gdbus-codegen's generated code includes:

      case G_TYPE_DOUBLE:
        ret = (g_value_get_double (a) == g_value_get_double (b));
        break;

Under -Wfloat-equal, this causes a warning (and NetworkManager builds with both -Wfloat-equal and -Werror).


Possible fixes:

  1. Move _g_value_equal() into libgio or libgobject so it always gets
     compiled against glib's warning flags and we don't have to worry
     about it.


  2. gdouble da = g_value_get_double (a);
     gdouble db = g_value_get_double (b);

     ret = !memcmp (&da, &db, sizeof (gdouble));


  3. Copy code from G_GNUC_BEGIN_IGNORE_DEPRECATIONS:

     #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
     _Pragma ("GCC diagnostic push")
     _Pragma ("GCC diagnostic ignored \"-Wfloat-equal\"")
     #endif

     ret = (g_value_get_double (a) == g_value_get_double (b));

     #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
     _Pragma ("GCC diagnostic pop")
     #endif