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

Applying ./patches/101-do-not-use-gold.patch using plaintext: 
patching file CMakeLists.txt

Applying ./patches/102-gcc9.patch using plaintext: 
patching file yarpl/Refcounted.h

Applying ./patches/103-no-boost-thread.patch using plaintext: 
patching file CMakeLists.txt
-- 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-x86_64_gcc-8.4.0_musl/bin/x86_64-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-x86_64_gcc-8.4.0_musl/bin/x86_64-openwrt-linux-musl-g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE  
CMake Error at cmake/InstallFolly.cmake:22 (find_package):
  Could not find a package configuration file provided by "folly" with any of
  the following names:

    follyConfig.cmake
    folly-config.cmake

  Add the installation prefix of "folly" to CMAKE_PREFIX_PATH or set
  "folly_DIR" to a directory containing one of the above files.  If "folly"
  provides a separate development package or SDK, be sure it has been
  installed.
Call Stack (most recent call first):
  CMakeLists.txt:131 (include)


-- Configuring incomplete, errors occurred!
See also "/openwrt/build_dir/target-x86_64_musl/rsocket-cpp-0a469f7a84d9e3c3ddcb6931df701a5dae536589/builddir/CMakeFiles/CMakeOutput.log".
make[3]: *** [Makefile:73: /openwrt/build_dir/target-x86_64_musl/rsocket-cpp-0a469f7a84d9e3c3ddcb6931df701a5dae536589/.configured_68b329da9893e34099c7d8ad5cb9c940] Error 1