include/linux/kconfig.h

   1 #ifndef __LINUX_KCONFIG_H
   2 #define __LINUX_KCONFIG_H
   3
   4 #include <generated/autoconf.h>
   5
   6 /*
   7  * Helper macros to use CONFIG_ options in C expressions. Note that
   8  * these only work with boolean and tristate options.
   9  */
  10
  11 /*
  12  * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
  13  * 0 otherwise.
  14  *
  15  */
  16 #define IS_ENABLED(option) \
  17         (__enabled_ ## option || __enabled_ ## option ## _MODULE)
  18
  19 /*
  20  * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
  21  * otherwise. For boolean options, this is equivalent to
  22  * IS_ENABLED(CONFIG_FOO).
  23  */
  24 #define IS_BUILTIN(option) __enabled_ ## option
  25
  26 /*
  27  * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
  28  * otherwise.
  29  */
  30 #define IS_MODULE(option) __enabled_ ## option ## _MODULE
  31
  32 #endif /* __LINUX_KCONFIG_H */