-D ?

Tue Apr 23 09:38:00 GMT 2002

What does the -D switch do ?
In the help it says "-D<macro> Define a <macro> with string '1' as its
value", which is what I need, but when using it, I get an error "can't
specify '-D' without '--main'.
I try to compile together java and c code by using JNI (which works just
fine in the version from 17/12/2001 - in 3.0.4 it seems to be broken).
So what does the -D switch do, and what should I use instead to define a
macro ?
BTW, any estimation on the release of 3.1 ?
A'kos