coreboot-kgpe-d16/payloads/libpayload/include/kconfig.h

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#ifndef __KCONFIG_H__
#define __KCONFIG_H__
#include <libpayload-config.h>
/*
* Getting something that works in C and CPP for an arg that may or may
* not be defined is tricky. Here, if we have "#define CONFIG_LP_BOOGER 1"
* we match on the placeholder define, insert the "0," for arg1 and generate
* the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one).
* When CONFIG_LP_BOOGER is not defined, we generate a (... 1, 0) pair, and when
* the last step cherry picks the 2nd arg, we get a zero.
*/
#define __ARG_PLACEHOLDER_1 0,
#define config_enabled(cfg) _config_enabled(cfg)
#define _config_enabled(value) __config_enabled(__ARG_PLACEHOLDER_##value)
#define __config_enabled(arg1_or_junk) ___config_enabled(arg1_or_junk 1, 0, 0)
#define ___config_enabled(__ignored, val, ...) val
#define IS_ENABLED(option) config_enabled(option) /* deprecated */
#define CONFIG(option) config_enabled(CONFIG_##option)
#endif