Ronald G. Minnich (rminnich@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2036
-gerrit
commit afcb7ec4511767839455cf9c20ddf4c2be161a80 Author: Stefan Reinauer reinauer@chromium.org Date: Fri Dec 14 13:06:49 2012 -0800
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 reinauer@google.com --- payloads/libpayload/include/kconfig.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/payloads/libpayload/include/kconfig.h b/payloads/libpayload/include/kconfig.h new file mode 100644 index 0000000..3d7d768 --- /dev/null +++ b/payloads/libpayload/include/kconfig.h @@ -0,0 +1,21 @@ +#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_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
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Ronald G. Minnich