[Wien] Wien2k 13 installation without FFTW3

[michel at if.usp.br]

Dear Wien2k users,

I installed wien2k 13 in my machine and I noted that now, when we  
configure the parallel instalation, the siteconfig script asks for  
what FFTW we have installed. I have just FFTW2, so this is the one I  
chose. The instalation was sucessfull, without errors. Then I tested  
the instalation and I got an error message at mixer, saying that it  
could not find the fftw3 libraries. I thought it was strange, since I  
wanted to install using FFTW2. I looked at the Makefile for Mixer and  
at the compiler options was -DFFTW3 and at the libraries -lfftw3. So I  
changed -DFFTW3 to -DFFTW2 and -lfftw3 to -lfftw and compiled again.  
This time the calculation was sucessfull. So I tried to minimize the  
internal forces at the structure and this time I got the same error  
message at the Pairhess program. Again I looked at the Makefile and it  
was using FFTW3 instead of FFTW2. I did the same modification and the  
program run sucessfully. Now, I have two questions:

1) Can I change the Makefile at these programs so that they use FFTW2  
or do they need FFTW3?

2) Are there any other programs in which I have to change the Makefile  
manually, so that they use FFTW2 instead of FFTW3?

Thank you very much for your attention.

Best regards,

Michel Lacerda

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