🚀 go-pugleaf

I recently finished converting a SPARC application from Sun's K&R
'C' compiler ('cc') to Gnu C.  Everything works exactly as it did
before, with a single exception: selection_inquire().

I use this function in getting a copy of the text string that is
currently highlighted.  It is declared in the Xview include files as:

	EXTERN_FUNCTION (Seln_holder selection_inquire, (Xv_Server
			 server, Seln_rank which));

The type "Seln_holder" is a structure:

	typedef struct	{
	    Seln_rank           rank;	/* an "enum" */
	    Seln_state          state;	/* an "enum" */
	    Seln_access         access;	/* a "struct" */
	}	Seln_holder;


Under 'cc', the struct variable that receives the return value contains
appropriate values when the call returns.  Under 'gcc' the struct
variable is not changed at all; its uninitialized contents are
identical before and after the call.

I suspect the problem lies with the way in which the compilers handle
assignments to structures, and structures as return values.  Is it
possible that 'cc', a K&R compiler, assumes that returning a struct
really means returning a struct *pointer*, whereas 'gcc' expects the
actual struct to be returned (in other words, could this be an ANSI vs.
K&R conflict)?

In any case, I will have to continue compiling the one file containing
this one function with 'cc' instead of 'gcc', until I can figure this
out.  I have also contacted Sun on this problem, and they are
investigating it.  I would appreciate any help or suggestions you may
have to offer.  Thanks.
____________________________________________________________________________
Daniel A. Harling                        (harling@pictel.com)
PictureTel Corp.             Opinions expressed are not necessarily those of
Peabody, MA  01960                 PictureTel, but they ought to be!