CC      libavformat/os_support.o
src/libavformat/os_support.c:64:12: error: static declaration of ‘inet_aton’ follows non-static declaration
 static int inet_aton(const char *str, struct in_addr *add)
            ^~~~~~~~~
In file included from src/libavformat/network.h:69:0,
                 from src/libavformat/os_support.c:44:
/usr/include/arpa/inet.h:73:12: note: previous declaration of ‘inet_aton’ was here
 extern int inet_aton (const char *__cp, struct in_addr *__inp) __THROW;
            ^~~~~~~~~
src/libavformat/os_support.c:64:12: warning: ‘inet_aton’ defined but not used [-Wunused-function]
 static int inet_aton(const char *str, struct in_addr *add)
            ^~~~~~~~~
make: *** [/home/jamrial/ffmpeg/ffbuild/common.mak:60: libavformat/os_support.o] Error 1