General search for symbols...

[Hans-Peter Nilsson]

On 3 Apr 2003, Stephen Biggs wrote:

> On Wed, 2003-04-02 at 13:34, Hans-Peter Nilsson wrote:
> > On 2 Apr 2003, Stephen Biggs wrote:
> > > I am trying to port GCC to another machine.
> > >
> > > Given that I have a file <new gcc
> > > path>/gcc/config/<machine>/<machine>.c, how would I, within any of the
> > > functions in that file find out if a certain symbol has been defined by
> > > a "#define" statement in the C source that is being compiled?
> >
> > That's an odd need for a new port.  Care to elaborate; example?
> > (It might turn out to be a misunderstanding or a need covered
> > by an existing mechanism, that's mainly why I ask.)
>
> Thanks for the reply.
>
> E.g., I need to do something different in the assembly output based on
> whether varargs.h or stdarg.h was included in the C source file.

Maybe that need is covered by the macro current_function_stdarg.
See function.h.  That particular macro unfortunately seems not
documented.  See also other ports.  One or another has probably
solved the same problem your port has.

> I
> thought to check to see if either "_VARARGS_H" or "_STDARG_H" was
> defined.  I am also going to need this for other things.

I can't guess what you mean by "other things" so I can't help
you there.

brgds, H-P