no ELF-LIB for firsum needed. to compile you can do a single:
gcc.exe firmsum.c common/binfile.c common/htoi.c common/gdr.c -Icommon -o firsum.exe
and for use it just do:
firsum firmmoded.bin firmsumed.bin
the checksum offset, start offset and end offset parameters are optionals, and no need for sum a 047
