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 20 static void conf(struct menu *menu); 21 static void check_conf(struct menu *menu); 22 23 enum 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 }; 41 static enum input_mode input_mode = oldaskconfig; 42 static int input_mode_opt; 43 static int indent = 1; 44 static int tty_stdio; 45 static int sync_kconfig; 46 static int conf_cnt; 47 static char line[PATH_MAX]; 48 static struct menu *rootEntry; 49 50 static 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 60 static 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. */ 78 static 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 87 static 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 */ 122 static 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 } 166 167 enum conf_def_mode { 168 def_default, 169 def_yes, 170 def_mod, 171 def_no, 172 def_random 173 }; 174 175 static 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 } 278 279 static 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 } 290 291 static 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 return 0; 302 } 303 304 switch (input_mode) { 305 case oldconfig: 306 case syncconfig: 307 if (sym_has_value(sym)) { 308 printf("%s\n", def ?: ""); 309 return 0; 310 } 311 /* fall through */ 312 default: 313 fflush(stdout); 314 xfgets(line, sizeof(line), stdin); 315 break; 316 } 317 318 return 1; 319 } 320 321 static int conf_string(struct menu *menu) 322 { 323 struct symbol *sym = menu->sym; 324 const char *def; 325 326 while (1) { 327 printf("%*s%s ", indent - 1, "", menu->prompt->text); 328 printf("(%s) ", sym->name); 329 def = sym_get_string_value(sym); 330 if (def) 331 printf("[%s] ", def); 332 if (!conf_askvalue(sym, def)) 333 return 0; 334 switch (line[0]) { 335 case '\n': 336 break; 337 case '?': 338 /* print help */ 339 if (line[1] == '\n') { 340 print_help(menu); 341 def = NULL; 342 break; 343 } 344 /* fall through */ 345 default: 346 line[strlen(line)-1] = 0; 347 def = line; 348 } 349 if (def && sym_set_string_value(sym, def)) 350 return 0; 351 352 /* 353 * A new int or hex symbol whose default fails validation 354 * cannot be set from an empty answer. When standard input is 355 * exhausted, as it is for a non-interactive oldconfig or 356 * syncconfig, re-asking would loop forever and grow the output 357 * until it exhausts memory. Stop with an error that names the 358 * symbol instead. String symbols accept any text, and bool and 359 * tristate symbols (conf_sym()) and choices (conf_choice()) 360 * accept the default on an empty line, so they are unaffected. 361 */ 362 if (feof(stdin)) { 363 fprintf(stderr, 364 "\nerror: no value for new symbol '%s' at end of input\n", 365 sym->name); 366 exit(1); 367 } 368 } 369 } 370 371 static int conf_sym(struct menu *menu) 372 { 373 struct symbol *sym = menu->sym; 374 tristate oldval, newval; 375 376 while (1) { 377 printf("%*s%s ", indent - 1, "", menu->prompt->text); 378 if (sym->name) 379 printf("(%s) ", sym->name); 380 putchar('['); 381 oldval = sym_get_tristate_value(sym); 382 switch (oldval) { 383 case no: 384 putchar('N'); 385 break; 386 case mod: 387 putchar('M'); 388 break; 389 case yes: 390 putchar('Y'); 391 break; 392 } 393 if (oldval != no && sym_tristate_within_range(sym, no)) 394 printf("/n"); 395 if (oldval != mod && sym_tristate_within_range(sym, mod)) 396 printf("/m"); 397 if (oldval != yes && sym_tristate_within_range(sym, yes)) 398 printf("/y"); 399 printf("/?] "); 400 if (!conf_askvalue(sym, sym_get_string_value(sym))) 401 return 0; 402 strip(line); 403 404 switch (line[0]) { 405 case 'n': 406 case 'N': 407 newval = no; 408 if (!line[1] || !strcmp(&line[1], "o")) 409 break; 410 continue; 411 case 'm': 412 case 'M': 413 newval = mod; 414 if (!line[1]) 415 break; 416 continue; 417 case 'y': 418 case 'Y': 419 newval = yes; 420 if (!line[1] || !strcmp(&line[1], "es")) 421 break; 422 continue; 423 case 0: 424 newval = oldval; 425 break; 426 case '?': 427 goto help; 428 default: 429 continue; 430 } 431 if (sym_set_tristate_value(sym, newval)) 432 return 0; 433 help: 434 print_help(menu); 435 } 436 } 437 438 static void conf_choice(struct menu *menu) 439 { 440 struct symbol *def_sym; 441 struct menu *child; 442 bool is_new = false; 443 444 while (1) { 445 int cnt, def; 446 447 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu)); 448 def_sym = sym_calc_choice(menu); 449 cnt = def = 0; 450 line[0] = 0; 451 for (child = menu->list; child; child = child->next) { 452 if (!menu_is_visible(child)) 453 continue; 454 if (!child->sym) { 455 printf("%*c %s\n", indent, '*', menu_get_prompt(child)); 456 continue; 457 } 458 cnt++; 459 if (child->sym == def_sym) { 460 def = cnt; 461 printf("%*c", indent, '>'); 462 } else 463 printf("%*c", indent, ' '); 464 printf(" %d. %s (%s)", cnt, menu_get_prompt(child), 465 child->sym->name); 466 if (!sym_has_value(child->sym)) { 467 is_new = true; 468 printf(" (NEW)"); 469 } 470 printf("\n"); 471 } 472 printf("%*schoice", indent - 1, ""); 473 if (cnt == 1) { 474 printf("[1]: 1\n"); 475 goto conf_childs; 476 } 477 printf("[1-%d?]: ", cnt); 478 switch (input_mode) { 479 case oldconfig: 480 case syncconfig: 481 if (!is_new) { 482 cnt = def; 483 printf("%d\n", cnt); 484 break; 485 } 486 /* fall through */ 487 case oldaskconfig: 488 fflush(stdout); 489 xfgets(line, sizeof(line), stdin); 490 strip(line); 491 if (line[0] == '?') { 492 print_help(menu); 493 continue; 494 } 495 if (!line[0]) 496 cnt = def; 497 else if (isdigit(line[0])) 498 cnt = atoi(line); 499 else 500 continue; 501 break; 502 default: 503 break; 504 } 505 506 conf_childs: 507 for (child = menu->list; child; child = child->next) { 508 if (!child->sym || !menu_is_visible(child)) 509 continue; 510 if (!--cnt) 511 break; 512 } 513 if (!child) 514 continue; 515 if (line[0] && line[strlen(line) - 1] == '?') { 516 print_help(child); 517 continue; 518 } 519 choice_set_value(menu, child->sym); 520 return; 521 } 522 } 523 524 static void conf(struct menu *menu) 525 { 526 struct symbol *sym; 527 struct property *prop; 528 struct menu *child; 529 530 if (!menu_is_visible(menu)) 531 return; 532 533 sym = menu->sym; 534 prop = menu->prompt; 535 if (prop) { 536 const char *prompt; 537 538 switch (prop->type) { 539 case P_MENU: 540 /* 541 * Except in oldaskconfig mode, we show only menus that 542 * contain new symbols. 543 */ 544 if (input_mode != oldaskconfig && rootEntry != menu) { 545 check_conf(menu); 546 return; 547 } 548 /* fall through */ 549 case P_COMMENT: 550 prompt = menu_get_prompt(menu); 551 if (prompt) 552 printf("%*c\n%*c %s\n%*c\n", 553 indent, '*', 554 indent, '*', prompt, 555 indent, '*'); 556 default: 557 ; 558 } 559 } 560 561 if (!sym) 562 goto conf_childs; 563 564 if (sym_is_choice(sym)) { 565 conf_choice(menu); 566 return; 567 } 568 569 switch (sym->type) { 570 case S_INT: 571 case S_HEX: 572 case S_STRING: 573 conf_string(menu); 574 break; 575 default: 576 conf_sym(menu); 577 break; 578 } 579 580 conf_childs: 581 if (sym) 582 indent += 2; 583 for (child = menu->list; child; child = child->next) 584 conf(child); 585 if (sym) 586 indent -= 2; 587 } 588 589 static void check_conf(struct menu *menu) 590 { 591 struct symbol *sym; 592 struct menu *child; 593 594 if (!menu_is_visible(menu)) 595 return; 596 597 sym = menu->sym; 598 if (sym && !sym_has_value(sym) && sym_is_changeable(sym)) { 599 switch (input_mode) { 600 case listnewconfig: 601 if (sym->name) 602 print_symbol_for_listconfig(sym); 603 break; 604 case helpnewconfig: 605 printf("-----\n"); 606 print_help(menu); 607 printf("-----\n"); 608 break; 609 default: 610 if (!conf_cnt++) 611 printf("*\n* Restart config...\n*\n"); 612 rootEntry = menu_get_menu_or_parent_menu(menu); 613 conf(rootEntry); 614 break; 615 } 616 } 617 618 for (child = menu->list; child; child = child->next) 619 check_conf(child); 620 } 621 622 static const struct option long_opts[] = { 623 {"help", no_argument, NULL, 'h'}, 624 {"silent", no_argument, NULL, 's'}, 625 {"oldaskconfig", no_argument, &input_mode_opt, oldaskconfig}, 626 {"oldconfig", no_argument, &input_mode_opt, oldconfig}, 627 {"syncconfig", no_argument, &input_mode_opt, syncconfig}, 628 {"defconfig", required_argument, &input_mode_opt, defconfig}, 629 {"savedefconfig", required_argument, &input_mode_opt, savedefconfig}, 630 {"allnoconfig", no_argument, &input_mode_opt, allnoconfig}, 631 {"allyesconfig", no_argument, &input_mode_opt, allyesconfig}, 632 {"allmodconfig", no_argument, &input_mode_opt, allmodconfig}, 633 {"alldefconfig", no_argument, &input_mode_opt, alldefconfig}, 634 {"randconfig", no_argument, &input_mode_opt, randconfig}, 635 {"listnewconfig", no_argument, &input_mode_opt, listnewconfig}, 636 {"helpnewconfig", no_argument, &input_mode_opt, helpnewconfig}, 637 {"olddefconfig", no_argument, &input_mode_opt, olddefconfig}, 638 {"yes2modconfig", no_argument, &input_mode_opt, yes2modconfig}, 639 {"mod2yesconfig", no_argument, &input_mode_opt, mod2yesconfig}, 640 {"mod2noconfig", no_argument, &input_mode_opt, mod2noconfig}, 641 {NULL, 0, NULL, 0} 642 }; 643 644 static void conf_usage(const char *progname) 645 { 646 printf("Usage: %s [options] kconfig_file\n", progname); 647 printf("\n"); 648 printf("Generic options:\n"); 649 printf(" -h, --help Print this message and exit.\n"); 650 printf(" -s, --silent Do not print log.\n"); 651 printf("\n"); 652 printf("Mode options:\n"); 653 printf(" --listnewconfig List new options\n"); 654 printf(" --helpnewconfig List new options and help text\n"); 655 printf(" --oldaskconfig Start a new configuration using a line-oriented program\n"); 656 printf(" --oldconfig Update a configuration using a provided .config as base\n"); 657 printf(" --syncconfig Similar to oldconfig but generates configuration in\n" 658 " include/{generated/,config/}\n"); 659 printf(" --olddefconfig Same as oldconfig but sets new symbols to their default value\n"); 660 printf(" --defconfig <file> New config with default defined in <file>\n"); 661 printf(" --savedefconfig <file> Save the minimal current configuration to <file>\n"); 662 printf(" --allnoconfig New config where all options are answered with no\n"); 663 printf(" --allyesconfig New config where all options are answered with yes\n"); 664 printf(" --allmodconfig New config where all options are answered with mod\n"); 665 printf(" --alldefconfig New config with all symbols set to default\n"); 666 printf(" --randconfig New config with random answer to all options\n"); 667 printf(" --yes2modconfig Change answers from yes to mod if possible\n"); 668 printf(" --mod2yesconfig Change answers from mod to yes if possible\n"); 669 printf(" --mod2noconfig Change answers from mod to no if possible\n"); 670 printf(" (If none of the above is given, --oldaskconfig is the default)\n"); 671 printf("\n"); 672 printf("Arguments:\n"); 673 printf(" kconfig_file Top-level Kconfig file.\n"); 674 } 675 676 int main(int ac, char **av) 677 { 678 const char *progname = av[0]; 679 int opt; 680 const char *name, *defconfig_file = NULL /* gcc uninit */; 681 int no_conf_write = 0; 682 683 tty_stdio = isatty(0) && isatty(1); 684 685 while ((opt = getopt_long(ac, av, "hs", long_opts, NULL)) != -1) { 686 switch (opt) { 687 case 'h': 688 conf_usage(progname); 689 exit(1); 690 break; 691 case 's': 692 conf_set_message_callback(NULL); 693 break; 694 case 0: 695 input_mode = input_mode_opt; 696 switch (input_mode) { 697 case syncconfig: 698 /* 699 * syncconfig is invoked during the build stage. 700 * Suppress distracting 701 * "configuration written to ..." 702 */ 703 conf_set_message_callback(NULL); 704 sync_kconfig = 1; 705 break; 706 case defconfig: 707 case savedefconfig: 708 defconfig_file = optarg; 709 break; 710 case randconfig: 711 set_randconfig_seed(); 712 break; 713 default: 714 break; 715 } 716 default: 717 break; 718 } 719 } 720 if (ac == optind) { 721 fprintf(stderr, "%s: Kconfig file missing\n", av[0]); 722 conf_usage(progname); 723 exit(1); 724 } 725 conf_parse(av[optind]); 726 //zconfdump(stdout); 727 728 switch (input_mode) { 729 case defconfig: 730 if (conf_read(defconfig_file)) { 731 fprintf(stderr, 732 "***\n" 733 "*** Can't find default configuration \"%s\"!\n" 734 "***\n", 735 defconfig_file); 736 exit(1); 737 } 738 break; 739 case savedefconfig: 740 case syncconfig: 741 case oldaskconfig: 742 case oldconfig: 743 case listnewconfig: 744 case helpnewconfig: 745 case olddefconfig: 746 case yes2modconfig: 747 case mod2yesconfig: 748 case mod2noconfig: 749 conf_read(NULL); 750 break; 751 case allnoconfig: 752 case allyesconfig: 753 case allmodconfig: 754 case alldefconfig: 755 case randconfig: 756 name = getenv("KCONFIG_ALLCONFIG"); 757 if (!name) 758 break; 759 if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) { 760 if (conf_read_simple(name, S_DEF_USER)) { 761 fprintf(stderr, 762 "*** Can't read seed configuration \"%s\"!\n", 763 name); 764 exit(1); 765 } 766 break; 767 } 768 switch (input_mode) { 769 case allnoconfig: name = "allno.config"; break; 770 case allyesconfig: name = "allyes.config"; break; 771 case allmodconfig: name = "allmod.config"; break; 772 case alldefconfig: name = "alldef.config"; break; 773 case randconfig: name = "allrandom.config"; break; 774 default: break; 775 } 776 if (conf_read_simple(name, S_DEF_USER) && 777 conf_read_simple("all.config", S_DEF_USER)) { 778 fprintf(stderr, 779 "*** KCONFIG_ALLCONFIG set, but no \"%s\" or \"all.config\" file found\n", 780 name); 781 exit(1); 782 } 783 break; 784 default: 785 break; 786 } 787 788 if (conf_errors()) 789 exit(1); 790 791 if (sync_kconfig) { 792 name = getenv("KCONFIG_NOSILENTUPDATE"); 793 if (name && *name) { 794 if (conf_get_changed()) { 795 fprintf(stderr, 796 "\n*** The configuration requires explicit update.\n\n"); 797 return 1; 798 } 799 no_conf_write = 1; 800 } 801 } 802 803 switch (input_mode) { 804 case allnoconfig: 805 conf_set_all_new_symbols(def_no); 806 break; 807 case allyesconfig: 808 conf_set_all_new_symbols(def_yes); 809 break; 810 case allmodconfig: 811 conf_set_all_new_symbols(def_mod); 812 break; 813 case alldefconfig: 814 conf_set_all_new_symbols(def_default); 815 break; 816 case randconfig: 817 conf_set_all_new_symbols(def_random); 818 break; 819 case defconfig: 820 conf_set_all_new_symbols(def_default); 821 break; 822 case savedefconfig: 823 break; 824 case yes2modconfig: 825 conf_rewrite_tristates(yes, mod); 826 break; 827 case mod2yesconfig: 828 conf_rewrite_tristates(mod, yes); 829 break; 830 case mod2noconfig: 831 conf_rewrite_tristates(mod, no); 832 break; 833 case oldaskconfig: 834 rootEntry = &rootmenu; 835 conf(&rootmenu); 836 input_mode = oldconfig; 837 /* fall through */ 838 case oldconfig: 839 case listnewconfig: 840 case helpnewconfig: 841 case syncconfig: 842 /* Update until a loop caused no more changes */ 843 do { 844 conf_cnt = 0; 845 check_conf(&rootmenu); 846 } while (conf_cnt); 847 break; 848 case olddefconfig: 849 default: 850 break; 851 } 852 853 if (sym_dep_errors()) 854 exit(1); 855 856 if (input_mode == savedefconfig) { 857 if (conf_write_defconfig(defconfig_file)) { 858 fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n", 859 defconfig_file); 860 return 1; 861 } 862 } else if (input_mode != listnewconfig && input_mode != helpnewconfig) { 863 if (!no_conf_write && conf_write(NULL)) { 864 fprintf(stderr, "\n*** Error during writing of the configuration.\n\n"); 865 exit(1); 866 } 867 868 /* 869 * Create auto.conf if it does not exist. 870 * This prevents GNU Make 4.1 or older from emitting 871 * "include/config/auto.conf: No such file or directory" 872 * in the top-level Makefile 873 * 874 * syncconfig always creates or updates auto.conf because it is 875 * used during the build. 876 */ 877 if (conf_write_autoconf(sync_kconfig) && sync_kconfig) { 878 fprintf(stderr, 879 "\n*** Error during sync of the configuration.\n\n"); 880 return 1; 881 } 882 } 883 return 0; 884 } 885