expression_with_stack_xtensa: protected switch stacks function to compile only on window ABI supported platform

components/esp_common/include/esp_expression_with_stack.h

@@ -1,3 +1,17 @@
+// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #ifndef __ESP_EXPRESSION_WITH_STACK_H
 #define __ESP_EXPRESSION_WITH_STACK_H