#!/bin/bash
ulimit -s unlimited
shopt -s extglob
# Fail on undeclared variables and broken pipes:
#set -u -o pipefail

# opencv.SlackBuild
# Heavily based on the original Slackware build scripts,
# Modified by Stuart Winter for Slackware ARM.
#
# Copyright 2015, 2017, 2019  Eric Hameleers, Eindhoven, NL
# Copyright 2020-2026  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

# Temporary build locations:
export TMPBUILD=$TMP/build-$PKGNAM
export PKG=$TMP/package-$PKGNAM
mkpkgdirs # Delete & re-create temporary directories then cd into $TMPBUILD

# Extract source:
tar xf $CWD/$PKGNAM-$VERSION.tar.!(*sign|*asc|*sig)
cd $PKGNAM-$VERSION || failextract
tar xf $CWD/${PKGNAM}_contrib-${VERSION}.tar.?z || failextract
slackhousekeeping

# Apply patches:
#auto_apply_patch $PORTCWD/sources/gcc11.patch || failpatch

# Allow build to use CMake 4.x:
export CMAKE_POLICY_VERSION_MINIMUM=3.5

# Broken build without this?
BROKEN="-DOpenGL_GL_PREFERENCE=LEGACY"

# Configure:
mkdir cmake-build
pushd cmake-build
cmake \
   $BROKEN \
   -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
   -DCMAKE_C_FLAGS_RELEASE:STRING="$SLKCFLAGS" \
   -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
   -DCMAKE_CXX_FLAGS_RELEASE:STRING="$SLKCFLAGS" \
   -DCMAKE_BUILD_TYPE="Release" \
   -DCMAKE_INSTALL_PREFIX=/usr \
   -DINSTALL_MAN_DIR=man \
   -DINSTALL_DOC_DIR=doc/$PKGNAM-$VERSION \
   -DSYSCONF_INSTALL_DIR=/etc \
   -DLIB_INSTALL_DIR=/usr/lib${LIBDIRSUFFIX} \
   -DCMAKE_INSTALL_LIBDIR=lib${LIBDIRSUFFIX} \
   -DBUILD_CUDA_STUBS=OFF \
   -DBUILD_PACKAGE=OFF \
   -DBUILD_PERF_TESTS=OFF \
   -DBUILD_SHARED_LIBS=ON \
   -DBUILD_TESTS=OFF \
   -DBUILD_WITH_DEBUG_INFO=OFF \
   -DENABLE_PRECOMPILED_HEADERS=OFF \
   -DWITH_CUDA=OFF \
   -DWITH_FFMPEG=ON \
   -DWITH_GDAL=OFF \
   -DWITH_IPP=OFF \
   -DWITH_OPENGL=ON \
   -DWITH_OPENMP=ON \
   -DWITH_QT=ON \
   -DOPENCV_ENABLE_NONFREE=ON \
   -DOPENCV_EXTRA_MODULES_PATH=../${PKGNAM}_contrib-$VERSION/modules \
   -DOPENCV_GENERATE_PKGCONFIG=ON \
   -DOPENCV_JNI_INSTALL_PATH=lib${LIBDIRSUFFIX} \
   \
   -DCPU_BASELINE_DISABLE=SSE3 \
   -DCPU_BASELINE_ENABLE=SSE2 \
   \
   -DCMAKE_CXX_STANDARD=17 \
   \
   .. || failconfig

# Build:
make VERBOSE=1 $NUMJOBS || make VERBOSE=1 || failmake

# Install into package:
make install DESTDIR=$PKG || failinstall
popd

# Add compat opencv.pc symlink:
if [ ! -r $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/opencv.pc ]; then
  ( cd $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig ; ln -sf opencv4.pc opencv.pc )
fi

# Add documentation:
mkdir -vpm755 $PKG/usr/doc/$PKGNAM-$VERSION
cp -fav \
  COPYING* README* \
  $PKG/usr/doc/$PKGNAM-$VERSION
mv -fv $PKG/usr/share/licenses $PKG/usr/doc/${PKGNAM}-$VERSION
#changelogliposuction ChangeLog $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