change logging

lib/decode_mac.cc

@@ -21,7 +21,6 @@
 
 #include <gnuradio/io_signature.h>
 #include <boost/crc.hpp>
-#include <boost/format.hpp> 
 #include <iomanip>
 
 using namespace gr::ieee802_11;
@@ -147,8 +146,10 @@ public:
             return;
         }
 
-        mylog(boost::format("encoding: %1% - length: %2% - symbols: %3%") %
-              d_ofdm.encoding % d_frame.psdu_size % d_frame.n_sym);
+        mylog("encoding: {} - length: {} - symbols: {}",
+              d_ofdm.encoding,
+              d_frame.psdu_size,
+              d_frame.n_sym);
 
         // create PDU
         pmt::pmt_t blob = pmt::make_blob(out_bytes + 2, d_frame.psdu_size - 4);