{% if flag?(:win32) %}

    LIBRESSL_VERSION = "0.0.0"

      {% from_libressl = false %}

    OPENSSL_VERSION = {{ ssl_version }}

      {% ssl_version = nil %}

      {% for dir in Crystal::LIBRARY_PATH.split(';') %}

        {% unless ssl_version %}

          {% config_path = "#{dir.id}\\openssl_VERSION" %}

          {% if config_version = read_file?(config_path) %}

            {% ssl_version = config_version.chomp %}

          {% end %}

        {% end %}

      {% end %}

      {% ssl_version ||= "0.0.0" %}

    {% else %}

      {% from_libressl = (`hash pkg-config 2> /dev/null || printf %s false` != "false") &&

                         (`test -f $(pkg-config --silence-errors --variable=includedir libcrypto)/openssl/opensslv.h || printf %s false` != "false") &&

                         (`printf "#include <openssl/opensslv.h>\nLIBRESSL_VERSION_NUMBER" | ${CC:-cc} $(pkg-config --cflags --silence-errors libcrypto || true) -E -`.chomp.split('\n').last != "LIBRESSL_VERSION_NUMBER") %}

      {% ssl_version = `hash pkg-config 2> /dev/null && pkg-config --silence-errors --modversion libcrypto || printf %s 0.0.0`.split.last.gsub(/[^0-9.]/, "") %}

    {% end %}

    {% if from_libressl %}

      LIBRESSL_VERSION = {{ ssl_version }}

      OPENSSL_VERSION = "0.0.0"

    {% else %}

      LIBRESSL_VERSION = "0.0.0"

      OPENSSL_VERSION = {{ ssl_version }}

    {% end %}

  @[Link(ldflags: "`command -v pkg-config > /dev/null && pkg-config --libs --silence-errors libcrypto || printf %s '-lcrypto'`")]

  @[Link(ldflags: "-LCRYSTAL_SSL_LDFLAGS -lcrypto")]