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#!/bin/sh

# Slackware build script for qemu

# Copyright 2009, 2010  Andrew Brouwers <abrouwers@gmail.com>
# Copyright 2013, 2014  Edward Koenig, Vancouver, USA <kingbeowulf@gmail.com>
# 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.

# Changelog
# 1.0	27-FEB-2013	New SBo maintainer
# 1.0	07-MAR-2013	updated to 1.4, includes qemu-kvm; thanks to
#			rworkman and ponce for script ideas.
# 1.1	28-MAR-2013	fix missing docs per C. Willing and
#			add missing --libdir (patched in qemu-trivial upstream)
# 1.2   22-SEP-2013     updated to 1.6
# 1.3   03-NOV-2013     updated to 1.6.1
# 1.4   28-APR-2014     updated to 2.0.0 (thanks Callum Davies <calrogman@gmail.com>), added useful options,
#                       clean ups, libusb version check.
# 1.4a  04-MAY-2014     fixed typos thanks to sandb0y
# 1.5   10-AUG-2014		updated to new version, watch for legacy "gotchas"
# 1.6	18-NOV-2014		updated version, last of the 2.1 series, changed defaults per SBo list
# 1.6a	23-NOV-2014		added overlooked AUDIODRIVERS switch per SBo list
# 1.7	01-JAN-2015	    updated to 2.2.0 ; build and link static libusb option (rw, tm, SBo list)
# 1.8	27-APR-2015     updated to version 2.3.0
# 1.9   14-MAY-2015     patched for "Venom" CVE-2015-3456 http://git.qemu.org/?p=qemu.git;a=commitdiff;h=e907746266721f305d67bc0718795fedee2e824c
# 2.0   11-JUL-2015     patched for Heap-based buffer overflow in the PCNET controller CVE-2015-3209 http://git.qemu.org/?p=qemu.git;a=commitdiff;h=9f7c594c006289ad41169b854d70f5da6e400a2a

PRGNAM=qemu
VERSION=${VERSION:-2.3.0}
BUILD=${BUILD:-3}
TAG=${TAG:-_SBo}

KVMGROUP=${KVMGROUP:-users}
TARGETS=${TARGETS:-some}
VNC_ENABLE=${VNC_ENABLE:-yes}
AUDIODRIVERS=${AUDIODRIVERS:-alsa,oss,sdl,esd}
LIBUSB=${LIBUSB:-no}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i486 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
  KVMARCH="i386"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
  KVMARCH="i386"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
  KVMARCH="x86_64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

# Needed to build man pages if built after plain "su"
export PATH=$PATH:/usr/share/texmf/bin

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.bz2
cd $PRGNAM-$VERSION
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

# Remove double CFLAGS
sed -i "s|^\ \ CFLAGS=\"-O2\ |  CFLAGS=\"|" configure

# Enable only x86* and arm emulation for qemu: if you want to build
# all the targets available use TARGETS=all
if [ "$TARGETS" = "all" ]; then
  targets=""
else
  targets="--target-list=i386-softmmu,x86_64-softmmu,i386-linux-user,x86_64-linux-user,arm-softmmu,arm-linux-user,armeb-linux-user"
fi

# To omit VNC capability, use VNC_ENABLE=no
if [ "$VNC_ENABLE" = "yes" ]; then
  with_vnc="--enable-vnc --enable-vnc-tls --enable-vnc-jpeg"
else
  with_vnc="--disable-vnc"
fi

# Build libusb-1.0.19 statically so that usb passthrough will work;
# not needed if you upgrade the default libdir.
USBSTATIC=""
if [ "$LIBUSB" = "yes" ]; then
  tar xf $CWD/libusb-1.0.19.tar.xz
  cd libusb-1.0.19
  CFLAGS="$SLKCFLAGS" \
  ./configure \
    --prefix=$TMP/$PRGNAM-$VERSION/libusb-static \
    --build=$ARCH-slackware-linux \
    --disable-shared \
    --enable-static
  make install
  cd ..
  sed -i 's/--cflags libusb-1.0/\0 --static/' configure
  sed -i 's/--libs libusb-1.0/\0 --static/' configure
  USBSTATIC="$TMP/$PRGNAM-$VERSION/libusb-static/lib/pkgconfig"
fi

# patch Venom bug CVE-2015-3456
patch -p1 < $CWD/qemu_venom.patch

# patch PCNET controller bug CVE-2015-3209
patch -p1 < $CWD/qemu_pcnet.patch

PKG_CONFIG_PATH+="${USBSTATIC}" \
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --docdir=/usr/doc/$PRGNAM-$VERSION \
  --enable-gtk \
  --enable-system \
  --enable-kvm \
  --disable-debug-info \
  --enable-virtfs \
  --enable-sdl \
  --audio-drv-list=${AUDIODRIVERS} \
  $with_vnc \
  $targets

# Make these first; otherwise make won't run in parallel.
make config-all-devices.mak config-all-disas.mak

make V=1
make install DESTDIR=$PKG

# Remove empty /var
rm -rf $PKG/var/run

# install some udev rules for /dev/kvm
mkdir -p $PKG/lib/udev/rules.d/
sed "s/@GROUP@/$KVMGROUP/" $CWD/65-kvm.rules \
  > $PKG/lib/udev/rules.d/65-kvm.rules

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

# create a symlink for qemu-kvm to support aqemu and such frontends
# even though qemu now has a gtk gui.
[ ! -z $KVMARCH ] && ln -s qemu-system-$KVMARCH $PKG/usr/bin/qemu-kvm

# move any generated man pages to their proper location
if [ -d $PKG/usr/share/man ]; then
  mv $PKG/usr/share/man $PKG/usr
  gzip -9 $PKG/usr/man/man?/*.?
fi

# Add docs to the proper location
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a Changelog COPYING* CODING_STYLE HACKING LICENSE MAINTAINERS README qemu-*.html docs/* \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

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