From 98bfb7d801f71e0f9a60fb3982caaeaace4f5baf Mon Sep 17 00:00:00 2001
From: Javier Arribas <javiarribas@gmail.com>
Date: Wed, 6 Apr 2016 16:27:47 +0200
Subject: [PATCH] Removing more unused parameters warnings using the
 __attribute__((unused)) pre-compiler directive

---
 .../PVT/gnuradio_blocks/galileo_e1_pvt_cc.cc     |  9 ++-------
 .../PVT/gnuradio_blocks/gps_l1_ca_pvt_cc.cc      | 11 +++--------
 .../PVT/gnuradio_blocks/hybrid_pvt_cc.cc         |  9 ++-------
 ...ileo_e5a_noncoherent_iq_acquisition_caf_cc.cc |  3 +--
 .../galileo_pcps_8ms_acquisition_cc.cc           |  3 +--
 .../gnuradio_blocks/pcps_acquisition_cc.cc       |  3 +--
 .../pcps_acquisition_fine_doppler_cc.cc          |  3 +--
 .../gnuradio_blocks/pcps_acquisition_sc.cc       |  3 +--
 .../pcps_assisted_acquisition_cc.cc              |  3 +--
 .../pcps_cccwsr_acquisition_cc.cc                |  3 +--
 .../pcps_multithread_acquisition_cc.cc           |  3 +--
 .../pcps_opencl_acquisition_cc.cc                |  3 +--
 .../pcps_quicksync_acquisition_cc.cc             |  3 +--
 .../gnuradio_blocks/pcps_tong_acquisition_cc.cc  |  3 +--
 .../gnuradio_blocks/signal_generator_c.cc        | 11 +++--------
 .../galileo_e1b_telemetry_decoder_cc.cc          |  7 ++-----
 .../galileo_e5a_telemetry_decoder_cc.cc          | 16 +---------------
 .../gps_l1_ca_telemetry_decoder_cc.cc            |  8 ++------
 .../gps_l2_m_telemetry_decoder_cc.cc             | 13 +++++--------
 .../sbas_l1_telemetry_decoder_cc.cc              |  8 ++------
 20 files changed, 33 insertions(+), 92 deletions(-)

diff --git a/src/algorithms/PVT/gnuradio_blocks/galileo_e1_pvt_cc.cc b/src/algorithms/PVT/gnuradio_blocks/galileo_e1_pvt_cc.cc
index 7ae114171..d5b04be9b 100644
--- a/src/algorithms/PVT/gnuradio_blocks/galileo_e1_pvt_cc.cc
+++ b/src/algorithms/PVT/gnuradio_blocks/galileo_e1_pvt_cc.cc
@@ -135,8 +135,8 @@ bool galileo_e1_pvt_cc::pseudoranges_pairCompare_min(const std::pair<int,Gnss_Sy
 
 
 
-int galileo_e1_pvt_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
-        gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items)
+int galileo_e1_pvt_cc::general_work (int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
+        gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items  __attribute__((unused)))
 {
     d_sample_counter++;
 
@@ -344,11 +344,6 @@ int galileo_e1_pvt_cc::general_work (int noutput_items, gr_vector_int &ninput_it
         }
 
     consume_each(1); //one by one
-    output_items.clear();  // removes a warning
-    if((noutput_items == 0) || (ninput_items[0] == 0))
-        {
-            LOG(WARNING) << "noutput_items = 0";
-        }
     return 1;
 }
 
diff --git a/src/algorithms/PVT/gnuradio_blocks/gps_l1_ca_pvt_cc.cc b/src/algorithms/PVT/gnuradio_blocks/gps_l1_ca_pvt_cc.cc
index c93e59c13..899d25637 100644
--- a/src/algorithms/PVT/gnuradio_blocks/gps_l1_ca_pvt_cc.cc
+++ b/src/algorithms/PVT/gnuradio_blocks/gps_l1_ca_pvt_cc.cc
@@ -153,8 +153,8 @@ bool pseudoranges_pairCompare_min(const std::pair<int,Gnss_Synchro>& a, const st
 
 
 
-int gps_l1_ca_pvt_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
-        gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items)
+int gps_l1_ca_pvt_cc::general_work (int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
+        gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items __attribute__((unused)))
 {
     d_sample_counter++;
 
@@ -381,7 +381,7 @@ int gps_l1_ca_pvt_cc::general_work (int noutput_items, gr_vector_int &ninput_ite
                                     d_dump_file.write((char*)&d_rx_time, sizeof(double));
                                 }
                     }
-                    catch (std::ifstream::failure e)
+                    catch (const std::ifstream::failure & e)
                     {
                             LOG(WARNING) << "Exception writing observables dump file " << e.what();
                     }
@@ -389,11 +389,6 @@ int gps_l1_ca_pvt_cc::general_work (int noutput_items, gr_vector_int &ninput_ite
         }
 
     consume_each(1); //one by one
-    output_items.clear();  // removes a warning
-    if((noutput_items == 0) || (ninput_items[0] == 0))
-        {
-            LOG(WARNING) << "noutput_items = 0";
-        }
     return 1;
 }
 
diff --git a/src/algorithms/PVT/gnuradio_blocks/hybrid_pvt_cc.cc b/src/algorithms/PVT/gnuradio_blocks/hybrid_pvt_cc.cc
index 044c9689e..63bd24e26 100644
--- a/src/algorithms/PVT/gnuradio_blocks/hybrid_pvt_cc.cc
+++ b/src/algorithms/PVT/gnuradio_blocks/hybrid_pvt_cc.cc
@@ -138,8 +138,8 @@ bool hybrid_pvt_cc::pseudoranges_pairCompare_min(const std::pair<int,Gnss_Synchr
 
 
 
-int hybrid_pvt_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
-        gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items)
+int hybrid_pvt_cc::general_work (int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
+        gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items __attribute__((unused)))
 {
     d_sample_counter++;
     bool arrived_galileo_almanac = false;
@@ -370,11 +370,6 @@ int hybrid_pvt_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
         }
 
     consume_each(1); //one by one
-    output_items.clear();  // removes a warning
-    if((noutput_items == 0) || (ninput_items[0] == 0))
-        {
-            LOG(WARNING) << "noutput_items = 0";
-        }
     return 1;
 }
 
diff --git a/src/algorithms/acquisition/gnuradio_blocks/galileo_e5a_noncoherent_iq_acquisition_caf_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/galileo_e5a_noncoherent_iq_acquisition_caf_cc.cc
index 786cf7198..123ce5ce3 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/galileo_e5a_noncoherent_iq_acquisition_caf_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/galileo_e5a_noncoherent_iq_acquisition_caf_cc.cc
@@ -342,7 +342,7 @@ void galileo_e5a_noncoherentIQ_acquisition_caf_cc::set_state(int state)
 
 int galileo_e5a_noncoherentIQ_acquisition_caf_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
     /*
      * By J.Arribas, L.Esteve, M.Molina and M.Sales
@@ -806,7 +806,6 @@ int galileo_e5a_noncoherentIQ_acquisition_caf_cc::general_work(int noutput_items
         }
     }
 
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
 
diff --git a/src/algorithms/acquisition/gnuradio_blocks/galileo_pcps_8ms_acquisition_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/galileo_pcps_8ms_acquisition_cc.cc
index c4fbb93ac..58ff25804 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/galileo_pcps_8ms_acquisition_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/galileo_pcps_8ms_acquisition_cc.cc
@@ -206,7 +206,7 @@ void galileo_pcps_8ms_acquisition_cc::set_state(int state)
 
 int galileo_pcps_8ms_acquisition_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
 
     int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
@@ -416,6 +416,5 @@ int galileo_pcps_8ms_acquisition_cc::general_work(int noutput_items,
         }
     }
 
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
diff --git a/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.cc
index 07f3e6b4e..699ba060f 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.cc
@@ -226,7 +226,7 @@ void pcps_acquisition_cc::set_state(int state)
 
 int pcps_acquisition_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
     /*
      * By J.Arribas, L.Esteve and M.Molina
@@ -472,7 +472,6 @@ int pcps_acquisition_cc::general_work(int noutput_items,
         }
     }
 
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
 
diff --git a/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_fine_doppler_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_fine_doppler_cc.cc
index 9d63da86d..4744c16c6 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_fine_doppler_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_fine_doppler_cc.cc
@@ -427,7 +427,7 @@ int pcps_acquisition_fine_doppler_cc::estimate_Doppler(gr_vector_const_void_star
 
 int pcps_acquisition_fine_doppler_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
 
     /*!
@@ -525,6 +525,5 @@ int pcps_acquisition_fine_doppler_cc::general_work(int noutput_items,
     //DLOG(INFO)<<"d_sample_counter="<<d_sample_counter<<std::endl;
     d_sample_counter += d_fft_size; // sample counter
     consume_each(d_fft_size);
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
diff --git a/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_sc.cc b/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_sc.cc
index 3ad935a38..2c29e6141 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_sc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_sc.cc
@@ -228,7 +228,7 @@ void pcps_acquisition_sc::set_state(int state)
 
 int pcps_acquisition_sc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
     /*
      * By J.Arribas, L.Esteve and M.Molina
@@ -477,6 +477,5 @@ int pcps_acquisition_sc::general_work(int noutput_items,
         }
     }
 
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
diff --git a/src/algorithms/acquisition/gnuradio_blocks/pcps_assisted_acquisition_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/pcps_assisted_acquisition_cc.cc
index d8eef0288..440aede4f 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/pcps_assisted_acquisition_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/pcps_assisted_acquisition_cc.cc
@@ -371,7 +371,7 @@ int pcps_assisted_acquisition_cc::compute_and_accumulate_grid(gr_vector_const_vo
 
 int pcps_assisted_acquisition_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
     /*!
      * TODO: 	High sensitivity acquisition algorithm:
@@ -488,6 +488,5 @@ int pcps_assisted_acquisition_cc::general_work(int noutput_items,
         break;
     }
 
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
diff --git a/src/algorithms/acquisition/gnuradio_blocks/pcps_cccwsr_acquisition_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/pcps_cccwsr_acquisition_cc.cc
index 808c8110a..e47cc7864 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/pcps_cccwsr_acquisition_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/pcps_cccwsr_acquisition_cc.cc
@@ -221,7 +221,7 @@ void pcps_cccwsr_acquisition_cc::set_state(int state)
 
 int pcps_cccwsr_acquisition_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
 
     int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
@@ -441,6 +441,5 @@ int pcps_cccwsr_acquisition_cc::general_work(int noutput_items,
         }
     }
 
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
diff --git a/src/algorithms/acquisition/gnuradio_blocks/pcps_multithread_acquisition_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/pcps_multithread_acquisition_cc.cc
index 2cb97e602..81bd162b3 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/pcps_multithread_acquisition_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/pcps_multithread_acquisition_cc.cc
@@ -343,7 +343,7 @@ void pcps_multithread_acquisition_cc::set_state(int state)
 
 int pcps_multithread_acquisition_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
 
     int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
@@ -470,6 +470,5 @@ int pcps_multithread_acquisition_cc::general_work(int noutput_items,
 
     consume_each(ninput_items[0]);
 
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
diff --git a/src/algorithms/acquisition/gnuradio_blocks/pcps_opencl_acquisition_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/pcps_opencl_acquisition_cc.cc
index ef42c3f5e..f209abf1d 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/pcps_opencl_acquisition_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/pcps_opencl_acquisition_cc.cc
@@ -690,7 +690,7 @@ void pcps_opencl_acquisition_cc::set_state(int state)
 
 int pcps_opencl_acquisition_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
     int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
     switch (d_state)
@@ -822,6 +822,5 @@ int pcps_opencl_acquisition_cc::general_work(int noutput_items,
 
     consume_each(ninput_items[0]);
 
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
diff --git a/src/algorithms/acquisition/gnuradio_blocks/pcps_quicksync_acquisition_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/pcps_quicksync_acquisition_cc.cc
index 55f8f16d3..e01a413a7 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/pcps_quicksync_acquisition_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/pcps_quicksync_acquisition_cc.cc
@@ -253,7 +253,7 @@ void pcps_quicksync_acquisition_cc::set_state(int state)
 
 int pcps_quicksync_acquisition_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
     /*
      * By J.Arribas, L.Esteve and M.Molina
@@ -577,6 +577,5 @@ int pcps_quicksync_acquisition_cc::general_work(int noutput_items,
             break;
         }
     }
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
diff --git a/src/algorithms/acquisition/gnuradio_blocks/pcps_tong_acquisition_cc.cc b/src/algorithms/acquisition/gnuradio_blocks/pcps_tong_acquisition_cc.cc
index 8c0fec7c9..2ebdfeac9 100644
--- a/src/algorithms/acquisition/gnuradio_blocks/pcps_tong_acquisition_cc.cc
+++ b/src/algorithms/acquisition/gnuradio_blocks/pcps_tong_acquisition_cc.cc
@@ -233,7 +233,7 @@ void pcps_tong_acquisition_cc::set_state(int state)
 
 int pcps_tong_acquisition_cc::general_work(int noutput_items,
         gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
-        gr_vector_void_star &output_items)
+        gr_vector_void_star &output_items __attribute__((unused)))
 {
     int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
 
@@ -434,6 +434,5 @@ int pcps_tong_acquisition_cc::general_work(int noutput_items,
         }
     }
 
-    output_items.clear();  // removes a warning
     return noutput_items;
 }
diff --git a/src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc b/src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc
index 8c95cb55b..27b1dd75a 100644
--- a/src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc
+++ b/src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc
@@ -250,9 +250,9 @@ signal_generator_c::~signal_generator_c()
 }
 
 
-int signal_generator_c::general_work (int noutput_items,
-                   gr_vector_int &ninput_items,
-gr_vector_const_void_star &input_items,
+int signal_generator_c::general_work (int noutput_items __attribute__((unused)),
+                   gr_vector_int &ninput_items __attribute__((unused)),
+gr_vector_const_void_star &input_items __attribute__((unused)),
 gr_vector_void_star &output_items)
 {
     gr_complex *out = (gr_complex *) output_items[0];
@@ -388,11 +388,6 @@ gr_vector_void_star &output_items)
                 }
         }
 
-    if((noutput_items == 0) || (ninput_items.size() != 0) || input_items[0] == 0)
-        {
-            // do nothing
-        }
-
     // Tell runtime system how many output items we produced.
     return 1;
 }
diff --git a/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e1b_telemetry_decoder_cc.cc b/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e1b_telemetry_decoder_cc.cc
index a6708eb96..0e0ca0507 100644
--- a/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e1b_telemetry_decoder_cc.cc
+++ b/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e1b_telemetry_decoder_cc.cc
@@ -290,7 +290,7 @@ void galileo_e1b_telemetry_decoder_cc::decode_word(double *page_part_symbols,int
 
 
 
-int galileo_e1b_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
+int galileo_e1b_telemetry_decoder_cc::general_work (int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
         gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items)
 {
     int corr_value = 0;
@@ -494,10 +494,7 @@ int galileo_e1b_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
         }
     //todo: implement averaging
     d_average_count++;
-    if((noutput_items == 0) || (ninput_items[0] == 0))
-        {
-            LOG(WARNING) << "noutput_items = 0";
-        }
+
     if (d_average_count == d_decimation_output_factor)
         {
             d_average_count = 0;
diff --git a/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e5a_telemetry_decoder_cc.cc b/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e5a_telemetry_decoder_cc.cc
index 1765cb13c..df0ee2927 100644
--- a/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e5a_telemetry_decoder_cc.cc
+++ b/src/algorithms/telemetry_decoder/gnuradio_blocks/galileo_e5a_telemetry_decoder_cc.cc
@@ -274,7 +274,7 @@ galileo_e5a_telemetry_decoder_cc::~galileo_e5a_telemetry_decoder_cc()
 }
 
 
-int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
+int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
         gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items)
 {
     //
@@ -340,16 +340,6 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
                     // **** Attempt Preamble correlation ****
                     bool corr_flag=true;
                     int corr_sign = 0; // sequence can be found inverted
-                    //	corr_sign = d_preamble_bits[0] * d_page_symbols[d_symbol_counter - GALILEO_FNAV_PREAMBLE_LENGTH_BITS];
-                    //	for (int i = 1; i < GALILEO_FNAV_PREAMBLE_LENGTH_BITS; i++)
-                    //	     {
-                    //	         if ((d_preamble_bits[i] * d_page_symbols[i + d_symbol_counter - GALILEO_FNAV_PREAMBLE_LENGTH_BITS]) != corr_sign)
-                    //	             {
-                    //                    //exit for if one bit doesn't correlate
-                    //                    corr_flag = false;
-                    //                    break;
-                    //               }
-                    //	     }
                     // check if the preamble starts positive correlated or negative correlated
                     if (d_page_symbols[d_symbol_counter - GALILEO_FNAV_PREAMBLE_LENGTH_BITS] < 0)	// symbols clipping
                         {
@@ -583,10 +573,6 @@ int galileo_e5a_telemetry_decoder_cc::general_work (int noutput_items, gr_vector
     d_sample_counter++; //count for the processed samples
     //3. Make the output (copy the object contents to the GNURadio reserved memory)
     *out[0] = current_synchro_data;
-    if((noutput_items == 0) || (ninput_items[0] == 0))
-        {
-            LOG(WARNING) << "noutput_items = 0";
-        }
     return 1;
 }
 
diff --git a/src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l1_ca_telemetry_decoder_cc.cc b/src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l1_ca_telemetry_decoder_cc.cc
index b4d00ffd2..f7162c58c 100644
--- a/src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l1_ca_telemetry_decoder_cc.cc
+++ b/src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l1_ca_telemetry_decoder_cc.cc
@@ -49,7 +49,7 @@ gps_l1_ca_make_telemetry_decoder_cc(Gnss_Satellite satellite, boost::shared_ptr<
     return gps_l1_ca_telemetry_decoder_cc_sptr(new gps_l1_ca_telemetry_decoder_cc(satellite, queue, dump));
 }
 
-void gps_l1_ca_telemetry_decoder_cc::forecast (int noutput_items, gr_vector_int &ninput_items_required)
+void gps_l1_ca_telemetry_decoder_cc::forecast (int noutput_items __attribute__((unused)), gr_vector_int &ninput_items_required)
 {
     ninput_items_required[0] = GPS_CA_PREAMBLE_LENGTH_SYMBOLS; //set the required sample history
 }
@@ -142,7 +142,7 @@ bool gps_l1_ca_telemetry_decoder_cc::gps_word_parityCheck(unsigned int gpsword)
 }
 
 
-int gps_l1_ca_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
+int gps_l1_ca_telemetry_decoder_cc::general_work (int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
         gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items)
 {
     int corr_value = 0;
@@ -348,10 +348,6 @@ int gps_l1_ca_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_i
     //todo: implement averaging
 
     d_average_count++;
-    if((noutput_items == 0) || (ninput_items[0] == 0))
-        {
-            LOG(WARNING) << "noutput_items = 0";
-        }
     if (d_average_count == d_decimation_output_factor)
         {
             d_average_count = 0;
diff --git a/src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l2_m_telemetry_decoder_cc.cc b/src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l2_m_telemetry_decoder_cc.cc
index a49d3cfa7..adeb22711 100644
--- a/src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l2_m_telemetry_decoder_cc.cc
+++ b/src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l2_m_telemetry_decoder_cc.cc
@@ -57,7 +57,7 @@ gps_l2_m_make_telemetry_decoder_cc(Gnss_Satellite satellite, boost::shared_ptr<g
 
 gps_l2_m_telemetry_decoder_cc::gps_l2_m_telemetry_decoder_cc(
         Gnss_Satellite satellite,
-        boost::shared_ptr<gr::msg_queue> queue,
+        boost::shared_ptr<gr::msg_queue> queue __attribute__((unused)),
         bool dump) :
                 gr::block("gps_l2_m_telemetry_decoder_cc",
                 gr::io_signature::make(1, 1, sizeof(Gnss_Synchro)),
@@ -110,7 +110,7 @@ void gps_l2_m_telemetry_decoder_cc::set_decimation(int decimation)
 }
 
 
-int gps_l2_m_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
+int gps_l2_m_telemetry_decoder_cc::general_work (int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
         gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items)
 {
     // get pointers on in- and output gnss-synchro objects
@@ -118,7 +118,7 @@ int gps_l2_m_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_in
     Gnss_Synchro *out = (Gnss_Synchro *) output_items[0];            // output
 
     // store the time stamp of the first sample in the processed sample block
-    double sample_stamp = in[0].Tracking_timestamp_secs;
+    //double sample_stamp = in[0].Tracking_timestamp_secs;
 
     bool flag_new_cnav_frame = false;
     int last_frame_preamble_start = 0;
@@ -152,7 +152,8 @@ int gps_l2_m_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_in
                             // and obtain the bits by decoding the symbols (viterbi decoder)
                             // they can be already aligned or shifted by one position
                             std::vector<int> bits;
-                            bool symbol_alignment = d_symbol_aligner_and_decoder.get_bits(d_sample_buf, bits);
+
+                            //bool symbol_alignment = d_symbol_aligner_and_decoder.get_bits(d_sample_buf, bits);
 
                             //std::stringstream ss;
                             //for (std::vector<int>::const_iterator bit_it = bits.begin(); bit_it < bits.end(); ++bit_it)
@@ -260,10 +261,6 @@ int gps_l2_m_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_in
         }
 
     d_average_count++;
-    if((noutput_items == 0) || (ninput_items[0] == 0))
-        {
-            LOG(WARNING) << "noutput_items = 0";
-        }
     if (d_average_count == d_decimation_output_factor)
         {
             d_average_count = 0;
diff --git a/src/algorithms/telemetry_decoder/gnuradio_blocks/sbas_l1_telemetry_decoder_cc.cc b/src/algorithms/telemetry_decoder/gnuradio_blocks/sbas_l1_telemetry_decoder_cc.cc
index 026167790..b7c772888 100644
--- a/src/algorithms/telemetry_decoder/gnuradio_blocks/sbas_l1_telemetry_decoder_cc.cc
+++ b/src/algorithms/telemetry_decoder/gnuradio_blocks/sbas_l1_telemetry_decoder_cc.cc
@@ -57,7 +57,7 @@ sbas_l1_make_telemetry_decoder_cc(Gnss_Satellite satellite, boost::shared_ptr<gr
 
 sbas_l1_telemetry_decoder_cc::sbas_l1_telemetry_decoder_cc(
         Gnss_Satellite satellite,
-        boost::shared_ptr<gr::msg_queue> queue,
+        boost::shared_ptr<gr::msg_queue> queue __attribute__((unused)),
         bool dump) :
                 gr::block("sbas_l1_telemetry_decoder_cc",
                 gr::io_signature::make(1, 1, sizeof(Gnss_Synchro)),
@@ -93,7 +93,7 @@ void sbas_l1_telemetry_decoder_cc::forecast (int noutput_items, gr_vector_int &n
 
 
 
-int sbas_l1_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
+int sbas_l1_telemetry_decoder_cc::general_work (int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
         gr_vector_const_void_star &input_items,	gr_vector_void_star &output_items)
 {
     VLOG(FLOW) << "general_work(): " << "noutput_items=" << noutput_items << "\toutput_items real size=" << output_items.size() <<  "\tninput_items size=" << ninput_items.size() << "\tinput_items real size=" << input_items.size() << "\tninput_items[0]=" << ninput_items[0];
@@ -182,10 +182,6 @@ int sbas_l1_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_int
             current_synchro_data[i].Flag_valid_word = false; // indicate to observable block that this synchro object isn't valid for pseudorange computation
         }
     consume_each(noutput_items); // tell scheduler input items consumed
-    if((noutput_items == 0) || (ninput_items[0] == 0))
-        {
-            LOG(WARNING) << "noutput_items = 0";
-        }
     return noutput_items; // tell scheduler output items produced
 }