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104daea149
To get access to environment variables, Kconfig needs to define a
symbol using "option env=" syntax. It is tedious to add a symbol entry
for each environment variable given that we need to define much more
such as 'CC', 'AS', 'srctree' etc. to evaluate the compiler capability
in Kconfig.
Adding '$' for symbol references is grammatically inconsistent.
Looking at the code, the symbols prefixed with 'S' are expanded by:
- conf_expand_value()
This is used to expand 'arch/$ARCH/defconfig' and 'defconfig_list'
- sym_expand_string_value()
This is used to expand strings in 'source' and 'mainmenu'
All of them are fixed values independent of user configuration. So,
they can be changed into the direct expansion instead of symbols.
This change makes the code much cleaner. The bounce symbols 'SRCARCH',
'ARCH', 'SUBARCH', 'KERNELVERSION' are gone.
sym_init() hard-coding 'UNAME_RELEASE' is also gone. 'UNAME_RELEASE'
should be replaced with an environment variable.
ARCH_DEFCONFIG is a normal symbol, so it should be simply referenced
without '$' prefix.
The new syntax is addicted by Make. The variable reference needs
parentheses, like $(FOO), but you can omit them for single-letter
variables, like $F. Yet, in Makefiles, people tend to use the
parenthetical form for consistency / clarification.
At this moment, only the environment variable is supported, but I will
extend the concept of 'variable' later on.
The variables are expanded in the lexer so we can simplify the token
handling on the parser side.
For example, the following code works.
[Example code]
config MY_TOOLCHAIN_LIST
string
default "My tools: CC=$(CC), AS=$(AS), CPP=$(CPP)"
[Result]
$ make -s alldefconfig && tail -n 1 .config
CONFIG_MY_TOOLCHAIN_LIST="My tools: CC=gcc, AS=as, CPP=gcc -E"
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
172 lines
4.1 KiB
C
172 lines
4.1 KiB
C
/*
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* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
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* Released under the terms of the GNU GPL v2.0.
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*/
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#ifndef LKC_H
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#define LKC_H
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#include "expr.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "lkc_proto.h"
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#define SRCTREE "srctree"
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#ifndef PACKAGE
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#define PACKAGE "linux"
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#endif
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#ifndef CONFIG_
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#define CONFIG_ "CONFIG_"
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#endif
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static inline const char *CONFIG_prefix(void)
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{
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return getenv( "CONFIG_" ) ?: CONFIG_;
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}
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#undef CONFIG_
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#define CONFIG_ CONFIG_prefix()
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#define TF_COMMAND 0x0001
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#define TF_PARAM 0x0002
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#define TF_OPTION 0x0004
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enum conf_def_mode {
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def_default,
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def_yes,
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def_mod,
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def_no,
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def_random
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};
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#define T_OPT_MODULES 1
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#define T_OPT_DEFCONFIG_LIST 2
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#define T_OPT_ALLNOCONFIG_Y 4
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struct kconf_id {
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const char *name;
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int token;
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unsigned int flags;
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enum symbol_type stype;
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};
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extern int yylineno;
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void zconfdump(FILE *out);
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void zconf_starthelp(void);
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FILE *zconf_fopen(const char *name);
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void zconf_initscan(const char *name);
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void zconf_nextfile(const char *name);
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int zconf_lineno(void);
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const char *zconf_curname(void);
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/* confdata.c */
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const char *conf_get_configname(void);
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const char *conf_get_autoconfig_name(void);
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char *conf_get_default_confname(void);
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void sym_set_change_count(int count);
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void sym_add_change_count(int count);
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bool conf_set_all_new_symbols(enum conf_def_mode mode);
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void set_all_choice_values(struct symbol *csym);
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/* confdata.c and expr.c */
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static inline void xfwrite(const void *str, size_t len, size_t count, FILE *out)
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{
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assert(len != 0);
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if (fwrite(str, len, count, out) != count)
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fprintf(stderr, "Error in writing or end of file.\n");
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}
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/* menu.c */
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void _menu_init(void);
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void menu_warn(struct menu *menu, const char *fmt, ...);
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struct menu *menu_add_menu(void);
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void menu_end_menu(void);
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void menu_add_entry(struct symbol *sym);
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void menu_add_dep(struct expr *dep);
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void menu_add_visibility(struct expr *dep);
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struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep);
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void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep);
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void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep);
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void menu_add_option(int token, char *arg);
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void menu_finalize(struct menu *parent);
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void menu_set_type(int type);
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/* util.c */
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struct file *file_lookup(const char *name);
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int file_write_dep(const char *name);
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void *xmalloc(size_t size);
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void *xcalloc(size_t nmemb, size_t size);
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void *xrealloc(void *p, size_t size);
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char *xstrdup(const char *s);
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char *xstrndup(const char *s, size_t n);
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struct gstr {
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size_t len;
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char *s;
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/*
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* when max_width is not zero long lines in string s (if any) get
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* wrapped not to exceed the max_width value
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*/
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int max_width;
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};
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struct gstr str_new(void);
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void str_free(struct gstr *gs);
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void str_append(struct gstr *gs, const char *s);
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void str_printf(struct gstr *gs, const char *fmt, ...);
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const char *str_get(struct gstr *gs);
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/* symbol.c */
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void sym_clear_all_valid(void);
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struct symbol *sym_choice_default(struct symbol *sym);
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const char *sym_get_string_default(struct symbol *sym);
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struct symbol *sym_check_deps(struct symbol *sym);
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struct property *prop_alloc(enum prop_type type, struct symbol *sym);
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struct symbol *prop_get_symbol(struct property *prop);
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struct property *sym_get_env_prop(struct symbol *sym);
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static inline tristate sym_get_tristate_value(struct symbol *sym)
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{
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return sym->curr.tri;
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}
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static inline struct symbol *sym_get_choice_value(struct symbol *sym)
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{
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return (struct symbol *)sym->curr.val;
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}
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static inline bool sym_set_choice_value(struct symbol *ch, struct symbol *chval)
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{
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return sym_set_tristate_value(chval, yes);
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}
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static inline bool sym_is_choice(struct symbol *sym)
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{
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return sym->flags & SYMBOL_CHOICE ? true : false;
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}
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static inline bool sym_is_choice_value(struct symbol *sym)
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{
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return sym->flags & SYMBOL_CHOICEVAL ? true : false;
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}
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static inline bool sym_is_optional(struct symbol *sym)
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{
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return sym->flags & SYMBOL_OPTIONAL ? true : false;
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}
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static inline bool sym_has_value(struct symbol *sym)
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{
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return sym->flags & SYMBOL_DEF_USER ? true : false;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* LKC_H */
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