[Pw_forum] Setup Problems!

Gerardo Ballabio g.ballabio at cineca.it
Wed May 25 12:26:14 CEST 2005

On 05/25/05 11:59:22, Gemini Sampson wrote:
> The following libraries have been found:
>   LIBS= -lf77blas -latlas -lg2c -L/home/pwscf/lib -lfftw
>   WARNING: fftw library detected, but fftw.h not found
> It cannot find "zggev","fftwnd","fftw.h".Is it important?
> Where can I get them?

This means that configure wasn't able to find working Lapack and FFTW  
libraries on your system. The Espresso distribution does contain a  
portable implementation of these libraries, so you can still compile  
and run it. However if you can obtain and use versions of these  
libraries optimized for your machine, you may experience significant  
performance improvements.

If these libraries do exist on your system, but configure isn't able  
to detect them, you may give it some hints. The Espresso User's Guide  
(in the Doc directory of the Espresso distribution, or online at  
www.pwscf.org) tells you how.

In fact, an fftw library has been found, but configure failed to  
locate the corresponding fftw.h file. This means that either your  
installation of FFTW is incomplete, or configure just looked in the  
wrong directories. Again, read the Espresso User's Guide for how to  
troubleshoot this.


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