[antlr-interest] Problem with relative paths on Windows

[Braden McDaniel]

I'm observing an apparent problem with relative paths on Windows when 
attempting to generate code from a grammar that inherits another one. 
When issuing this command:

java -cp c:/data1/bmcdaniel/antlr/275/lib/antlr.jar antlr.Tool -o 
../../../src/libopenvrml/openvrml -glib 
../../../src/libopenvrml/openvrml/Vrml97Parser.g 
../../../src/libopenvrml/openvrml/X3DVrmlParser.g

I get this error:

ANTLR Parser Generator   Version 2.7.5 (20050128)   1989-2005 jGuru.com
error: cannot write expanded grammar file 
expanded../../../src/libopenvrml/openvrml/X3DVrmlParser.g

It looks like the name/path of the intermediate grammar file isn't being 
constructed correctly. This works just fine on Linux, though.

Braden