libcamera: Add tracing to meson summary

The meson option summary currently does not report if the support
for tracing is enabled or not. Add it.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

meson.build

@@ -172,6 +172,7 @@ py_mod.find_installation('python3', modules: py_modules)
 summary({
             'Enabled pipelines': pipelines,
             'Enabled IPA modules': ipa_modules,
+            'Tracing support': tracing_enabled,
             'Android support': android_enabled,
             'GStreamer support': gst_enabled,
             'V4L2 emulation support': v4l2_enabled,

src/libcamera/meson.build

@@ -70,8 +70,11 @@ if libgnutls.found()
 endif
 
 if liblttng.found()
+    tracing_enabled = true
     config_h.set('HAVE_TRACING', 1)
     libcamera_sources += files(['tracepoints.cpp'])
+else
+    tracing_enabled = false
 endif
 
 if libudev.found()