                         res = 1;
645                                         goto out;
646                                 }
647                                 *d++ = '/';
648                         }
649                         /* Try it again. */
650                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
651                         if (fd == -1) {
652                                 res = 1;
653                                 break;
654                         }
655                 }
656                 close(fd);
657         }
658 out:
659         if (chdir("../.."))
660                 return 1;
661
662         return res;
663 }
664
665 int conf_write_autoconf(void)
666 {
667         struct symbol *sym;
668         const char *str;
669         char *name;
670         FILE *out, *out_h;
671         time_t now;
672         int i, l;
673
674         sym_clear_all_valid();
675
676         file_write_dep("include/config/auto.conf.cmd");
677
678         if (conf_split_config())
679                 return 1;
680
681         out = fopen(".tmpconfig", "w");
682         if (!out)
683                 return 1;
684
685         out_h = fopen(".tmpconfig.h", "w");
686         if (!out_h) {
687                 fclose(out);
688                 return 1;
689         }
690
691         sym = sym_lookup("KERNELVERSION", 0);
692         sym_calc_value(sym);
693         time(&now);
694         fprintf(out, "#\n"
695                      "# Automatically generated make config: don't edit\n"
696                      "# Linux kernel version: %s\n"
697                      "# %s"
698                      "#\n",
699                      sym_get_string_value(sym), ctime(&now));
700         fprintf(out_h, "/*\n"
701                        " * Automatically generated C config: don't edit\n"
702                        " * Linux kernel version: %s\n"
703                        " * %s"
704                        " */\n"
705                        "#define AUTOCONF_INCLUDED\n",
706                        sym_get_string_value(sym), ctime(&now));
707
708         for_all_symbols(i, sym) {
709                 sym_calc_value(sym);
710                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
711                         continue;
712                 switch (sym->type) {
713                 case S_BOOLEAN:
714                 case S_TRISTATE:
715                         switch (sym_get_tristate_value(sym)) {
716                         case no:
717                                 break;
718                         case mod:
719                                 fprintf(out, "CONFIG_%s=m\n", sym->name);
720                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
721                                 break;
722                         case yes:
723                                 fprintf(out, "CONFIG_%s=y\n", sym->name);
724                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
725                                 break;
726                         }
727                         break;
728                 case S_STRING:
729                         str = sym_get_string_value(sym);
730                         fprintf(out, "CONFIG_%s=\"", sym->name);
731                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
732                         while (1) {
733                                 l = strcspn(str, "\"\\");
734                                 if (l) {
735                                         fwrite(str, l, 1, out);
736                                         fwrite(str, l, 1, out_h);
737                                         str += l;
738                                 }
739                                 if (!*str)
740                                         break;
741                                 fprintf(out, "\\%c", *str);
742                                 fprintf(out_h, "\\%c", *str);
743                                 str++;
744                         }
745                         fputs("\"\n", out);
746                         fputs("\"\n", out_h);
747                         break;
748                 case S_HEX:
749                         str = sym_get_string_value(sym);
750                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
751                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
752                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
753                                 break;
754                         }
755                 case S_INT:
756                         str = sym_get_string_value(sym);
757                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
758                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
759                         break;
760                 default:
761                         break;
762                 }
763         }
764         fclose(out);
765         fclose(out_h);
766
767         name = getenv("KCONFIG_AUTOHEADER");
768         if (!name)
769                 name = "include/linux/autoconf.h";
770         if (rename(".tmpconfig.h", name))
771                 return 1;
772         name = getenv("KCONFIG_AUTOCONFIG");
773         if (!name)
774                 name = "include/config/auto.conf";
775         /*
776          * This must be the last step, kbuild has a dependency on auto.conf
777          * and this marks the successful completion of the previous steps.
778          */
779         if (rename(".tmpconfig", name))
780                 return 1;
781
782         return 0;
783 }
784
785 static int sym_change_count;
786 static void (*conf_changed_callback)(void);
787
788 void sym_set_change_count(int count)
789 {
790         int _sym_change_count = sym_change_count;
791         sym_change_count = count;
792         if (conf_changed_callback &&
793             (bool)_sym_change_count != (bool)count)
794                 conf_changed_callback();
795 }
796
797 void sym_add_change_count(int count)
798 {
799         sym_set_change_count(count + sym_change_count);
800 }
801
802 bool conf_get_changed(void)
803 {
804         return sym_change_count;
805 }
806
807 void conf_set_changed_callback(void (*fn)(void))
808 {
809         conf_changed_callback = fn;
810 }
811
812
813 void conf_set_all_new_symbols(enum conf_def_mode mode)
814 {
815         struct symbol *sym, *csym;
816         struct property *prop;
817         struct expr *e;
818         int i, cnt, def;
819
820         for_all_symbols(i, sym) {
821                 if (sym_has_value(sym))
822                         continue;
823                 switch (sym_get_type(sym)) {
824                 case S_BOOLEAN:
825                 case S_TRISTATE:
826                         switch (mode) {
827                         case def_yes:
828                                 sym->def[S_DEF_USER].tri = yes;
829                                 break;
830                         case def_mod:
831                                 sym->def[S_DEF_USER].tri = mod;
832                                 break;
833                         case def_no:
834                                 sym->def[S_DEF_USER].tri = no;
835                                 break;
836                         case def_random:
837                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % 3);
838                                 break;
839                         default:
840                                 continue;
841                         }
842                         if (!sym_is_choice(sym) || mode != def_random)
843                                 sym->flags |= SYMBOL_DEF_USER;
844                         break;
845                 default:
846                         break;
847                 }
848
849         }
850
851         if (modules_sym)
852                 sym_calc_value(modules_sym);
853
854         if (mode != def_random)
855                 return;
856
857         for_all_symbols(i, csym) {
858                 if (sym_has_value(csym) || !sym_is_choice(csym))
859                         continue;
860
861                 sym_calc_value(csym);
862                 prop = sym_get_choice_prop(csym);
863                 def = -1;
864                 while (1) {
865                         cnt = 0;
866                         expr_list_for_each_sym(prop->expr, e, sym) {
867                                 if (sym->visible == no)
868                                         continue;
869                                 if (def == cnt++) {
870                                         csym->def[S_DEF_USER].val = sym;
871                                         break;
872                                 }
873                         }
874                         if (def >= 0 || cnt < 2)
875                                 break;
876                         def = (rand() % cnt) + 1;
877                 }
878                 csym->flags |= SYMBOL_DEF_USER;
879         }
880 }