Undefined symbols for architecture x86_64:
  "_rb_funcallv", referenced from:
      _protect_funcall0 in weechat-ruby.o
  "_rb_gc_writebarrier_unprotect", referenced from:
      _weechat_ruby_print_exception in weechat-ruby.o
  "_rb_str_new_static", referenced from:
      _weechat_ruby_api_init in weechat-ruby-api.o
      _weechat_ruby_api_plugin_get_name in weechat-ruby-api.o
      _weechat_ruby_api_iconv_to_internal in weechat-ruby-api.o
      _weechat_ruby_api_iconv_from_internal in weechat-ruby-api.o
      _weechat_ruby_api_gettext in weechat-ruby-api.o
      _weechat_ruby_api_ngettext in weechat-ruby-api.o
      _weechat_ruby_api_string_mask_to_regex in weechat-ruby-api.o
      ...