docker pull elonh/opde:sdk
docker run -it --rm elonh/opde:sdk zsh # or bash
export http_proxy= # [your proxy], do not use localhost or 127.0.0.1
export https_proxy=$http_proxy
opde feeds && opde config -a
make package/feeds/packages/ratechecker/compile -j$(nproc) || make package/feeds/packages/ratechecker/compile V=s

CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- The C compiler identification is GNU 8.4.0
-- The CXX compiler identification is GNU 8.4.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/bin/mips-openwrt-linux-musl-gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/bin/mips-openwrt-linux-musl-g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
EVENT
    linked by target "ratechecker" in directory /openwrt/build_dir/target-mips_24kc_musl/ratechecker-2020-01-30-a2b8b958

-- Generating done
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_ASM_COMPILER
    CMAKE_ASM_COMPILER_LAUNCHER
    CMAKE_EXPORT_NO_PACKAGE_REGISTRY
    CMAKE_EXPORT_PACKAGE_REGISTRY
    CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY
    CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY
    CMAKE_FIND_USE_PACKAGE_REGISTRY
    CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY
    CMAKE_MODULE_LINKER_FLAGS
    CMAKE_SHARED_LINKER_FLAGS
    DL_LIBRARY


CMake Generate step failed.  Build files cannot be regenerated correctly.
make[3]: *** [Makefile:44: /openwrt/build_dir/target-mips_24kc_musl/ratechecker-2020-01-30-a2b8b958/.configured_68b329da9893e34099c7d8ad5cb9c940] Error 1