Building Osmocom

Hello, I am a little new to ubuntu and am trying to build osmocom-bb but i am facing some problems in doing so. I found your emial address in the .c files present in the Osmocom-bb folder. I have downloaded the GNU toolchain for ARM which is the first step in building Osmocom. But I am not able to understand the second step in which I have to set a path to include the arm-elf-* executables of the toolchain. Would you please help me on this? Awaiting your response, Zaki.