I have a custom recipe that copies a .so, that libMotors.so calls functions in another libcanfestival.so.

When I first added in the copy of the .so
I didn't have an RDEPENDS and Yocto printed out an warning listing the package that it wanted. I added an RDEPENDS_${PN}
with all of the packages listed, but I'm still getting an error for the first libMotors.so:

ERROR: userconfig-1.0-r0 do_package_qa: QA Issue: /home/sakura/lib/libMotors.so.1.0.0 contained in package userconfig requires libcanfestival.so, but no providers found in RDEPENDS_userconfig? [file-rdeps]

In userdepends I added:

RDEPENDS_${PN} += "canfestival libelf libgcrypt pcsc-lite-lib qtbase qtdeclarative qtserialport zint"

Package canfestival_3-asc in has:

FILES_${PN} = "/usr/lib/libcanfestival.so /usr/lib/libcanfestival_unix.so /usr/lib/libcanfestival_can_socket.so"

which seems to me like it should satisfy the requirements of the RDEPENDS, but it is not. bitbake initially gave me a warning
that listed canfestival as needing to be added to an RDEPENDS for userconfig. But now it is saying that it can't figure out
what package supplies the libcanfestival.so file.

Can someone help me to understand what is going on? How do I explicitly say that a package supplies a given file?