[cfe-dev] How clang handle user's include

[via cfe-dev]

Hi,

I'm looking at the clang source code and I'm wandering where clang 
handle the include from users.

If you have a simple C file foo.c:

#include <stdio.h>
#include "foo.h"

void foo(void) {
   printf("foo\n");
}

int main(void) {
   foo();
   return 0;
}

and the corresponding foo.h header:

void foo(void);

Which part of clang "merge" (or inline) foo.c and foo.h together? If I 
understand well that is what is happening, right?

Thank you for your answers!

Cheers,
Julien