Fix compilation error: '_1' was not declared in this scope

Change-Id: I0f1f2df817a65f7d5b72c5280451346a0a011d47
diff --git a/lib/misc_utils/burst_file_sink_impl.cc b/lib/misc_utils/burst_file_sink_impl.cc
index 9990d86..ddcd583 100644
--- a/lib/misc_utils/burst_file_sink_impl.cc
+++ b/lib/misc_utils/burst_file_sink_impl.cc
@@ -48,7 +48,7 @@
               d_output_file(filename.c_str(), std::ofstream::binary)
     {
         message_port_register_in(pmt::mp("in"));
-        set_msg_handler(pmt::mp("in"), boost::bind(&burst_file_sink_impl::process_burst, this, _1));
+        set_msg_handler(pmt::mp("in"), boost::bind(&burst_file_sink_impl::process_burst, this, boost::placeholders::_1));
     }
 
     /*
diff --git a/lib/misc_utils/burst_to_fn_time_impl.cc b/lib/misc_utils/burst_to_fn_time_impl.cc
index 3e587f0..6f6c1de 100644
--- a/lib/misc_utils/burst_to_fn_time_impl.cc
+++ b/lib/misc_utils/burst_to_fn_time_impl.cc
@@ -52,7 +52,7 @@
 
         // Bind a port handler
         set_msg_handler(pmt::mp("bursts_in"),
-          boost::bind(&burst_to_fn_time_impl::handle_burst, this, _1));
+          boost::bind(&burst_to_fn_time_impl::handle_burst, this, boost::placeholders::_1));
     }
 
     /*
diff --git a/lib/misc_utils/bursts_printer_impl.cc b/lib/misc_utils/bursts_printer_impl.cc
index ab9c319..fbd9bd3 100644
--- a/lib/misc_utils/bursts_printer_impl.cc
+++ b/lib/misc_utils/bursts_printer_impl.cc
@@ -155,7 +155,7 @@
         d_ignore_dummy_bursts = ignore_dummy_bursts;
 
         message_port_register_in(pmt::mp("bursts"));
-        set_msg_handler(pmt::mp("bursts"), boost::bind(&bursts_printer_impl::bursts_print, this, _1));
+        set_msg_handler(pmt::mp("bursts"), boost::bind(&bursts_printer_impl::bursts_print, this, boost::placeholders::_1));
     }
 
     /*
diff --git a/lib/misc_utils/collect_system_info_impl.cc b/lib/misc_utils/collect_system_info_impl.cc
index 072734a..6ab982e 100644
--- a/lib/misc_utils/collect_system_info_impl.cc
+++ b/lib/misc_utils/collect_system_info_impl.cc
@@ -172,7 +172,7 @@
               gr::io_signature::make(0, 0, 0))
     {
         message_port_register_in(pmt::mp("msgs"));
-        set_msg_handler(pmt::mp("msgs"), boost::bind(&collect_system_info_impl::process_messages, this, _1));
+        set_msg_handler(pmt::mp("msgs"), boost::bind(&collect_system_info_impl::process_messages, this, boost::placeholders::_1));
     }
     
     /*
diff --git a/lib/misc_utils/extract_assignment_cmd_impl.cc b/lib/misc_utils/extract_assignment_cmd_impl.cc
index e4aa319..fe75f21 100644
--- a/lib/misc_utils/extract_assignment_cmd_impl.cc
+++ b/lib/misc_utils/extract_assignment_cmd_impl.cc
@@ -70,7 +70,7 @@
               gr::io_signature::make(0, 0, 0))
     {
         message_port_register_in(pmt::mp("msgs"));
-        set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_assignment_cmd_impl::process_messages, this, _1));
+        set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_assignment_cmd_impl::process_messages, this, boost::placeholders::_1));
     }
     
     /*
diff --git a/lib/misc_utils/extract_cmc_impl.cc b/lib/misc_utils/extract_cmc_impl.cc
index 04b0afc..c313b58 100644
--- a/lib/misc_utils/extract_cmc_impl.cc
+++ b/lib/misc_utils/extract_cmc_impl.cc
@@ -83,7 +83,7 @@
               gr::io_signature::make(0, 0, 0))
     {
         message_port_register_in(pmt::mp("msgs"));
-        set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_cmc_impl::process_messages, this, _1));
+        set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_cmc_impl::process_messages, this, boost::placeholders::_1));
     }
     
     /*
diff --git a/lib/misc_utils/extract_immediate_assignment_impl.cc b/lib/misc_utils/extract_immediate_assignment_impl.cc
index a6d1658..579fe61 100644
--- a/lib/misc_utils/extract_immediate_assignment_impl.cc
+++ b/lib/misc_utils/extract_immediate_assignment_impl.cc
@@ -332,7 +332,7 @@
         d_ignore_gprs = ignore_gprs;
         d_unique_references = unique_references;
         message_port_register_in(pmt::mp("msgs"));
-        set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_immediate_assignment_impl::process_message, this, _1));
+        set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_immediate_assignment_impl::process_message, this, boost::placeholders::_1));
     }
 
     /*
diff --git a/lib/misc_utils/extract_system_info_impl.cc b/lib/misc_utils/extract_system_info_impl.cc
index ad7adb8..3fef7d3 100644
--- a/lib/misc_utils/extract_system_info_impl.cc
+++ b/lib/misc_utils/extract_system_info_impl.cc
@@ -304,9 +304,9 @@
               after_reset(false)
     {
         message_port_register_in(pmt::mp("bursts"));
-        set_msg_handler(pmt::mp("bursts"), boost::bind(&extract_system_info_impl::process_bursts, this, _1));
+        set_msg_handler(pmt::mp("bursts"), boost::bind(&extract_system_info_impl::process_bursts, this, boost::placeholders::_1));
         message_port_register_in(pmt::mp("msgs"));
-        set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_system_info_impl::process_sysinfo, this, _1));
+        set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_system_info_impl::process_sysinfo, this, boost::placeholders::_1));
     }
     
     /*
diff --git a/lib/misc_utils/message_file_sink_impl.cc b/lib/misc_utils/message_file_sink_impl.cc
index 7857e6b..3f42d21 100644
--- a/lib/misc_utils/message_file_sink_impl.cc
+++ b/lib/misc_utils/message_file_sink_impl.cc
@@ -48,7 +48,7 @@
               d_output_file(filename.c_str(), std::ofstream::binary)
     {
         message_port_register_in(pmt::mp("in"));
-        set_msg_handler(pmt::mp("in"), boost::bind(&message_file_sink_impl::process_message, this, _1));
+        set_msg_handler(pmt::mp("in"), boost::bind(&message_file_sink_impl::process_message, this, boost::placeholders::_1));
     }
 
     /*
diff --git a/lib/misc_utils/message_printer_impl.cc b/lib/misc_utils/message_printer_impl.cc
index 8342946..200888a 100644
--- a/lib/misc_utils/message_printer_impl.cc
+++ b/lib/misc_utils/message_printer_impl.cc
@@ -108,7 +108,7 @@
         d_prepend_frame_count = prepend_frame_count;
         d_print_gsmtap_header = print_gsmtap_header;
         message_port_register_in(pmt::mp("msgs"));
-        set_msg_handler(pmt::mp("msgs"), boost::bind(&message_printer_impl::message_print, this, _1));
+        set_msg_handler(pmt::mp("msgs"), boost::bind(&message_printer_impl::message_print, this, boost::placeholders::_1));
     }
 
     /*
diff --git a/lib/misc_utils/msg_to_tag_impl.cc b/lib/misc_utils/msg_to_tag_impl.cc
index e08c7e6..e145b77 100644
--- a/lib/misc_utils/msg_to_tag_impl.cc
+++ b/lib/misc_utils/msg_to_tag_impl.cc
@@ -57,7 +57,7 @@
               gr::io_signature::make(1, 1, sizeof(gr_complex)))              
     {
       message_port_register_in(pmt::mp("msg"));
-      set_msg_handler(pmt::mp("msg"), boost::bind(&msg_to_tag_impl::queue_msg, this, _1));
+      set_msg_handler(pmt::mp("msg"), boost::bind(&msg_to_tag_impl::queue_msg, this, boost::placeholders::_1));
     }
 
     /*
diff --git a/lib/misc_utils/tmsi_dumper_impl.cc b/lib/misc_utils/tmsi_dumper_impl.cc
index 043d935..3809eee 100644
--- a/lib/misc_utils/tmsi_dumper_impl.cc
+++ b/lib/misc_utils/tmsi_dumper_impl.cc
@@ -217,7 +217,7 @@
 {
     dump_file.open("tmsicount.txt", std::ios_base::app);
     message_port_register_in(pmt::mp("msgs"));
-    set_msg_handler(pmt::mp("msgs"), boost::bind(&tmsi_dumper_impl::dump_tmsi, this, _1));
+    set_msg_handler(pmt::mp("msgs"), boost::bind(&tmsi_dumper_impl::dump_tmsi, this, boost::placeholders::_1));
 }
 
 /*