pi@raspberrypi:~/contiki-ng/examples/rpl-border-router $ make
TARGET not defined, using target 'native'
  MKDIR     build/native/obj
  CC        ../../arch/platform/native/./platform.c
  CC        ../../arch/platform/native/./clock.c
  CC        ../../arch/platform/native/dev/xmem.c
  CC        ../../arch/platform/native/./cfs-posix.c
  CC        ../../arch/platform/native/./cfs-posix-dir.c
../../arch/platform/native/./cfs-posix-dir.c: In function ‘cfs_readdir’:
../../arch/platform/native/./cfs-posix-dir.c:69:3: warning: ‘strncpy’ output may be truncated copying 32 bytes from a string of length 255 [-Wstringop-truncation]
   strncpy(e->name, res->d_name, sizeof(e->name));
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  CC        ../../arch/platform/native/dev/buttons.c
  CC        ../../arch/cpu/native/net/tun6-net.c
In function ‘tun_alloc.constprop’,
    inlined from ‘tun_init’ at ../../arch/cpu/native/net/tun6-net.c:211:11:
../../arch/cpu/native/net/tun6-net.c:161:5: warning: ‘strncpy’ output may be truncated copying 16 bytes from a string of length 63 [-Wstringop-truncation]
     strncpy(ifr.ifr_name, dev, IFNAMSIZ);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  CC        ../../arch/cpu/native/./rtimer-arch.c
  CC        ../../arch/cpu/native/./watchdog.c
  CC        ../../arch/cpu/native/dev/eeprom.c
  CC        ../../arch/cpu/native/./int-master.c
  CC        ../../arch/cpu/native/dev/gpio-hal-arch.c
  CC        webserver/httpd-simple.c
webserver/httpd-simple.c: In function ‘handle_input’:
webserver/httpd-simple.c:174:5: warning: ‘strncpy’ output truncated copying 1 byte from a string of length 11 [-Wstringop-truncation]
     strncpy(s->filename, http_index_html, sizeof(s->filename) - 1);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
webserver/httpd-simple.c: In function ‘handle_output’:
webserver/httpd-simple.c:131:5: warning: ‘strncpy’ output truncated copying 1 byte from a string of length 14 [-Wstringop-truncation]
     strncpy(s->filename, "/notfound.html", sizeof(s->filename) - 1);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
webserver/httpd-simple.c: In function ‘handle_input’:
webserver/httpd-simple.c:178:5: warning: ‘strncpy’ output may be truncated copying 2 bytes from a string of length 25 [-Wstringop-truncation]
     strncpy(s->filename, s->inputbuf, sizeof(s->filename));
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


....





../../os/services/rpl-border-router/native/tun-bridge.c: In function ‘tun_alloc’:
../../os/services/rpl-border-router/native/tun-bridge.c:168:5: warning: ‘strncpy’ specified bound 16 equals destination size [-Wstringop-truncation]
     strncpy(ifr.ifr_name, dev, IFNAMSIZ);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  CC        ../../os/services/rpl-border-router/native/slip-dev.c
  CC        ../../os/services/rpl-border-router/native/border-router-native.c
  CC        ../../os/services/rpl-border-router/native/slip-config.c
../../os/services/rpl-border-router/native/slip-config.c: In function ‘slip_config_handle_arguments’:
../../os/services/rpl-border-router/native/slip-config.c:102:9: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
         strncpy(slip_config_tundev, optarg, sizeof(slip_config_tundev));
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../os/services/rpl-border-router/native/slip-config.c:100:9: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
         strncpy(slip_config_tundev, optarg + 5, sizeof(slip_config_tundev));
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~