#!/bin/bash

# Install QEMU from source for ARM emulation

# This downloads and builds QEMU instead of using apt

set -e

# Configuration

QEMU_VERSION="8.2.0"

QEMU_URL="https://download.qemu.org/qemu-${QEMU_VERSION}.tar.xz"

INSTALL_DIR="${HOME}/.local"

BUILD_DIR="${HOME}/.cache/qemu-build"

# Colors for output

RED='\033[0;31m'

GREEN='\033[0;32m'

YELLOW='\033[1;33m'

NC='\033[0m' # No Color

echo -e "${GREEN}==================================================${NC}"

echo -e "${GREEN} QEMU ${QEMU_VERSION} Installation Script${NC}"

echo -e "${GREEN}==================================================${NC}"

echo ""

# Check for required build dependencies

echo -e "${YELLOW}Checking build dependencies...${NC}"

MISSING_DEPS=()

check_command() {

if ! command -v $1 &> /dev/null; then

MISSING_DEPS+=($1)

fi

}

check_command make

check_command gcc

check_command g++

check_command python3

check_command meson

check_command ninja

check_command pkg-config

if [ ${#MISSING_DEPS[@]} -ne 0 ]; then

echo -e "${RED}Missing dependencies: ${MISSING_DEPS[@]}${NC}"

echo ""

echo "Please install them first:"

echo " sudo apt-get install build-essential python3-pip ninja-build pkg-config libglib2.0-dev libpixman-1-dev"

echo " pip3 install --user meson"

exit 1

fi

echo -e "${GREEN}All dependencies found!${NC}"

echo ""

# Create build directory

echo -e "${YELLOW}Creating build directory: ${BUILD_DIR}${NC}"

mkdir -p "${BUILD_DIR}"

cd "${BUILD_DIR}"

# Download QEMU if not already downloaded

if [ ! -f "qemu-${QEMU_VERSION}.tar.xz" ]; then

echo -e "${YELLOW}Downloading QEMU ${QEMU_VERSION}...${NC}"

wget "${QEMU_URL}" -O "qemu-${QEMU_VERSION}.tar.xz"

echo -e "${GREEN}Download complete!${NC}"

else

echo -e "${YELLOW}QEMU ${QEMU_VERSION} archive already exists, skipping download${NC}"

fi

# Extract

echo -e "${YELLOW}Extracting QEMU...${NC}"

tar -xf "qemu-${QEMU_VERSION}.tar.xz"

cd "qemu-${QEMU_VERSION}"

# Configure QEMU for ARM targets only

echo -e "${YELLOW}Configuring QEMU build...${NC}"

echo " Targets: arm-softmmu, arm-linux-user"

echo " Install prefix: ${INSTALL_DIR}"

echo ""

./configure \

--prefix="${INSTALL_DIR}" \

--target-list=arm-softmmu,arm-linux-user \

--enable-system \

--enable-linux-user \

--disable-docs \

--disable-gtk \

--disable-sdl \

--disable-vnc \

--enable-pie

# Build

echo ""

echo -e "${YELLOW}Building QEMU (this may take 10-20 minutes)...${NC}"

make -j$(nproc)

# Install

echo ""

echo -e "${YELLOW}Installing QEMU to ${INSTALL_DIR}...${NC}"

make install

# Verify installation

echo ""

echo -e "${GREEN}Verifying installation...${NC}"

"${INSTALL_DIR}/bin/qemu-system-arm" --version

echo ""

echo -e "${GREEN}==================================================${NC}"

echo -e "${GREEN} QEMU ${QEMU_VERSION} installed successfully!${NC}"

echo -e "${GREEN}==================================================${NC}"

echo ""

echo "QEMU binaries installed to: ${INSTALL_DIR}/bin/"

echo " - qemu-system-arm (for full system emulation)"

echo " - qemu-arm (for linux-user emulation)"

echo ""

echo "Add to your PATH:"

echo " export PATH=\"${INSTALL_DIR}/bin:\$PATH\""

echo ""

echo "Or add to ~/.bashrc:"

echo " echo 'export PATH=\"${INSTALL_DIR}/bin:\$PATH\"' >> ~/.bashrc"

echo " source ~/.bashrc"

echo ""

echo "Test QEMU:"

echo " qemu-system-arm -M help"

echo " qemu-system-arm -M netduino2 -nographic -kernel your-binary.elf"

echo ""