fix(linux): fix build errors and warnings, remove ignore file

examples/cxx/experimental/experimental_cpp_component/host_test/gpio/main/gpio_cxx_test.cpp

@@ -1,16 +1,22 @@
-/* GPIO C++ unit tests
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
+/*
+ * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0-1.0
+ *
+ * GPIO C++ unit tests
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
 */
 #define CATCH_CONFIG_MAIN
 
 #include <stdio.h>
 #include "esp_err.h"
 #include "unity.h"
+#include "freertos/FreeRTOS.h"
 #include "freertos/portmacro.h"
 #include "gpio_cxx.hpp"
 #include "test_fixtures.hpp"

examples/cxx/experimental/experimental_cpp_component/host_test/i2c/main/i2c_cxx_test.cpp

@@ -14,6 +14,7 @@
 #define CATCH_CONFIG_MAIN
 #include <stdio.h>
 #include "unity.h"
+#include "freertos/FreeRTOS.h"
 #include "freertos/portmacro.h"
 #include "driver/i2c.h"
 #include "i2c_cxx.hpp"

examples/cxx/experimental/experimental_cpp_component/host_test/spi/main/spi_cxx_test.cpp

@@ -1,7 +1,7 @@
 /*
- * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
  *
- * SPDX-License-Identifier: CC0
+ * SPDX-License-Identifier: CC0-1.0
  *
  * This test code is in the Public Domain (or CC0 licensed, at your option.)
  *
@@ -13,6 +13,7 @@
 #define CATCH_CONFIG_MAIN
 #include <stdio.h>
 #include "unity.h"
+#include "freertos/FreeRTOS.h"
 #include "freertos/portmacro.h"
 #include "spi_host_cxx.hpp"
 #include "spi_host_private_cxx.hpp"