> Am I correct to assume that if I drag in the x86_64 libraries I need
> from another x86_64 system, put them in a local directory and then
> reference then using the -XR option I can make this setup work?
-XR is for pointing the compiler/linker to the top of a complete sysroot (i.e., a hierarchy with /lib, /usr/lib etc), not to a directory with just few handpicked libraries. For the latter, use the -Fl command line switch instead, possibly combined with -Xd (to prevent the compiler from passing the default system directories as search paths to the linker).