diff --git a/common/JackAudioAdapterInterface.cpp b/common/JackAudioAdapterInterface.cpp
index cb589893..c4577293 100644
--- a/common/JackAudioAdapterInterface.cpp
+++ b/common/JackAudioAdapterInterface.cpp
@@ -46,7 +46,6 @@ namespace Jack
 
     void MeasureTable::Save(unsigned int fHostBufferSize, unsigned int fHostSampleRate, unsigned int fAdaptedSampleRate, unsigned int fAdaptedBufferSize)
     {
-        char buffer[1024];
         FILE* file = fopen("JackAudioAdapter.log", "w");
 
         int max = (fCount) % TABLE_MAX - 1;
@@ -68,10 +67,8 @@ namespace Jack
         fprintf(file, "set xlabel \"audio cycles\"\n");
         fprintf(file, "set ylabel \"frames\"\n");
         fprintf(file, "plot ");
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 2 title \"Ringbuffer error\" with lines,");
-        fprintf(file, buffer);
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 3 title \"Ringbuffer error with timing correction\" with lines");
-        fprintf(file, buffer);
+        fprintf(file, "\"JackAudioAdapter.log\" using 2 title \"Ringbuffer error\" with lines,");
+        fprintf(file, "\"JackAudioAdapter.log\" using 3 title \"Ringbuffer error with timing correction\" with lines");
 
         fprintf(file, "\n unset multiplot\n");
         fprintf(file, "set output 'AdapterTiming1.svg\n");
@@ -84,10 +81,8 @@ namespace Jack
         fprintf(file, "set xlabel \"audio cycles\"\n");
         fprintf(file, "set ylabel \"frames\"\n");
         fprintf(file, "plot ");
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 2 title \"Consumer interrupt period\" with lines,");
-        fprintf(file, buffer);
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 3 title \"Producer interrupt period\" with lines\n");
-        fprintf(file, buffer);
+        fprintf(file, "\"JackAudioAdapter.log\" using 2 title \"Consumer interrupt period\" with lines,");
+        fprintf(file, "\"JackAudioAdapter.log\" using 3 title \"Producer interrupt period\" with lines\n");
         fprintf(file, "unset multiplot\n");
         fprintf(file, "unset output\n");
 
@@ -102,10 +97,8 @@ namespace Jack
         fprintf(file, "set xlabel \"audio cycles\"\n");
         fprintf(file, "set ylabel \"resampling ratio\"\n");
         fprintf(file, "plot ");
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 4 title \"Ratio 1\" with lines,");
-        fprintf(file, buffer);
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 5 title \"Ratio 2\" with lines");
-        fprintf(file, buffer);
+        fprintf(file, "\"JackAudioAdapter.log\" using 4 title \"Ratio 1\" with lines,");
+        fprintf(file, "\"JackAudioAdapter.log\" using 5 title \"Ratio 2\" with lines");
 
         fprintf(file, "\n unset multiplot\n");
         fprintf(file, "set output 'AdapterTiming2.svg\n");
@@ -118,10 +111,8 @@ namespace Jack
         fprintf(file, "set xlabel \"audio cycles\"\n");
         fprintf(file, "set ylabel \"resampling ratio\"\n");
         fprintf(file, "plot ");
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 4 title \"Ratio 1\" with lines,");
-        fprintf(file, buffer);
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 5 title \"Ratio 2\" with lines\n");
-        fprintf(file, buffer);
+        fprintf(file, "\"JackAudioAdapter.log\" using 4 title \"Ratio 1\" with lines,");
+        fprintf(file, "\"JackAudioAdapter.log\" using 5 title \"Ratio 2\" with lines\n");
         fprintf(file, "unset multiplot\n");
         fprintf(file, "unset output\n");
 
@@ -136,10 +127,8 @@ namespace Jack
          fprintf(file, "set xlabel \"audio cycles\"\n");
         fprintf(file, "set ylabel \"frames\"\n");
         fprintf(file, "plot ");
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 6 title \"Frames position in consumer ringbuffer\" with lines,");
-        fprintf(file, buffer);
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 7 title \"Frames position in producer ringbuffer\" with lines");
-        fprintf(file, buffer);
+        fprintf(file, "\"JackAudioAdapter.log\" using 6 title \"Frames position in consumer ringbuffer\" with lines,");
+        fprintf(file, "\"JackAudioAdapter.log\" using 7 title \"Frames position in producer ringbuffer\" with lines");
 
         fprintf(file, "\n unset multiplot\n");
         fprintf(file, "set output 'AdapterTiming3.svg\n");
@@ -152,10 +141,8 @@ namespace Jack
         fprintf(file, "set xlabel \"audio cycles\"\n");
         fprintf(file, "set ylabel \"frames\"\n");
         fprintf(file, "plot ");
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 6 title \"Frames position in consumer ringbuffer\" with lines,");
-        fprintf(file, buffer);
-        sprintf(buffer, "\"JackAudioAdapter.log\" using 7 title \"Frames position in producer ringbuffer\" with lines\n");
-        fprintf(file, buffer);
+        fprintf(file, "\"JackAudioAdapter.log\" using 6 title \"Frames position in consumer ringbuffer\" with lines,");
+        fprintf(file, "\"JackAudioAdapter.log\" using 7 title \"Frames position in producer ringbuffer\" with lines\n");
         fprintf(file, "unset multiplot\n");
         fprintf(file, "unset output\n");
 
diff --git a/common/netjack.c b/common/netjack.c
index 34c32fb9..0f059482 100644
--- a/common/netjack.c
+++ b/common/netjack.c
@@ -57,6 +57,7 @@ $Id: net_driver.c,v 1.17 2006/04/16 20:16:10 torbenh Exp $
 
 #include "netjack.h"
 #include "netjack_packet.h"
+#include "JackError.h"
 
 #define MIN(x,y) ((x)<(y) ? (x) : (y))
 
diff --git a/common/netjack_packet.c b/common/netjack_packet.c
index 52e7c7ad..9919a85b 100644
--- a/common/netjack_packet.c
+++ b/common/netjack_packet.c
@@ -73,6 +73,7 @@
 #endif
 
 #include "netjack_packet.h"
+#include "JackError.h"
 
 #ifdef NO_JACK_ERROR
 #define jack_error printf
diff --git a/example-clients/midi_latency_test.c b/example-clients/midi_latency_test.c
index f5b274f7..1806946f 100644
--- a/example-clients/midi_latency_test.c
+++ b/example-clients/midi_latency_test.c
@@ -866,36 +866,36 @@ main(int argc, char **argv)
         printf("\nJitter Plot:\n");
         for (i = 0; i < 100; i++) {
             if (jitter_plot[i]) {
-                printf("%.1f - %.1f ms: %u\n", ((float) i) / 10.0,
+                printf("%.1f - %.1f ms: %zu\n", ((float) i) / 10.0,
                        ((float) (i + 1)) / 10.0, jitter_plot[i]);
             }
         }
         if (jitter_plot[100]) {
-            printf("     > 10 ms: %u\n", jitter_plot[100]);
+            printf("     > 10 ms: %zu\n", jitter_plot[100]);
         }
         printf("\nLatency Plot:\n");
         for (i = 0; i < 100; i++) {
             if (latency_plot[i]) {
-                printf("%.1f - %.1f ms: %u\n",
+                printf("%.1f - %.1f ms: %zu\n",
                        latency_plot_offset + (((float) i) / 10.0),
                        latency_plot_offset + (((float) (i + 1)) / 10.0),
                        latency_plot[i]);
             }
         }
         if (latency_plot[100]) {
-            printf("     > %.1f ms: %u\n", latency_plot_offset + 10.0,
+            printf("     > %.1f ms: %zu\n", latency_plot_offset + 10.0,
                    latency_plot[100]);
         }
     }
  deactivate_client:
     jack_deactivate(client);
-    printf("\nMessages sent: %d\nMessages received: %d\n", messages_sent,
+    printf("\nMessages sent: %zu\nMessages received: %zu\n", messages_sent,
            messages_received);
     if (unexpected_messages) {
-        printf("Unexpected messages received: %d\n", unexpected_messages);
+        printf("Unexpected messages received: %zu\n", unexpected_messages);
     }
     if (xrun_count) {
-        printf("Xruns: %d\n", xrun_count);
+        printf("Xruns: %zu\n", xrun_count);
     }
  destroy_process_semaphore:
     destroy_semaphore(process_semaphore, 2);
diff --git a/example-clients/server_control.cpp b/example-clients/server_control.cpp
index 46efa1bc..e131c73d 100644
--- a/example-clients/server_control.cpp
+++ b/example-clients/server_control.cpp
@@ -53,6 +53,7 @@ static jackctl_internal_t * jackctl_server_get_internal(jackctl_server_t *server
     return NULL;
 }
 
+#if 0
 static jackctl_parameter_t *
 jackctl_get_parameter(
     const JSList * parameters_list,
@@ -70,6 +71,7 @@ jackctl_get_parameter(
 
     return NULL;
 }
+#endif
 
 static void print_value(union jackctl_parameter_value value, jackctl_param_type_t type)
 {
diff --git a/linux/alsa/alsa_driver.c b/linux/alsa/alsa_driver.c
index c185e5fb..8e588e93 100644
--- a/linux/alsa/alsa_driver.c
+++ b/linux/alsa/alsa_driver.c
@@ -20,6 +20,7 @@
 
 
 #define __STDC_FORMAT_MACROS   // For inttypes.h to work in C++
+#define _GNU_SOURCE            /* for strcasestr() from string.h */
 
 #include <math.h>
 #include <stdio.h>
diff --git a/linux/alsarawmidi/JackALSARawMidiPort.cpp b/linux/alsarawmidi/JackALSARawMidiPort.cpp
index 12ae9259..1ead4623 100644
--- a/linux/alsarawmidi/JackALSARawMidiPort.cpp
+++ b/linux/alsarawmidi/JackALSARawMidiPort.cpp
@@ -116,7 +116,7 @@ JackALSARawMidiPort::JackALSARawMidiPort(snd_rawmidi_info_t *info,
     snprintf(alias, sizeof(alias), "system:%d-%d %s %d %s", card + 1,
              device + 1, snd_rawmidi_info_get_name(info), subdevice + 1,
              alias_suffix);
-    snprintf(name, sizeof(name), "%s%d", name_prefix, index + 1);
+    snprintf(name, sizeof(name), "%s%zu", name_prefix, index + 1);
     this->io_mask = io_mask;
     return;
  free_params:
diff --git a/tests/test.cpp b/tests/test.cpp
index 232be4ea..a48a5036 100644
--- a/tests/test.cpp
+++ b/tests/test.cpp
@@ -647,7 +647,7 @@ int main (int argc, char *argv[])
                                            &status, "inprocess", "");
 
     if (intclient == 0 || status & JackFailure) {
-        printf("!!! ERROR !!! cannot load internal client \"inprocess\" intclient %d status 0x%2.0x !\n", intclient, status);
+        printf("!!! ERROR !!! cannot load internal client \"inprocess\" intclient 0x%llX status 0x%2.0x !\n", (unsigned long long)intclient, status);
 	} else {
 
         Log("\"inprocess\" server internal client loaded\n");
@@ -663,7 +663,7 @@ int main (int argc, char *argv[])
         if (intclient1 == intclient) {
             Log("jack_internal_client_handle returns correct handle\n");
         } else {
-            printf("!!! ERROR !!! jack_internal_client_handle returns incorrect handle %d\n", intclient1);
+            printf("!!! ERROR !!! jack_internal_client_handle returns incorrect handle 0x%llX\n", (unsigned long long)intclient1);
         }
 
         // Unload internal client