user@networkslab:~/emil151997/simple_udp/server_linux$ make
Scanning dependencies of target server_linux
[ 50%] Building C object CMakeFiles/server_linux.dir/main.c.o
/home/user/emil151997/simple_udp/server_linux/main.c: In function ‘main’:
/home/user/emil151997/simple_udp/server_linux/main.c:53:20: error: ‘n’ undeclared (first use in this function)
             buffer[n] = '\0';
                    ^
/home/user/emil151997/simple_udp/server_linux/main.c:53:20: note: each undeclared identifier is reported only once for each function it appears in
/home/user/emil151997/simple_udp/server_linux/main.c:63:14: warning: passing argument 1 of ‘free’ makes pointer from integer without a cast [-Wint-conversion]
         free(sockfd)
              ^~~~~~
In file included from /home/user/emil151997/simple_udp/server_linux/main.c:2:0:
/usr/include/stdlib.h:563:13: note: expected ‘void *’ but argument is of type ‘int’
 extern void free (void *__ptr) __THROW;
             ^~~~
/home/user/emil151997/simple_udp/server_linux/main.c:64:17: error: expected ‘;’ before ‘close’
                 close(sockfd);
                 ^~~~~
/home/user/emil151997/simple_udp/server_linux/main.c:12:30: warning: unused variable ‘ss’ [-Wunused-variable]
     int sockfd,received_size,ss;
                              ^~
/home/user/emil151997/simple_udp/server_linux/main.c:11:14: warning: unused parameter ‘argc’ [-Wunused-parameter]
 int main(int argc, char *argv[]) {
              ^~~~
/home/user/emil151997/simple_udp/server_linux/main.c:11:26: warning: unused parameter ‘argv’ [-Wunused-parameter]
 int main(int argc, char *argv[]) {
                          ^~~~
CMakeFiles/server_linux.dir/build.make:62: recipe for target 'CMakeFiles/server_linux.dir/main.c.o' failed
make[2]: *** [CMakeFiles/server_linux.dir/main.c.o] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/server_linux.dir/all' failed
make[1]: *** [CMakeFiles/server_linux.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2