if(PROJECT_ENABLE_CPP_HTTPLIB)
  if(PROJECT_BUILD)
    add_definitions(
      -DCPPHTTPLIB_OPENSSL_SUPPORT
      -DCPPHTTPLIB_TCP_NODELAY=true
      -DCPPHTTPLIB_ZLIB_SUPPORT
      -DPROJECT_ENABLE_CPP_HTTPLIB
    )
  elseif(NOT PROJECT_IS_MINGW OR CMAKE_HOST_WIN32)
    ExternalProject_Add(cpphttplib_project
      PREFIX external
      URL ${PROJECT_3RD_PARTY_DIR}/cpp-httplib-${CPP_HTTPLIB_VERSION}.tar.gz
      URL_HASH SHA256=${CPP_HTTPLIB_HASH}
      LIST_SEPARATOR |
      CMAKE_ARGS ${PROJECT_EXTERNAL_CMAKE_FLAGS}
        -DBUILD_SHARED_LIBS=${PROJECT_BUILD_SHARED_LIBS}
        -DBUILD_STATIC_LIBS=ON
        -DHTTPLIB_REQUIRE_OPENSSL=${PROJECT_ENABLE_OPENSSL}
        -DHTTPLIB_REQUIRE_ZLIB=ON
        -DHTTPLIB_REQUIRE_BROTLI=OFF
        -DHTTPLIB_TEST=OFF
        -DOPENSSL_USE_STATIC_LIBS=${OPENSSL_USE_STATIC_LIBS}
    )

    list(APPEND PROJECT_DEPENDENCIES cpphttplib_project)

    add_dependencies(cpphttplib_project curl_project)
    if (NOT CMAKE_HOST_WIN32)
      add_dependencies(cpphttplib_project openssl_project)
    endif()
  endif()
endif()