lame question about #include dependecies

lets say i have 3 headers

one

header1.h
#ifndef header1H
#define header1H

#define ALOHA 1

inline int sum() { return 2+2; }

#endif


second

header2.h
#ifndef header2H
#define header2H

#include "header1.h"

some random code
#endif


and third last file header3.h
#ifndef header3H
#define header3H

#include "header2.h"

some random code
#endif

now my question is while in header3.h

can i access

#define ALOHA 1

inline int sum() { return 2+2; }

i need to know that coz i have a tough time to resolve unresolved external __glewDeleteProgram.

[spoiler]

https://forums.embarcadero.com/thread.jspa?threadID=245303&stqc=true

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