Installation

See the download page for a version of Fleur including Wannier functions.
The Library of the Wannier90 Program libwannier.a has to be linked to the Fleur program during compilation. Download the source of Wannier90 (version v1.1) at http://www.wannier.org/ and compile both the Wannier90 program and the library libwannier.a. As described in the wannier90 documentation, you need a file make.sys corresponding to the compiler and libraries specific to your computer. However, if you use the Juelich computer cluster or Juelich super computers, you may also find appropriate files make.sys here.
Add the line "#define wann" into the file "Imakefile" and run imake. Then run make to compile FLEUR.
For the calculation of Wannier functions, the full Brillouin zone is needed. To generate the corresponding k-point files, it is sometimes convenient to use an external k-point generator instead of the one included in the Fleur program. You may generate a k-point set using the following Fortran programs: kpointgen generates the kpts file and w90kpointgen generates the w90kpts file.