I compiled master (0.9.2-devel, a9012a7) as well as the 0.9.1 tag from Git on my Raspberry Pi (Raspbian Wheezy) with
./configure --prefix=/home/pi/apps/lirc-git-0_9_1 --with-driver=tira --without-x --enable-debug
lircd --debug=1 gives me additional debug output in the lircd.log, anything larger than 1 (e.g. 2) does not give any debug output at all, but only the normal logging output from LIRC.
Also see https://sourceforge.net/p/lirc/mailman/message/32491789/ (borked in the web view, Mail from June 22nd 2014).