Thanks for reporting your issues on Fedora.

4) We will definitely fix that omission.

5a) liburcu is a dependency of the lttng-ust and lttng-tools. The dependency should be accounted for in the respective Fedora packages.

6) Yes please submit a bug for this at [1]. We will investigate that failure to build on Fedora.

[1] - http://bugs.lttng.org/projects/lttng-modules