1 #ifndef __LINUX_KCONFIG_WRAPPER_H
2 #define __LINUX_KCONFIG_WRAPPER_H
4 #include <linux/version.h>
6 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
7 #define CONFIG_NET_IPGRE_DEMUX 1
10 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
11 #include_next <linux/kconfig.h>
17 * Helper macros to use CONFIG_ options in C/CPP expressions. Note that
18 * these only work with boolean and tristate options.
22 * Getting something that works in C and CPP for an arg that may or may
23 * not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1"
24 * we match on the placeholder define, insert the "0," for arg1 and generate
25 * the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one).
26 * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when
27 * the last step cherry picks the 2nd arg, we get a zero.
29 #define __ARG_PLACEHOLDER_1 0,
30 #define config_enabled(cfg) _config_enabled(cfg)
31 #define _config_enabled(value) __config_enabled(__ARG_PLACEHOLDER_##value)
32 #define __config_enabled(arg1_or_junk) ___config_enabled(arg1_or_junk 1, 0)
33 #define ___config_enabled(__ignored, val, ...) val
36 * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
40 #define IS_ENABLED(option) \
41 (config_enabled(option) || config_enabled(option##_MODULE))
44 * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
45 * otherwise. For boolean options, this is equivalent to
46 * IS_ENABLED(CONFIG_FOO).
48 #define IS_BUILTIN(option) config_enabled(option)
51 * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
54 #define IS_MODULE(option) config_enabled(option##_MODULE)
56 #endif /* IS_ENABLED */
57 #endif /* __LINUX_KCONFIG_WRAPER_H */