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=$http_proxy
opde feeds && opde config -a
make package/feeds/base/ustream-ssl/compile -j$(nproc) || make package/feeds/base/ustream-ssl/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
-- 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
-- Configuring done
-- Generating done
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_ASM_COMPILER
    CMAKE_ASM_COMPILER_LAUNCHER
    CMAKE_CXX_COMPILER
    CMAKE_CXX_FLAGS_RELEASE
    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
    DL_LIBRARY


-- Build files have been written to: /openwrt/build_dir/target-x86_64_musl/ustream-ssl-mbedtls/ustream-ssl-2020-12-10-68d09243
ninja: Entering directory `/openwrt/build_dir/target-x86_64_musl/ustream-ssl-mbedtls/ustream-ssl-2020-12-10-68d09243'
[1/7] Building C object CMakeFiles/ustream-example-client.dir/ustream-example-client.c.o
[2/7] Building C object CMakeFiles/ustream-example-server.dir/ustream-example-server.c.o
[3/7] Building C object CMakeFiles/ustream-ssl.dir/ustream-ssl.c.o
[4/7] Building C object CMakeFiles/ustream-ssl.dir/ustream-mbedtls.c.o
[5/7] Linking C shared library libustream-ssl.so
[6/7] Linking C executable ustream-example-client
FAILED: ustream-example-client 
: && /openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/bin/x86_64-openwrt-linux-musl-gcc -Os -pipe -fno-caller-saves -fno-plt -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -fmacro-prefix-map=/openwrt/build_dir/target-x86_64_musl/ustream-ssl-mbedtls/ustream-ssl-2020-12-10-68d09243=ustream-ssl-2020-12-10-68d09243 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -DNDEBUG -L/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/usr/lib -L/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib -znow -zrelro CMakeFiles/ustream-example-client.dir/ustream-example-client.c.o -o ustream-example-client  libustream-ssl.so  -lubox  -lmbedtls  -lmbedx509  -lmbedcrypto  -lm && :
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_init'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_conf_min_version'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_config_defaults'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_config_init'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_cache_get'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_free'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_config_free'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_setup'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_cache_set'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_cache_set_max_entries'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_cache_free'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_handshake'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_cache_set_timeout'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_get_ciphersuite_id'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_conf_authmode'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_set_bio'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_get_verify_result'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_read'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_conf_ciphersuites'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_conf_rng'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_conf_session_cache'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_cache_init'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_set_hostname'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_write'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_conf_own_cert'
/openwrt/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib/gcc/x86_64-openwrt-linux-musl/8.4.0/../../../../x86_64-openwrt-linux-musl/bin/ld: libustream-ssl.so: undefined reference to `mbedtls_ssl_conf_ca_chain'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
make[3]: *** [Makefile:73: /openwrt/build_dir/target-x86_64_musl/ustream-ssl-mbedtls/ustream-ssl-2020-12-10-68d09243/.built] Error 1