symlinked directory in project

[Leo Liu]

1. cd /tmp

2. create A/a.c with contents

void aa() {
    bb();
}

3. create B/b.c with contents:

void bb() {
    aa();
}

4. cd A 

5. ln -s /tmp/B .

6. gtags

7. global -v --result=grep --path-style=shorter --from-here=2:B/b.c aa

global: '/private/tmp/B/b.c' is out of the source project.

can this be made to work since symlinking other projects are common?
Thanks.

Leo