Somehow while applying the bb_do_delay patch a change slipped
in libbb.h that broke compilation.
libbb.h Line 355
extern char bb_path_mtab_file[];
This conflicts with mtab_file.c
#if defined(CONFIG_FEATURE_MTAB_SUPPORT)
const char bb_path_mtab_file[] = "/etc/mtab";
#else
const char bb_path_mtab_file[] = "/proc/mounts";
#endif