Solved:
Turns out it's usblib-dev; at least, that's what worked for me.
Wow, that's a pretty old floppy.
The 5-1/4 inch floppy reader that I'm installing in a Trisquel 7 system wants
me to install libusb-0.1.12 in order to compile a suitable linux driver.
Trouble is, sudo apt-get libusb-0.1.12 doesn't get me anywhere, nor does
apropos libusb.
Any suggestions ? There are other libusb-x.y.z's
there is libusb-1.0 but it has a different api
Are any of these relevant?
root@trisquelserver:/usr/share/hplip# apt-cache search libusb
libftdi1 - Library to control and program the FTDI USB controller
libftdipp1 - Library to control and program the FTDI USB controller
libgusb-dev - GLib wrapper around libusb1 - development files
libgusb-doc
