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.

5 files changed, 11 insertions, 7 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;
     }
diff --git a/host/examples/rfnoc_rx_to_file.cpp b/host/examples/rfnoc_rx_to_file.cpp
index 2211831aa..2d648c10d 100644
--- a/host/examples/rfnoc_rx_to_file.cpp
+++ b/host/examples/rfnoc_rx_to_file.cpp
@@ -21,6 +21,7 @@
 #include <complex>
 #include <csignal>
 #include <fstream>
+#include <functional>
 #include <iostream>
 #include <thread>
 
@@ -419,10 +420,10 @@ int UHD_SAFE_MAIN(int argc, char* argv[])
     if (not vm.count("skip-lo")) {
         // TODO
         // check_locked_sensor(usrp->get_rx_sensor_names(0), "lo_locked",
-        // boost::bind(&uhd::usrp::multi_usrp::get_rx_sensor, usrp, _1, radio_id),
+        // std::bind(&uhd::usrp::multi_usrp::get_rx_sensor, usrp, _1, radio_id),
         // setup_time); if (ref == "external")
         // check_locked_sensor(usrp->get_mboard_sensor_names(0), "ref_locked",
-        // boost::bind(&uhd::usrp::multi_usrp::get_mboard_sensor, usrp, _1, radio_id),
+        // std::bind(&uhd::usrp::multi_usrp::get_mboard_sensor, usrp, _1, radio_id),
         // setup_time);
     }
 
diff --git a/host/examples/test_clock_synch.cpp b/host/examples/test_clock_synch.cpp
index 8556063d7..2acccabdc 100644
--- a/host/examples/test_clock_synch.cpp
+++ b/host/examples/test_clock_synch.cpp
@@ -15,6 +15,7 @@
 #include <boost/format.hpp>
 #include <boost/program_options.hpp>
 #include <chrono>
+#include <functional>
 #include <iostream>
 #include <thread>
 
@@ -118,7 +119,7 @@ int UHD_SAFE_MAIN(int argc, char* argv[])
         boost::thread_group thread_group;
         clock_time = clock->get_time();
         for (size_t j = 0; j < usrp->get_num_mboards(); j++) {
-            thread_group.create_thread(boost::bind(&get_usrp_time, usrp, j, &usrp_times));
+            thread_group.create_thread(std::bind(&get_usrp_time, usrp, j, &usrp_times));
         }
         // Wait for threads to complete
         thread_group.join_all();
diff --git a/host/examples/test_messages.cpp b/host/examples/test_messages.cpp
index fe2293840..637f086f0 100644
--- a/host/examples/test_messages.cpp
+++ b/host/examples/test_messages.cpp
@@ -13,7 +13,7 @@
 #include <uhd/utils/static.hpp>
 #include <uhd/utils/thread.hpp>
 #include <boost/assign/list_of.hpp>
-#include <boost/bind.hpp>
+#include <functional>
 #include <boost/format.hpp>
 #include <boost/program_options.hpp>
 #include <complex>
diff --git a/host/examples/txrx_loopback_to_file.cpp b/host/examples/txrx_loopback_to_file.cpp
index 6199ca429..4c059577c 100644
--- a/host/examples/txrx_loopback_to_file.cpp
+++ b/host/examples/txrx_loopback_to_file.cpp
@@ -20,6 +20,7 @@
 #include <boost/thread/thread.hpp>
 #include <csignal>
 #include <fstream>
+#include <functional>
 #include <iostream>
 
 namespace po = boost::program_options;
@@ -526,7 +527,7 @@ int UHD_SAFE_MAIN(int argc, char* argv[])
 
     // start transmit worker thread
     boost::thread_group transmit_thread;
-    transmit_thread.create_thread(boost::bind(
+    transmit_thread.create_thread(std::bind(
         &transmit_worker, buff, wave_table, tx_stream, md, step, index, num_channels));
 
     // recv to file