def _set_fftw_variables(self):
        if not hasattr(self, 'BLAS_LIB_DIR'):
            self.log.raiseException("_set_fftw_variables: IntelFFT based on IntelMKL (no BLAS_LIB_DIR found)")

        imklver = get_software_version(self.FFT_MODULE_NAME[0])

        picsuff = ''
        if self.options.get('pic', None):
            picsuff = '_pic'
        bitsuff = '_lp64'
        if self.options.get('i8', None):
            bitsuff = '_ilp64'
        compsuff = '_intel'
        if get_software_root('icc') is None:
            if get_software_root('GCC'):
                compsuff = '_gnu'
            else:
                self.log.error("Not using Intel compilers or GCC, don't know compiler suffix for FFTW libraries.")

        fftw_libs = ["fftw3xc%s%s" % (compsuff, picsuff)]
        if self.options['usempi']:
            # add cluster interface for recent imkl versions
            if LooseVersion(imklver) >= LooseVersion("11.0.2"):
                fftw_libs.append("fftw3x_cdft%s%s" % (bitsuff, picsuff))
            elif LooseVersion(imklver) >= LooseVersion("10.3"):
                fftw_libs.append("fftw3x_cdft%s" % picsuff)
            fftw_libs.append("mkl_cdft_core")  # add cluster dft
            fftw_libs.extend(self.variables['LIBBLACS'].flatten()) # add BLACS; use flatten because ListOfList

        self.log.debug('fftw_libs %s' % fftw_libs.__repr__())
        fftw_libs.extend(self.variables['LIBBLAS'].flatten())  # add BLAS libs (contains dft)
        self.log.debug('fftw_libs %s' % fftw_libs.__repr__())

        self.FFT_LIB_DIR = self.BLAS_LIB_DIR
        self.FFT_INCLUDE_DIR = self.BLAS_INCLUDE_DIR

        # building the FFTW interfaces is optional,
        # so make sure libraries are there before FFT_LIB is set
        imklroot = get_software_root(self.FFT_MODULE_NAME[0])
        fft_lib_dirs = [os.path.join(imklroot, d) for d in self.FFT_LIB_DIR]
        # filter out gfortran from list of FFTW libraries to check for, since it's not provided by imkl
        check_fftw_libs = [lib for lib in fftw_libs if lib != 'gfortran']
        fftw_lib_exists = lambda x: any([os.path.exists(os.path.join(d, "lib%s.a" % x)) for d in fft_lib_dirs])
        if all([fftw_lib_exists(lib) for lib in check_fftw_libs]):
            self.FFT_LIB = fftw_libs
        else:
            tup = (check_fftw_libs, fft_lib_dirs)
            msg = "Not all FFTW interface libraries %s are found in %s, can't set FFT_LIB." % tup
            self.log.error(msg)
    def _set_fftw_variables(self):
        if not hasattr(self, 'BLAS_LIB_DIR'):
            self.log.raiseException("_set_fftw_variables: IntelFFT based on IntelMKL (no BLAS_LIB_DIR found)")

        imklver = get_software_version(self.FFT_MODULE_NAME[0])

        fftwsuff = ""
        if self.options.get('pic', None):
            fftwsuff = "_pic"
        fftw_libs = ["fftw3xc_intel%s" % fftwsuff]
        if self.options['usempi']:
            # add cluster interface
            if LooseVersion(imklver) < LooseVersion("11.1"):
                if LooseVersion(imklver) >= LooseVersion("11.0"):
                    fftw_libs.append("fftw3x_cdft_lp64%s" % fftwsuff)
                elif LooseVersion(imklver) >= LooseVersion("10.3"):
                    fftw_libs.append("fftw3x_cdft%s" % fftwsuff)
                fftw_libs.append("mkl_cdft_core")  # add cluster dft
                fftw_libs.extend(self.variables['LIBBLACS'].flatten()) ## add BLACS; use flatten because ListOfList

        self.log.debug('fftw_libs %s' % fftw_libs.__repr__())
        fftw_libs.extend(self.variables['LIBBLAS'].flatten()) ## add core (contains dft) ; use flatten because ListOfList
        self.log.debug('fftw_libs %s' % fftw_libs.__repr__())

        self.FFT_LIB_DIR = self.BLAS_LIB_DIR
        self.FFT_INCLUDE_DIR = self.BLAS_INCLUDE_DIR

        # building the FFTW interfaces is optional,
        # so make sure libraries are there before FFT_LIB is set
        imklroot = get_software_root(self.FFT_MODULE_NAME[0])
        fft_lib_dirs = [os.path.join(imklroot, d) for d in self.FFT_LIB_DIR]
        if all([any([os.path.exists(os.path.join(d, "lib%s.a" % lib)) for d in fft_lib_dirs]) for lib in fftw_libs]):
            self.FFT_LIB = fftw_libs
        else:
            msg = "Not all FFTW interface libraries %s are found in %s, can't set FFT_LIB." % (fftw_libs, fft_lib_dirs)
            self.log.error(msg)