Messages in this thread | | | Date | Thu, 10 Jun 2021 22:47:41 +0200 | From | Jiri Olsa <> | Subject | Re: [RFC PATCH] libtraceevent: Increase libtraceevent logging when verbose |
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On Thu, Jun 10, 2021 at 03:59:15PM -0400, Steven Rostedt wrote: > On Thu, 10 Jun 2021 21:08:32 +0200 > Jiri Olsa <jolsa@redhat.com> wrote: > > > Michael did the libtraceevent detection and dynamic linking support: > > https://lore.kernel.org/linux-perf-users/20210428092023.4009-1-mpetlan@redhat.com/ > > > > 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)
so the feature detection just gives out on/off answers, but we can easily put above to perf's makefile
jirka
> > 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 >
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