Hi,<br><br>I installed fftw as follows (creating single- and double-precision versions) :<br>
<br>
./configure --enable-threads --enable-float --prefix=/home/kudesias/fftw<br>
make<br>
make install<br>
<br>
make distclean<br>
<br>
./configure --enable-threads --prefix=/home/kudesias/fftw<br>
make<br>
make install<br><br>I also used <br>export CPPFLAGS=-I/home/kudesias/fftw/include<br><div>export LDFLAGS=-L/home/kudesias/fftw/lib ( Initially I used I in place of L so I corrected it)<br>
</div><br><font color="#888888">
</font>On using the configure script <br>
<br>
./configure --enable-mpi<br>
<br> I get the following error then <br>
<br>
checking how to hardcode library paths into programs... immediate<br>
checking for special C compiler options needed for large files... no<br>
checking for _FILE_OFFSET_BITS value needed for large files... no<br>
checking for _LARGEFILE_SOURCE value needed for large files... 1<br>
checking for sqrt in -lm... yes<br>
checking for fftw3.h... configure: error: Cannot find the default external FFT library (fftw3). <br>
<br>
I will be glad if you can help with this. <br>
<br>
Thanks <br>
<br><br><div class="gmail_quote">On Thu, Jun 25, 2009 at 2:08 AM, Florian Dommert <span dir="ltr"><<a href="mailto:dommert@icp.uni-stuttgart.de" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">dommert@icp.uni-stuttgart.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">* Shobhit Kudesia <<a href="mailto:shobhit.kudesia@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">shobhit.kudesia@gmail.com</a>> [2009-06-25 01:55:00 +0530]:<div>
<div></div><div><br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi ,<br>
<br>
During the ./configure of gromacs on my Bash Shell, I get the following error:<br>
<br>
configure: error: Cannot find fftw3f library<br>
<br>
I have installed fftw3 files in a directory other than usr/local. I<br>
have installed fftw3 both with double and single precision but I still<br>
get the error while configuration of GROMACS for default single<br>
precision. I have also included the libraries usinG CPPFLAGS &<br>
LDFLAGS.<br>
</blockquote>
<br></div></div>
If you have installed the single version of FFTW3 and supply the<br>
corresponding CPPFLAGS and LDFLAGS to configure then the script will<br>
find the libraries. So two errors are very likely though we do not<br>
anything about your installation:<br>
<br>
* a small typo in the configure line ( if you present it here, everybody can<br>
judge this )<br>
<br>
* the installation of the single precision fftw3f failed for any reasons<br>
<br>
Flo<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div>
<br>
Any help will be appreciated<br></div>
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</blockquote>
<br>
-- <br>
Florian Dommert<br>
Dipl.-Phys.<br>
<br>
Institute for Computational Physics<br>
University Stuttgart<br>
<br>
Pfaffenwaldring 27<br>
70569 Stuttgart<br>
<br>
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<br>
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<br><br clear="all"><br>-- <br><br><br>With Warm Regards<br>
Shobhit Kudesia<br>3rd year Undergraduate<br>Department of Biotechnology<br>IIT Kharagpur<br>