Fix some compilation warnings generated by xtensa-espressif-gcc

CMakeLists.txt

@@ -50,6 +50,7 @@ execute_process(COMMAND git describe --tags --dirty
 
 target_compile_definitions(app
   PRIVATE
+    _GNU_SOURCE
     FONT_UBUNTU_REGULAR
     CODEC2_MODE_EN_DEFAULT=0
     FREEDV_MODE_EN_DEFAULT=0

openrtx/src/core/gps.c

@@ -145,7 +145,7 @@ void gps_task()
                 // When the first sentence arrives, clear all the old data
                 if (frame.msg_nr == 1)
                 {
-                    bzero(&gps_data.satellites[0], 12 * sizeof(gpssat_t));
+                    memset(&gps_data.satellites[0], 0x00, 12 * sizeof(gpssat_t));
                 }
 
                 gps_data.satellites_in_view = frame.total_sats;

openrtx/src/core/voicePrompts.c

@@ -26,6 +26,7 @@
 #include <voicePrompts.h>
 #include <audio_codec.h>
 #include <audio_path.h>
+#include <strings.h>    // For strncasecmp
 #include <ctype.h>
 #include <state.h>
 #include <stdio.h>

openrtx/src/ui/default/ui_menu.c

@@ -463,7 +463,7 @@ int _ui_getBankName(char *buf, uint8_t max_len, uint8_t index)
     // First bank "All channels" is not read from flash
     if(index == 0)
     {
-        snprintf(buf, max_len, currentLanguage->allChannels);
+        strncpy(buf, currentLanguage->allChannels, max_len);
     }
     else
     {