trace-cmd: Add warning if libtracefs or libtraceevent are not found

Add a warning notice if either or both libtraceevent or libtracefs is not
found on the system for linking. If the local version is being built,
display a notice and show where they can get the corresponding library.

Link: https://lore.kernel.org/linux-trace-devel/20201211171015.035720645@goodmis.org

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
3 files changed