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## 4.5.6 Environment Variables

The PIC14 port recognizes the following environment variables:

SDCC_PIC14_SPLIT_LOCALS
  If set and not empty, sdcc will allocate each temporary register (the ones called r0xNNNN) in a section of its own. By default (if this variable is unset), sdcc tries to cluster registers in sections in order to reduce the BANKSEL overhead when accessing them.