On Wed,  9 Jun 2021 23:06:43 -0700
Ian Rogers [off-list ref] wrote:

libtraceevent has added more levels of debug printout and with changes
like:
https://lore.kernel.org/linux-trace-devel/20210507095022.1079364-3-tz.stoyanov@gmail.com
previously generated output like "registering plugin" is no longer
displayed. This change makes it so that if perf's verbose debug output
is enabled then the debug and info libtraceevent messages can be
displayed.
As this API isn't present in the deprecated tools version of
libtracevent I'm uploading this as an RFC.

Thanks Ian,

We need to start porting perf to using the upstream libtraceevent
library. I think the best way to do that is what we did with trace-cmd.
That is to have the make files check if the minimum version of
libtraceevent is installed, and if so, use that instead of the local
version. If it is not installed, produce a message encouraging the
developer to install the upstream libtraceevent and warn that it will
be using a deprecated older versino, then build the deprecated local
version. After some time, we could simply remove it and make it a
dependency, but I want to do that when all the main distros being used
have it.

Currently its in the latest Debian, Ubuntu, and Fedora. I also believe
its in SUSE but have not checked. It's in Fedora 34, but it doesn't
appear to be in Fedora 33. As that's not too old, I don't think we
should make it a dependency as of yet.

-- Steve