Help About import external Lib

ROOT
1

supporse there is a lib called “extlib.lib” and the lib’s header file called “extlib.h”,i created a dummy header called “dummy.h”

The Contents of extlib.h:

#include "libstruct.h"
int _DLLEXPORT funcA(vector<NodeInfo> &test,_int64 type);

The contents of dummy.h

#ifndef __MAKECINT__
	#include "extlib.h"
#else
             #include "libstruct.h"
             int funcA(vector<NodeInfo> &test,long long type);
             //#pragma link C++ function funcA;
#endif

The contents of “libstruct.h”:

//Here include some windows header
#include <PshPack8.h>
 typedef struct NodeInfoTag
{
   _int64 varA;//here use the _int64
   ............
}NodeInfo;
#include <PopPack.h>

then i typed

makecint -mk Makefile -dl libext.dll -H dummy.h -l extlib.lib
make

while the response says:

Question:

2

Hi,

It looks like you are simply missing the #include

Cheers,
Philippe.

3

where should i add the "#include "?

i tried to add the above statement.but it seems not functional;
i don’t now y.

the contents of dummy.h

#ifndef DUMMY_H
#define DUMMY_H
             //111111111111111111111111111   place1
#ifndef __MAKECINT__ 
             //222222222222222222222222222   place2
             #include "extlib.h" 
#else 
             //333333333333333333333333333   place3
             #include "libstruct.h" 
             int funcA(vector<NodeInfo> &test,long long type); 
             //#pragma link C++ function funcA; 
#endif

#endif

i place the include statement at the place1(//11111111),but there seems no function.y?

btw, what the difference of place1,place2,place3?

am i right that the place 1 is processed by both cint.exe and cl.exe?
am i right that the place 2 is peocessed only by cl.exe?
am i right that the place 3 is only processed by cint.exe?

do i need to add “using namespace std;” follow the "#include " statements?
when i added the “using namespace std”,there has lots of errors about the vector.

really confusing…

4

Hi,

It should alreday be included in extlib.h because you say that it’s used in there. It should also read int _DLLEXPORT funcA(std::vector<NodeInfo> &test,_int64 type);in extlib.h.

I would add #include at what you call “place 3” - i.e. just #include it where it’s needed or used.

[quote=“luckyzhangwei”]btw, what the difference of place1,place2,place3?

am i right that the place 1 is processed by both cint.exe and cl.exe?
am i right that the place 2 is peocessed only by cl.exe?
am i right that the place 3 is only processed by cint.exe?
[/quote]
Correct.

No.

You did pretty well for that :slight_smile:

Cheers, Axel.