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SubjectRe: [PATCH] kconfig: use $K64BIT to set 64BIT with all*config targets
Hi,

On Wed, 14 Nov 2007, Sam Ravnborg wrote:

> The value can be supplied on the command-line so we need to validate input.

Is there a need for this?
BTW ARCH was already available as a value in the Kconfig files, so setting
the 64BIT option was already possible without any changes the kconfig
system, e.g.:

config 64BIT
bool "64 Bit kernel" if ARCH!="i386" && ARCH!="x86_64"
default ARCH="x86_64"

The patch below adds some features to it:
- it allows to import any environment variable by specifying "option env=..."
- it generates a dependency on it, so the kernel config is updated if it
changes.

Please revert the K64BIT changes and use this instead.

> The code is a copy of what happen when reading a all.config file and
> the functionality should be equal.
> Can we make that part simpler too?

These are two different uses, when reading a .config only the basic syntax
is checked, but not the value itself.

> By the way - I have never understood the purpose of the flags (S_DEF_USER etc.)
> Can we have a few comments added to their definition?

It allows to hold multiple configs, a user of it is conf_split_config()
which loads another config and compares to the current config and updates
the files under include/config as needed.
It could also be used by front ends to display what actually changed
compared to e.g. the saved config.

> One of the blockers are that kconfig does not support more than one prompt
> for a choice symbol. Is this something you can fix - or sketch how to fix it?

The basic idea is to add a name to the choice, so multiple choices can be
grouped together. This requires some changes to the dependency check to
make sure one choice option doesn't depend on another (which is currently
enforced by the syntax).

bye, Roman


Signed-off-by: Roman Zippel <zippel@linux-m68k.org>

---
init/Kconfig | 4 ++
scripts/kconfig/expr.c | 16 +++++-----
scripts/kconfig/expr.h | 5 +--
scripts/kconfig/lkc.h | 5 +++
scripts/kconfig/menu.c | 7 +++-
scripts/kconfig/qconf.cc | 15 ++-------
scripts/kconfig/symbol.c | 53 +++++++++++++++++++++++++++++------
scripts/kconfig/util.c | 25 +++++++++++++++-
scripts/kconfig/zconf.gperf | 1
scripts/kconfig/zconf.hash.c_shipped | 45 ++++++++++++++++-------------
10 files changed, 123 insertions(+), 53 deletions(-)

Index: linux-2.6/init/Kconfig
===================================================================
--- linux-2.6.orig/init/Kconfig
+++ linux-2.6/init/Kconfig
@@ -7,6 +7,10 @@ config DEFCONFIG_LIST
default "/boot/config-$UNAME_RELEASE"
default "arch/$ARCH/defconfig"

+config ARCH
+ string
+ option env="ARCH"
+
menu "General setup"

config EXPERIMENTAL
Index: linux-2.6/scripts/kconfig/expr.c
===================================================================
--- linux-2.6.orig/scripts/kconfig/expr.c
+++ linux-2.6/scripts/kconfig/expr.c
@@ -87,7 +87,7 @@ struct expr *expr_copy(struct expr *org)
break;
case E_AND:
case E_OR:
- case E_CHOICE:
+ case E_LIST:
e->left.expr = expr_copy(org->left.expr);
e->right.expr = expr_copy(org->right.expr);
break;
@@ -217,7 +217,7 @@ int expr_eq(struct expr *e1, struct expr
expr_free(e2);
trans_count = old_count;
return res;
- case E_CHOICE:
+ case E_LIST:
case E_RANGE:
case E_NONE:
/* panic */;
@@ -648,7 +648,7 @@ struct expr *expr_transform(struct expr
case E_EQUAL:
case E_UNEQUAL:
case E_SYMBOL:
- case E_CHOICE:
+ case E_LIST:
break;
default:
e->left.expr = expr_transform(e->left.expr);
@@ -932,7 +932,7 @@ struct expr *expr_trans_compare(struct e
break;
case E_SYMBOL:
return expr_alloc_comp(type, e->left.sym, sym);
- case E_CHOICE:
+ case E_LIST:
case E_RANGE:
case E_NONE:
/* panic */;
@@ -1000,9 +1000,9 @@ int expr_compare_type(enum expr_type t1,
if (t2 == E_OR)
return 1;
case E_OR:
- if (t2 == E_CHOICE)
+ if (t2 == E_LIST)
return 1;
- case E_CHOICE:
+ case E_LIST:
if (t2 == 0)
return 1;
default:
@@ -1053,11 +1053,11 @@ void expr_print(struct expr *e, void (*f
fn(data, NULL, " && ");
expr_print(e->right.expr, fn, data, E_AND);
break;
- case E_CHOICE:
+ case E_LIST:
fn(data, e->right.sym, e->right.sym->name);
if (e->left.expr) {
fn(data, NULL, " ^ ");
- expr_print(e->left.expr, fn, data, E_CHOICE);
+ expr_print(e->left.expr, fn, data, E_LIST);
}
break;
case E_RANGE:
Index: linux-2.6/scripts/kconfig/expr.h
===================================================================
--- linux-2.6.orig/scripts/kconfig/expr.h
+++ linux-2.6/scripts/kconfig/expr.h
@@ -32,7 +32,7 @@ typedef enum tristate {
} tristate;

enum expr_type {
- E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE
+ E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
};

union expr_data {
@@ -105,7 +105,8 @@ struct symbol {
#define SYMBOL_HASHMASK 0xff

enum prop_type {
- P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
+ P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE,
+ P_SELECT, P_RANGE, P_ENV
};

struct property {
Index: linux-2.6/scripts/kconfig/lkc.h
===================================================================
--- linux-2.6.orig/scripts/kconfig/lkc.h
+++ linux-2.6/scripts/kconfig/lkc.h
@@ -44,6 +44,7 @@ extern "C" {

#define T_OPT_MODULES 1
#define T_OPT_DEFCONFIG_LIST 2
+#define T_OPT_ENV 3

struct kconf_id {
int name;
@@ -74,6 +75,7 @@ void kconfig_load(void);

/* menu.c */
void menu_init(void);
+void menu_warn(struct menu *menu, const char *fmt, ...);
struct menu *menu_add_menu(void);
void menu_end_menu(void);
void menu_add_entry(struct symbol *sym);
@@ -103,6 +105,8 @@ void str_printf(struct gstr *gs, const c
const char *str_get(struct gstr *gs);

/* symbol.c */
+struct expr *sym_env_list;
+
void sym_init(void);
void sym_clear_all_valid(void);
void sym_set_all_changed(void);
@@ -110,6 +114,7 @@ void sym_set_changed(struct symbol *sym)
struct symbol *sym_check_deps(struct symbol *sym);
struct property *prop_alloc(enum prop_type type, struct symbol *sym);
struct symbol *prop_get_symbol(struct property *prop);
+struct property *sym_get_env_prop(struct symbol *sym);

static inline tristate sym_get_tristate_value(struct symbol *sym)
{
Index: linux-2.6/scripts/kconfig/menu.c
===================================================================
--- linux-2.6.orig/scripts/kconfig/menu.c
+++ linux-2.6/scripts/kconfig/menu.c
@@ -15,7 +15,7 @@ static struct menu **last_entry_ptr;
struct file *file_list;
struct file *current_file;

-static void menu_warn(struct menu *menu, const char *fmt, ...)
+void menu_warn(struct menu *menu, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
@@ -172,6 +172,9 @@ void menu_add_option(int token, char *ar
else if (sym_defconfig_list != current_entry->sym)
zconf_error("trying to redefine defconfig symbol");
break;
+ case T_OPT_ENV:
+ prop_add_env(arg);
+ break;
}
}

@@ -331,7 +334,7 @@ void menu_finalize(struct menu *parent)
prop = sym_get_choice_prop(sym);
for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
;
- *ep = expr_alloc_one(E_CHOICE, NULL);
+ *ep = expr_alloc_one(E_LIST, NULL);
(*ep)->right.sym = menu->sym;
}
if (menu->list && (!menu->prompt || !menu->prompt->text)) {
Index: linux-2.6/scripts/kconfig/qconf.cc
===================================================================
--- linux-2.6.orig/scripts/kconfig/qconf.cc
+++ linux-2.6/scripts/kconfig/qconf.cc
@@ -1083,7 +1083,10 @@ QString ConfigInfoView::debug_info(struc
debug += "</a><br>";
break;
case P_DEFAULT:
- debug += "default: ";
+ case P_SELECT:
+ case P_ENV:
+ debug += prop_get_type_name(prop->type);
+ debug += ": ";
expr_print(prop->expr, expr_print_help, &debug, E_NONE);
debug += "<br>";
break;
@@ -1094,16 +1097,6 @@ QString ConfigInfoView::debug_info(struc
debug += "<br>";
}
break;
- case P_SELECT:
- debug += "select: ";
- expr_print(prop->expr, expr_print_help, &debug, E_NONE);
- debug += "<br>";
- break;
- case P_RANGE:
- debug += "range: ";
- expr_print(prop->expr, expr_print_help, &debug, E_NONE);
- debug += "<br>";
- break;
default:
debug += "unknown property: ";
debug += prop_get_type_name(prop->type);
Index: linux-2.6/scripts/kconfig/symbol.c
===================================================================
--- linux-2.6.orig/scripts/kconfig/symbol.c
+++ linux-2.6/scripts/kconfig/symbol.c
@@ -34,6 +34,8 @@ struct symbol *sym_defconfig_list;
struct symbol *modules_sym;
tristate modules_val;

+struct expr *sym_env_list;
+
void sym_add_default(struct symbol *sym, const char *def)
{
struct property *prop = prop_alloc(P_DEFAULT, sym);
@@ -54,13 +56,6 @@ void sym_init(void)

uname(&uts);

- sym = sym_lookup("ARCH", 0);
- sym->type = S_STRING;
- sym->flags |= SYMBOL_AUTO;
- p = getenv("ARCH");
- if (p)
- sym_add_default(sym, p);
-
sym = sym_lookup("KERNELVERSION", 0);
sym->type = S_STRING;
sym->flags |= SYMBOL_AUTO;
@@ -117,6 +112,15 @@ struct property *sym_get_choice_prop(str
return NULL;
}

+struct property *sym_get_env_prop(struct symbol *sym)
+{
+ struct property *prop;
+
+ for_all_properties(sym, prop, P_ENV)
+ return prop;
+ return NULL;
+}
+
struct property *sym_get_default_prop(struct symbol *sym)
{
struct property *prop;
@@ -347,6 +351,9 @@ void sym_calc_value(struct symbol *sym)
;
}

+ if (sym->flags & SYMBOL_AUTO)
+ sym->flags &= ~SYMBOL_WRITE;
+
sym->curr = newval;
if (sym_is_choice(sym) && newval.tri == yes)
sym->curr.val = sym_calc_choice(sym);
@@ -849,7 +856,7 @@ struct property *prop_alloc(enum prop_ty
struct symbol *prop_get_symbol(struct property *prop)
{
if (prop->expr && (prop->expr->type == E_SYMBOL ||
- prop->expr->type == E_CHOICE))
+ prop->expr->type == E_LIST))
return prop->expr->left.sym;
return NULL;
}
@@ -859,6 +866,8 @@ const char *prop_get_type_name(enum prop
switch (type) {
case P_PROMPT:
return "prompt";
+ case P_ENV:
+ return "env";
case P_COMMENT:
return "comment";
case P_MENU:
@@ -876,3 +885,31 @@ const char *prop_get_type_name(enum prop
}
return "unknown";
}
+
+void prop_add_env(const char *env)
+{
+ struct symbol *sym, *sym2;
+ struct property *prop;
+ char *p;
+
+ sym = current_entry->sym;
+ sym->flags |= SYMBOL_AUTO;
+ for_all_properties(sym, prop, P_ENV) {
+ sym2 = prop_get_symbol(prop);
+ if (strcmp(sym2->name, env))
+ menu_warn(current_entry, "Redefining environment symbol");
+ return;
+ }
+
+ prop = prop_alloc(P_ENV, sym);
+ prop->expr = expr_alloc_symbol(sym_lookup(env, 1));
+
+ sym_env_list = expr_alloc_one(E_LIST, sym_env_list);
+ sym_env_list->right.sym = sym;
+
+ p = getenv(env);
+ if (p)
+ sym_add_default(sym, p);
+ else
+ menu_warn(current_entry, "environment variable %s undefined", sym->name);
+}
Index: linux-2.6/scripts/kconfig/util.c
===================================================================
--- linux-2.6.orig/scripts/kconfig/util.c
+++ linux-2.6/scripts/kconfig/util.c
@@ -29,6 +29,7 @@ struct file *file_lookup(const char *nam
/* write a dependency file as used by kbuild to track dependencies */
int file_write_dep(const char *name)
{
+ struct expr *e;
struct file *file;
FILE *out;

@@ -45,8 +46,28 @@ int file_write_dep(const char *name)
fprintf(out, "\t%s\n", file->name);
}
fprintf(out, "\ninclude/config/auto.conf: \\\n"
- "\t$(deps_config)\n\n"
- "$(deps_config): ;\n");
+ "\t$(deps_config)\n\n");
+
+ for (e = sym_env_list; e; e = e->left.expr) {
+ struct property *p;
+ struct symbol *sym, *env_sym;
+ const char *value;
+
+ sym = e->right.sym;
+ p = sym_get_env_prop(sym);
+ env_sym = prop_get_symbol(p);
+ if (!env_sym)
+ continue;
+ value = sym_get_string_value(sym);
+ if ((sym->type == S_BOOLEAN || sym->type == S_TRISTATE) &&
+ sym_get_tristate_value(sym) == no)
+ value = "";
+ fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
+ fprintf(out, "include/config/auto.conf: FORCE\n");
+ fprintf(out, "endif\n");
+ }
+
+ fprintf(out, "\n$(deps_config): ;\n");
fclose(out);
rename("..config.tmp", name);
return 0;
Index: linux-2.6/scripts/kconfig/zconf.gperf
===================================================================
--- linux-2.6.orig/scripts/kconfig/zconf.gperf
+++ linux-2.6/scripts/kconfig/zconf.gperf
@@ -41,4 +41,5 @@ option, T_OPTION, TF_COMMAND
on, T_ON, TF_PARAM
modules, T_OPT_MODULES, TF_OPTION
defconfig_list, T_OPT_DEFCONFIG_LIST,TF_OPTION
+env, T_OPT_ENV, TF_OPTION
%%
Index: linux-2.6/scripts/kconfig/zconf.hash.c_shipped
===================================================================
--- linux-2.6.orig/scripts/kconfig/zconf.hash.c_shipped
+++ linux-2.6/scripts/kconfig/zconf.hash.c_shipped
@@ -53,10 +53,10 @@ kconf_id_hash (register const char *str,
49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
- 49, 49, 49, 49, 49, 49, 49, 18, 11, 5,
+ 49, 49, 49, 49, 49, 49, 49, 35, 35, 5,
0, 0, 5, 49, 5, 20, 49, 49, 5, 20,
- 5, 0, 30, 49, 0, 15, 0, 10, 49, 49,
- 25, 49, 49, 49, 49, 49, 49, 49, 49, 49,
+ 5, 0, 30, 49, 0, 15, 0, 10, 0, 49,
+ 10, 49, 49, 49, 49, 49, 49, 49, 49, 49,
49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
49, 49, 49, 49, 49, 49, 49, 49, 49, 49,
@@ -89,6 +89,7 @@ kconf_id_hash (register const char *str,
struct kconf_id_strings_t
{
char kconf_id_strings_str2[sizeof("on")];
+ char kconf_id_strings_str3[sizeof("env")];
char kconf_id_strings_str5[sizeof("endif")];
char kconf_id_strings_str6[sizeof("option")];
char kconf_id_strings_str7[sizeof("endmenu")];
@@ -99,30 +100,31 @@ struct kconf_id_strings_t
char kconf_id_strings_str12[sizeof("default")];
char kconf_id_strings_str13[sizeof("def_bool")];
char kconf_id_strings_str14[sizeof("help")];
- char kconf_id_strings_str15[sizeof("bool")];
char kconf_id_strings_str16[sizeof("config")];
char kconf_id_strings_str17[sizeof("def_tristate")];
- char kconf_id_strings_str18[sizeof("boolean")];
+ char kconf_id_strings_str18[sizeof("hex")];
char kconf_id_strings_str19[sizeof("defconfig_list")];
char kconf_id_strings_str21[sizeof("string")];
char kconf_id_strings_str22[sizeof("if")];
char kconf_id_strings_str23[sizeof("int")];
- char kconf_id_strings_str24[sizeof("enable")];
char kconf_id_strings_str26[sizeof("select")];
char kconf_id_strings_str27[sizeof("modules")];
char kconf_id_strings_str28[sizeof("tristate")];
char kconf_id_strings_str29[sizeof("menu")];
char kconf_id_strings_str31[sizeof("source")];
char kconf_id_strings_str32[sizeof("comment")];
- char kconf_id_strings_str33[sizeof("hex")];
char kconf_id_strings_str35[sizeof("menuconfig")];
char kconf_id_strings_str36[sizeof("prompt")];
char kconf_id_strings_str37[sizeof("depends")];
+ char kconf_id_strings_str39[sizeof("bool")];
+ char kconf_id_strings_str41[sizeof("enable")];
+ char kconf_id_strings_str42[sizeof("boolean")];
char kconf_id_strings_str48[sizeof("mainmenu")];
};
static struct kconf_id_strings_t kconf_id_strings_contents =
{
"on",
+ "env",
"endif",
"option",
"endmenu",
@@ -133,25 +135,25 @@ static struct kconf_id_strings_t kconf_i
"default",
"def_bool",
"help",
- "bool",
"config",
"def_tristate",
- "boolean",
+ "hex",
"defconfig_list",
"string",
"if",
"int",
- "enable",
"select",
"modules",
"tristate",
"menu",
"source",
"comment",
- "hex",
"menuconfig",
"prompt",
"depends",
+ "bool",
+ "enable",
+ "boolean",
"mainmenu"
};
#define kconf_id_strings ((const char *) &kconf_id_strings_contents)
@@ -163,7 +165,7 @@ kconf_id_lookup (register const char *st
{
enum
{
- TOTAL_KEYWORDS = 31,
+ TOTAL_KEYWORDS = 32,
MIN_WORD_LENGTH = 2,
MAX_WORD_LENGTH = 14,
MIN_HASH_VALUE = 2,
@@ -174,7 +176,8 @@ kconf_id_lookup (register const char *st
{
{-1}, {-1},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str2, T_ON, TF_PARAM},
- {-1}, {-1},
+ {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str3, T_OPT_ENV, TF_OPTION},
+ {-1},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str5, T_ENDIF, TF_COMMAND},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str6, T_OPTION, TF_COMMAND},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str7, T_ENDMENU, TF_COMMAND},
@@ -185,17 +188,16 @@ kconf_id_lookup (register const char *st
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str12, T_DEFAULT, TF_COMMAND, S_UNKNOWN},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str13, T_DEFAULT, TF_COMMAND, S_BOOLEAN},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str14, T_HELP, TF_COMMAND},
- {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str15, T_TYPE, TF_COMMAND, S_BOOLEAN},
+ {-1},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str16, T_CONFIG, TF_COMMAND},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str17, T_DEFAULT, TF_COMMAND, S_TRISTATE},
- {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str18, T_TYPE, TF_COMMAND, S_BOOLEAN},
+ {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str18, T_TYPE, TF_COMMAND, S_HEX},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str19, T_OPT_DEFCONFIG_LIST,TF_OPTION},
{-1},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str21, T_TYPE, TF_COMMAND, S_STRING},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str22, T_IF, TF_COMMAND|TF_PARAM},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str23, T_TYPE, TF_COMMAND, S_INT},
- {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str24, T_SELECT, TF_COMMAND},
- {-1},
+ {-1}, {-1},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str26, T_SELECT, TF_COMMAND},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str27, T_OPT_MODULES, TF_OPTION},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str28, T_TYPE, TF_COMMAND, S_TRISTATE},
@@ -203,13 +205,16 @@ kconf_id_lookup (register const char *st
{-1},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str31, T_SOURCE, TF_COMMAND},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str32, T_COMMENT, TF_COMMAND},
- {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str33, T_TYPE, TF_COMMAND, S_HEX},
- {-1},
+ {-1}, {-1},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str35, T_MENUCONFIG, TF_COMMAND},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str36, T_PROMPT, TF_COMMAND},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str37, T_DEPENDS, TF_COMMAND},
- {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
{-1},
+ {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str39, T_TYPE, TF_COMMAND, S_BOOLEAN},
+ {-1},
+ {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str41, T_SELECT, TF_COMMAND},
+ {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str42, T_TYPE, TF_COMMAND, S_BOOLEAN},
+ {-1}, {-1}, {-1}, {-1}, {-1},
{(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str48, T_MAINMENU, TF_COMMAND}
};

-
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