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authorRoman Zippel <zippel@linux-m68k.org>2008-01-14 04:50:54 +0100
committerSam Ravnborg <sam@ravnborg.org>2008-01-28 23:14:39 +0100
commit93449082e905ce73d0346d617dd67c4b668b58af (patch)
treeeba7030f32ce18fa71562224ee2e0d8ddda33421
parent7a962923359768e04137125bd479fd0dfa6117d3 (diff)
downloadlinux-linaro-93449082e905ce73d0346d617dd67c4b668b58af.tar.gz
kconfig: environment symbol support
Add the possibility to import a value from the environment into kconfig via the option syntax. Beside flexibility this has the advantage providing proper dependencies. Documented the options syntax. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
-rw-r--r--Documentation/kbuild/kconfig-language.txt21
-rw-r--r--scripts/kconfig/expr.h3
-rw-r--r--scripts/kconfig/lkc.h5
-rw-r--r--scripts/kconfig/menu.c5
-rw-r--r--scripts/kconfig/qconf.cc16
-rw-r--r--scripts/kconfig/symbol.c45
-rw-r--r--scripts/kconfig/util.c23
-rw-r--r--scripts/kconfig/zconf.gperf1
-rw-r--r--scripts/kconfig/zconf.hash.c_shipped45
9 files changed, 129 insertions, 35 deletions
diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt
index 53ca12f7999..a43fcc68e17 100644
--- a/Documentation/kbuild/kconfig-language.txt
+++ b/Documentation/kbuild/kconfig-language.txt
@@ -127,6 +127,27 @@ applicable everywhere (see syntax).
used to help visually separate configuration logic from help within
the file as an aid to developers.
+- misc options: "option" <symbol>[=<value>]
+ Various less common options can be defined via this option syntax,
+ which can modify the behaviour of the menu entry and its config
+ symbol. These options are currently possible:
+
+ - "defconfig_list"
+ This declares a list of default entries which can be used when
+ looking for the default configuration (which is used when the main
+ .config doesn't exists yet.)
+
+ - "modules"
+ This declares the symbol to be used as the MODULES symbol, which
+ enables the third modular state for all config symbols.
+
+ - "env"=<value>
+ This imports the environment variable into Kconfig. It behaves like
+ a default, except that the value comes from the environment, this
+ also means that the behaviour when mixing it with normal defaults is
+ undefined at this point. The symbol is currently not exported back
+ to the build environment (if this is desired, it can be done via
+ another symbol).
Menu dependencies
-----------------
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index b6f922c77e0..9d4cba1c001 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -106,7 +106,8 @@ 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 {
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 8a07ee4f6bd..4bc68f20a73 100644
--- a/scripts/kconfig/lkc.h
+++ b/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 char *fmt, ...);
const char *str_get(struct gstr *gs);
/* symbol.c */
+extern 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)
{
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 3637d1057e1..e6ef171e5b1 100644
--- a/scripts/kconfig/menu.c
+++ b/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 *arg)
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;
}
}
diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 9fe27ca8a19..5d0fd38b089 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1088,7 +1088,11 @@ QString ConfigInfoView::debug_info(struct symbol *sym)
debug += "</a><br>";
break;
case P_DEFAULT:
- debug += "default: ";
+ case P_SELECT:
+ case P_RANGE:
+ case P_ENV:
+ debug += prop_get_type_name(prop->type);
+ debug += ": ";
expr_print(prop->expr, expr_print_help, &debug, E_NONE);
debug += "<br>";
break;
@@ -1099,16 +1103,6 @@ QString ConfigInfoView::debug_info(struct symbol *sym)
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);
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index a7dfc82fc85..99e3d02d1cf 100644
--- a/scripts/kconfig/symbol.c
+++ b/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);
@@ -117,6 +119,15 @@ struct property *sym_get_choice_prop(struct symbol *sym)
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;
@@ -346,6 +357,9 @@ 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);
@@ -860,6 +874,8 @@ const char *prop_get_type_name(enum prop_type type)
switch (type) {
case P_PROMPT:
return "prompt";
+ case P_ENV:
+ return "env";
case P_COMMENT:
return "comment";
case P_MENU:
@@ -877,3 +893,32 @@ const char *prop_get_type_name(enum prop_type type)
}
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 from %s",
+ sym2->name);
+ 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", env);
+}
diff --git a/scripts/kconfig/util.c b/scripts/kconfig/util.c
index e1cad924c0a..f8e73c039dc 100644
--- a/scripts/kconfig/util.c
+++ b/scripts/kconfig/util.c
@@ -29,6 +29,8 @@ struct file *file_lookup(const char *name)
/* write a dependency file as used by kbuild to track dependencies */
int file_write_dep(const char *name)
{
+ struct symbol *sym, *env_sym;
+ struct expr *e;
struct file *file;
FILE *out;
@@ -45,8 +47,25 @@ 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$(deps_config)\n\n");
+
+ expr_list_for_each_sym(sym_env_list, e, sym) {
+ struct property *prop;
+ const char *value;
+
+ prop = sym_get_env_prop(sym);
+ env_sym = prop_get_symbol(prop);
+ if (!env_sym)
+ continue;
+ value = getenv(env_sym->name);
+ if (!value)
+ value = "";
+ fprintf(out, "ifneq \"$(%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;
diff --git a/scripts/kconfig/zconf.gperf b/scripts/kconfig/zconf.gperf
index 93538e567bd..4051639c090 100644
--- a/scripts/kconfig/zconf.gperf
+++ b/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
%%
diff --git a/scripts/kconfig/zconf.hash.c_shipped b/scripts/kconfig/zconf.hash.c_shipped
index ab28b18153a..c9d26bc1a21 100644
--- a/scripts/kconfig/zconf.hash.c_shipped
+++ b/scripts/kconfig/zconf.hash.c_shipped
@@ -53,10 +53,10 @@ kconf_id_hash (register const char *str, register unsigned int len)
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, register unsigned int len)
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_id_strings_contents =
"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 *str, register unsigned int len)
{
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 *str, register unsigned int len)
{
{-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 *str, register unsigned int len)
{(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 *str, register unsigned int len)
{-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}
};