Debugging line information missing ? (seperate build dir)

[Mike Mattie]

hello gcc mailing list,

GCC (3.3.6) fails  to generate debugging information when the object
file is compiled in a directory seperate from the source tree (using
autoconf/automake).
The C pre-processor is able to find all the source files, so why is
debug symbol generation crippled in this scenario ? If anyone could
shed light on what
is hanging up the compiler I would greatly appreciate it.