scripts/kconfig/menu.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 <ctype.h>
   7 #include <stdarg.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 #include "lkc.h"
  12
  13 static const char nohelp_text[] = "There is no help available for this option.";
  14
  15 struct menu rootmenu;
  16 static struct menu **last_entry_ptr;
  17
  18 struct file *file_list;
  19 struct file *current_file;
  20
  21 void menu_warn(struct menu *menu, const char *fmt, ...)
  22 {
  23         va_list ap;
  24         va_start(ap, fmt);
  25         fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
  26         vfprintf(stderr, fmt, ap);
  27         fprintf(stderr, "\n");
  28         va_end(ap);
  29 }
  30
  31 static void prop_warn(struct property *prop, const char *fmt, ...)
  32 {
  33         va_list ap;
  34         va_start(ap, fmt);
  35         fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
  36         vfprintf(stderr, fmt, ap);
  37         fprintf(stderr, "\n");
  38         va_end(ap);
  39 }
  40
  41 void _menu_init(void)
  42 {
  43         current_entry = current_menu = &rootmenu;
  44         last_entry_ptr = &rootmenu.list;
  45 }
  46
  47 void menu_add_entry(struct symbol *sym)
  48 {
  49         struct menu *menu;
  50
  51         menu = xmalloc(sizeof(*menu));
  52         memset(menu, 0, sizeof(*menu));
  53         menu->sym = sym;
  54         menu->parent = current_menu;
  55         menu->file = current_file;
  56         menu->lineno = zconf_lineno();
  57
  58         *last_entry_ptr = menu;
  59         last_entry_ptr = &menu->next;
  60         current_entry = menu;
  61         if (sym)
  62                 menu_add_symbol(P_SYMBOL, sym, NULL);
  63 }
  64
  65 void menu_end_entry(void)
  66 {
  67 }
  68
  69 struct menu *menu_add_menu(void)
  70 {
  71         menu_end_entry();
  72         last_entry_ptr = &current_entry->list;
  73         return current_menu = current_entry;
  74 }
  75
  76 void menu_end_menu(void)
  77 {
  78         last_entry_ptr = &current_menu->next;
  79         current_menu = current_menu->parent;
  80 }
  81
  82 static struct expr *menu_check_dep(struct expr *e)
  83 {
  84         if (!e)
  85                 return e;
  86
  87         switch (e->type) {
  88         case E_NOT:
  89                 e->left.expr = menu_check_dep(e->left.expr);
  90                 break;
  91         case E_OR:
  92         case E_AND:
  93                 e->left.expr = menu_check_dep(e->left.expr);
  94                 e->right.expr = menu_check_dep(e->right.expr);
  95                 break;
  96         case E_SYMBOL:
  97                 /* change 'm' into 'm' && MODULES */
  98                 if (e->left.sym == &symbol_mod)
  99                         return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
 100                 break;
 101         default:
 102                 break;
 103         }
 104         return e;
 105 }
 106
 107 void menu_add_dep(struct expr *dep)
 108 {
 109         current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
 110 }
 111
 112 void menu_set_type(int type)
 113 {
 114         struct symbol *sym = current_entry->sym;
 115
 116         if (sym->type == type)
 117                 return;
 118         if (sym->type == S_UNKNOWN) {
 119                 sym->type = type;
 120                 return;
 121         }
 122         menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'",
 123             sym->name ? sym->name : "<choice>",
 124             sym_type_name(sym->type), sym_type_name(type));
 125 }
 126
 127 struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
 128 {
 129         struct property *prop = prop_alloc(type, current_entry->sym);
 130
 131         prop->menu = current_entry;
 132         prop->expr = expr;
 133         prop->visible.expr = menu_check_dep(dep);
 134
 135         if (prompt) {
 136                 if (isspace(*prompt)) {
 137                         prop_warn(prop, "leading whitespace ignored");
 138                         while (isspace(*prompt))
 139                                 prompt++;
 140                 }
 141                 if (current_entry->prompt && current_entry != &rootmenu)
 142                         prop_warn(prop, "prompt redefined");
 143
 144                 /* Apply all upper menus' visibilities to actual prompts. */
 145                 if(type == P_PROMPT) {
 146                         struct menu *menu = current_entry;
 147
 148                         while ((menu = menu->parent) != NULL) {
 149                                 struct expr *dup_expr;
 150
 151                                 if (!menu->visibility)
 152                                         continue;
 153                                 /*
 154                                  * Do not add a reference to the
 155                                  * menu's visibility expression but
 156                                  * use a copy of it.  Otherwise the
 157                                  * expression reduction functions
 158                                  * will modify expressions that have
 159                                  * multiple references which can
 160                                  * cause unwanted side effects.
 161                                  */
 162                                 dup_expr = expr_copy(menu->visibility);
 163
 164                                 prop->visible.expr
 165                                         = expr_alloc_and(prop->visible.expr,
 166                                                          dup_expr);
 167                         }
 168                 }
 169
 170                 current_entry->prompt = prop;
 171         }
 172         prop->text = prompt;
 173
 174         return prop;
 175 }
 176
 177 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 178 {
 179         return menu_add_prop(type, prompt, NULL, dep);
 180 }
 181
 182 void menu_add_visibility(struct expr *expr)
 183 {
 184         current_entry->visibility = expr_alloc_and(current_entry->visibility,
 185             expr);
 186 }
 187
 188 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 189 {
 190         menu_add_prop(type, NULL, expr, dep);
 191 }
 192
 193 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 194 {
 195         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 196 }
 197
 198 void menu_add_option(int token, char *arg)
 199 {
 200         switch (token) {
 201         case T_OPT_MODULES:
 202                 if (modules_sym)
 203                         zconf_error("symbol '%s' redefines option 'modules'"
 204                                     " already defined by symbol '%s'",
 205                                     current_entry->sym->name,
 206                                     modules_sym->name
 207                                     );
 208                 modules_sym = current_entry->sym;
 209                 break;
 210         case T_OPT_DEFCONFIG_LIST:
 211                 if (!sym_defconfig_list)
 212                         sym_defconfig_list = current_entry->sym;
 213                 else if (sym_defconfig_list != current_entry->sym)
 214                         zconf_error("trying to redefine defconfig symbol");
 215                 break;
 216         case T_OPT_ENV:
 217                 prop_add_env(arg);
 218                 break;
 219         }
 220 }
 221
 222 static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
 223 {
 224         return sym2->type == S_INT || sym2->type == S_HEX ||
 225                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 226 }
 227
 228 static void sym_check_prop(struct symbol *sym)
 229 {
 230         struct property *prop;
 231         struct symbol *sym2;
 232         for (prop = sym->prop; prop; prop = prop->next) {
 233                 switch (prop->type) {
 234                 case P_DEFAULT:
 235                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 236                             prop->expr->type != E_SYMBOL)
 237                                 prop_warn(prop,
 238                                     "default for config symbol '%s'"
 239                                     " must be a single symbol", sym->name);
 240                         if (prop->expr->type != E_SYMBOL)
 241                                 break;
 242                         sym2 = prop_get_symbol(prop);
 243                         if (sym->type == S_HEX || sym->type == S_INT) {
 244                                 if (!menu_validate_number(sym, sym2))
 245                                         prop_warn(prop,
 246                                             "'%s': number is invalid",
 247                                             sym->name);
 248                         }
 249                         break;
 250                 case P_SELECT:
 251                         sym2 = prop_get_symbol(prop);
 252                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 253                                 prop_warn(prop,
 254                                     "config symbol '%s' uses select, but is "
 255                                     "not boolean or tristate", sym->name);
 256                         else if (sym2->type != S_UNKNOWN &&
 257                                  sym2->type != S_BOOLEAN &&
 258                                  sym2->type != S_TRISTATE)
 259                                 prop_warn(prop,
 260                                     "'%s' has wrong type. 'select' only "
 261                                     "accept arguments of boolean and "
 262                                     "tristate type", sym2->name);
 263                         break;
 264                 case P_RANGE:
 265                         if (sym->type != S_INT && sym->type != S_HEX)
 266                                 prop_warn(prop, "range is only allowed "
 267                                                 "for int or hex symbols");
 268                         if (!menu_validate_number(sym, prop->expr->left.sym) ||
 269                             !menu_validate_number(sym, prop->expr->right.sym))
 270                                 prop_warn(prop, "range is invalid");
 271                         break;
 272                 default:
 273                         ;
 274                 }
 275         }
 276 }
 277
 278 void menu_finalize(struct menu *parent)
 279 {
 280         struct menu *menu, *last_menu;
 281         struct symbol *sym;
 282         struct property *prop;
 283         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 284
 285         sym = parent->sym;
 286         if (parent->list) {
 287                 if (sym && sym_is_choice(sym)) {
 288                         if (sym->type == S_UNKNOWN) {
 289                                 /* find the first choice value to find out choice type */
 290                                 current_entry = parent;
 291                                 for (menu = parent->list; menu; menu = menu->next) {
 292                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 293                                                 menu_set_type(menu->sym->type);
 294                                                 break;
 295                                         }
 296                                 }
 297                         }
 298                         /* set the type of the remaining choice values */
 299                         for (menu = parent->list; menu; menu = menu->next) {
 300                                 current_entry = menu;
 301                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 302                                         menu_set_type(sym->type);
 303                         }
 304                         parentdep = expr_alloc_symbol(sym);
 305                 } else if (parent->prompt)
 306                         parentdep = parent->prompt->visible.expr;
 307                 else
 308                         parentdep = parent->dep;
 309
 310                 for (menu = parent->list; menu; menu = menu->next) {
 311                         basedep = expr_transform(menu->dep);
 312                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 313                         basedep = expr_eliminate_dups(basedep);
 314                         menu->dep = basedep;
 315                         if (menu->sym)
 316                                 prop = menu->sym->prop;
 317                         else
 318                                 prop = menu->prompt;
 319                         for (; prop; prop = prop->next) {
 320                                 if (prop->menu != menu)
 321                                         continue;
 322                                 dep = expr_transform(prop->visible.expr);
 323                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 324                                 dep = expr_eliminate_dups(dep);
 325                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 326                                         dep = expr_trans_bool(dep);
 327                                 prop->visible.expr = dep;
 328                                 if (prop->type == P_SELECT) {
 329                                         struct symbol *es = prop_get_symbol(prop);
 330                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 331                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 332                                 }
 333                         }
 334                 }
 335                 for (menu = parent->list; menu; menu = menu->next)
 336                         menu_finalize(menu);
 337         } else if (sym) {
 338                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 339                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 340                 basedep = expr_eliminate_dups(expr_transform(basedep));
 341                 last_menu = NULL;
 342                 for (menu = parent->next; menu; menu = menu->next) {
 343                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 344                         if (!expr_contains_symbol(dep, sym))
 345                                 break;
 346                         if (expr_depends_symbol(dep, sym))
 347                                 goto next;
 348                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 349                         dep = expr_eliminate_dups(expr_transform(dep));
 350                         dep2 = expr_copy(basedep);
 351                         expr_eliminate_eq(&dep, &dep2);
 352                         expr_free(dep);
 353                         if (!expr_is_yes(dep2)) {
 354                                 expr_free(dep2);
 355                                 break;
 356                         }
 357                         expr_free(dep2);
 358                 next:
 359                         menu_finalize(menu);
 360                         menu->parent = parent;
 361                         last_menu = menu;
 362                 }
 363                 if (last_menu) {
 364                         parent->list = parent->next;
 365                         parent->next = last_menu->next;
 366                         last_menu->next = NULL;
 367                 }
 368
 369                 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
 370         }
 371         for (menu = parent->list; menu; menu = menu->next) {
 372                 if (sym && sym_is_choice(sym) &&
 373                     menu->sym && !sym_is_choice_value(menu->sym)) {
 374                         current_entry = menu;
 375                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 376                         if (!menu->prompt)
 377                                 menu_warn(menu, "choice value must have a prompt");
 378                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 379                                 if (prop->type == P_DEFAULT)
 380                                         prop_warn(prop, "defaults for choice "
 381                                                   "values not supported");
 382                                 if (prop->menu == menu)
 383                                         continue;
 384                                 if (prop->type == P_PROMPT &&
 385                                     prop->menu->parent->sym != sym)
 386                                         prop_warn(prop, "choice value used outside its choice group");
 387                         }
 388                         /* Non-tristate choice values of tristate choices must
 389                          * depend on the choice being set to Y. The choice
 390                          * values' dependencies were propagated to their
 391                          * properties above, so the change here must be re-
 392                          * propagated.
 393                          */
 394                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 395                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 396                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 397                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 398                                         if (prop->menu != menu)
 399                                                 continue;
 400                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 401                                                                             prop->visible.expr);
 402                                 }
 403                         }
 404                         menu_add_symbol(P_CHOICE, sym, NULL);
 405                         prop = sym_get_choice_prop(sym);
 406                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 407                                 ;
 408                         *ep = expr_alloc_one(E_LIST, NULL);
 409                         (*ep)->right.sym = menu->sym;
 410                 }
 411                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 412                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 413                                 last_menu->parent = parent;
 414                                 if (!last_menu->next)
 415                                         break;
 416                         }
 417                         last_menu->next = menu->next;
 418                         menu->next = menu->list;
 419                         menu->list = NULL;
 420                 }
 421         }
 422
 423         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 424                 if (sym->type == S_UNKNOWN)
 425                         menu_warn(parent, "config symbol defined without type");
 426
 427                 if (sym_is_choice(sym) && !parent->prompt)
 428                         menu_warn(parent, "choice must have a prompt");
 429
 430                 /* Check properties connected to this symbol */
 431                 sym_check_prop(sym);
 432                 sym->flags |= SYMBOL_WARNED;
 433         }
 434
 435         if (sym && !sym_is_optional(sym) && parent->prompt) {
 436                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 437                                 expr_alloc_and(parent->prompt->visible.expr,
 438                                         expr_alloc_symbol(&symbol_mod)));
 439         }
 440 }
 441
 442 bool menu_has_prompt(struct menu *menu)
 443 {
 444         if (!menu->prompt)
 445                 return false;
 446         return true;
 447 }
 448
 449 /*
 450  * Determine if a menu is empty.
 451  * A menu is considered empty if it contains no or only
 452  * invisible entries.
 453  */
 454 bool menu_is_empty(struct menu *menu)
 455 {
 456         struct menu *child;
 457
 458         for (child = menu->list; child; child = child->next) {
 459                 if (menu_is_visible(child))
 460                         return(false);
 461         }
 462         return(true);
 463 }
 464
 465 bool menu_is_visible(struct menu *menu)
 466 {
 467         struct menu *child;
 468         struct symbol *sym;
 469         tristate visible;
 470
 471         if (!menu->prompt)
 472                 return false;
 473
 474         if (menu->visibility) {
 475                 if (expr_calc_value(menu->visibility) == no)
 476                         return no;
 477         }
 478
 479         sym = menu->sym;
 480         if (sym) {
 481                 sym_calc_value(sym);
 482                 visible = menu->prompt->visible.tri;
 483         } else
 484                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 485
 486         if (visible != no)
 487                 return true;
 488
 489         if (!sym || sym_get_tristate_value(menu->sym) == no)
 490                 return false;
 491
 492         for (child = menu->list; child; child = child->next) {
 493                 if (menu_is_visible(child)) {
 494                         if (sym)
 495                                 sym->flags |= SYMBOL_DEF_USER;
 496                         return true;
 497                 }
 498         }
 499
 500         return false;
 501 }
 502
 503 const char *menu_get_prompt(struct menu *menu)
 504 {
 505         if (menu->prompt)
 506                 return menu->prompt->text;
 507         else if (menu->sym)
 508                 return menu->sym->name;
 509         return NULL;
 510 }
 511
 512 struct menu *menu_get_root_menu(struct menu *menu)
 513 {
 514         return &rootmenu;
 515 }
 516
 517 struct menu *menu_get_parent_menu(struct menu *menu)
 518 {
 519         enum prop_type type;
 520
 521         for (; menu != &rootmenu; menu = menu->parent) {
 522                 type = menu->prompt ? menu->prompt->type : 0;
 523                 if (type == P_MENU)
 524                         break;
 525         }
 526         return menu;
 527 }
 528
 529 bool menu_has_help(struct menu *menu)
 530 {
 531         return menu->help != NULL;
 532 }
 533
 534 const char *menu_get_help(struct menu *menu)
 535 {
 536         if (menu->help)
 537                 return menu->help;
 538         else
 539                 return "";
 540 }
 541
 542 static void get_prompt_str(struct gstr *r, struct property *prop,
 543                            struct list_head *head)
 544 {
 545         int i, j;
 546         struct menu *submenu[8], *menu, *location = NULL;
 547         struct jump_key *jump;
 548
 549         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 550         menu = prop->menu->parent;
 551         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 552                 bool accessible = menu_is_visible(menu);
 553
 554                 submenu[i++] = menu;
 555                 if (location == NULL && accessible)
 556                         location = menu;
 557         }
 558         if (head && location) {
 559                 jump = xmalloc(sizeof(struct jump_key));
 560
 561                 if (menu_is_visible(prop->menu)) {
 562                         /*
 563                          * There is not enough room to put the hint at the
 564                          * beginning of the "Prompt" line. Put the hint on the
 565                          * last "Location" line even when it would belong on
 566                          * the former.
 567                          */
 568                         jump->target = prop->menu;
 569                 } else
 570                         jump->target = location;
 571
 572                 if (list_empty(head))
 573                         jump->index = 0;
 574                 else
 575                         jump->index = list_entry(head->prev, struct jump_key,
 576                                                  entries)->index + 1;
 577
 578                 list_add_tail(&jump->entries, head);
 579         }
 580
 581         if (i > 0) {
 582                 str_printf(r, _("  Location:\n"));
 583                 for (j = 4; --i >= 0; j += 2) {
 584                         menu = submenu[i];
 585                         if (head && location && menu == location)
 586                                 jump->offset = r->len - 1;
 587                         str_printf(r, "%*c-> %s", j, ' ',
 588                                    _(menu_get_prompt(menu)));
 589                         if (menu->sym) {
 590                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 591                                         menu->sym->name : _("<choice>"),
 592                                         sym_get_string_value(menu->sym));
 593                         }
 594                         str_append(r, "\n");
 595                 }
 596         }
 597 }
 598
 599 /*
 600  * get peoperty of type P_SYMBOL
 601  */
 602 static struct property *get_symbol_prop(struct symbol *sym)
 603 {
 604         struct property *prop = NULL;
 605
 606         for_all_properties(sym, prop, P_SYMBOL)
 607                 break;
 608         return prop;
 609 }
 610
 611 /*
 612  * head is optional and may be NULL
 613  */
 614 void get_symbol_str(struct gstr *r, struct symbol *sym,
 615                     struct list_head *head)
 616 {
 617         bool hit;
 618         struct property *prop;
 619
 620         if (sym && sym->name) {
 621                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 622                            sym_get_string_value(sym));
 623                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 624                 if (sym->type == S_INT || sym->type == S_HEX) {
 625                         prop = sym_get_range_prop(sym);
 626                         if (prop) {
 627                                 str_printf(r, "Range : ");
 628                                 expr_gstr_print(prop->expr, r);
 629                                 str_append(r, "\n");
 630                         }
 631                 }
 632         }
 633         for_all_prompts(sym, prop)
 634                 get_prompt_str(r, prop, head);
 635
 636         prop = get_symbol_prop(sym);
 637         if (prop) {
 638                 str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 639                         prop->menu->lineno);
 640                 if (!expr_is_yes(prop->visible.expr)) {
 641                         str_append(r, _("  Depends on: "));
 642                         expr_gstr_print(prop->visible.expr, r);
 643                         str_append(r, "\n");
 644                 }
 645         }
 646
 647         hit = false;
 648         for_all_properties(sym, prop, P_SELECT) {
 649                 if (!hit) {
 650                         str_append(r, "  Selects: ");
 651                         hit = true;
 652                 } else
 653                         str_printf(r, " && ");
 654                 expr_gstr_print(prop->expr, r);
 655         }
 656         if (hit)
 657                 str_append(r, "\n");
 658         if (sym->rev_dep.expr) {
 659                 str_append(r, _("  Selected by: "));
 660                 expr_gstr_print(sym->rev_dep.expr, r);
 661                 str_append(r, "\n");
 662         }
 663         str_append(r, "\n\n");
 664 }
 665
 666 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
 667 {
 668         struct symbol *sym;
 669         struct gstr res = str_new();
 670         int i;
 671
 672         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 673                 get_symbol_str(&res, sym, head);
 674         if (!i)
 675                 str_append(&res, _("No matches found.\n"));
 676         return res;
 677 }
 678
 679
 680 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 681 {
 682         struct symbol *sym = menu->sym;
 683         const char *help_text = nohelp_text;
 684
 685         if (menu_has_help(menu)) {
 686                 if (sym->name)
 687                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 688                 help_text = menu_get_help(menu);
 689         }
 690         str_printf(help, "%s\n", _(help_text));
 691         if (sym)
 692                 get_symbol_str(help, sym, NULL);
 693 }