mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
9ced3bddec
Now, we got a basic ability to test compiler capability in Kconfig. config CC_HAS_STACKPROTECTOR def_bool $(shell,($(CC) -Werror -fstack-protector -E -x c /dev/null -o /dev/null 2>/dev/null) && echo y || echo n) This works, but it is ugly to repeat this long boilerplate. We want to describe like this: config CC_HAS_STACKPROTECTOR bool default $(cc-option,-fstack-protector) It is straight-forward to add a new function, but I do not like to hard-code specialized functions like that. Hence, here is another feature, user-defined function. This works as a textual shorthand with parameterization. A user-defined function is defined by using the = operator, and can be referenced in the same way as built-in functions. A user-defined function in Make is referenced like $(call my-func,arg1,arg2), but I omitted the 'call' to make the syntax shorter. The definition of a user-defined function contains $(1), $(2), etc. in its body to reference the parameters. It is grammatically valid to pass more or fewer arguments when calling it. We already exploit this feature in our makefiles; scripts/Kbuild.include defines cc-option which takes two arguments at most, but most of the callers pass only one argument. By the way, a variable is supported as a subset of this feature since a variable is "a user-defined function with zero argument". In this context, I mean "variable" as recursively expanded variable. I will add a different flavored variable in the next commit. The code above can be written as follows: [Example Code] success = $(shell,($(1)) >/dev/null 2>&1 && echo y || echo n) cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) config CC_HAS_STACKPROTECTOR def_bool $(cc-option,-fstack-protector) [Result] $ make -s alldefconfig && tail -n 1 .config CONFIG_CC_HAS_STACKPROTECTOR=y Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
60 lines
2.4 KiB
C
60 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#include <stdarg.h>
|
|
|
|
/* confdata.c */
|
|
void conf_parse(const char *name);
|
|
int conf_read(const char *name);
|
|
int conf_read_simple(const char *name, int);
|
|
int conf_write_defconfig(const char *name);
|
|
int conf_write(const char *name);
|
|
int conf_write_autoconf(void);
|
|
bool conf_get_changed(void);
|
|
void conf_set_changed_callback(void (*fn)(void));
|
|
void conf_set_message_callback(void (*fn)(const char *fmt, va_list ap));
|
|
|
|
/* menu.c */
|
|
extern struct menu rootmenu;
|
|
|
|
bool menu_is_empty(struct menu *menu);
|
|
bool menu_is_visible(struct menu *menu);
|
|
bool menu_has_prompt(struct menu *menu);
|
|
const char * menu_get_prompt(struct menu *menu);
|
|
struct menu * menu_get_root_menu(struct menu *menu);
|
|
struct menu * menu_get_parent_menu(struct menu *menu);
|
|
bool menu_has_help(struct menu *menu);
|
|
const char * menu_get_help(struct menu *menu);
|
|
struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head);
|
|
void menu_get_ext_help(struct menu *menu, struct gstr *help);
|
|
|
|
/* symbol.c */
|
|
extern struct symbol * symbol_hash[SYMBOL_HASHSIZE];
|
|
|
|
struct symbol * sym_lookup(const char *name, int flags);
|
|
struct symbol * sym_find(const char *name);
|
|
const char * sym_escape_string_value(const char *in);
|
|
struct symbol ** sym_re_search(const char *pattern);
|
|
const char * sym_type_name(enum symbol_type type);
|
|
void sym_calc_value(struct symbol *sym);
|
|
enum symbol_type sym_get_type(struct symbol *sym);
|
|
bool sym_tristate_within_range(struct symbol *sym,tristate tri);
|
|
bool sym_set_tristate_value(struct symbol *sym,tristate tri);
|
|
tristate sym_toggle_tristate_value(struct symbol *sym);
|
|
bool sym_string_valid(struct symbol *sym, const char *newval);
|
|
bool sym_string_within_range(struct symbol *sym, const char *str);
|
|
bool sym_set_string_value(struct symbol *sym, const char *newval);
|
|
bool sym_is_changable(struct symbol *sym);
|
|
struct property * sym_get_choice_prop(struct symbol *sym);
|
|
const char * sym_get_string_value(struct symbol *sym);
|
|
|
|
const char * prop_get_type_name(enum prop_type type);
|
|
|
|
/* preprocess.c */
|
|
void env_write_dep(FILE *f, const char *auto_conf_name);
|
|
void variable_add(const char *name, const char *value);
|
|
void variable_all_del(void);
|
|
char *expand_string(const char *in);
|
|
char *expand_dollar(const char **str);
|
|
char *expand_one_token(const char **str);
|
|
|
|
/* expr.c */
|
|
void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *), void *data, int prevtoken);
|