[plt-scheme] NetBSD build and wchar_t

Matthew Flatt <mflatt at cs.utah.edu> writes:

> I've added this support to xform, at least for what seems to be gcc's
> notation for source locations. It's enabled by `configure' when the
> compiler is "gcc".

    I tried SVN 12429, and that's a no go.

The source-location annotations that are emitted have lost the flag
information; for example

# 39 "/usr/include/stddef.h" 2 3 4

comes out as
# 39 "/usr/include/stddef.h"

The "3" flag is the critical one for a wchar_t typedef being ignored.