-GTK required -Use the following terminal command (Linux) to compile the server and the client:
CLIENT:
cc -Wno-format -o Client Client.c -Wno-deprecated-declarations -Wno-format-security -lm pkg-config --cflags --libs gtk+-3.0 -export-dynamic
SERVER:
cc -Wno-format -o Server Server.c -Wno-deprecated-declarations -Wno-format-security -lm pkg-config --cflags --libs gtk+-3.0 -export-dynamic