#!/bin/sh

# Slackware build script for fftw
# Written by Kyle Guinn <elyk03@gmail.com>

set -e

PRGNAM=fftw
VERSION=3.1.2
ARCH=i486
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar -xzvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION
chown -R root:root .
chmod -R u+w,go+r-w,a-s .

# According to doc/fftw3.pdf, the configure script should choose the best value
# for $CFLAGS.  We will assume that the script knows what it is doing.
#
# By default we will leave out these machine-dependent optimizations.  If your
# machine supports these, feel free to add them to the configure options.
# --enable-fma      enable optimizations for machines with fused multiply-add
# --enable-k7       enable AMD K7 optimizations, including 3dNow!
# --enable-sse      enable SSE optimizations (Pentium III+)
# --enable-sse2     enable SSE2 optimizations (Pentium IV+)
# --enable-altivec  enable Altivec optimizations (PowerPC G4+)
# --enable-portable-binary
#                   disable compiler optimizations that would produce
#                   unportable binaries
#
# You can also build fftw using a different precision.  --enable-float may be
# required depending on any SIMD code enabled with the above options.
# --enable-single       compile fftw in single precision
# --enable-float        synonym for --enable-single
# --enable-long-double  compile fftw in long-double precision

./configure \
  --prefix=/usr \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=/usr/man \
  --infodir=/usr/info \
  --docdir=/usr/doc/fftw-$VERSION \
  --enable-shared \
  --disable-static \
  --enable-threads

make
make install-strip DESTDIR=$PKG

( cd $PKG/usr/man
  find . -type f -exec gzip -9 {} \;
  for i in $(find . -type l) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
)

rm -f $PKG/usr/info/dir
gzip -9 $PKG/usr/info/*.info*

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a AUTHORS CONVENTIONS COPYING COPYRIGHT ChangeLog INSTALL NEWS README TODO \
  doc/html \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.tgz