Compiling and Linking GTK 3 with C project on Ubuntu

Question

I believe this is not a duplicate question, I have seen all questions/answers before I post this question. I think I have a different situation here.

I use Ubuntu 12.04

Answer 1

You should compile with source file appearing before the libraries as gcc hello.c $(pkg-config --cflags --libs gtk+-3.0) -o hello, the reason being the behavior of linker i.e it does not link the libraries unless the symbols of that library is seen prior in compilation.
Hope this helps!