From 9f0431726353a5eaa259776ab43e57163b74605e Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Fri, 14 Dec 2012 13:06:49 -0800 Subject: libpayload: add kconfig.h This implements the linux kernel's macros to handle boolean CONFIG_ variables more easily. Change-Id: I595f9db652d019fe72e231111258ec609bec9d4e Signed-off-by: Stefan Reinauer Reviewed-on: http://review.coreboot.org/2036 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich --- payloads/libpayload/include/kconfig.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 payloads/libpayload/include/kconfig.h (limited to 'payloads/libpayload/include/kconfig.h') diff --git a/payloads/libpayload/include/kconfig.h b/payloads/libpayload/include/kconfig.h new file mode 100644 index 0000000000..3d7d768f9c --- /dev/null +++ b/payloads/libpayload/include/kconfig.h @@ -0,0 +1,21 @@ +#ifndef __KCONFIG_H__ +#define __KCONFIG_H__ + +#include + +/* + * 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_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_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) +#endif -- cgit v1.2.3