On Linux it installs copy of the system rigctl* binaries with the -wsjtx suffix

[yarda]

$ md5sum rigctl*
1b64c7de65308553f253aea3411faab7  rigctl
68a1e407cee0d47eea5967d5c3483419  rigctlcom
68a1e407cee0d47eea5967d5c3483419  rigctlcom-wsjtx
edd985ea93a84ace34a3d8a0a7145e4b  rigctld
edd985ea93a84ace34a3d8a0a7145e4b  rigctld-wsjtx
1b64c7de65308553f253aea3411faab7  rigctl-wsjtx

Now, if hamlib isn't bundled there is probably no need to copy the system libraries.