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While previous compiler research indicates that significant improvements in energy efficiency may be possible if properly optimized code is used, the energy constraints under which a given application code should be optimized may not always be available at compile-time. More importantly, these constraints may change dynamically during the course of execution. In this work, we present a dynamic recompilation/linking framework using which the energy behavior of a given application can be optimized while the application is being executed. Our preliminary experiments indicate that large energy gains are possible through dynamic code recompilation/linking at the expense of a relatively small increase in execution time.