Echelon Neuron - Manual (Page 159)

Example:
The following example advises the Neuron Linker to include the Echelon
provided CENELEC library when linking an application that uses the current
module:
LIBRARY “$STD$\cenelec.lib”
The reference to this library uses the $STD$ macro, which resolves to the
standard location for Neuron C libraries on the machine that performs the
linkage.
Neuron Assembly Language Reference 149