1#================= 2# Install ccache 3 4# Install ccache from source since ccache 3.x packaged with most linux distributions 5# does not support Redis backend for caching. 6RUN unset CMAKE_TOOLCHAIN_FILE && unset AS AR CC CPP CXX LD STRIP OBJCOPY ${'\\'} 7 && curl -sSL -o ccache.tar.gz https://github.com/ccache/ccache/releases/download/v4.7.5/ccache-4.7.5.tar.gz ${'\\'} 8 && tar -zxf ccache.tar.gz ${'\\'} 9 && cd ccache-4.7.5 ${'\\'} 10 && mkdir build && cd build ${'\\'} 11 && cmake -DCMAKE_BUILD_TYPE=Release -DZSTD_FROM_INTERNET=ON -DHIREDIS_FROM_INTERNET=ON .. ${'\\'} 12 && make -j4 && make install ${'\\'} 13 && cd ../.. ${'\\'} 14 && rm -rf ccache-4.7.5 ccache.tar.gz 15