# $Id: PKGBUILD 136896 2011-09-02 17:27:59Z ronald $
# Maintainer: Ronald van Haren <ronald.archlinux.org>
# Contributor: damir <damir@archlinux.org>

pkgname=fftw
pkgver=3.3
pkgrel=1
pkgdesc="A library for computing the discrete Fourier transform (DFT)"
arch=('i686' 'x86_64')
license=('GPL2')
url="http://www.fftw.org/"
depends=('glibc' 'bash')
makedepends=('gcc-fortran')
options=(!libtool)
source=(http://www.fftw.org/${pkgname}-${pkgver}.tar.gz)
install=fftw.install
sha1sums=('e44493ba4babeacba184568e727876d9aed44205')

# notes:
# http://www.fftw.org/fftw2_doc/fftw_6.html#SEC69
# http://www.fftw.org/faq/section2.html#singleprec
# http://www.fftw.org/fftw3_doc/Precision.html#Precision


build() {
  cd ${srcdir}/${pkgname}-${pkgver}

  # 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=/usr \
                 --enable-shared --enable-threads"

  # build & install double precision
  $CONFIGURE --enable-sse2
  make
  make DESTDIR=${pkgdir} install
  make clean 

  # build & install long double precission
  $CONFIGURE --enable-long-double
  make
  make DESTDIR=${pkgdir} install
  make clean

  # build & install single precision
  $CONFIGURE --enable-float --enable-sse
  make
  make DESTDIR=${pkgdir} install
}