XXX push upstream

Index: meson.build
--- meson.build.orig
+++ meson.build
@@ -93,7 +93,11 @@ endif
 have_avahi = avahi_glib.found() and avahi_client.found()
 
 libmath = cc.find_library('m', required: false)
-libdl = cc.find_library('dl')
+if build_machine.system() == 'openbsd'
+  libdl = []
+else
+  libdl = cc.find_library('dl')
+endif
 
 if get_option('man')
   a2x = find_program('a2x')