checking for main in -lusb... no
configure: error: "libusb not found. please install it"
lucy:/tmp/libg15-1.2.7 # zypper in libusb
Loading repository data...
Reading installed packages...
'libusb-0_1-4' providing 'libusb' is already installed.
Resolving package dependencies...
Nothing to do.
I don't know what distribution you are using, but usually there are two kind of packages for libraries: binary libraries (to be used by programs) and development file (to be used to compile program which will uses the library).
So I think you should check and install libusb-dev package