CompileFlags:
  Add:
  - -DPSTR(x)=((const char*)(x))
  - -DPROGMEM=
  - -DF(x)=((const __FlashStringHelper*)(x))
  - -D__FlashStringHelper=char
  Remove:
    - -fipa-pta
    - -mlongcalls
    - -free
    - -mtext-section-literals
    - -fstrict-volatile-bitfields
    - -fno-tree-switch-conversion

