Incomplete Version Check
Only the major version is considered when preforming the compatibility check in urt.h.
// check config version compatibility
#if !defined(_URT_CFG_)
# error "invalid µRT configuration file"
#elif (URT_CFG_VERSION_MAJOR != URT_VERSION_MAJOR) || (URT_CFG_VERSION_MAJOR < URT_VERSION_MAJOR)
# error "incompatible µRT configuration file"
#endif