uhd: Replace all occurrences of boost::bind with std::bind

Note: Replacing everything with a lambda would be even better, but that
can't be easily scripted so we'll do this as a first step to reduce the
Boost footprint.

This also removes occurences of #include <boost/bind.hpp>, and makes
sure all usages of std::bind have an #include <functional>. clang-format
wasn't always applied to minimize the changeset in this commit, however,
it was applied to the blocks of #includes.

Due to conflicts with other Boost libraries, the placeholders _1, _2,
etc. could not be directly used, but had to be explicitly called out
(as std::placeholders::_1, etc.). This makes the use of std::bind even
uglier, which serves as another reminder that using std::bind (and even
more so, boost::bind) should be avoided.

nirio/rpc/rpc_client.cpp still contains a reference to boost::bind. It
was not possible to remove it by simply doing a search and replace, so
it will be removed in a separate commit.

1 files changed, 3 insertions, 2 deletions

diff --git a/host/examples/network_relay.cpp b/host/examples/network_relay.cpp
index 6de268aa9..15c6de4ef 100644
--- a/host/examples/network_relay.cpp
+++ b/host/examples/network_relay.cpp
@@ -15,6 +15,7 @@
 #include <chrono>
 #include <csignal>
 #include <cstdlib>
+#include <functional>
 #include <iostream>
 #include <thread>
 #include <vector>
@@ -101,10 +102,10 @@ public:
         boost::unique_lock<boost::mutex> lock(
             spawn_mutex); // lock in preparation to wait for threads to spawn
         (void)_thread_group.create_thread(
-            boost::bind(&udp_relay_type::server_thread, this));
+            std::bind(&udp_relay_type::server_thread, this));
         wait_for_thread.wait(lock); // wait for thread to spin up
         (void)_thread_group.create_thread(
-            boost::bind(&udp_relay_type::client_thread, this));
+            std::bind(&udp_relay_type::client_thread, this));
         wait_for_thread.wait(lock); // wait for thread to spin up
         std::cout << "    done!" << std::endl << std::endl;
     }