To build nesC: in this directory
./configure [--prefix=<where you want to install nesc]
make

To install:
make install

To install a nesC editor mode (currently, emacs, vim, kde):
Read <installdir>/lib/ncc/editor-modes/<your-editor-name>/readme.txt

To use nesC with TinyOS, you need to install the ncc, mig, etc TinyOS
frontends for nesC. These are found in tinyos-1.x/tools/src/ncc (for TinyOS
1.x) and in tinyos-2.x/tools (for TinyOS 2.x). Please follow the
installation directions you find there.

To use nesC with the Atmel AVR processors or the TI MSP processors you
need the avr-gcc and msp430-gcc packages, and the corresponding GNU
binutils (avr-binutils and msp430-binutils respectively). 

You can use the patched versions of these binutils that allow $ in
symbol names, available from http://www.tinyos.net/dist-2.0.0 (check
http://www.tinyos.net/download.html to see if newer versions are
available), or you can pass the -fnesc-separator=__ option to nescc (ncc
if using TinyOS) to use __ rather than $ in generated code. See the
nescc man page for details.