Just install the python-argparse module. On my Ubuntu system the command is "sudo apt-get install python-argparse"
On a Mac I think the command would be "easy-install argparse", but I don't have a Mac to check this.
Thak you Andrew :-) I've reinstalled brand new Ubuntu on virtual machine. Then installed SDCC from http://sourceforge.net/projects/sdcc/files/sdcc-linux-x86/3.1.0/sdc...
After that sudo make install in Firmware directory gave me success :-) I've got bootloader, it's time to upload it to HM-TRP.
Another question for Andrew: beside "frequency" bootloaders there's file bootloader.hm_trp.hex - what's this for?