CMake unable to find Boost::Context when built on CentOS 7

FindBoost.cmake is always unable to find Boost::context (whether pulled in by coroutine or specified manually with Boost::context). This is with the included (old) GCC, a recent checkout from Git (9.0) or the GCC version included with devtoolset-7. It appears in CMakeCache.txt, along with all the other Boost libraries. The only way I can get it found is by installing version 1.53.0 via yum (boost, boost-devel & boost-static), howver in this case the linker doesn't find it (/bin/ld: cannot find -lBoost::context). Any ideas?

Thanks, Dave.