#!/bin/sh

# Copyright 2014, 2018  Eric Hameleers, Eindhoven, NL
# Copyright 2018  Patrick J. Volkerding, Sebeka, MN, USA
# All rights reserved.
#
#   Permission to use, copy, modify, and distribute this software for
#   any purpose with or without fee is hereby granted, provided that
#   the above copyright notice and this permission notice appear in all
#   copies.
#
#   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
#   CONTRIBUTORS 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.
# -----------------------------------------------------------------------------


cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=cryptopp
VERSION=${VERSION:-6.1.0}
SRCVER=$(echo $VERSION | tr -d '.')
BUILD=${BUILD:-1}
NUMJOBS=${NUMJOBS:--j7}

TMP=${TMP:-/tmp}
PKG=$TMP/package-$PKGNAM

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$(uname -m)" in
    i?86) ARCH=i586 ;;
    arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
    *) ARCH=$(uname -m) ;;
  esac
  export ARCH
fi

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  SLKLDFLAGS=""
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  SLKLDFLAGS="-L/usr/lib64"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "armv7hl" ]; then
  SLKCFLAGS="-O3 -march=armv7-a -mfpu=vfpv3-d16"
  SLKLDFLAGS=""
  LIBDIRSUFFIX=""
else
  SLKCFLAGS="-O2"
  SLKLDFLAGS=""
  LIBDIRSUFFIX=""
fi

case "$ARCH" in
    arm*) TARGET=$ARCH-slackware-linux-gnueabi ;;
    *)    TARGET=$ARCH-slackware-linux ;;
esac

# Extract the sources:
rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf ${PKGNAM}-${VERSION}
mkdir -p ${PKGNAM}-${VERSION}
unzip -a ${CWD}/${PKGNAM}${SRCVER}.zip -d ${PKGNAM}-${VERSION} || exit 1
cd ${PKGNAM}-${VERSION} || exit 1

## Do not mess up the CXXFLAGS:
#cat $CWD/patches/cryptopp_slkcflags.patch | patch -p1 --verbose || exit 1

# Fix bogus permissions:
chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \; -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;

# Cater to 64-bit Slackware:
sed -i -e "s,(PREFIX)/lib,(PREFIX)/lib${LIBDIRSUFFIX},g" GNUmakefile

# Compile and install:
make dynamic $NUMJOBS \
  CXXFLAGS="${SLKCFLAGS} -DNDEBUG" LDFLAGS="${LDFLAGS}"
make install PREFIX=$PKG/usr

# Install a pkg-config file:
mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig
cat $CWD/${PKGNAM}.pc | sed \
  -e "s,@LIBDIRSUFFIX@,${LIBDIRSUFFIX},g" \
  -e "s,@VERSION@,${VERSION},g" \
  >  $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/cryptopp.pc

# Add documentation:
mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -a *.txt $PKG/usr/doc/$PKGNAM-$VERSION

# Strip binaries (if any):
find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

# Add a package description:
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

# Build the package:
cd $PKG
/sbin/makepkg -l y -c n $TMP/${PKGNAM}-${VERSION}-${ARCH}-${BUILD}.txz