x86_64-pc-linux-gnu-gcc -fPIC -DPIC -DHAVE_CONFIG_H -DNDEBUG -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DINET -DARP -DARPING -DIPV4LL -DAUTH -DPRIVSEP -DEMBEDDED_CONFIG=\"/lib/dhcpcd/dhcpcd-definitions.conf\" -DPLUGIN_DEV -I../../ -I../..//src  -march=native -mtune=native -O2 -pipe -std=c99  -c udev.c -o udev.So
udev.c: In function ‘udev_start’:
udev.c:127:13: error: implicit declaration of function ‘if_getnetworknamespace’ [-Wimplicit-function-declaration]
  127 |         if (if_getnetworknamespace(netns, sizeof(netns)) != NULL) {
      |             ^~~~~~~~~~~~~~~~~~~~~~
udev.c:127:58: warning: comparison between pointer and integer
  127 |         if (if_getnetworknamespace(netns, sizeof(netns)) != NULL) {
      |                                                          ^~
make[2]: *** [Makefile:21: udev.So] Error 1