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Compiler: programming Telosb sensor on TinyOS

Tool/software: TI C/C++ Compiler

In the Telosb sensor programming using TinyOS, when I do make telosb install, I got this set of errors:
msp430-gcc: error: firmware-support/segger/SEGGER_RTT.c: No such file or directory
msp430-gcc: error: firmware-support/segger/SEGGER_RTT_printf.c: No such file or directory
/opt/tinyos-main/support/make/Makerules:369: recipe for target 'exe' failed
make: *** [exe] Error 1