Guest code for GNATbus uart example
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This example is available on leon-elf, leon3-elf, erc32-elf, p55-elf and
ppc-elf.

1) Compiling the example.

   To compile, simply invoke gprbuild:

   - For ppc-elf
      gprbuild --target=powerpc-elf -Pguest_uart.gpr -XTARGET=ppc-elf
         --RTS=ravenscar-full-prep

   - For p55-elf
      gprbuild --target=powerpc-eabispe -Pguest_uart.gpr -XTARGET=p55-elf
         --RTS=ravenscar-full-p2020

   - For the others targets
      gprbuild --target=<target> --RTS=ravenscar-full-<target>
         -Pguest_uart.gpr -XTARGET=<target>

2) Running the example.
   <target>-gnatemu --gnatbus=localhost:8032 guest_uart
