# Alternative Dockerfile using debootstrap approach
# This version uses a more modern base and cross-compiles for legacy compatibility

FROM debian:oldstable AS builder

# Install build dependencies
RUN apt-get update && apt-get install -y \
    wget \
    rpm2cpio \
    cpio \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Create workspace
WORKDIR /build

# Download and extract CentOS 3.9 libstdc++.5 and essential libraries
RUN mkdir -p rpms && cd rpms && \
    wget -q https://archive.kernel.org/centos-vault/3.9/os/i386/RedHat/RPMS/compat-libstdc++-7.3-2.96.122.i386.rpm && \
    wget -q https://archive.kernel.org/centos-vault/3.9/os/i386/RedHat/RPMS/libstdc++-3.2.3-47.3.i386.rpm

# Extract libraries
RUN cd rpms && \
    for rpm in *.rpm; do rpm2cpio "$rpm" | cpio -idmv; done

# Final stage - minimal runtime
FROM debian:oldstable-slim

# Install minimal GCC toolchain compatible with old C++ libraries
RUN apt-get update && apt-get install -y \
    gcc-10 \
    g++-10 \
    make \
    autoconf \
    automake \
    libtool \
    m4 \
    && update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 \
    && update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-10 100 \
    && rm -rf /var/lib/apt/lists/*

# Copy extracted libstdc++.5 from builder
COPY --from=builder /build/rpms/usr/lib/libstdc++.so.5* /usr/lib/i386-linux-gnu/

# Set up PFEXTLIB directory
WORKDIR /usr/local/PFEXTLIB-1.2
ENV PREFIX=/usr/local/PFEXTLIB-1.2
ENV LD_LIBRARY_PATH=/usr/lib/i386-linux-gnu:$LD_LIBRARY_PATH

CMD ["/bin/bash"]