$OpenBSD: patch-gr-digital_lib_constellation_receiver_cb_impl_cc,v 1.1 2021/03/18 19:51:44 rsadowski Exp $

Build with newer Boost. From Fedora.

Index: gr-digital/lib/constellation_receiver_cb_impl.cc
--- gr-digital/lib/constellation_receiver_cb_impl.cc.orig
+++ gr-digital/lib/constellation_receiver_cb_impl.cc
@@ -34,6 +34,8 @@
 namespace gr {
 namespace digital {
 
+using namespace boost::placeholders;
+
 #define VERBOSE_MM 0     // Used for debugging symbol timing loop
 #define VERBOSE_COSTAS 0 // Used for debugging phase and frequency tracking
 
