compiler: load imports and enforce package exports

cmd/w6c/main.c

@@ -77,6 +77,7 @@ main(int argc, char **argv)
 
 	check_init(&c, a);
 	c.is_test = testmode;
+	c.sep_mode = sepmode;
 	check_file(&c, file);
 	if (c.errs) return 1;