if (MINGW)
  set($ENV:{OPENSSL_ROOT_DIR} /mingw64)
  find_package(OpenSSL REQUIRED)
  if (CMAKE_HOST_WIN32)
    set(OPENSSL_LIBRARIES
      libssl.a 
      libcrypto.a 
    )
  else()
    set(OPENSSL_LIBRARIES
      /mingw64/lib64/libssl.a 
      /mingw64/lib64/libcrypto.a 
    )
  endif()
else()
  if (IS_CLANG_COMPILER)
    set(OPENSSL_COMPILE_TYPE_EXTRA -clang)
  endif()

  if (MACOS)
    set(OPENSSL_COMPILE_TYPE darwin64-x86_64-cc)
  elseif(IS_ARM64)
    set(OPENSSL_COMPILE_TYPE linux-aarch64${OPENSSL_COMPILE_TYPE_EXTRA})
  else()
    set(OPENSSL_COMPILE_TYPE linux-x86_64${OPENSSL_COMPILE_TYPE_EXTRA})
  endif()

  set(OPENSSL_PROJECT_NAME openssl_${OPENSSL_VERSION})
  set(OPENSSL_BUILD_ROOT ${EXTERNAL_BUILD_ROOT}/builds/${OPENSSL_PROJECT_NAME})
  ExternalProject_Add(openssl_project
    DOWNLOAD_NO_PROGRESS 1
    URL https://github.com/openssl/openssl/releases/download/openssl-${OPENSSL_VERSION}/openssl-${OPENSSL_VERSION}.tar.gz 
    PREFIX ${OPENSSL_BUILD_ROOT}
    BUILD_IN_SOURCE 1
    CONFIGURE_COMMAND ./Configure 
      ${OPENSSL_COMPILE_TYPE} 
      --prefix=${EXTERNAL_BUILD_ROOT}
      no-apps
      no-docs
      no-shared 
    BUILD_COMMAND make
    INSTALL_COMMAND make install
  )

  set(OPENSSL_LIBRARIES
    ${EXTERNAL_BUILD_ROOT}/lib/libssl.a
    ${EXTERNAL_BUILD_ROOT}/lib/libcrypto.a
  )

  add_dependencies(openssl_project zlib_project)
endif()