# Maintainer: Ronald van Haren <ronald.archlinux.org>
# Contributor: David Runge <dvzrv@archlinux.org>
# Contributor: damir <damir@archlinux.org>

# ALARM: Kevin Mihelich <kevin@archlinuxarm.org>
#  - removed -malign-double from CFLAGS
#  - removed --enable-sse from single precision
#  - removed --enable-sse2, --enable-avx from double precision
#  - removed quad precision variant

pkgname=fftw
pkgver=3.3.8
pkgrel=2
pkgdesc="A library for computing the discrete Fourier transform (DFT)"
arch=('x86_64')
license=('GPL2')
url="http://www.fftw.org/"
depends=('bash' 'gcc-libs' 'glibc' 'openmpi')
makedepends=('gcc-fortran')
provides=('libfftw3q_threads.so' 'libfftw3q_omp.so' 'libfftw3q.so'
'libfftw3l_threads.so' 'libfftw3l_omp.so' 'libfftw3l_mpi.so' 'libfftw3l.so'
'libfftw3f_threads.so' 'libfftw3f_omp.so' 'libfftw3f_mpi.so' 'libfftw3f.so'
'libfftw3_threads.so' 'libfftw3_omp.so' 'libfftw3_mpi.so' 'libfftw3.so')
# makedepends=('gcc-fortran' 'ocaml' 'ocaml-num' 'ocamlbuild')
source=("http://www.fftw.org/${pkgname}-${pkgver}.tar.gz")
# source=("https://github.com/${pkgname}/fftw3/archive/${pkgname}-${pkgver}.tar.gz")
sha512sums=('ab918b742a7c7dcb56390a0a0014f517a6dff9a2e4b4591060deeb2c652bf3c6868aa74559a422a276b853289b4b701bdcbd3d4d8c08943acf29167a7be81a38')

prepare() {
# issue with ocaml-num
#  mv -v "fftw3-${pkgname}-${pkgver}" "${pkgname}-${pkgver}"
#  (
#    cd "$pkgname-$pkgver"
#    cp -v NEWS ChangeLog
#    autoreconf -vfi
#  )
  cp -av "${pkgname}-${pkgver}" "${pkgname}-${pkgver}-double"
  cp -av "${pkgname}-${pkgver}" "${pkgname}-${pkgver}-long-double"
  cp -av "${pkgname}-${pkgver}" "${pkgname}-${pkgver}-quad"
}

build() {
  export F77='gfortran'
  # use upstream default CFLAGS while keeping our -march/-mtune
  CFLAGS+=" -O3 -fomit-frame-pointer -fstrict-aliasing -ffast-math"
  # default configure call
  _default_configure="./configure --prefix=/usr --enable-shared --enable-threads --enable-mpi --enable-openmp"

  # configure single precision
  (
    cd "${pkgname}-${pkgver}"
    ${_default_configure} --enable-single
  )

  # configure double precision
  (
    cd "${pkgname}-${pkgver}-double"
    ${_default_configure}
  )

  # configure long-double precission
  (
    cd "${pkgname}-${pkgver}-long-double"
    ${_default_configure} --enable-long-double
  )

  make -C "${pkgname}-${pkgver}"
  make -C "${pkgname}-${pkgver}-double"
  make -C "${pkgname}-${pkgver}-long-double"
}

package() {
  make DESTDIR="${pkgdir}" install -C "${pkgname}-${pkgver}"
  make DESTDIR="${pkgdir}" install -C "${pkgname}-${pkgver}-double"
  make DESTDIR="${pkgdir}" install -C "${pkgname}-${pkgver}-long-double"
  cd "${pkgname}-${pkgver}"
  install -vDm 644 {AUTHORS,ChangeLog,NEWS,README,TODO} \
    -t "${pkgdir}/usr/share/doc/${pkgname}"
}