meson: add option for tracing; align messages

meson.build

@@ -37,6 +37,7 @@ add_project_arguments(cpp.get_supported_arguments([
 #
 
 build_tracking = false
+build_tracing = false
 
 v4l2_required = false
 hidapi_required = false
@@ -104,6 +105,12 @@ if get_option('tracking').enabled() or get_option('tracking').auto()
 	build_tracking = opencv.found()
 endif
 
+if get_option('tracing')
+	build_tracing = percetto.found()
+endif
+
+
+
 # TODO: make these behave well when not present
 x11       = dependency('x11', required: get_option('xlib'))
 x11_xcb   = dependency('x11-xcb', required: get_option('xlib'))
@@ -309,6 +316,12 @@ else
 	message('      tracking: no')
 endif
 
+if build_tracing
+	message('       tracing: yes')
+else
+	message('       tracing: no')
+endif
+
 if get_option('steamvr_plugin')
 	message('steamvr plugin: yes')
 else

src/xrt/auxiliary/meson.build

@@ -16,7 +16,7 @@ if libbsd.found() and not get_option('libbsd').disabled()
 	aux_util_deps += libbsd
 endif
 
-if percetto.found()
+if build_tracing
 	aux_util_deps += percetto
 endif
 

src/xrt/include/xrt/meson.build

@@ -119,7 +119,7 @@ if build_wayland_direct
 	have_conf.set('XRT_HAVE_WAYLAND_DIRECT', true)
 endif
 
-if percetto.found()
+if build_tracing
 	have_conf.set('XRT_HAVE_PERCETTO', true)
 endif