I've been hoping that P2 support for PropGCC would happen for a while. However, it seems like this won't happen until silicon is available, so I decided to do it myself -- sort of. :) I looked at the assembler output from the P1 compiler, and the COG version looks very similar to P2 code, except for a few minor details. So I wrote a conversion program call s2p that converts a P1 .s assembler file to a .spin2 file that can be assembled by PNut. The attached zip file contains the s2p.c source file along with an s2p.exe executable file that will run in a command prompt under Windows. s2p.c can be compiled under Linux by typing "gcc s2p.c -o s2p". There is also a c2p.bat file for Windows that will compile a C program to assembly, and then convert it to a .spin2 file. In a command prompt you would just type something like "c2p fibo" to compile fibo.c and create a fibo.spin2 file. This can then be assembled and loaded by PNut.
There are 4 sample programs -- fibo.c, bas.c, dry.c and chess.c. dry.c runs the Dhrystone benchmark program. bas.c is a Basic interpreter. chess.c is my threaded chess program, but only running on a single cog. Moves are entered by typing something like "d2-d4".
At some point I hope to get my P2 assembler updated to the latest instruction set, and then write a loader so everything can be done from the command line.
There is also another file called prefix.spin2 that contains the startup code and several C library functions, such as putchar, getchar, gets and printf. s2p copies this file to the beginning of the output file. Eventually I may implement a simple linker so that only the needed object files will be linked in, unless of course PropGCC becomes available for the P2 first. :)
EDIT: The latest version of the compiler tools is contained in the zip file p2gcc002.zip. See the readme.txt files contained in the release for more information, and also check the latest posts in this thread.