https://bugs.winehq.org/show_bug.cgi?id=39165
--- Comment #6 from Dmitry Timoshkov dmitry@baikal.ru --- (In reply to Dmitry Timoshkov from comment #5)
$> grep -r AL_UNSIGNED_BYTE /usr/include/AL
should read as $> grep -r ALC_UNSIGNED_BYTE /usr/include/AL