(C++) linkage patch

[Jason Merrill]

O, what a tangled web we weave...

1999-03-18  Jason Merrill  <jason@yorick.cygnus.com>

	* decl.c (start_function): Suppress normal linkage heuristics
	for #pragma interface under MULTIPLE_SYMBOL_SPACES.

Index: decl.c
===================================================================
RCS file: /egcs/carton/cvsfiles/egcs/gcc/cp/decl.c,v
retrieving revision 1.325
diff -c -p -r1.325 decl.c
*** decl.c	1999/03/17 00:28:27	1.325
--- decl.c	1999/03/19 09:19:22
*************** start_function (declspecs, declarator, a
*** 13133,13138 ****
--- 13133,13152 ----
        DECL_NOT_REALLY_EXTERN (decl1) = 0;
        DECL_INTERFACE_KNOWN (decl1) = 1;
      }
+   else if (interface_unknown && interface_only
+ 	   && (! DECL_TEMPLATE_INSTANTIATION (decl1)
+ 	       || flag_alt_external_templates))
+     {
+       /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
+ 	 interface, we will have interface_only set but not
+ 	 interface_known.  In that case, we don't want to use the normal
+ 	 heuristics because someone will supply a #pragma implementation
+ 	 elsewhere, and deducing it here would produce a conflict.  */
+       comdat_linkage (decl1);
+       DECL_EXTERNAL (decl1) = 0;
+       DECL_INTERFACE_KNOWN (decl1) = 1;
+       DECL_DEFER_OUTPUT (decl1) = 1;
+     }
    else
      {
        /* This is a definition, not a reference.