On Fri, Dec 13, 2019 at 2:22 PM Kai Torben Ohlhus <
address@hidden> wrote:
On 12/13/19 5:39 PM, niraj pandey wrote:> On Fri, Dec 13, 2019 at 1:19
PM Kai Torben Ohlhus <address@hidden
> <mailto:address@hidden>> wrote:
>
>
>
> On 12/13/19 3:48 PM, niraj pandey wrote:
> > On Fri, Dec 13, 2019 at 12:14 PM Kai Torben Ohlhus
> <address@hidden <mailto:address@hidden>>
> >> On 12/13/19 3:14 PM, niraj pandey wrote:
> >>> Hi ,
> >>>
> >>> Could you pls help me how to build octave with fft support. I
> used the
> >>> following command to build octave but still getting issue.
> >>>
> >>>
> >>> octave:1> fft(0:255)
> >>> error: fft: support for FFTW was unavailable or disabled when
> liboctave
> >>> was built
> >>>
> >>>
> >>> ./configure --prefix=/home/niraj/oc CFLAGS=-fPIC CXXFLAGS=-fPIC
> >>> --enable-shared --with-gui --with-qt
> >>> --with-blas=/v5.1.0/BLAS-3.8.0/blas_LINUX.a
> >>> --with-lapack=/v5.1.0/lapack-3.8.0/liblapack.a --enable-float
> >>> --enable-sse --with-fftw3-includedir=/tmp/fftw/include/
> >>> --with-fftw3-libdir=/tmp/fftw/lib
> >>>
> >>> Config.log says: configure:69014: WARNING: FFTW3 library not
> found.
> >>> The slower FFTPACK library will be used instead.
> >>>
> >>> Thanks
> >>> Niraj
> >>
> >> Dear Niraj,
> >>
> >> Still I do not understand why you deploy libraries in the "/tmp"
> >> directory, which is on usual Linux system a volatile TeMPorary
> >> directory. Can't you use your user's /home/niraj directory for all
> >> libraries instead? This might be one root of trouble.
> >>
> >> Can you describe, how you installed the FFTW3 library on your system?
> >>
> >> HTH,
> >> Kai
> >>
> >
> > Hello Kai,
> >
> > I used the following command to install FFTW3.
> >
> > ./configure --prefix=/home/niraj/fftw --enable-float --enable-sse
> >
> > To install the tool on /tmp area first is just check all the
> > dependencies required by that tool . Once I identify all the
> > dependencies I install the tool on production area through some
> > automated process :)
> >
> > Thanks
> > Niraj
>
> Can you submit a small portion of config.log around the error
>
> >>> configure:69014: WARNING: FFTW3 library not found.
>
> Usually there is a program which is compiled during ./configure and this
> normally contains the compiler output which might be helpful to get to
> the root of the trouble.
>
> Best,
> Kai
>
>
> Hi Kai,
>
> PFA config.log files for fftw and octave .
>
> Thanks
> Niraj
>
Please always answer below the text. The interesting portion is this:
$ ./configure --prefix=/home/niraj/oc CFLAGS=-fPIC CXXFLAGS=-fPIC
--enable-shared --with-gui --with-qt
--with-blas=common/pkgs/octave/v5.1.0/BLAS-3.8.0/blas_LINUX.a
--with-lapack=common/pkgs/octave/v5.1.0/lapack-3.8.0/liblapack.a
--enable-float --enable-sse --with-fftw3-includedir=/tmp/fftw/include/
--with-fftw3-libdir=/tmp/fftw/lib
configure:68911: $? = 1
configure:68936: checking fftw3.h usability
configure:68936: gcc -std=gnu11 -c -fPIC -pthread -fopenmp
-I/tmp/fftw/include/ conftest.c >&5
configure:68936: $? = 0
configure:68936: result: yes
configure:68936: checking fftw3.h presence
configure:68936: gcc -std=gnu11 -E -I/tmp/fftw/include/ conftest.c
configure:68936: $? = 0
configure:68936: result: yes
configure:68936: checking for fftw3.h
configure:68936: result: yes
configure:68947: checking for fftw_plan_dft_1d in -lfftw3
configure:68978: gcc -std=gnu11 -o conftest -fPIC -pthread -fopenmp
-I/tmp/fftw/include/ -L/tmp/fftw/lib -L/tmp/fftw/lib
-Wl,-rpath=/tmp/fftw/lib conftest.c -lfftw3 -lm >&5
/usr/bin/ld: cannot find -lfftw3
collect2: error: ld returned 1 exit status
configure:68978: $? = 1
Is there in `/tmp/fftw/lib` some `libfftw3.so` or is it in
`/tmp/fftw/lib64`?
HTH,
Kai
I do not see any libfftw3.so library there. Instead of that I found "libfftw3f.so" under lib.
Thanks
Niraj
--
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