[Pw_forum] linking FFTW

[Eyvaz Isaev]

Dear Ilyes,

It seems you compiled your FFTW library without
--enable-shared flags during configuration. 
So, you should clean your FFTW directory (make clean)
and then type ./configure --enable-shared (default is
no dynamical libraries).
Another way (probably more easy) is edit make.sys file
and put /your/path/to_fftw/libfftw.a instead -lfftw.

Regards,
Eyvaz Isaev
Theoretical Physics Department
NMoscow Steel and Aloys Institute
 
--- ilyes hamdi <ilyeshamdi at yahoo.fr> wrote:
> Hi 
> I 'm a beginner with PWSF, I download the last
> version
> pw.1.2.0 and i try to compile  it with atlas
> libraries, first i compile and modify my atlas
> libraries to get the full lapack library, this
> directory is
> "Home/ilyes/ATLAS/lib/Linux_P4SSE2" .i downlowd the
> fftw2 rpm for linux and i install it.
> The directoy of installation of fftw is
> "/usr/local/lib". My compiler is intel compiler 7.0,
> i
> followed 
> the instructions  in the manual to avoid I/O
> incompatibility.then my make.sys appears like this:
>
--------------------------------------------------------------------------
> CPPFLAGS = -I$(OSHOME)/include/ -DPC -DMKL -DFFTW  \
>            -D"FFTWND_F77_ONE=fftwnd_f77_one_" \
>           
> -D"FFTW3D_F77_CREATE_PLAN=fftw3d_f77_create_plan_" \
>            -D"FFTW_F77=fftw_f77_" \
>           
> -D"FFTW_F77_CREATE_PLAN=fftw_f77_create_plan_"
> #
> # Fortran compiler:
> #
> F90 = ifc
> #
> # fortran options:
> # -Vaxlib         enables the use of portability
> libraries (getarg
> #                 and maybe other library calls)
> # -W0             disable warnings
> # -O3             more aggressive optimization
> # -tpp5           Pentium    optimization
> # -tpp6           Pentium Pro, 2, 3  optimization
> # -tpp7           Pentium 4  optimization
> #
> FFLAGS =-Vaxlib -O2 -tpp7
> 
> F90FLAGS= $(FFLAGS) -fpp $(CPPFLAGS)
> #
> # This is needed to tell the compiler where modules
> are
> # use this for version < 7
> # MODULEFLAG= -cl,./intel.pcl
> # use this for version = 7
> MODULEFLAG= -nomodule -I $(OSHOME)/Modules
> -I$(OSHOME)/PW -I$(OSHOME)/PH
> #
> # Loader:
> #
> # The following is for Intel MKL libraries v. 5.1 on
> Pentium-4
> # (remember -DMKL in CPPFLAGS !)
> # For MKL v. 5.2, add "-lguide"
> # Use libmkl_p3 for Pentium-3, libmkl_p4.a for
> Pentium-4 machines
> # (MKL will likely not work for other CPUs like
> Athlon)
> #
> #LIBS= -lfftw /opt/intel/mkl/lib/32/libmkl_lapack.a
> \
>       /opt/intel/mkl/lib/32/libmkl_p4.a -lpthread
> #
> # The following is for Atlas optimized blas/lapack
> libraries
> # You may not actually need -lcblas . See the manual
> for details
> # on how to fix I/O incompatibility problems with
> ifc
> #
>  LIBS = -lfftw  -L$(HOME)/ATLAS/lib/Linux_P4SSE2/
> -llapack -lf77blas -lcblas -latlas
> #
> LD=$(F90)
> LFLAGS = -Vaxlib $(LIBS)
> 
> #
> # ar:
> #
> AR = ar
> ARFLAGS = ruv
>
--------------------------------------------------------------------------------------------
> the compilation was succesful and i get pw.x in PW/,
> but when excute the program, i got this message:
> "PW/pw.x: error while loading shared libraries:
> libfftw.so.2: cannot open shared object file: No
> such
> file or directory"
> How can i link the FFTW libraries in make.sys.
> THANK you for HELP.
> 
> 
>
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