Check in Arduino API directory to avoid symlink (#176)

Fixes #171

Under Windows, it is very hard to make a symlink and by default git won't
make one to the Arduino API directory, causing annoying build errors.

Avoid the issue by duplicating the ArduinoAPI directory explicitly and using
CI to verify that there are no differences between the two.

Author: earlephilhower

.github/workflows/pull-request.yml

@@ -20,7 +20,7 @@ jobs:
     - name: Run codespell
       uses: codespell-project/actions-codespell@master
       with:
-        skip: ./pico-extras,./ArduinoCore-API,./libraries/SdFat,./libraries/Adafruit_TinyUSB_Arduino,./libraries/LittleFS/lib,./tools/pyserial,./pico-sdk,./.github,./docs/i2s.rst
+        skip: ./pico-extras,./ArduinoCore-API,./libraries/SdFat,./libraries/Adafruit_TinyUSB_Arduino,./libraries/LittleFS/lib,./tools/pyserial,./pico-sdk,./.github,./docs/i2s.rst,./cores/rp2040/api
         ignore_words_list: ser,DOUT
 
 # Consistent style
@@ -44,6 +44,10 @@ jobs:
         ./tests/restyle.sh
         # If anything changed, GIT should return an error and fail the test
         git diff --exit-code
+    - name: Check Arduino API copy is clean
+      run: |
+        git submodule update --init ./ArduinoCore-API
+        diff -r ./cores/rp2040/api ./ArduinoCore-API/api
 
 # Build all examples on linux (core and Arduino IDE)
   build-linux:

.gitignore

@@ -1,5 +1,3 @@
-
 .DS_Store
 system
 tools/dist
-cores/rp2040/api

cores/rp2040/api

@@ -0,0 +1,57 @@
+/*
+  Arduino API main include
+  Copyright (c) 2016 Arduino LLC. All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#ifndef ARDUINO_API_H
+#define ARDUINO_API_H
+
+// version 1.2.0
+#define ARDUINO_API_VERSION 10200
+
+#include "Binary.h"
+
+#ifdef __cplusplus
+#include "Interrupts.h"
+#include "IPAddress.h"
+#include "Print.h"
+#include "Printable.h"
+#include "PluggableUSB.h"
+#include "Server.h"
+#include "String.h"
+#include "Stream.h"
+#include "Udp.h"
+#include "USBAPI.h"
+#include "WCharacter.h"
+#endif
+
+/* Standard C library includes */
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <math.h>
+
+// Misc Arduino core functions
+#include "Common.h"
+
+#ifdef __cplusplus
+// Compatibility layer for older code
+#include "Compat.h"
+#endif
+
+#endif