#!/bin/bash

# Slackware build script for aflplusplus

# Written by B. Watson (yalhcru@gmail.com)

# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

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

PRGNAM=aflplusplus
SRCNAM=AFLplusplus
VERSION=${VERSION:-3.14c}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $SRCNAM-$VERSION
tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
cd $SRCNAM-$VERSION
chown -R root:root .
find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+

DOCDIR=/usr/doc/$PRGNAM-$VERSION
PKGDOC=$PKG/$DOCDIR

# Make it use the qemu source provided by us, instead of doing a git
# clone (which didn't work properly anyway). Also this removes the
# hexagon arch in qemu, because its meson.build breaks the build (even
# though we're not even building hexagon support).
patch -p1 < $CWD/build_qemu_support.diff

# qemu mode is optional, only build if the source exists.
QEMUVER="$( cat qemu_mode/QEMUAFL_VERSION )"
QEMUSRC="$CWD/qemuafl-$QEMUVER.tar.xz"
if [ -e "$QEMUSRC" ]; then
  echo "=== QEMU source found, building qemu_mode"
  ( cd qemu_mode
    rm -rf qemuafl
    tar xvf "$QEMUSRC" )
    WITHQEMU=WITH
else
  echo "=== QEMU source NOT found, not building qemu_mode"
  sed -i \
    -e '/-cd qemu_mode/d' \
    GNUmakefile
    WITHQEMU=WITHOUT
fi

# Apply our flags, disable frida and unicorn modes because they
# don't build.
sed -i \
  -e "s/= *-O3 *-funroll-loops/= $SLKCFLAGS/" \
  -e '/MAKE.*-C *frida_mode *$/d' \
  -e '/-cd unicorn_mode/d' \
  GNUmakefile

make \
  DESTDIR=$PKG \
  PREFIX=/usr \
  HELPER_PATH=/usr/lib$LIBDIRSUFFIX/$PRGNAM \
  DOC_PATH=$DOCDIR \
  MAN_PATH=/usr/man/man8 \
  distrib \
  install

# 20211216 bkw: faster than the usual find|strip stuff. Maybe this
# should be the new template.
find $PKG/usr/bin $PKG/usr/lib* -type f -print0 | \
  xargs -0 file -m /etc/file/magic/elf | \
  grep -e "executable" -e "shared object" | \
  grep ELF | \
  cut -d: -f1 | \
  xargs strip --strip-unneeded 2> /dev/null || true

gzip $PKG/usr/man/man8/*.8

rm -f $PKGDOC/INSTALL*              # useless.
cat README.md > $PKGDOC/README.md   # upstream forgot this.
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild

mkdir -p $PKG/install
sed "s,@WITHQEMU@,$WITHQEMU," $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE