Makefile compiling about poisfft

[LadaF]

This is a linking issue. If you are using the dynamic version of the library you also have to link with libfftw and libfftwf.

Also, PoisFFT is by default compiled with OpenMP enabled. You can either disable it with scons openmp=no or you have to also link with libfftw_omp and libfftwf_omp and also compile your code with OpenMP or link with libgomp. I suggest to start with OpenMP disabled.

[LadaF]

I do not recommend compiling your code with -fdefault-real-8. It may work, but the library was not tested that way. Be sure to use the correct double precision solver.

[Mattiads1]

Thanks, I follow all your advice and I solved my problem.
I'm not very familiar compilation and linking.
I have another question.
From what I understand by default when I run with 'scons openmp=no', it create a dynamic library. How can I do if I want a static library?

[LadaF]

No, that is not correct. With 'scons openmp=no' you just disable OpenMP, but both libraries are created, one dynamic .so and one static .a. It is up to you and the settings in your Makefile which one of them you will use. Note that you will have to supply the other necessary libraries in both cases.

[Mattiads1]

I don't find the static .a libary.
When I run 'scons openmp=no' it creates two directories: one is bin/gcc/ where the files.mod and files.os are located; the other one is /lib/gcc/ where only the file libpoisfft.so is present.

While when I run 'scons test' it create only one directory: bin/gcc/ where files.mod and files.o are created.

[LadaF]

You are right the line in the [SConstruct] file is commented out. If you want a static library, you can currently comment out line 220, uncomment 221 and remove the lib + .

[LadaF]

I added a new target to SConstruct. You can just do scons static_lib to get the static library.

[Mattiads1]

Thanks