rebuild.sh

#!/bin/sh
#
# Small script to rebuild the QEMU sources from scratch with the AOSP
# SDK toolchain.

# Sanitize environment
set -e
export LANG=C
export LC_ALL=C

panic () {
  echo "ERROR: $@" >&2
  exit 1
}

NUM_JOBS=$(grep -c -e "processor" /proc/cpuinfo)

if [ -z "$1" ]; then
    panic "Please specify the path to the QEMU source directory!"
fi

QEMU_SRC_DIR=$1
if [ ! -f $QEMU_SRC_DIR/include/qemu-common.h ]; then
    panic "Not a QEMU source directory: $QEMU_SRC_DIR"
fi
if [ ! -f $QEMU_SRC_DIR/configure ]; then
    # This happens is you mistakenly point to the Android emulator
    # source tree.
    panic "Missing configure script at: $QEMU_SRC_DIR"
fi

QEMU_SRC_DIR=$(cd "$QEMU_SRC_DIR" && pwd -P)
GIT_SHA1=$(cd $QEMU_SRC_DIR && git log --oneline --no-merges -n1)

echo "Cloning source directory to temporary workspace."
TMPDIR=/tmp/$USER-qemu-android-build-$$
mkdir $TMPDIR
(
    cd $TMPDIR
    git clone $QEMU_SRC_DIR qemu-android
    cd qemu-android
    git submodule update --init dtc
)

BUILD_DIR=$TMPDIR/build
(
    mkdir -p $BUILD_DIR
    cd $BUILD_DIR

    echo "Configuring QEMU build system."
    $TMPDIR/qemu-android/configure \
        --target-list=aarch64-softmmu \
        --disable-gtk \
        --enable-sdl \
        --disable-guest-agent \
        --disable-werror \

    echo "Building QEMU from sources."
    make -j$NUM_JOBS

    echo "Cleaning up."
    cd ..
)
cp $BUILD_DIR/aarch64-softmmu/qemu-system-aarch64 .
strip qemu-system-aarch64

rm -rf $TMPDIR

DATE=$(date +%Y-%m-%d)

cat > README <<EOF
This directory contains Linux binaries from the following sources:

  Git URL : https://qemu-android.googlesource.com/qemu-android
  Git SHA1: $GIT_SHA1
  Date    : $DATE
  Command : $(basename "$0") /path/to/qemu-android

EOF