Re: [ROOTDEV] SpecFunc

From: Lorenzo Moneta <Lorenzo.Moneta_at_cern.ch>
Date: Thu, 11 Mar 2010 08:53:54 +0100

Hello Christian,

You don;t need to add gSystem->Load("libMathMore") inside your code.  

• If you are running inside ROOT (with ACLIC) you need to do gSystem->Load("libMathMore") before running your macro.
• If you are running outside ROOT (your application) you need to add libMathMore to the linked library, i.e. you link with

`root-config --libs` -lMathMore

• If you are running interpreted code the library is automatically loaded when you include the file "Math/SpecFunc.h"

Cheers

 Lorenzo

On Mar 10, 2010, at 10:24 PM, Christian Hansen wrote:

>
>
> Dear Lorenzo,
>
> I tried
>
>
> # include "TSystem.h"
> # include "Math/SpecFunc.h"
> using namespace std;
> int main() {
> gSystem->Load("libMathMore");
> double K = ROOT::Math::comp_ellint_1(0.7);
> cout<<"K = "<<K<<endl;
> }
> #endif
>
>
> but when I compile the attached program I still get
>
>
> Undefined symbols:
> "ROOT::Math::comp_ellint_1(double)", referenced from:
> _main in test.o
> ld: symbol(s) not found
> collect2: ld returned 1 exit status
> make: *** [test] Error 1
>
>
>
> What did I do wrong?
>
> Best regards
> /Christian
>
>
> <test.tgz>
>
>
>
>
>
>
> On Mar 10, 2010, at 6:56 PM, Lorenzo Moneta wrote:
>

>> Hi Christian, 
>> 
>> you need to add libMathMore to the list of linked libraries.
>> 
>> Cheers
>> 
>> Lorenzo
>> On Mar 10, 2010, at 5:05 PM, Christian Hansen wrote:
>> 
>>> Dear Rooters, 
>>> 
>>> What do I do wrong then I try to use the special function  comp_ellint_1 ?
>>> 
>>> 
>>> # include "Math/SpecFunc.h"
>>> using namespace std;
>>> int main() {
>>> double K = ROOT::Math::comp_ellint_1(0.7);
>>> cout<<"K = "<<K<<endl;
>>> }
>>> 
>>> 
>>> When I compile this it says
>>> 
>>> Undefined symbols:
>>> "ROOT::Math::comp_ellint_1(double)", referenced from:
>>>    _main in test.o
>>> ld: symbol(s) not found
>>> collect2: ld returned 1 exit status
>>> make: *** [test] Error 1
>>> 
>>> 
>>> Please see the attached test program that I try to compile.
>>> 
>>> Best regards
>>> /Christian 
>>> 
>>> <test.tgz>
>> 

>
>
>
>
> On Mar 10, 2010, at 6:57 PM, Lorenzo Moneta wrote:
>

>> Hi Christian, 
>> 
>> you need to add libMathMore to the list of linked libraries.
>> 
>> Cheers
>> 
>> Lorenzo
>> On Mar 10, 2010, at 5:05 PM, Christian Hansen wrote:
>> 
>>> Dear Rooters, 
>>> 
>>> What do I do wrong then I try to use the special function  comp_ellint_1 ?
>>> 
>>> 
>>> # include "Math/SpecFunc.h"
>>> using namespace std;
>>> int main() {
>>> double K = ROOT::Math::comp_ellint_1(0.7);
>>> cout<<"K = "<<K<<endl;
>>> }
>>> 
>>> 
>>> When I compile this it says
>>> 
>>> Undefined symbols:
>>> "ROOT::Math::comp_ellint_1(double)", referenced from:
>>>    _main in test.o
>>> ld: symbol(s) not found
>>> collect2: ld returned 1 exit status
>>> make: *** [test] Error 1
>>> 
>>> 
>>> Please see the attached test program that I try to compile.
>>> 
>>> Best regards
>>> /Christian 
>>> 
>>> <test.tgz>
>> 

>
Received on Thu Mar 11 2010 - 08:54:00 CET