gcj -fCLASSPATH=... home folder expansion

Mon May 5 16:27:00 GMT 2003

I've just had a minor issue/feature with the -fCLASSPATH option:
-fCLASSPATH=/home/erik/myjars/aparticularjar.jar
versus
-fCLASSPATH=~/myjars/aparticularjar.jar
Anywhere else (as far as I know), gcj will expand '~/' to '/home/erik'.
Is there a reason why -fCLASSPATH doesn't do that?
By the way, I'm writing up some kind of generator that creates (bash
script) building instructions. I really would like to avoid instructions
that contain '/home/erik'. I'd rather have more portable output that
says '~/'.