--- /dev/null
+#ifndef __LINUX_KCONFIG_H
+#define __LINUX_KCONFIG_H
+
+#include <generated/autoconf.h>
+
+/*
+ * Helper macros to use CONFIG_ options in C expressions. Note that
+ * these only work with boolean and tristate options.
+ */
+
+/*
+ * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
+ * 0 otherwise.
+ *
+ */
+#define IS_ENABLED(option) \
+ (__enabled_ ## option || __enabled_ ## option ## _MODULE)
+
+/*
+ * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
+ * otherwise. For boolean options, this is equivalent to
+ * IS_ENABLED(CONFIG_FOO).
+ */
+#define IS_BUILTIN(option) __enabled_ ## option
+
+/*
+ * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
+ * otherwise.
+ */
+#define IS_MODULE(option) __enabled_ ## option ## _MODULE
+
+#endif /* __LINUX_KCONFIG_H */
switch (*value) {
case 'n':
- return;
+ break;
case 'm':
suffix = "_MODULE";
/* fall through */
default:
- value = "1";
+ fprintf(fp, "#define %s%s%s 1\n",
+ CONFIG_, sym->name, suffix);
}
- fprintf(fp, "#define %s%s%s %s\n",
- CONFIG_, sym->name, suffix, value);
+ /*
+ * Generate the __enabled_CONFIG_* and
+ * __enabled_CONFIG_*_MODULE macros for use by the
+ * IS_{ENABLED,BUILTIN,MODULE} macros. The _MODULE variant is
+ * generated even for booleans so that the IS_ENABLED() macro
+ * works.
+ */
+ fprintf(fp, "#define __enabled_" CONFIG_ "%s %d\n",
+ sym->name, (*value == 'y'));
+ fprintf(fp, "#define __enabled_" CONFIG_ "%s_MODULE %d\n",
+ sym->name, (*value == 'm'));
break;
}
case S_HEX: {
.print_comment = header_print_comment,
};
-/*
- * Function-style header printer
- *
- * This printer is used to generate the config_is_xxx() function-style macros
- * in `include/generated/autoconf.h'
- */
-static void
-header_function_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
-{
- int val = 0;
- char c;
- char *tmp, *d;
-
- switch (sym->type) {
- case S_BOOLEAN:
- case S_TRISTATE:
- break;
- default:
- return;
- }
- if (*value == 'm')
- val = 2;
- else if (*value == 'y')
- val = 1;
-
- d = strdup(CONFIG_);
- tmp = d;
- while ((c = *d)) {
- *d = tolower(c);
- d++;
- }
-
- fprintf(fp, "#define %sis_", tmp);
- free(tmp);
-
- d = strdup(sym->name);
- tmp = d;
- while ((c = *d)) {
- *d = tolower(c);
- d++;
- }
- fprintf(fp, "%s%s() %d\n", tmp, (val > 1) ? "_module" : "",
- val ? 1 : 0);
- free(tmp);
-}
-
-static struct conf_printer header_function_printer_cb =
-{
- .print_symbol = header_function_print_symbol,
-};
-
-
/*
* Tristate printer
*
conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
- conf_write_symbol(out_h, sym, &header_function_printer_cb, NULL);
}
fclose(out);
fclose(tristate);