🚀 go-pugleaf

I'm trying to figure out how to best include RCS version identifier
strings into the various modules I'm compiling with gcc.  I've been
running into two problems.

1) With -Wall the compiler warns about the variable being unused
2) The compiler optimizes away the existence of the string

This is as far as I got:

#ifdef __GNUG__
        static char rcsid[] __attribute__ ((unused)) =
#else
        static char rcsid[] =
#endif
        "$Id: CParser.cc,v 1.3 1995/12/11 21:57:30 lbin Exp $";

However the ((unused)) attribute appears to be new in gcc 2.7.0.  Is
there some other way of doing this which is likely to work across
more versions of gcc and/or more compilers?

james