wcc/cgen: #119 scalar &fn global DATA via the #117 reloc helper (both-stage)

cmd/w6c/cgen.c

@@ -15359,6 +15359,25 @@ emit_lets(Cg *c, FILE *out, Node *file)
 				Node *r = d->rhs;
 				while (r != NULL && r->kind == N_CAST) r = r->lhs;
 				if (r == NULL) continue;
+				/* #119: a scalar `&fn` global — 8B zero ptr
+				 * placeholder + the &fn->DATAR reloc (the #117
+				 * helper at its second consumer). Pre-#119 this
+				 * fell through fold_int_literal -> continue -> no
+				 * DATA -> undefined ref / garbage deref. */
+				{
+					const char *fsym = node_fnptr_sym(c, r);
+					if (fsym != NULL) {
+						const char *sym = mod_mangle_value(c,
+						    d->str, d->module);
+						fprintf(out, "DATAW %s(SB),\"", sym);
+						for (int i = 0; i < 8; i++)
+							emit_data_byte(out, 0);
+						fputs("\"\n", out);
+						fprintf(out, "DATAR %s+0(SB),%s(SB)\n",
+						    sym, fsym);
+						continue;
+					}
+				}
 				/* Same helper as emit_defs (#24): widens
 				 * the gate to cover N_UN(TK_MINUS/TILDE/PLUS,
 				 * leaf) so `let x: i8 = -1i8;` and friends