On 07/03/2015 at 10:42 AM, Stephen Rasku wrote: > I have a package that depends on `libusb` but it's not detecting that > it's installed. > > # dpkg-query -s libusb > dpkg-query: package 'libusb' is not installed and no information is > available > Use dpkg --info (= dpkg-deb --info) to examine archive files, > and dpkg --contents (= dpkg-deb --contents) to list their contents. This is because there is no package named 'libusb'. > However, if I list all the packages and grep for `libusb` I can find it. > > # dpkg-query -l | grep libusb > dpkg-query -l | grep libusb > ii libusb-0.1-4:amd64 2:0.1.12-25 > amd64 userspace USB programming library > ii libusb-1.0-0:amd64 2:1.0.19-1 > amd64 userspace USB programming library As this shows, the packages you want are named 'libusb-0.1.4:amd64' and 'libusb-1.0-0:amd64'. You need to pass the full package name to your dpkg-query invocation. > What gives? How can I get this to detect these `libusb` libraries? > I have the source for the package I am trying to install so I can modify > the meta-information if that's necessary. > > This is the Depends section of the package I am trying to install: > > Package: my-package > Architecture: any > Depends: ${shlibs:Depends}, ${misc:Depends}, libusb, fxload > Description: <insert up to 60 chars description> You need to use the full package name, not just 'libusb'. In this case, you can (and should) omit the ':amd64' part. So, assuming that either of the two libusb versions will work for your package, what you want is: Package: my-package Architecture: any Depends: ${shlibs:Depends}, ${misc:Depends}, libusb-1.0-0 | libusb-0.1-4, fxload Description: <insert up to 60 chars description> If the two libusb-* packages had a 'Provides: libusb' stanza, you would be able to use the simple 'libusb' package name, but since they don't you can't. -- The Wanderer The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. -- George Bernard Shaw
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