#
# Platform packages for Chakra
#

pkgname=atlas-lapack
pkgver=3.8.4
_lapackver=3.4.0
pkgrel=1
pkgdesc="Complete LAPACK and BLAS implementation using optimised ATLAS routines"
url="http://math-atlas.sourceforge.net/"
depends=('gcc-libs')
makedepends=('binutils' 'sed' 'gcc-fortran')
arch=('i686' 'x86_64')
conflicts=('blas' 'lapack' 'cblas')
provides=("blas" "lapack=$_lapackver" 'cblas')
license=('custom:blas' 'custom:lapack' 'custom:atlas')
source=(http://www.netlib.org/lapack/lapack-$_lapackver.tgz http://downloads.sourceforge.net/math-atlas/atlas${pkgver}.tar.bz2 blas-license.txt atlas-license.txt lapack.patch makefile.shared.mt makefile.shared.st misdetects_i1_as_i2.patch)
md5sums=('02d5706ec03ba885fc246e5fa10d8c70'
         '1bb3abde499b492b4be1f1a0759fbfa2'
         '38b6acb8ed5691d25863319d30a8b365'
         '4903eb06072dfbf94710691ccb6660bf'
         'c681f11a9e17d31247570a26e266a506'
         '235db0272fc5a17100115d5c45f29700'
         '16691a5b602dcb5a20abc525b2ae9cfc'
         '628b8f61b0403f23558ce6bf4c723bbc')

build() {

   NCPU=`grep "^processor" /proc/cpuinfo | wc -l`
   [ -x /usr/bin/cpufreq-info ] && [ $(cpufreq-info -d) != '' ] && {
       ICPU=0
       while [ $ICPU -lt $NCPU ]; do
          STATUS=`cpufreq-info -c $ICPU -p | cut -d' ' -f3`
          [ "$STATUS" != "performance" ] && {
             msg 'Before building this package, as root you must run'
             msg '"cpufreq-set -g performance -c <CPU nr>" for each CPU (<CPU'
             msg 'nr> is 0, 1, 2 up to the number of your CPUS.'
             return 1
          }
          let ICPU=ICPU+1
       done
   }
   if [ "$CARCH" = "x86_64" ]; then
      ARCHITECTURE_BUILD_OPTS="-b 64" # for x86_64
   else
      ARCHITECTURE_BUILD_OPTS="-b 32" # for i686
   fi

   mkdir -p "$srcdir/ATLAS/build"
   cd "$srcdir/ATLAS"
   patch -p0 -i "$srcdir/misdetects_i1_as_i2.patch"
   cd "$srcdir/ATLAS/build"

   msg 'Determine compiler and options for LAPACK'
   ../configure --prefix=/usr/ $ARCHITECTURE_BUILD_OPTS -Fa alg -fPIC
   FORTRAN=`grep "F77 =" Make.inc|sed -e 's/ *F77 = //'`
   FORTRANOPS=`grep "F77FLAGS =" Make.inc|sed -e 's/ *F77FLAGS = //'`
   NOPTS=`echo $FORTRANOPS|sed -e 's/-O[0-9]/-O0/'`

   msg 'Build LAPACK'
   cd "$srcdir/lapack-$_lapackver"
   cp INSTALL/make.inc.gfortran make.inc
   patch -Np0 -i "$srcdir/lapack.patch"
   make FORTRAN=$FORTRAN OPTS="$FORTRANOPS" NOOPT="$NOPTS" lib
   LAPACKLIB="$srcdir/lapack-$_lapackver/liblapack.a"

   msg 'Build ATLAS'
   cd "$srcdir/ATLAS/build"
   rm -rf *
   ../configure --prefix=/usr/ $ARCHITECTURE_BUILD_OPTS -Fa alg -fPIC \
      --with-netlib-lapack="$LAPACKLIB"
   make -j1 build
   make -j1 check
   make -j1 time
   msg 'Build shared libraries'
   cd lib
   if [ 1 -lt $NCPU ]; then
      cp "$srcdir/makefile.shared.mt" makefile
   else
      cp "$srcdir/makefile.shared.st" makefile
   fi
   make -f makefile
}

package() {

   NCPU=`grep "^processor" /proc/cpuinfo | wc -l`

   cd "$srcdir/ATLAS/build"
   make DESTDIR="$pkgdir/usr" install
   cp -d lib/*.so* "$pkgdir/usr/lib"
   cd "$pkgdir/usr/lib"
   if [ 1 -lt $NCPU ]; then
      mv -f libptcblas.a libcblas.a
      mv -f libptf77blas.a libf77blas.a
   else
      rm -f *pt*
   fi
   ln -s libf77blas.so libblas.so.3
   ln -s liblapack.so.$_lapackver liblapack.so.3
   ln -s liblapack.so.3 liblapack.so

   install -Dm644 "${srcdir}/blas-license.txt" \
      "${pkgdir}/usr/share/licenses/$pkgname/blas-license.txt"
   install -Dm644 "${srcdir}/lapack-$_lapackver/LICENSE" \
      "${pkgdir}/usr/share/licenses/$pkgname/lapack-license.txt"
   install -Dm644 "${srcdir}/atlas-license.txt" \
      "${pkgdir}/usr/share/licenses/$pkgname/atlas-license.txt"
}