Re: [RFC PATCH] libtraceevent: Increase libtraceevent logging when verbose

Steven Rostedt <[email protected]> Thu, 10 Jun 2021 15:59:15 -0400

Newsgroups	org.kernel.vger.linux-trace-users,org.kernel.vger.linux-kernel,org.kernel.vger.linux-perf-users
Message-ID	<[email protected]>

On Thu, 10 Jun 2021 21:08:32 +0200
Jiri Olsa <[email protected]> wrote:

> Michael did the libtraceevent detection and dynamic linking support:
>   https://lore.kernel.org/linux-perf-users/[email protected]/
> 
> I think we should have that in Fedora/RHEL rpms already, or it's on the way.
> 
> The detection code could be change to contain things we need.

Or it can also be changed to export the version too?

LIBTRACEEVENT_VERSION = $(shell pkg-config --modversion libtraceevent | perl -e '$ver=<>; @v=split /,/,$ver; printf "%d\n", $v[0] * 255 * 255 | $v[1] * 255 | $v[2];')

-DLIBTRACEFS_VERSION=$(LIBTRACEEVENT_VERSION)

Then in C have:

#define VERSION(a,b,c) ((a)*255*255|(b)*255|(c))

#if LIBTRACEEVENT_VERSION >= VERSION(1,2,3)

To test if the libtraceevent feature is available?

-- Steve