Will C compiler attach the whole object code of the header file?

When you compile a C source code does the compiler convert the whole header file to object code or just the functions of the header file you use?

Like for example, in the header file #include stdio.h, there are printf(); and scanf(); but even to use one of them, you have to include the header file "stdio.h", so when you compile a C source code which uses only printf(); but doesn't use scanf();, will the compiler also include the object code of scanf(); and other functions of "stdio.h" in the file?