Automake and libltdl

[Thomas Degris]

Hello,

I am using Automake (and autoconf) and libltdl in my package. I would 
like to know what is the best way to add a --enable-debug option to my 
configure.ac file to compile my package and the libltdl library with 
-ggdb3 flag (and most important: remove this -O2 flag which I don't know 
where it comes from).

Thanks,

Thomas