Loading...
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
4 */
5
6#include <ctype.h>
7#include <limits.h>
8#include <stdio.h>
9#include <stdlib.h>
10#include <string.h>
11#include <time.h>
12#include <unistd.h>
13#include <getopt.h>
14#include <sys/time.h>
15#include <errno.h>
16
17#include "internal.h"
18#include "lkc.h"
19
20static void conf(struct menu *menu);
21static void check_conf(struct menu *menu);
22
23enum input_mode {
24 oldaskconfig,
25 syncconfig,
26 oldconfig,
27 allnoconfig,
28 allyesconfig,
29 allmodconfig,
30 alldefconfig,
31 randconfig,
32 defconfig,
33 savedefconfig,
34 listnewconfig,
35 helpnewconfig,
36 olddefconfig,
37 yes2modconfig,
38 mod2yesconfig,
39 mod2noconfig,
40};
41static enum input_mode input_mode = oldaskconfig;
42static int input_mode_opt;
43static int indent = 1;
44static int tty_stdio;
45static int sync_kconfig;
46static int conf_cnt;
47static char line[PATH_MAX];
48static struct menu *rootEntry;
49
50static void print_help(struct menu *menu)
51{
52 struct gstr help = str_new();
53
54 menu_get_ext_help(menu, &help);
55
56 printf("\n%s\n", str_get(&help));
57 str_free(&help);
58}
59
60static void strip(char *str)
61{
62 char *p = str;
63 int l;
64
65 while ((isspace(*p)))
66 p++;
67 l = strlen(p);
68 if (p != str)
69 memmove(str, p, l + 1);
70 if (!l)
71 return;
72 p = str + l - 1;
73 while ((isspace(*p)))
74 *p-- = 0;
75}
76
77/* Helper function to facilitate fgets() by Jean Sacren. */
78static void xfgets(char *str, int size, FILE *in)
79{
80 if (!fgets(str, size, in))
81 fprintf(stderr, "\nError in reading or end of file.\n");
82
83 if (!tty_stdio)
84 printf("%s", str);
85}
86
87static void set_randconfig_seed(void)
88{
89 unsigned int seed;
90 char *env;
91 bool seed_set = false;
92
93 env = getenv("KCONFIG_SEED");
94 if (env && *env) {
95 char *endp;
96
97 seed = strtol(env, &endp, 0);
98 if (*endp == '\0')
99 seed_set = true;
100 }
101
102 if (!seed_set) {
103 struct timeval now;
104
105 /*
106 * Use microseconds derived seed, compensate for systems where it may
107 * be zero.
108 */
109 gettimeofday(&now, NULL);
110 seed = (now.tv_sec + 1) * (now.tv_usec + 1);
111 }
112
113 printf("KCONFIG_SEED=0x%X\n", seed);
114 srand(seed);
115}
116
117static bool randomize_choice_values(struct symbol *csym)
118{
119 struct property *prop;
120 struct symbol *sym;
121 struct expr *e;
122 int cnt, def;
123
124 /*
125 * If choice is mod then we may have more items selected
126 * and if no then no-one.
127 * In both cases stop.
128 */
129 if (csym->curr.tri != yes)
130 return false;
131
132 prop = sym_get_choice_prop(csym);
133
134 /* count entries in choice block */
135 cnt = 0;
136 expr_list_for_each_sym(prop->expr, e, sym)
137 cnt++;
138
139 /*
140 * find a random value and set it to yes,
141 * set the rest to no so we have only one set
142 */
143 def = rand() % cnt;
144
145 cnt = 0;
146 expr_list_for_each_sym(prop->expr, e, sym) {
147 if (def == cnt++) {
148 sym->def[S_DEF_USER].tri = yes;
149 csym->def[S_DEF_USER].val = sym;
150 } else {
151 sym->def[S_DEF_USER].tri = no;
152 }
153 sym->flags |= SYMBOL_DEF_USER;
154 /* clear VALID to get value calculated */
155 sym->flags &= ~SYMBOL_VALID;
156 }
157 csym->flags |= SYMBOL_DEF_USER;
158 /* clear VALID to get value calculated */
159 csym->flags &= ~SYMBOL_VALID;
160
161 return true;
162}
163
164enum conf_def_mode {
165 def_default,
166 def_yes,
167 def_mod,
168 def_no,
169 def_random
170};
171
172static bool conf_set_all_new_symbols(enum conf_def_mode mode)
173{
174 struct symbol *sym, *csym;
175 int cnt;
176 /*
177 * can't go as the default in switch-case below, otherwise gcc whines
178 * about -Wmaybe-uninitialized
179 */
180 int pby = 50; /* probability of bool = y */
181 int pty = 33; /* probability of tristate = y */
182 int ptm = 33; /* probability of tristate = m */
183 bool has_changed = false;
184
185 if (mode == def_random) {
186 int n, p[3];
187 char *env = getenv("KCONFIG_PROBABILITY");
188
189 n = 0;
190 while (env && *env) {
191 char *endp;
192 int tmp = strtol(env, &endp, 10);
193
194 if (tmp >= 0 && tmp <= 100) {
195 p[n++] = tmp;
196 } else {
197 errno = ERANGE;
198 perror("KCONFIG_PROBABILITY");
199 exit(1);
200 }
201 env = (*endp == ':') ? endp + 1 : endp;
202 if (n >= 3)
203 break;
204 }
205 switch (n) {
206 case 1:
207 pby = p[0];
208 ptm = pby / 2;
209 pty = pby - ptm;
210 break;
211 case 2:
212 pty = p[0];
213 ptm = p[1];
214 pby = pty + ptm;
215 break;
216 case 3:
217 pby = p[0];
218 pty = p[1];
219 ptm = p[2];
220 break;
221 }
222
223 if (pty + ptm > 100) {
224 errno = ERANGE;
225 perror("KCONFIG_PROBABILITY");
226 exit(1);
227 }
228 }
229
230 for_all_symbols(sym) {
231 if (sym_has_value(sym) || sym->flags & SYMBOL_VALID)
232 continue;
233 switch (sym_get_type(sym)) {
234 case S_BOOLEAN:
235 case S_TRISTATE:
236 has_changed = true;
237 switch (mode) {
238 case def_yes:
239 sym->def[S_DEF_USER].tri = yes;
240 break;
241 case def_mod:
242 sym->def[S_DEF_USER].tri = mod;
243 break;
244 case def_no:
245 sym->def[S_DEF_USER].tri = no;
246 break;
247 case def_random:
248 sym->def[S_DEF_USER].tri = no;
249 cnt = rand() % 100;
250 if (sym->type == S_TRISTATE) {
251 if (cnt < pty)
252 sym->def[S_DEF_USER].tri = yes;
253 else if (cnt < pty + ptm)
254 sym->def[S_DEF_USER].tri = mod;
255 } else if (cnt < pby)
256 sym->def[S_DEF_USER].tri = yes;
257 break;
258 default:
259 continue;
260 }
261 if (!(sym_is_choice(sym) && mode == def_random))
262 sym->flags |= SYMBOL_DEF_USER;
263 break;
264 default:
265 break;
266 }
267
268 }
269
270 sym_clear_all_valid();
271
272 /*
273 * We have different type of choice blocks.
274 * If curr.tri equals to mod then we can select several
275 * choice symbols in one block.
276 * In this case we do nothing.
277 * If curr.tri equals yes then only one symbol can be
278 * selected in a choice block and we set it to yes,
279 * and the rest to no.
280 */
281 if (mode != def_random) {
282 for_all_symbols(csym) {
283 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
284 sym_is_choice_value(csym))
285 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
286 }
287 }
288
289 for_all_symbols(csym) {
290 if (sym_has_value(csym) || !sym_is_choice(csym))
291 continue;
292
293 sym_calc_value(csym);
294 if (mode == def_random)
295 has_changed |= randomize_choice_values(csym);
296 else {
297 set_all_choice_values(csym);
298 has_changed = true;
299 }
300 }
301
302 return has_changed;
303}
304
305static void conf_rewrite_tristates(tristate old_val, tristate new_val)
306{
307 struct symbol *sym;
308
309 for_all_symbols(sym) {
310 if (sym_get_type(sym) == S_TRISTATE &&
311 sym->def[S_DEF_USER].tri == old_val)
312 sym->def[S_DEF_USER].tri = new_val;
313 }
314 sym_clear_all_valid();
315}
316
317static int conf_askvalue(struct symbol *sym, const char *def)
318{
319 if (!sym_has_value(sym))
320 printf("(NEW) ");
321
322 line[0] = '\n';
323 line[1] = 0;
324
325 if (!sym_is_changeable(sym)) {
326 printf("%s\n", def);
327 line[0] = '\n';
328 line[1] = 0;
329 return 0;
330 }
331
332 switch (input_mode) {
333 case oldconfig:
334 case syncconfig:
335 if (sym_has_value(sym)) {
336 printf("%s\n", def);
337 return 0;
338 }
339 /* fall through */
340 default:
341 fflush(stdout);
342 xfgets(line, sizeof(line), stdin);
343 break;
344 }
345
346 return 1;
347}
348
349static int conf_string(struct menu *menu)
350{
351 struct symbol *sym = menu->sym;
352 const char *def;
353
354 while (1) {
355 printf("%*s%s ", indent - 1, "", menu->prompt->text);
356 printf("(%s) ", sym->name);
357 def = sym_get_string_value(sym);
358 if (def)
359 printf("[%s] ", def);
360 if (!conf_askvalue(sym, def))
361 return 0;
362 switch (line[0]) {
363 case '\n':
364 break;
365 case '?':
366 /* print help */
367 if (line[1] == '\n') {
368 print_help(menu);
369 def = NULL;
370 break;
371 }
372 /* fall through */
373 default:
374 line[strlen(line)-1] = 0;
375 def = line;
376 }
377 if (def && sym_set_string_value(sym, def))
378 return 0;
379 }
380}
381
382static int conf_sym(struct menu *menu)
383{
384 struct symbol *sym = menu->sym;
385 tristate oldval, newval;
386
387 while (1) {
388 printf("%*s%s ", indent - 1, "", menu->prompt->text);
389 if (sym->name)
390 printf("(%s) ", sym->name);
391 putchar('[');
392 oldval = sym_get_tristate_value(sym);
393 switch (oldval) {
394 case no:
395 putchar('N');
396 break;
397 case mod:
398 putchar('M');
399 break;
400 case yes:
401 putchar('Y');
402 break;
403 }
404 if (oldval != no && sym_tristate_within_range(sym, no))
405 printf("/n");
406 if (oldval != mod && sym_tristate_within_range(sym, mod))
407 printf("/m");
408 if (oldval != yes && sym_tristate_within_range(sym, yes))
409 printf("/y");
410 printf("/?] ");
411 if (!conf_askvalue(sym, sym_get_string_value(sym)))
412 return 0;
413 strip(line);
414
415 switch (line[0]) {
416 case 'n':
417 case 'N':
418 newval = no;
419 if (!line[1] || !strcmp(&line[1], "o"))
420 break;
421 continue;
422 case 'm':
423 case 'M':
424 newval = mod;
425 if (!line[1])
426 break;
427 continue;
428 case 'y':
429 case 'Y':
430 newval = yes;
431 if (!line[1] || !strcmp(&line[1], "es"))
432 break;
433 continue;
434 case 0:
435 newval = oldval;
436 break;
437 case '?':
438 goto help;
439 default:
440 continue;
441 }
442 if (sym_set_tristate_value(sym, newval))
443 return 0;
444help:
445 print_help(menu);
446 }
447}
448
449static int conf_choice(struct menu *menu)
450{
451 struct symbol *sym, *def_sym;
452 struct menu *child;
453 bool is_new;
454
455 sym = menu->sym;
456 is_new = !sym_has_value(sym);
457 if (sym_is_changeable(sym)) {
458 conf_sym(menu);
459 sym_calc_value(sym);
460 switch (sym_get_tristate_value(sym)) {
461 case no:
462 return 1;
463 case mod:
464 return 0;
465 case yes:
466 break;
467 }
468 } else {
469 switch (sym_get_tristate_value(sym)) {
470 case no:
471 return 1;
472 case mod:
473 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
474 return 0;
475 case yes:
476 break;
477 }
478 }
479
480 while (1) {
481 int cnt, def;
482
483 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
484 def_sym = sym_get_choice_value(sym);
485 cnt = def = 0;
486 line[0] = 0;
487 for (child = menu->list; child; child = child->next) {
488 if (!menu_is_visible(child))
489 continue;
490 if (!child->sym) {
491 printf("%*c %s\n", indent, '*', menu_get_prompt(child));
492 continue;
493 }
494 cnt++;
495 if (child->sym == def_sym) {
496 def = cnt;
497 printf("%*c", indent, '>');
498 } else
499 printf("%*c", indent, ' ');
500 printf(" %d. %s", cnt, menu_get_prompt(child));
501 if (child->sym->name)
502 printf(" (%s)", child->sym->name);
503 if (!sym_has_value(child->sym))
504 printf(" (NEW)");
505 printf("\n");
506 }
507 printf("%*schoice", indent - 1, "");
508 if (cnt == 1) {
509 printf("[1]: 1\n");
510 goto conf_childs;
511 }
512 printf("[1-%d?]: ", cnt);
513 switch (input_mode) {
514 case oldconfig:
515 case syncconfig:
516 if (!is_new) {
517 cnt = def;
518 printf("%d\n", cnt);
519 break;
520 }
521 /* fall through */
522 case oldaskconfig:
523 fflush(stdout);
524 xfgets(line, sizeof(line), stdin);
525 strip(line);
526 if (line[0] == '?') {
527 print_help(menu);
528 continue;
529 }
530 if (!line[0])
531 cnt = def;
532 else if (isdigit(line[0]))
533 cnt = atoi(line);
534 else
535 continue;
536 break;
537 default:
538 break;
539 }
540
541 conf_childs:
542 for (child = menu->list; child; child = child->next) {
543 if (!child->sym || !menu_is_visible(child))
544 continue;
545 if (!--cnt)
546 break;
547 }
548 if (!child)
549 continue;
550 if (line[0] && line[strlen(line) - 1] == '?') {
551 print_help(child);
552 continue;
553 }
554 sym_set_tristate_value(child->sym, yes);
555 return 1;
556 }
557}
558
559static void conf(struct menu *menu)
560{
561 struct symbol *sym;
562 struct property *prop;
563 struct menu *child;
564
565 if (!menu_is_visible(menu))
566 return;
567
568 sym = menu->sym;
569 prop = menu->prompt;
570 if (prop) {
571 const char *prompt;
572
573 switch (prop->type) {
574 case P_MENU:
575 /*
576 * Except in oldaskconfig mode, we show only menus that
577 * contain new symbols.
578 */
579 if (input_mode != oldaskconfig && rootEntry != menu) {
580 check_conf(menu);
581 return;
582 }
583 /* fall through */
584 case P_COMMENT:
585 prompt = menu_get_prompt(menu);
586 if (prompt)
587 printf("%*c\n%*c %s\n%*c\n",
588 indent, '*',
589 indent, '*', prompt,
590 indent, '*');
591 default:
592 ;
593 }
594 }
595
596 if (!sym)
597 goto conf_childs;
598
599 if (sym_is_choice(sym)) {
600 conf_choice(menu);
601 if (sym->curr.tri != mod)
602 return;
603 goto conf_childs;
604 }
605
606 switch (sym->type) {
607 case S_INT:
608 case S_HEX:
609 case S_STRING:
610 conf_string(menu);
611 break;
612 default:
613 conf_sym(menu);
614 break;
615 }
616
617conf_childs:
618 if (sym)
619 indent += 2;
620 for (child = menu->list; child; child = child->next)
621 conf(child);
622 if (sym)
623 indent -= 2;
624}
625
626static void check_conf(struct menu *menu)
627{
628 struct symbol *sym;
629 struct menu *child;
630
631 if (!menu_is_visible(menu))
632 return;
633
634 sym = menu->sym;
635 if (sym && !sym_has_value(sym) &&
636 (sym_is_changeable(sym) ||
637 (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes))) {
638
639 switch (input_mode) {
640 case listnewconfig:
641 if (sym->name)
642 print_symbol_for_listconfig(sym);
643 break;
644 case helpnewconfig:
645 printf("-----\n");
646 print_help(menu);
647 printf("-----\n");
648 break;
649 default:
650 if (!conf_cnt++)
651 printf("*\n* Restart config...\n*\n");
652 rootEntry = menu_get_parent_menu(menu);
653 conf(rootEntry);
654 break;
655 }
656 }
657
658 for (child = menu->list; child; child = child->next)
659 check_conf(child);
660}
661
662static const struct option long_opts[] = {
663 {"help", no_argument, NULL, 'h'},
664 {"silent", no_argument, NULL, 's'},
665 {"oldaskconfig", no_argument, &input_mode_opt, oldaskconfig},
666 {"oldconfig", no_argument, &input_mode_opt, oldconfig},
667 {"syncconfig", no_argument, &input_mode_opt, syncconfig},
668 {"defconfig", required_argument, &input_mode_opt, defconfig},
669 {"savedefconfig", required_argument, &input_mode_opt, savedefconfig},
670 {"allnoconfig", no_argument, &input_mode_opt, allnoconfig},
671 {"allyesconfig", no_argument, &input_mode_opt, allyesconfig},
672 {"allmodconfig", no_argument, &input_mode_opt, allmodconfig},
673 {"alldefconfig", no_argument, &input_mode_opt, alldefconfig},
674 {"randconfig", no_argument, &input_mode_opt, randconfig},
675 {"listnewconfig", no_argument, &input_mode_opt, listnewconfig},
676 {"helpnewconfig", no_argument, &input_mode_opt, helpnewconfig},
677 {"olddefconfig", no_argument, &input_mode_opt, olddefconfig},
678 {"yes2modconfig", no_argument, &input_mode_opt, yes2modconfig},
679 {"mod2yesconfig", no_argument, &input_mode_opt, mod2yesconfig},
680 {"mod2noconfig", no_argument, &input_mode_opt, mod2noconfig},
681 {NULL, 0, NULL, 0}
682};
683
684static void conf_usage(const char *progname)
685{
686 printf("Usage: %s [options] <kconfig-file>\n", progname);
687 printf("\n");
688 printf("Generic options:\n");
689 printf(" -h, --help Print this message and exit.\n");
690 printf(" -s, --silent Do not print log.\n");
691 printf("\n");
692 printf("Mode options:\n");
693 printf(" --listnewconfig List new options\n");
694 printf(" --helpnewconfig List new options and help text\n");
695 printf(" --oldaskconfig Start a new configuration using a line-oriented program\n");
696 printf(" --oldconfig Update a configuration using a provided .config as base\n");
697 printf(" --syncconfig Similar to oldconfig but generates configuration in\n"
698 " include/{generated/,config/}\n");
699 printf(" --olddefconfig Same as oldconfig but sets new symbols to their default value\n");
700 printf(" --defconfig <file> New config with default defined in <file>\n");
701 printf(" --savedefconfig <file> Save the minimal current configuration to <file>\n");
702 printf(" --allnoconfig New config where all options are answered with no\n");
703 printf(" --allyesconfig New config where all options are answered with yes\n");
704 printf(" --allmodconfig New config where all options are answered with mod\n");
705 printf(" --alldefconfig New config with all symbols set to default\n");
706 printf(" --randconfig New config with random answer to all options\n");
707 printf(" --yes2modconfig Change answers from yes to mod if possible\n");
708 printf(" --mod2yesconfig Change answers from mod to yes if possible\n");
709 printf(" --mod2noconfig Change answers from mod to no if possible\n");
710 printf(" (If none of the above is given, --oldaskconfig is the default)\n");
711}
712
713int main(int ac, char **av)
714{
715 const char *progname = av[0];
716 int opt;
717 const char *name, *defconfig_file = NULL /* gcc uninit */;
718 int no_conf_write = 0;
719
720 tty_stdio = isatty(0) && isatty(1);
721
722 while ((opt = getopt_long(ac, av, "hs", long_opts, NULL)) != -1) {
723 switch (opt) {
724 case 'h':
725 conf_usage(progname);
726 exit(1);
727 break;
728 case 's':
729 conf_set_message_callback(NULL);
730 break;
731 case 0:
732 input_mode = input_mode_opt;
733 switch (input_mode) {
734 case syncconfig:
735 /*
736 * syncconfig is invoked during the build stage.
737 * Suppress distracting
738 * "configuration written to ..."
739 */
740 conf_set_message_callback(NULL);
741 sync_kconfig = 1;
742 break;
743 case defconfig:
744 case savedefconfig:
745 defconfig_file = optarg;
746 break;
747 case randconfig:
748 set_randconfig_seed();
749 break;
750 default:
751 break;
752 }
753 default:
754 break;
755 }
756 }
757 if (ac == optind) {
758 fprintf(stderr, "%s: Kconfig file missing\n", av[0]);
759 conf_usage(progname);
760 exit(1);
761 }
762 conf_parse(av[optind]);
763 //zconfdump(stdout);
764
765 switch (input_mode) {
766 case defconfig:
767 if (conf_read(defconfig_file)) {
768 fprintf(stderr,
769 "***\n"
770 "*** Can't find default configuration \"%s\"!\n"
771 "***\n",
772 defconfig_file);
773 exit(1);
774 }
775 break;
776 case savedefconfig:
777 case syncconfig:
778 case oldaskconfig:
779 case oldconfig:
780 case listnewconfig:
781 case helpnewconfig:
782 case olddefconfig:
783 case yes2modconfig:
784 case mod2yesconfig:
785 case mod2noconfig:
786 conf_read(NULL);
787 break;
788 case allnoconfig:
789 case allyesconfig:
790 case allmodconfig:
791 case alldefconfig:
792 case randconfig:
793 name = getenv("KCONFIG_ALLCONFIG");
794 if (!name)
795 break;
796 if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) {
797 if (conf_read_simple(name, S_DEF_USER)) {
798 fprintf(stderr,
799 "*** Can't read seed configuration \"%s\"!\n",
800 name);
801 exit(1);
802 }
803 break;
804 }
805 switch (input_mode) {
806 case allnoconfig: name = "allno.config"; break;
807 case allyesconfig: name = "allyes.config"; break;
808 case allmodconfig: name = "allmod.config"; break;
809 case alldefconfig: name = "alldef.config"; break;
810 case randconfig: name = "allrandom.config"; break;
811 default: break;
812 }
813 if (conf_read_simple(name, S_DEF_USER) &&
814 conf_read_simple("all.config", S_DEF_USER)) {
815 fprintf(stderr,
816 "*** KCONFIG_ALLCONFIG set, but no \"%s\" or \"all.config\" file found\n",
817 name);
818 exit(1);
819 }
820 break;
821 default:
822 break;
823 }
824
825 if (conf_errors())
826 exit(1);
827
828 if (sync_kconfig) {
829 name = getenv("KCONFIG_NOSILENTUPDATE");
830 if (name && *name) {
831 if (conf_get_changed()) {
832 fprintf(stderr,
833 "\n*** The configuration requires explicit update.\n\n");
834 return 1;
835 }
836 no_conf_write = 1;
837 }
838 }
839
840 switch (input_mode) {
841 case allnoconfig:
842 conf_set_all_new_symbols(def_no);
843 break;
844 case allyesconfig:
845 conf_set_all_new_symbols(def_yes);
846 break;
847 case allmodconfig:
848 conf_set_all_new_symbols(def_mod);
849 break;
850 case alldefconfig:
851 conf_set_all_new_symbols(def_default);
852 break;
853 case randconfig:
854 /* Really nothing to do in this loop */
855 while (conf_set_all_new_symbols(def_random)) ;
856 break;
857 case defconfig:
858 conf_set_all_new_symbols(def_default);
859 break;
860 case savedefconfig:
861 break;
862 case yes2modconfig:
863 conf_rewrite_tristates(yes, mod);
864 break;
865 case mod2yesconfig:
866 conf_rewrite_tristates(mod, yes);
867 break;
868 case mod2noconfig:
869 conf_rewrite_tristates(mod, no);
870 break;
871 case oldaskconfig:
872 rootEntry = &rootmenu;
873 conf(&rootmenu);
874 input_mode = oldconfig;
875 /* fall through */
876 case oldconfig:
877 case listnewconfig:
878 case helpnewconfig:
879 case syncconfig:
880 /* Update until a loop caused no more changes */
881 do {
882 conf_cnt = 0;
883 check_conf(&rootmenu);
884 } while (conf_cnt);
885 break;
886 case olddefconfig:
887 default:
888 break;
889 }
890
891 if (sym_dep_errors())
892 exit(1);
893
894 if (input_mode == savedefconfig) {
895 if (conf_write_defconfig(defconfig_file)) {
896 fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n",
897 defconfig_file);
898 return 1;
899 }
900 } else if (input_mode != listnewconfig && input_mode != helpnewconfig) {
901 if (!no_conf_write && conf_write(NULL)) {
902 fprintf(stderr, "\n*** Error during writing of the configuration.\n\n");
903 exit(1);
904 }
905
906 /*
907 * Create auto.conf if it does not exist.
908 * This prevents GNU Make 4.1 or older from emitting
909 * "include/config/auto.conf: No such file or directory"
910 * in the top-level Makefile
911 *
912 * syncconfig always creates or updates auto.conf because it is
913 * used during the build.
914 */
915 if (conf_write_autoconf(sync_kconfig) && sync_kconfig) {
916 fprintf(stderr,
917 "\n*** Error during sync of the configuration.\n\n");
918 return 1;
919 }
920 }
921 return 0;
922}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
4 */
5
6#include <ctype.h>
7#include <limits.h>
8#include <stdio.h>
9#include <stdlib.h>
10#include <string.h>
11#include <time.h>
12#include <unistd.h>
13#include <getopt.h>
14#include <sys/time.h>
15#include <errno.h>
16
17#include "internal.h"
18#include "lkc.h"
19
20static void conf(struct menu *menu);
21static void check_conf(struct menu *menu);
22
23enum input_mode {
24 oldaskconfig,
25 syncconfig,
26 oldconfig,
27 allnoconfig,
28 allyesconfig,
29 allmodconfig,
30 alldefconfig,
31 randconfig,
32 defconfig,
33 savedefconfig,
34 listnewconfig,
35 helpnewconfig,
36 olddefconfig,
37 yes2modconfig,
38 mod2yesconfig,
39 mod2noconfig,
40};
41static enum input_mode input_mode = oldaskconfig;
42static int input_mode_opt;
43static int indent = 1;
44static int tty_stdio;
45static int sync_kconfig;
46static int conf_cnt;
47static char line[PATH_MAX];
48static struct menu *rootEntry;
49
50static void print_help(struct menu *menu)
51{
52 struct gstr help = str_new();
53
54 menu_get_ext_help(menu, &help);
55
56 printf("\n%s\n", str_get(&help));
57 str_free(&help);
58}
59
60static void strip(char *str)
61{
62 char *p = str;
63 int l;
64
65 while ((isspace(*p)))
66 p++;
67 l = strlen(p);
68 if (p != str)
69 memmove(str, p, l + 1);
70 if (!l)
71 return;
72 p = str + l - 1;
73 while ((isspace(*p)))
74 *p-- = 0;
75}
76
77/* Helper function to facilitate fgets() by Jean Sacren. */
78static void xfgets(char *str, int size, FILE *in)
79{
80 if (!fgets(str, size, in))
81 fprintf(stderr, "\nError in reading or end of file.\n");
82
83 if (!tty_stdio)
84 printf("%s", str);
85}
86
87static void set_randconfig_seed(void)
88{
89 unsigned int seed;
90 char *env;
91 bool seed_set = false;
92
93 env = getenv("KCONFIG_SEED");
94 if (env && *env) {
95 char *endp;
96
97 seed = strtol(env, &endp, 0);
98 if (*endp == '\0')
99 seed_set = true;
100 }
101
102 if (!seed_set) {
103 struct timeval now;
104
105 /*
106 * Use microseconds derived seed, compensate for systems where it may
107 * be zero.
108 */
109 gettimeofday(&now, NULL);
110 seed = (now.tv_sec + 1) * (now.tv_usec + 1);
111 }
112
113 printf("KCONFIG_SEED=0x%X\n", seed);
114 srand(seed);
115}
116
117/**
118 * randomize_choice_values - randomize choice block
119 *
120 * @choice: menu entry for the choice
121 */
122static void randomize_choice_values(struct menu *choice)
123{
124 struct menu *menu;
125 int x;
126 int cnt = 0;
127
128 /*
129 * First, count the number of symbols to randomize. If sym_has_value()
130 * is true, it was specified by KCONFIG_ALLCONFIG. It needs to be
131 * respected.
132 */
133 menu_for_each_sub_entry(menu, choice) {
134 struct symbol *sym = menu->sym;
135
136 if (sym && !sym_has_value(sym))
137 cnt++;
138 }
139
140 while (cnt > 0) {
141 x = rand() % cnt;
142
143 menu_for_each_sub_entry(menu, choice) {
144 struct symbol *sym = menu->sym;
145
146 if (sym && !sym_has_value(sym))
147 x--;
148
149 if (x < 0) {
150 sym->def[S_DEF_USER].tri = yes;
151 sym->flags |= SYMBOL_DEF_USER;
152 /*
153 * Move the selected item to the _tail_ because
154 * this needs to have a lower priority than the
155 * user input from KCONFIG_ALLCONFIG.
156 */
157 list_move_tail(&sym->choice_link,
158 &choice->choice_members);
159
160 break;
161 }
162 }
163 cnt--;
164 }
165}
166
167enum conf_def_mode {
168 def_default,
169 def_yes,
170 def_mod,
171 def_no,
172 def_random
173};
174
175static void conf_set_all_new_symbols(enum conf_def_mode mode)
176{
177 struct menu *menu;
178 int cnt;
179 /*
180 * can't go as the default in switch-case below, otherwise gcc whines
181 * about -Wmaybe-uninitialized
182 */
183 int pby = 50; /* probability of bool = y */
184 int pty = 33; /* probability of tristate = y */
185 int ptm = 33; /* probability of tristate = m */
186
187 if (mode == def_random) {
188 int n, p[3];
189 char *env = getenv("KCONFIG_PROBABILITY");
190
191 n = 0;
192 while (env && *env) {
193 char *endp;
194 int tmp = strtol(env, &endp, 10);
195
196 if (tmp >= 0 && tmp <= 100) {
197 p[n++] = tmp;
198 } else {
199 errno = ERANGE;
200 perror("KCONFIG_PROBABILITY");
201 exit(1);
202 }
203 env = (*endp == ':') ? endp + 1 : endp;
204 if (n >= 3)
205 break;
206 }
207 switch (n) {
208 case 1:
209 pby = p[0];
210 ptm = pby / 2;
211 pty = pby - ptm;
212 break;
213 case 2:
214 pty = p[0];
215 ptm = p[1];
216 pby = pty + ptm;
217 break;
218 case 3:
219 pby = p[0];
220 pty = p[1];
221 ptm = p[2];
222 break;
223 }
224
225 if (pty + ptm > 100) {
226 errno = ERANGE;
227 perror("KCONFIG_PROBABILITY");
228 exit(1);
229 }
230 }
231
232 menu_for_each_entry(menu) {
233 struct symbol *sym = menu->sym;
234 tristate val;
235
236 if (!sym || !menu->prompt || sym_has_value(sym) ||
237 (sym->type != S_BOOLEAN && sym->type != S_TRISTATE) ||
238 sym_is_choice_value(sym))
239 continue;
240
241 if (sym_is_choice(sym)) {
242 if (mode == def_random)
243 randomize_choice_values(menu);
244 continue;
245 }
246
247 switch (mode) {
248 case def_yes:
249 val = yes;
250 break;
251 case def_mod:
252 val = mod;
253 break;
254 case def_no:
255 val = no;
256 break;
257 case def_random:
258 val = no;
259 cnt = rand() % 100;
260 if (sym->type == S_TRISTATE) {
261 if (cnt < pty)
262 val = yes;
263 else if (cnt < pty + ptm)
264 val = mod;
265 } else if (cnt < pby) {
266 val = yes;
267 }
268 break;
269 default:
270 continue;
271 }
272 sym->def[S_DEF_USER].tri = val;
273 sym->flags |= SYMBOL_DEF_USER;
274 }
275
276 sym_clear_all_valid();
277}
278
279static void conf_rewrite_tristates(tristate old_val, tristate new_val)
280{
281 struct symbol *sym;
282
283 for_all_symbols(sym) {
284 if (sym_get_type(sym) == S_TRISTATE &&
285 sym->def[S_DEF_USER].tri == old_val)
286 sym->def[S_DEF_USER].tri = new_val;
287 }
288 sym_clear_all_valid();
289}
290
291static int conf_askvalue(struct symbol *sym, const char *def)
292{
293 if (!sym_has_value(sym))
294 printf("(NEW) ");
295
296 line[0] = '\n';
297 line[1] = 0;
298
299 if (!sym_is_changeable(sym)) {
300 printf("%s\n", def);
301 line[0] = '\n';
302 line[1] = 0;
303 return 0;
304 }
305
306 switch (input_mode) {
307 case oldconfig:
308 case syncconfig:
309 if (sym_has_value(sym)) {
310 printf("%s\n", def);
311 return 0;
312 }
313 /* fall through */
314 default:
315 fflush(stdout);
316 xfgets(line, sizeof(line), stdin);
317 break;
318 }
319
320 return 1;
321}
322
323static int conf_string(struct menu *menu)
324{
325 struct symbol *sym = menu->sym;
326 const char *def;
327
328 while (1) {
329 printf("%*s%s ", indent - 1, "", menu->prompt->text);
330 printf("(%s) ", sym->name);
331 def = sym_get_string_value(sym);
332 if (def)
333 printf("[%s] ", def);
334 if (!conf_askvalue(sym, def))
335 return 0;
336 switch (line[0]) {
337 case '\n':
338 break;
339 case '?':
340 /* print help */
341 if (line[1] == '\n') {
342 print_help(menu);
343 def = NULL;
344 break;
345 }
346 /* fall through */
347 default:
348 line[strlen(line)-1] = 0;
349 def = line;
350 }
351 if (def && sym_set_string_value(sym, def))
352 return 0;
353 }
354}
355
356static int conf_sym(struct menu *menu)
357{
358 struct symbol *sym = menu->sym;
359 tristate oldval, newval;
360
361 while (1) {
362 printf("%*s%s ", indent - 1, "", menu->prompt->text);
363 if (sym->name)
364 printf("(%s) ", sym->name);
365 putchar('[');
366 oldval = sym_get_tristate_value(sym);
367 switch (oldval) {
368 case no:
369 putchar('N');
370 break;
371 case mod:
372 putchar('M');
373 break;
374 case yes:
375 putchar('Y');
376 break;
377 }
378 if (oldval != no && sym_tristate_within_range(sym, no))
379 printf("/n");
380 if (oldval != mod && sym_tristate_within_range(sym, mod))
381 printf("/m");
382 if (oldval != yes && sym_tristate_within_range(sym, yes))
383 printf("/y");
384 printf("/?] ");
385 if (!conf_askvalue(sym, sym_get_string_value(sym)))
386 return 0;
387 strip(line);
388
389 switch (line[0]) {
390 case 'n':
391 case 'N':
392 newval = no;
393 if (!line[1] || !strcmp(&line[1], "o"))
394 break;
395 continue;
396 case 'm':
397 case 'M':
398 newval = mod;
399 if (!line[1])
400 break;
401 continue;
402 case 'y':
403 case 'Y':
404 newval = yes;
405 if (!line[1] || !strcmp(&line[1], "es"))
406 break;
407 continue;
408 case 0:
409 newval = oldval;
410 break;
411 case '?':
412 goto help;
413 default:
414 continue;
415 }
416 if (sym_set_tristate_value(sym, newval))
417 return 0;
418help:
419 print_help(menu);
420 }
421}
422
423static void conf_choice(struct menu *menu)
424{
425 struct symbol *def_sym;
426 struct menu *child;
427 bool is_new = false;
428
429 while (1) {
430 int cnt, def;
431
432 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
433 def_sym = sym_calc_choice(menu);
434 cnt = def = 0;
435 line[0] = 0;
436 for (child = menu->list; child; child = child->next) {
437 if (!menu_is_visible(child))
438 continue;
439 if (!child->sym) {
440 printf("%*c %s\n", indent, '*', menu_get_prompt(child));
441 continue;
442 }
443 cnt++;
444 if (child->sym == def_sym) {
445 def = cnt;
446 printf("%*c", indent, '>');
447 } else
448 printf("%*c", indent, ' ');
449 printf(" %d. %s (%s)", cnt, menu_get_prompt(child),
450 child->sym->name);
451 if (!sym_has_value(child->sym)) {
452 is_new = true;
453 printf(" (NEW)");
454 }
455 printf("\n");
456 }
457 printf("%*schoice", indent - 1, "");
458 if (cnt == 1) {
459 printf("[1]: 1\n");
460 goto conf_childs;
461 }
462 printf("[1-%d?]: ", cnt);
463 switch (input_mode) {
464 case oldconfig:
465 case syncconfig:
466 if (!is_new) {
467 cnt = def;
468 printf("%d\n", cnt);
469 break;
470 }
471 /* fall through */
472 case oldaskconfig:
473 fflush(stdout);
474 xfgets(line, sizeof(line), stdin);
475 strip(line);
476 if (line[0] == '?') {
477 print_help(menu);
478 continue;
479 }
480 if (!line[0])
481 cnt = def;
482 else if (isdigit(line[0]))
483 cnt = atoi(line);
484 else
485 continue;
486 break;
487 default:
488 break;
489 }
490
491 conf_childs:
492 for (child = menu->list; child; child = child->next) {
493 if (!child->sym || !menu_is_visible(child))
494 continue;
495 if (!--cnt)
496 break;
497 }
498 if (!child)
499 continue;
500 if (line[0] && line[strlen(line) - 1] == '?') {
501 print_help(child);
502 continue;
503 }
504 choice_set_value(menu, child->sym);
505 return;
506 }
507}
508
509static void conf(struct menu *menu)
510{
511 struct symbol *sym;
512 struct property *prop;
513 struct menu *child;
514
515 if (!menu_is_visible(menu))
516 return;
517
518 sym = menu->sym;
519 prop = menu->prompt;
520 if (prop) {
521 const char *prompt;
522
523 switch (prop->type) {
524 case P_MENU:
525 /*
526 * Except in oldaskconfig mode, we show only menus that
527 * contain new symbols.
528 */
529 if (input_mode != oldaskconfig && rootEntry != menu) {
530 check_conf(menu);
531 return;
532 }
533 /* fall through */
534 case P_COMMENT:
535 prompt = menu_get_prompt(menu);
536 if (prompt)
537 printf("%*c\n%*c %s\n%*c\n",
538 indent, '*',
539 indent, '*', prompt,
540 indent, '*');
541 default:
542 ;
543 }
544 }
545
546 if (!sym)
547 goto conf_childs;
548
549 if (sym_is_choice(sym)) {
550 conf_choice(menu);
551 return;
552 }
553
554 switch (sym->type) {
555 case S_INT:
556 case S_HEX:
557 case S_STRING:
558 conf_string(menu);
559 break;
560 default:
561 conf_sym(menu);
562 break;
563 }
564
565conf_childs:
566 if (sym)
567 indent += 2;
568 for (child = menu->list; child; child = child->next)
569 conf(child);
570 if (sym)
571 indent -= 2;
572}
573
574static void check_conf(struct menu *menu)
575{
576 struct symbol *sym;
577 struct menu *child;
578
579 if (!menu_is_visible(menu))
580 return;
581
582 sym = menu->sym;
583 if (sym && !sym_has_value(sym) && sym_is_changeable(sym)) {
584 switch (input_mode) {
585 case listnewconfig:
586 if (sym->name)
587 print_symbol_for_listconfig(sym);
588 break;
589 case helpnewconfig:
590 printf("-----\n");
591 print_help(menu);
592 printf("-----\n");
593 break;
594 default:
595 if (!conf_cnt++)
596 printf("*\n* Restart config...\n*\n");
597 rootEntry = menu_get_parent_menu(menu);
598 conf(rootEntry);
599 break;
600 }
601 }
602
603 for (child = menu->list; child; child = child->next)
604 check_conf(child);
605}
606
607static const struct option long_opts[] = {
608 {"help", no_argument, NULL, 'h'},
609 {"silent", no_argument, NULL, 's'},
610 {"oldaskconfig", no_argument, &input_mode_opt, oldaskconfig},
611 {"oldconfig", no_argument, &input_mode_opt, oldconfig},
612 {"syncconfig", no_argument, &input_mode_opt, syncconfig},
613 {"defconfig", required_argument, &input_mode_opt, defconfig},
614 {"savedefconfig", required_argument, &input_mode_opt, savedefconfig},
615 {"allnoconfig", no_argument, &input_mode_opt, allnoconfig},
616 {"allyesconfig", no_argument, &input_mode_opt, allyesconfig},
617 {"allmodconfig", no_argument, &input_mode_opt, allmodconfig},
618 {"alldefconfig", no_argument, &input_mode_opt, alldefconfig},
619 {"randconfig", no_argument, &input_mode_opt, randconfig},
620 {"listnewconfig", no_argument, &input_mode_opt, listnewconfig},
621 {"helpnewconfig", no_argument, &input_mode_opt, helpnewconfig},
622 {"olddefconfig", no_argument, &input_mode_opt, olddefconfig},
623 {"yes2modconfig", no_argument, &input_mode_opt, yes2modconfig},
624 {"mod2yesconfig", no_argument, &input_mode_opt, mod2yesconfig},
625 {"mod2noconfig", no_argument, &input_mode_opt, mod2noconfig},
626 {NULL, 0, NULL, 0}
627};
628
629static void conf_usage(const char *progname)
630{
631 printf("Usage: %s [options] kconfig_file\n", progname);
632 printf("\n");
633 printf("Generic options:\n");
634 printf(" -h, --help Print this message and exit.\n");
635 printf(" -s, --silent Do not print log.\n");
636 printf("\n");
637 printf("Mode options:\n");
638 printf(" --listnewconfig List new options\n");
639 printf(" --helpnewconfig List new options and help text\n");
640 printf(" --oldaskconfig Start a new configuration using a line-oriented program\n");
641 printf(" --oldconfig Update a configuration using a provided .config as base\n");
642 printf(" --syncconfig Similar to oldconfig but generates configuration in\n"
643 " include/{generated/,config/}\n");
644 printf(" --olddefconfig Same as oldconfig but sets new symbols to their default value\n");
645 printf(" --defconfig <file> New config with default defined in <file>\n");
646 printf(" --savedefconfig <file> Save the minimal current configuration to <file>\n");
647 printf(" --allnoconfig New config where all options are answered with no\n");
648 printf(" --allyesconfig New config where all options are answered with yes\n");
649 printf(" --allmodconfig New config where all options are answered with mod\n");
650 printf(" --alldefconfig New config with all symbols set to default\n");
651 printf(" --randconfig New config with random answer to all options\n");
652 printf(" --yes2modconfig Change answers from yes to mod if possible\n");
653 printf(" --mod2yesconfig Change answers from mod to yes if possible\n");
654 printf(" --mod2noconfig Change answers from mod to no if possible\n");
655 printf(" (If none of the above is given, --oldaskconfig is the default)\n");
656 printf("\n");
657 printf("Arguments:\n");
658 printf(" kconfig_file Top-level Kconfig file.\n");
659}
660
661int main(int ac, char **av)
662{
663 const char *progname = av[0];
664 int opt;
665 const char *name, *defconfig_file = NULL /* gcc uninit */;
666 int no_conf_write = 0;
667
668 tty_stdio = isatty(0) && isatty(1);
669
670 while ((opt = getopt_long(ac, av, "hs", long_opts, NULL)) != -1) {
671 switch (opt) {
672 case 'h':
673 conf_usage(progname);
674 exit(1);
675 break;
676 case 's':
677 conf_set_message_callback(NULL);
678 break;
679 case 0:
680 input_mode = input_mode_opt;
681 switch (input_mode) {
682 case syncconfig:
683 /*
684 * syncconfig is invoked during the build stage.
685 * Suppress distracting
686 * "configuration written to ..."
687 */
688 conf_set_message_callback(NULL);
689 sync_kconfig = 1;
690 break;
691 case defconfig:
692 case savedefconfig:
693 defconfig_file = optarg;
694 break;
695 case randconfig:
696 set_randconfig_seed();
697 break;
698 default:
699 break;
700 }
701 default:
702 break;
703 }
704 }
705 if (ac == optind) {
706 fprintf(stderr, "%s: Kconfig file missing\n", av[0]);
707 conf_usage(progname);
708 exit(1);
709 }
710 conf_parse(av[optind]);
711 //zconfdump(stdout);
712
713 switch (input_mode) {
714 case defconfig:
715 if (conf_read(defconfig_file)) {
716 fprintf(stderr,
717 "***\n"
718 "*** Can't find default configuration \"%s\"!\n"
719 "***\n",
720 defconfig_file);
721 exit(1);
722 }
723 break;
724 case savedefconfig:
725 case syncconfig:
726 case oldaskconfig:
727 case oldconfig:
728 case listnewconfig:
729 case helpnewconfig:
730 case olddefconfig:
731 case yes2modconfig:
732 case mod2yesconfig:
733 case mod2noconfig:
734 conf_read(NULL);
735 break;
736 case allnoconfig:
737 case allyesconfig:
738 case allmodconfig:
739 case alldefconfig:
740 case randconfig:
741 name = getenv("KCONFIG_ALLCONFIG");
742 if (!name)
743 break;
744 if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) {
745 if (conf_read_simple(name, S_DEF_USER)) {
746 fprintf(stderr,
747 "*** Can't read seed configuration \"%s\"!\n",
748 name);
749 exit(1);
750 }
751 break;
752 }
753 switch (input_mode) {
754 case allnoconfig: name = "allno.config"; break;
755 case allyesconfig: name = "allyes.config"; break;
756 case allmodconfig: name = "allmod.config"; break;
757 case alldefconfig: name = "alldef.config"; break;
758 case randconfig: name = "allrandom.config"; break;
759 default: break;
760 }
761 if (conf_read_simple(name, S_DEF_USER) &&
762 conf_read_simple("all.config", S_DEF_USER)) {
763 fprintf(stderr,
764 "*** KCONFIG_ALLCONFIG set, but no \"%s\" or \"all.config\" file found\n",
765 name);
766 exit(1);
767 }
768 break;
769 default:
770 break;
771 }
772
773 if (conf_errors())
774 exit(1);
775
776 if (sync_kconfig) {
777 name = getenv("KCONFIG_NOSILENTUPDATE");
778 if (name && *name) {
779 if (conf_get_changed()) {
780 fprintf(stderr,
781 "\n*** The configuration requires explicit update.\n\n");
782 return 1;
783 }
784 no_conf_write = 1;
785 }
786 }
787
788 switch (input_mode) {
789 case allnoconfig:
790 conf_set_all_new_symbols(def_no);
791 break;
792 case allyesconfig:
793 conf_set_all_new_symbols(def_yes);
794 break;
795 case allmodconfig:
796 conf_set_all_new_symbols(def_mod);
797 break;
798 case alldefconfig:
799 conf_set_all_new_symbols(def_default);
800 break;
801 case randconfig:
802 conf_set_all_new_symbols(def_random);
803 break;
804 case defconfig:
805 conf_set_all_new_symbols(def_default);
806 break;
807 case savedefconfig:
808 break;
809 case yes2modconfig:
810 conf_rewrite_tristates(yes, mod);
811 break;
812 case mod2yesconfig:
813 conf_rewrite_tristates(mod, yes);
814 break;
815 case mod2noconfig:
816 conf_rewrite_tristates(mod, no);
817 break;
818 case oldaskconfig:
819 rootEntry = &rootmenu;
820 conf(&rootmenu);
821 input_mode = oldconfig;
822 /* fall through */
823 case oldconfig:
824 case listnewconfig:
825 case helpnewconfig:
826 case syncconfig:
827 /* Update until a loop caused no more changes */
828 do {
829 conf_cnt = 0;
830 check_conf(&rootmenu);
831 } while (conf_cnt);
832 break;
833 case olddefconfig:
834 default:
835 break;
836 }
837
838 if (sym_dep_errors())
839 exit(1);
840
841 if (input_mode == savedefconfig) {
842 if (conf_write_defconfig(defconfig_file)) {
843 fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n",
844 defconfig_file);
845 return 1;
846 }
847 } else if (input_mode != listnewconfig && input_mode != helpnewconfig) {
848 if (!no_conf_write && conf_write(NULL)) {
849 fprintf(stderr, "\n*** Error during writing of the configuration.\n\n");
850 exit(1);
851 }
852
853 /*
854 * Create auto.conf if it does not exist.
855 * This prevents GNU Make 4.1 or older from emitting
856 * "include/config/auto.conf: No such file or directory"
857 * in the top-level Makefile
858 *
859 * syncconfig always creates or updates auto.conf because it is
860 * used during the build.
861 */
862 if (conf_write_autoconf(sync_kconfig) && sync_kconfig) {
863 fprintf(stderr,
864 "\n*** Error during sync of the configuration.\n\n");
865 return 1;
866 }
867 }
868 return 0;
869}