#!/bin/sh

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

PRGNAM=fftw
VERSION=${VERSION:-3.2.2}
BUILD=${BUILD:-1}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i486 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp}
PKG=$TMP/package-$PRGNAM-$VERSION
OUTPUT=${OUTPUT:-/tmp}

DOCS="AUTHORS CONVENTIONS COPY* INSTALL NEWS README* TODO doc/html"

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

if [ "${PORTABLE:-yes}" = "no" ]; then
    # According to doc/fftw3.pdf the configure script should choose the best
    # value for $CFLAGS.  These variables must be unset so that the configure
    # script will decide.

    # If you are interested in further optimizations such as alternative
    # multithreading and support for other processors, check this page for
    # details:
    # http://www.fftw.org/fftw3_doc/Installation-on-Unix.html
    unset CFLAGS
    unset CXXFLAGS
    unset FFLAGS
    PKGARCH="custom"
    do_portable=""
else
    PKGARCH=$ARCH
    do_portable="--enable-portable-binary"
fi

if [ "${SSE:-no}" = "no" ]; then
    do_sse=""
else
    do_sse="--enable-sse"
fi

if [ "${SSE2:-no}" = "no" ]; then
    do_sse2=""
else
    do_sse2="--enable-sse2"
fi

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.?z* || exit 1
cd $PRGNAM-$VERSION
chown -R root:root .
chmod -R u+w,go+r-w,a-st .

# compile libfftw3
./configure \
    --prefix=/usr \
    --libdir=/usr/lib${LIBDIRSUFFIX} \
    --sysconfdir=/etc \
    --localstatedir=/var \
    --mandir=/usr/man \
    --infodir=/usr/info \
    --docdir=/usr/doc/fftw-$VERSION \
    --enable-shared \
    --disable-static \
    --enable-threads \
    $do_sse2 \
    $do_portable
make -j4 || exit 1
make install-strip DESTDIR=$PKG || exit 1

# compile libfftw3f
./configure \
    --prefix=/usr \
    --libdir=/usr/lib${LIBDIRSUFFIX} \
    --sysconfdir=/etc \
    --localstatedir=/var \
    --mandir=/usr/man \
    --infodir=/usr/info \
    --docdir=/usr/doc/fftw-$VERSION \
    --enable-shared \
    --disable-static \
    --enable-threads \
    --enable-float \
    $do_sse \
    $do_portable
make -j4 || exit 1
make install-strip DESTDIR=$PKG || exit 1

# compile libfftw3l
./configure \
    --prefix=/usr \
    --libdir=/usr/lib${LIBDIRSUFFIX} \
    --sysconfdir=/etc \
    --localstatedir=/var \
    --mandir=/usr/man \
    --infodir=/usr/info \
    --docdir=/usr/doc/fftw-$VERSION \
    --enable-shared \
    --disable-static \
    --enable-threads \
    --enable-long-double \
    $do_portable
make -j4 || exit 1
make install-strip DESTDIR=$PKG || exit 1

( 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/*

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a $DOCS $PKG/usr/doc/$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.txz