Lpc2000

I'm a beginner in LPC2000 and I'm developing a program for lpc2210. I 
have
these questions:

1) Is newlib the best library option for memory allocation usage?

2) Does anyone have expecience with uclibc or diet libc? what's the 
best?


3) Does memory allocation with newlib need sbrk implementation with 
the
compiler arm-elf-gcc? Does anybody have any examples? Is there any
fragmentation problem?

4) How can I determine my program stack size? I tried avrora and
stacktool, but both are for atmel.