FROM opensuse/leap:15.6

# A version field to invalidate Cirrus's build cache when needed, as suggested in
# https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
ENV DOCKERFILE_VERSION=20240524

RUN zypper in -y \
    cmake \
    gcc12 \
    gcc12-c++ \
    git \
    libopenssl-devel \
    make \
    python312 \
    python312-devel \
  && rm -rf /var/cache/zypp

RUN update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.12 100
RUN update-alternatives --install /usr/bin/python3-config python3-config /usr/bin/python3.12-config 100

RUN update-alternatives --install /usr/bin/cc cc /usr/bin/gcc-12 100
RUN update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++-12 100