Dockerfile.64

FROM ubuntu:20.04

ENV DEBIAN_FRONTEND=noninteractive

# Ubuntu 20.04 (focal) provides glibc 2.31 — oldest among 64-bit SpruceOS devices
RUN dpkg --add-architecture arm64 && \
    sed -i 's/^deb http/deb [arch=amd64] http/g' /etc/apt/sources.list && \
    echo "deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports focal main restricted universe multiverse" >> /etc/apt/sources.list && \
    echo "deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports focal-updates main restricted universe multiverse" >> /etc/apt/sources.list && \
    apt-get update && \
    apt-get install -y --no-install-recommends \
    build-essential \
    gcc-aarch64-linux-gnu \
    g++-aarch64-linux-gnu \
    pkg-config \
    git \
    ca-certificates \
    python3 \
    wget \
    ccache \
    cmake \
    libsdl2-dev:arm64 \
    libasound2-dev:arm64 \
    libgles2-mesa-dev:arm64 \
    libegl1-mesa-dev:arm64 \
    libpng-dev:arm64 \
    zlib1g-dev:arm64 \
    libglew-dev:arm64 \
    libzip-dev:arm64 \
    && rm -rf /var/lib/apt/lists/*

# Create CMake toolchain file for aarch64 cross-compilation
RUN printf '\
set(CMAKE_SYSTEM_NAME Linux)\n\
set(CMAKE_SYSTEM_PROCESSOR aarch64)\n\
set(CMAKE_C_COMPILER aarch64-linux-gnu-gcc)\n\
set(CMAKE_CXX_COMPILER aarch64-linux-gnu-g++)\n\
set(CMAKE_FIND_ROOT_PATH /usr/aarch64-linux-gnu /usr/lib/aarch64-linux-gnu /usr)\n\
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)\n\
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY BOTH)\n\
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH)\n\
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE BOTH)\n\
set(PKG_CONFIG_EXECUTABLE /usr/bin/pkg-config)\n\
set(ENV{PKG_CONFIG_PATH} "/usr/lib/aarch64-linux-gnu/pkgconfig")\n\
set(ENV{PKG_CONFIG_LIBDIR} "/usr/lib/aarch64-linux-gnu/pkgconfig")\n\
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)\n\
' > /tmp/aarch64-toolchain.cmake

COPY build-64.sh /build-64.sh
RUN chmod +x /build-64.sh
COPY patches/ /patches/

WORKDIR /build
ENTRYPOINT ["/build-64.sh"]