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

# pahole.SlackBuild
# Heavily based on the original Slackware build scripts,
# Modified by Stuart Winter for Slackware ARM.
#
# Copyright 2019 xaizek <xaizek@posteo.net>
# Copyright 2021 Piter Punk <piterpunk@slackware.com>
# Copyright 2022 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:
export TMPBUILD=$TMP/build-$PKGNAM
export PKG=$TMP/package-$PKGNAM
mkpkgdirs # Delete & re-create temporary directories then cd into $TMPBUILD

# To save on maintenance, and since we carry the same versions as x86 Slackware,
# let's pull the version numbers from the x86 trunk:
pushd $CWD
XSB=$CWD/$PKGNAM.SlackBuild
[ ! -x $XSB ] && { echo "ERROR: Cannot find x86 SlackBuild for ${PKGNAM}!" ; exit 1; }
for upstreamvar in \
  LIBBPF_VERSION \
  ; do
  eval $( grep -E "^${upstreamvar}=" $XSB  )
  echo "Upstream variable: ${upstreamvar} version $( eval $( echo "echo \$${upstreamvar}" ) )"
done
popd

# Extract source:
tar xf $CWD/$PKGNAM-$VERSION.tar.!(*sign|*asc|*sig)
cd $PKGNAM-$VERSION || failextract
tar xvf $CWD/libbpf-${LIBBPF_VERSION}.tar.?z --strip-components=1 -C lib/bpf || exit 1
slackhousekeeping

# Refresh libtool to support latest architectures:
slackupdatelibtool

# Configure:
mkdir cmake-build
pushd cmake-build
cmake \
   -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
   -DCMAKE_INSTALL_PREFIX=/usr \
   -DCMAKE_INSTALL_LIBDIR="lib${LIBDIRSUFFIX}" \
   -DCMAKE_BUILD_TYPE=Release \
   .. || failconfig

# Build:
make $NUMJOBS || make || failmake

# Install into package:
make install DESTDIR=$PKG || failinstall
mv $PKG/usr/share/man $PKG/usr/man
popd

# Add documentation:
mkdir -vpm755 $PKG/usr/doc/$PKGNAM-$VERSION
cp -fav \
  COPYING* NEWS* README* \
  $PKG/usr/doc/$PKGNAM-$VERSION
#changelogliposuction ChangeLog $PKGNAM $VERSION # Trim down a "ChangeLog" file
cd lib/bpf
mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION/libbpf-${LIBBPF_VERSION}
cp -a BPF-CHECKPOINT-COMMIT* CHECKPOINT-COMMIT* LICENSE* README* \
  $PKG/usr/doc/$PKGNAM-$VERSION/libbpf-${LIBBPF_VERSION}

# 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