CMake Error at cmake/FindDataChannel.cmake:8 (find_package):
By not providing "Findlibdatachannel.cmake" in CMAKE_MODULE_PATH this
project has asked CMake to find a package configuration file provided by
"libdatachannel", but CMake did not find one.
Could not find a package configuration file provided by "libdatachannel"
with any of the following names:
libdatachannelConfig.cmake
libdatachannel-config.cmake
Add the installation prefix of "libdatachannel" to CMAKE_PREFIX_PATH or set
"libdatachannel_DIR" to a directory containing one of the above files. If
"libdatachannel" provides a separate development package or SDK, be sure it
has been installed.
I have an impression, that it’s case-sensitive, so you should probably do find_package(LibDataChannel REQUIRED).
For the first question:
You either need to add all of those to CMAKE_PREFIX_PATH (it’s a semicolon-separated list),
or re-organize those prebuilds. I tend to install all my prebuilds into the same directory hierarchy, so I typically have only one prefix to care about.