Steps for porting Newlib to a new Target processor without any OS

[Sriharsha <sriharsha dot v at redpinesignals dot com>]

Hello Everyone,
   we have a new 16-bit processor for which GCC 3.2 is ported as a 
cross compiler. Now, I want to port Newlib also, as the default C 
library for gcc. I tried following the steps described in the newlib 
site (http://sources.redhat.com/newlib) for porting newlib to a new 
processor, but I feel that those steps are insufficient. The following 
are the questions I have. I'd be glad if anyone can take time to answer 
them. I tried searching the archieves, but couldnt get all the answers.

1. Our processor does'nt yet have an OS, so no system calls are available.
2. Our processor does not support IEEE floating point numbers (and their 
arithmetic ofcourse), but supports real numbers in Q.15 format. So, can 
I modify the floating point functions to deal with Q.15 numbers?
3. I want to port only the non-OS dependent part of the library (and 
preferably math library using Q.15 format for real numbers). Is this 
possible?
4. I also want some standard functions like printf use specific hardware 
(like serial port) for I/O. Where and how do I change this?
5. Last but not the least, I tried adding my processor name to 
configure.host in newlib1.13.0/newlib/ directory, but it is not 
recognizing my processor.

Thank you for your time and patience.

Warm regards,
Sriharsha Vedurmudi.