Error building Bro 1.2 on Debian Lenny.

I had the same issue when I upgraded from Etch to Lenny,the specific warnings I do not remember if were the same as you,
I am using a PowerPC computer.However,I used the same bro installation I had on Etch,on Lenny.The needed libraries
are fundamentally the same(the versions are not so different on Etch and Lenny),so I assumed that compatibility problems would not show.I was correct so far,bro-1.2.1 run smoothly on Lenny,however I only do bulk trace analysis of dump files,I do
not have a complete installation of bro.With the more recent bro1.4prerelease on LennyPPC the compilation was O.K.,so
probably you can achieve the same result.