While the number of embedded systems is continuously increasing, securing software against physical attacks is costly and error-prone. Several works proposed solutions that automatically insert protections against these attacks in order to reduce this cost and this risk of error. In this chapter, we present a survey of existing approaches and classify them by the level at which they apply the countermeasure. We consider three different levels: the source code level, the compilation level, and the assembly/binary level. We explain the advantages and disadvantages of each level considering different criteria. Finally, we encourage future works to take compilation into account when designing tools, to consider the problem of combining countermeasures, as well as the interactions between countermeasures and compiler optimisations. Going one step further, we encourage future works to imagine how compilation could be modified or redesigned to optimise both performance and security.