IS_BUILTIN(OPT) | Evaluates to 1 if CONFIG_OPT is set to y and to 0 otherwise. For boolean options, this macro is equivalent to IS_ENABLED(OPT). |
IS_MODULE(OPT) | Evaluates to 1 if CONFIG_OPT is set to m and to 0 otherwise. For boolean options, this macro is equivalent to IS_ENABLED(OPT). |
IS_ENABLED(OPT) | Evaluates to 1 if CONFIG_OPT is set to y or m and to 0 otherwise. For boolean options, this macro is equivalent to IS_ENABLED(OPT). |
IS_REACHABLE(OPT) | EValuates to 1 if the currently compiled code can call a function defined in code compiled based on CONFIG_OPT. Similar to IS_ENABLED() but returns 0 when invoked from built-in code when CONFIG_OPT is set to m. |