25/10/2018 23:16, Richardson, Bruce:
> From: Thomas Monjalon [mailto:tho...@monjalon.net]
> > 25/10/2018 22:44, Bruce Richardson:
> > > On Thu, Oct 25, 2018 at 10:41:53PM +0200, Thomas Monjalon wrote:
> > > > 25/10/2018 22:29, Thomas Monjalon:
> > > > > 24/10/2018 18:03, Kevin Laatz:
> > > > > > --- a/lib/librte_telemetry/meson.build
> > > > > > +++ b/lib/librte_telemetry/meson.build
> > > > > > @@ -5,3 +5,5 @@ sources = files('rte_telemetry.c') headers =
> > > > > > files('rte_telemetry.h', 'rte_telemetry_internal.h') deps +=
> > > > > > ['metrics', 'ethdev'] cflags += '-DALLOW_EXPERIMENTAL_API'
> > > > > > +jansson = cc.find_library('jansson', required: true) ext_deps
> > > > > > ++= jansson
> > > > >
> > > > > I just discovered an issue when trying to compile for arm64 (with
> > > > > devtools/test-meson-builds.sh):
> > > > >
> > > > > /usr/lib/gcc/aarch64-linux-gnu/8.2.0/../../../../aarch64-linux-
> > gnu/bin/ld:
> > > > > cannot find -ljansson
> > > > >
> > > > > I am worried because it is a real blocker.
> > > >
> > > > The dependency must be optional.
> > > > Should we disable the library if jansson is not found?
> > > >
> > > Yes, it should be.
> > >
> > > Needs:
> > >
> > > jansson = cc.find_library('jansson', required: false)
> > > build = jansson.found()
> >
> > And for the makefile?
> >
> > It has been introduced (too early) in patch 3:
> > LDLIBS += -ljansson
> > I think we must use pkg-config to check if jansson is found.
>
> I didn't look at the makefile, because you never asked! :-)
The code is already written in examples/power:
https://patches.dpdk.org/patch/46984/
