FFTW local installation

install_fftw.sh

#!/bin/bash

pkgname='fftw'
pkgver=3.3.6-pl2
srcdir=$PWD
pkgdir='$HOME/.local/share/fftw'

download() {
  cd ${srcdir}

  if [ ! -f $pkgname-$pkgver.tar.gz ]; then
    wget http://www.fftw.org/$pkgname-$pkgver.tar.gz
  fi
  tar vxzf $pkgname-$pkgver.tar.gz
}

build() {
  cd ${srcdir}
  
  cp -a ${pkgname}-${pkgver} ${pkgname}-${pkgver}-double
  cp -a ${pkgname}-${pkgver} ${pkgname}-${pkgver}-long-double
  cp -a ${pkgname}-${pkgver} ${pkgname}-${pkgver}-single
  

  # use upstream default CFLAGS while keeping our -march/-mtune
  CFLAGS+=" -O3 -fomit-frame-pointer -malign-double -fstrict-aliasing -ffast-math"

  CONFIGURE="./configure F77=gfortran --prefix=${pkgdir} \
                 --enable-shared --enable-threads \
		 --enable-openmp \
		 --enable-mpi"

  # build double precision
  cd ${srcdir}/${pkgname}-${pkgver}-double
  $CONFIGURE --enable-sse2 --enable-avx
  make

  # build & install long double precission
  cd ${srcdir}/${pkgname}-${pkgver}-long-double
  $CONFIGURE --enable-long-double
  make

  # build & install single precision
  cd ${srcdir}/${pkgname}-${pkgver}-single
  $CONFIGURE --enable-float --enable-sse --enable-avx
  make
}

package() {
  cd ${srcdir}/${pkgname}-${pkgver}-double
  make install

  cd ${srcdir}/${pkgname}-${pkgver}-long-double
  make install

  cd ${srcdir}/${pkgname}-${pkgver}-single
  make install  
}

if [ ! -d  ${srcdir}/${pkgname}-${pkgver} ]
then
  download
fi

build
package