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-rw-r--r--src/include/kconfig.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/src/include/kconfig.h b/src/include/kconfig.h
new file mode 100644
index 0000000000..73106e905c
--- /dev/null
+++ b/src/include/kconfig.h
@@ -0,0 +1,21 @@
+#ifndef __KCONFIG_H__
+#define __KCONFIG_H__
+
+#include <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