compiler: separate package exports from entry roots

cmd/w6c/cgen.c

@@ -1519,8 +1519,8 @@ mod_collect(Cg *c, Node *file)
 		 * #99: under sep a dep unit's main is imported==0 too (its body
 		 * is composed with a path-carrying `//ww:module-reset`, #57), so
 		 * imported==0 no longer means "root unit" per-unit. Gate on
-		 * !sep_isdep (wwiout==NULL <=> root/link-entry unit, #69) so only
-		 * the root's main stays bare; a dep's main mangles on its path. */
+		 * !sep_isdep, which the explicit --entry mode controls independently
+		 * of export output, so only the root's main stays bare. */
 		if (d->str && strcmp(d->str, "main") == 0 && !d->imported
 		    && !c->sep_isdep)
 			continue;