C++ Function list does not show function if has double parenthesis

[mx4evaNZ]

As the heading says, this will not show in the function list:

void Task2_AnalogRead( void *pvParameters attribute((unused)) )
{
}

However if I remove the double parenthesis around “unused” it show okay:

void Task2_AnalogRead( void *pvParameters attribute(unused) )
{
}

[mx4evaNZ]

was too quick to press submit
Is the a way to fix this

Thanks