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

Build with newer Boost. From Fedora.

Index: gr-fec/lib/async_decoder_impl.cc
--- gr-fec/lib/async_decoder_impl.cc.orig
+++ gr-fec/lib/async_decoder_impl.cc
@@ -32,6 +32,8 @@
 namespace gr {
 namespace fec {
 
+using namespace boost::placeholders;
+
 async_decoder::sptr
 async_decoder::make(generic_decoder::sptr my_decoder, bool packed, bool rev_pack, int mtu)
 {
