#!/bin/bash
ulimit -s unlimited
shopt -s extglob

# openblas.SlackBuild
# Heavily based on the original Slackware build scripts,
# Modified by Stuart Winter for Slackware ARM.
#
# Copyright 2025  Patrick J. Volkerding, Sebeka, Minnesota, USA
# All rights reserved.
#
# 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.

# Record toolchain & other info for the build log:
slackbuildinfo

# Paths to skeleton port's source & real Slackware source tree:
slackset_var_cwds

# Detect whether we're building for /patches:
# This function sets the variable 'SLACKPATCHING'
slack_findpkgstore_is_stablerelease

# Temporary build locations:
shm_tmp # Use /dev/shm if >8GB RAM is available & not mounted 'noexec'
export TMPBUILD=$TMP/build-$PKGNAM
export PKG=$TMP/package-$PKGNAM
mkpkgdirs # Delete & re-create temporary directories then cd into $TMPBUILD

# Versions of bundled packages:
# To save on maintenance, and since we carry the same versions as x86 Slackware,
# let's pull the version numbers from the x86 trunk:
slack_setvarfromupstream SRCNAM

# Use GENERIC CPU target:
# Note: on x86 and x86_64 these are set to other values.
TARGET=${TARGET:-GENERIC}

# Extract source:
tar xf $CWD/$SRCNAM-$VERSION.tar.!(*sign|*asc|*sig)
cd $SRCNAM-*/ || failextract
slackhousekeeping

# Determine the lapack version:
LAPACKMAJ=$(grep 'set(OpenBLAS_MAJOR_VERSION ' CMakeLists.txt  |tr -s '()' ' '  |cut -d' ' -f3)
LAPACKMIN=$(grep 'set(OpenBLAS_MINOR_VERSION ' CMakeLists.txt  |tr -s '()' ' '  |cut -d' ' -f3)
LAPACKPAT=$(grep 'set(OpenBLAS_PATCH_VERSION ' CMakeLists.txt  |tr -s '()' ' '  |cut -d' ' -f3)
LAPACK="${LAPACKMAJ}.${LAPACKMIN}.${LAPACKPAT}"

# Remove "-j" from the jobs, since it's superflous here:
NUMJOBS="${NUMJOBS#-j}"

# Build:
make \
   PREFIX=/usr \
   MAKE_NB_JOBS=${NUMJOBS} \
   OPENBLAS_LIBRARY_DIR=/usr/lib$LIBDIRSUFFIX \
   TARGET=$TARGET \
   DYNAMIC_ARCH=1 \
   NO_STATIC=1 \
   USE_THREAD=1 \
   NUM_THREADS=64 \
   USE_OPENMP=1 \
   USE_TLS=1 \
   NO_LAPACK=0 \
   BUILD_LAPACK_DEPRECATED=1 \
   NO_AFFINITY=1 \
   BUILD_RELAPACK=1 || failmake

# Install into package:
make \
   PREFIX=/usr \
   MAKE_NB_JOBS=${NUMJOBS} \
   OPENBLAS_LIBRARY_DIR=/usr/lib$LIBDIRSUFFIX \
   TARGET=$TARGET \
   DYNAMIC_ARCH=1 \
   NO_STATIC=1 \
   USE_THREAD=1 \
   NUM_THREADS=64 \
   USE_OPENMP=1 \
   USE_TLS=1 \
   NO_LAPACK=0 \
   BUILD_LAPACK_DEPRECATED=1 \
   BUILD_RELAPACK=1 \
   NO_AFFINITY=1 \
   DESTDIR=$PKG \
   install || failinstall

# Install compatibility symlinks:
# For BLAS:
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/libblas.so
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/libblas.so.${LAPACKMAJ}
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/libblas.so.${LAPACK}
ln -vfs openblas.pc $PKG/usr/lib$LIBDIRSUFFIX/pkgconfig/blas.pc
# For CBLAS:
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/libcblas.so
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/libcblas.so.${LAPACKMAJ}
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/libcblas.so.${LAPACK}
ln -vfs openblas.pc $PKG/usr/lib$LIBDIRSUFFIX/pkgconfig/cblas.pc
# For LAPACK:
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/liblapack.so
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/liblapack.so.${LAPACKMAJ}
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/liblapack.so.${LAPACK}
ln -vfs openblas.pc $PKG/usr/lib$LIBDIRSUFFIX/pkgconfig/lapack.pc
# For LAPACKE:
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/liblapacke.so
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/liblapacke.so.${LAPACKMAJ}
ln -vfs libopenblasp-r${VERSION}.so $PKG/usr/lib$LIBDIRSUFFIX/liblapacke.so.${LAPACK}
ln -vfs openblas.pc $PKG/usr/lib$LIBDIRSUFFIX/pkgconfig/lapacke.pc

# Usually empty:
rmdir $PKG/usr/bin

# Add documentation:
mkdir -vpm755 $PKG/usr/doc/$PKGNAM-$VERSION
cp -fav \
  BACKERS* CONTRIBUTORS* Changelog.txt GotoBLAS* LICENSE* README* SECURITY* USAGE* \
  $PKG/usr/doc/$PKGNAM-$VERSION
changelogliposuction ChangeLog.txt $PKGNAM $VERSION # Trim down a "ChangeLog" file

# Apply generic Slackware packaging policies:
cd $PKG
slackstripall        # strip all .a archives and all ELFs
#slackstriprpaths     # strip rpaths
slack_delete_lafiles # delete usr/lib{,64}/*.la
slackgzpages -i      # compress man & info pages and delete usr/info/dir
slackslack           # set standard Slackware file/dir permissions and ownerships
slackdesc            # install slack-desc and doinst.sh
slackmp         # run makepkg -l y -c n

# Perform any final checks on the package:
cd $PKG
slackhlinks     # search for any hard links