header files with cross compilation

[Chris Croswhite <csc@xxxxxxxxxxx>]

Hello.

I have a question:  when using gcc configed with --sysroot=blah, does
"#include <stdio.h> use the sysroot headers or the headers from the
system (/usr/include)?  Do I need to modify all my source code to point
to these alternate header files (the header files in sysroot)?

TIA,
Chris