# Description: C subroutine library for computing discrete Fourier transform.
# URL: https://www.fftw.org/
# Maintainer: Tim Biermann, tbier at posteo dot de
# Depends on: openmpi

name=fftw
version=3.3.11
release=1
source=(http://www.fftw.org/$name-$version.tar.gz)

build() {
  cp -av $name-$version ${name}-${version}-double
  cp -av $name-$version ${name}-${version}-long-double
  cp -av $name-$version ${name}-${version}-quad

  export F77='gfortran'
  CFLAGS+=" -O3 -fomit-frame-pointer -malign-double -fstrict-aliasing -ffast-math"
  # default configure call
  _default_configure="./configure --prefix=/usr --enable-shared --enable-threads --enable-mpi --enable-openmp"

  # libtool fails to link with ccache in the path
  [ -e '/usr/bin/ccache' ] && PATH=$(echo ${PATH} | awk -v RS=: -v ORS=: '/ccache/ {next} {print}' | sed 's/:*$//')
  # configure single precision
  cd $SRC/$name-$version
  ${_default_configure} --enable-sse --enable-avx --enable-single
  sed -i -e 's/ -shared / -Wl,-O1,--as-needed\0/g' libtool

  # configure double precision
  cd $SRC/$name-$version-double
  ${_default_configure} --enable-sse2 --enable-avx
  sed -i -e 's/ -shared / -Wl,-O1,--as-needed\0/g' libtool

  # configure long-double precission
  cd $SRC/$name-$version-long-double
  ${_default_configure} --enable-long-double
  sed -i -e 's/ -shared / -Wl,-O1,--as-needed\0/g' libtool

  # configure quad precision
  cd $SRC/$name-$version-quad
  ${_default_configure} --disable-mpi --enable-quad-precision
  sed -i -e 's/ -shared / -Wl,-O1,--as-needed\0/g' libtool

  make -C $SRC/$name-$version
  make -C $SRC/$name-$version-double
  make -C $SRC/$name-$version-long-double
  make -C $SRC/$name-$version-quad

  make DESTDIR=$PKG install -C $SRC/$name-$version
  make DESTDIR=$PKG install -C $SRC/$name-$version-double
  make DESTDIR=$PKG install -C $SRC/$name-$version-long-double
  make DESTDIR=$PKG install -C $SRC/$name-$version-quad

  rm -r $PKG/usr/share/info
  rm $PKG/usr/lib/*.la
}