text: 
  The following files extend or replace some of the the newlib functionality:
  
  _startup.c: a customised startup sequence, written in C
  
  _exit.c: a customised exit() implementation
  
  _syscalls.c: local versions of the libnosys/librdimon code
  
  _sbrk.c: a custom _sbrk() to match the actual linker scripts
  
  assert.c: implementation for the asserion macros
  
  _cxx.cpp: local versions of some C++ support, to avoid references to 
  	large functions.
  
  