#!/bin/bash

# Slackware build script for aflplusplus

# Written by B. Watson (urchlay@slackware.uk)

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

# 20251214 bkw: updated for v4.32c. This isn't the latest version, but
# it's the latest version that will build on 15.0 *with* afl-clang-lto
# support. >= 4.33c would need a newer clang. It wouldn't be utterly
# useless without afl-clang-lto, but it's upstream's recommended way
# to build fuzzable binaries, so I don't want to drop it.

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

PRGNAM=aflplusplus
SRCNAM=AFLplusplus
VERSION=${VERSION:-4.32c}
BUILD=${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}

# No SLKCFLAGS here, use upstream's flags (they know what they're doing).
LIBDIRSUFFIX=""
[ "$ARCH" = "x86_64" ] && LIBDIRSUFFIX="64"

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 . ! -type l    -a \
  \(     -perm /111 -a ! -perm 755 -a -exec chmod -f 755 {} + \) -o \
  \(   ! -perm /111 -a ! -perm 644 -a -exec chmod -f 644 {} + \)

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

# 20251214 bkw: someday we might need these:
    #REAL_CC=gcc \
    #REAL_CXX=g++ \
# ...but they don't help with 4.33c or 4.34c.

runmake() {
  make \
    DESTDIR=$PKG \
    PREFIX=/usr \
    HELPER_PATH=/usr/lib$LIBDIRSUFFIX/$PRGNAM \
    DOC_PATH=$DOCDIR \
    MAN_PATH=/usr/man/man8 \
    "$1"
}

# "make all" doesn't include qemu_mode (which gets built separately,
# below). The other modes aren't built because they're a lot of effort
# to build for not much gain:

# coresight_mode: ARM64-only. Beyond the scope of this SBo build.
# frida_mode: New and missing a lot of features. Also a PITA to build.
# nyx_mode: Written in Rust. Too fast-moving of a target for me, sorry.
# unicorn_mode: Looks interesting, but I don't need it, do you?

# Anyone who wants to is welcome to submit SlackBuilds for the other
# modes, though it'll take some care to keep them from conflicting
# with this one: your script will have to build the main aflplusplus
# stuff (make all), because the "modes" require it to be built first,
# but your package should only install the mode-specific stuff (so you
# can't just use "make install").

runmake all
runmake man

# 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"
  # Make it use the qemu source provided by us, instead of doing a git
  # clone (which didn't work properly anyway).
  patch -p1 < $CWD/build_qemu_support.diff
  WITHQEMU=WITH
  ( cd qemu_mode
    rm -rf qemuafl
    tar xvf "$QEMUSRC"
    NO_CHECKOUT=1 sh build_qemu_support.sh )
else
  echo "=== QEMU source NOT found, not building qemu_mode"
  WITHQEMU=WITHOUT
fi

runmake 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

# 20251214 bkw: for now, make this +x to shut sbopkglint up. The
# correct solution will be to modify sbopkglint.
chmod +x $PKG/usr/share/afl/testcases/others/elf/small_exec.elf

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

rm -f $PKGDOC/INSTALL*              # useless.
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