#!/bin/sh

# Heavily based on the Slackware 13.37 SlackBuild
# Written by Loris Vincenzi (http://www.slacky.eu) 
# Last modified from miklos < ardutu at gmail dot com >

# Slackware build script for lapack 
# Official Site: http://www.netlib.org/lapack/ 

# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

set -e

PKGNAME=lapack
VERSION=${VERSION:-3.3.1}
BUILD=${BUILD:-2}
TAG=${TAG:-sl}
ARCH=${ARCH:-x86_64}
SOURCE="http://www.netlib.org/$PKGNAME/$PKGNAME.tgz"

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

if [ ! -e $CWD/$PKGNAME.tgz ];then
  wget $SOURCE
fi

CHOST="i486"
if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  NOOPTFLAGS="-fPIC"
  LIBDIRSUFFIX="64"
  CHOST="x86_64"
fi

rm -rf $TMP
mkdir -p $TMP $PKG $OUTPUT

cd $TMP
tar xvf $CWD/$PKGNAME.tgz
cd $PKGNAME-$VERSION

chown -R root:root .
chmod -R u+w,go+r-w,a-s .

mv make.inc.example make.inc
make cleanlib
make blaslib OPTS="$SLKCFLAGS"
mv blas_LINUX.a libblas_pic.a
mkdir comp
( cd comp; ar x ../libblas_pic.a )

gfortran -shared -Wl,-soname=libblas.so.3 -o libblas.so.$VERSION comp/*.o
ln -s libblas.so.$VERSION libblas.so
rm -rf comp

make cleanlib
make blaslib 
mv blas_LINUX.a libblas.a

make cleanlib
make lapacklib OPTS="$SLKCFLAGS" NOOPT="$NOOPTFLAGS"
mv lapack_LINUX.a liblapack_pic.a
mkdir comp
( cd comp; ar x ../liblapack_pic.a )
gfortran -shared -Wl,-soname=liblapack.so.3 -o liblapack.so.$VERSION comp/*.o -L. -lblas
ln -s liblapack.so.$VERSION liblapack.so

rm -rf comp
make cleanlib
make lapacklib
mv lapack_LINUX.a liblapack.a
mkdir -p $PKG/usr/lib$LIBDIRSUFFIX
cp liblapack.a $PKG/usr/lib$LIBDIRSUFFIX/liblapack.a
cp libblas.a $PKG/usr/lib$LIBDIRSUFFIX/libblas.a
cp liblapack.so.$VERSION $PKG/usr/lib$LIBDIRSUFFIX/liblapack.so.$VERSION
( cd $PKG/usr/lib$LIBDIRSUFFIX; ln -s liblapack.so.$VERSION liblapack.so )
cp libblas.so.$VERSION $PKG/usr/lib$LIBDIRSUFFIX/libblas.so.$VERSION
( cd $PKG/usr/lib$LIBDIRSUFFIX; ln -s libblas.so.$VERSION libblas.so )

declare -x PATH="$PATH:/usr/share/texmf/bin"
( cd INSTALL; texi2pdf --dvipdf lawn81.tex )

mkdir -p $PKG/usr/doc/$PKGNAME-$VERSION
cp -a \
  BLAS LICENSE README INSTALL/lawn81.pdf \
  $PKG/usr/doc/$PKGNAME-$VERSION

cat $CWD/$PKGNAME.SlackBuild > $PKG/usr/doc/$PKGNAME-$VERSION/$PKGNAME.SlackBuild
cat $CWD/slack-desc > $PKG/usr/doc/$PKGNAME-$VERSION/slack-desc

if [ -d $PKG/usr/man ]; then
    ( 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
    )
fi

( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs -r strip --strip-unneeded 2> /dev/null || true
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs -r strip --strip-unneeded 2> /dev/null || true
  find . | xargs file | grep "current ar archive" | cut -f 1 -d : | xargs -r strip --strip-unneeded 2> /dev/null || true
)

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

cd $PKG
chown -R root:root $PKG

if [ -x "$(which requiredbuilder 2>/dev/null)" ];then
  EXCLUDE="gcc, gcc-gfortran" requiredbuilder -y -v -s $CWD $PKG
fi

/sbin/makepkg -l y -c n $OUTPUT/$PKGNAME-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-txz}

if [ "$1" = "--cleanup" ]; then
  rm -rf $TMP
fi

