bug#79049: ChangeLog is added to distribution even when inside a false conditional

    if DISTRIBUTE_CHANGELOG
    ChangeLog:
            echo nop
    endif

I haven't had a chance to test this, but how about making the conditional
merely define a variable, and a fallback ChangeLog rule, as in:

if DISTRIBUTE_CHANGELOG
ChangeLog_target = ChangeLog
else
ChangeLog_target = no_ChangeLog
ChangeLog:
endif
$(ChangeLog_target):
	make changelog

I admit I still haven't got my mind wrapped very firmly around this
scenario :), so I might be way off. Just a thought. --best, karl.