cpp problem in recent snapshots, alpha linux

[Robert Read]

One of the include files in XFree86 does something like this:

#define ProjName proj
#define Concat3(a,b,c) a##b##c
#define IncFile Concat3(<,ProjName,.h>)
#include IncFile

Notice the < and > in the macro.  Is there something wrong with this
code? It works fine on older gcc, but not with recent snapshots.
The error I'm getting is:

$ gcc -E t1.h
t1.h:4:16: macro `Concat3' used with just one arg
t1.h:4:16: ,ProjName,.h: No such file or directory

It looks like cpp is treating the bare < and > differently now.
Running on Alpha Linux, snapshot 20000228.


robert