Merge branch 'master' into ota_commands_in_flash

* master: (37 commits)
  BREAKING: Change return EEPROM.end() to bool (esp8266#7630)
  BREAKING: Change return type of channel() (esp8266#7656)
  BREAKING: Change return type of RSSI() (esp8266#7657)
  Add Copyright notice to Schedule.h (esp8266#7653)
  MDNS MultiInterface (esp8266#7636)
  BREAKING: Add Wrong Password wifi status case (esp8266#7652)
  New flash writing method with offset/memory/size alignment handling (esp8266#7514)
  Fix error when debug enabled but no port chosen (esp8266#7648)
  LEAmDNSv2: change a macro name to be independant from LEAmDNS1 (esp8266#7640)
  Allow test framework to use cores/esp8266/Arduino.h directly (esp8266#7377)
  Update OTA HTTP Server Header Information (esp8266#7633)
  Add missing sntp_init/sntp_stop (esp8266#7628)
  Use direct member initialization instead of ctr initialisation (esp8266#7558)
  Prevent rewriting Updater_Signing.h if content unchanged (esp8266#7627)
  Add WiFi Multi to readme.rst
  Remove stray axtls refs, deprecated compat funcs (esp8266#7626)
  Pull deprecated axtls link (esp8266#7624)
  Redesign ESP8266WiFiMulti.[cpp|h]
  Update README.md (esp8266#7623)
  Eliminate code duplication by template for printNumber(...)/printFloat(...).
  ...

.github/workflows/pull-request.yml

@@ -154,7 +154,8 @@ jobs:
         mod: 42 # Picked at random to give 4-5 builds and exit.
         rem: 13
       run: |
-        sudo apt-get install python3-pip python3-setuptools
+        sudo apt update
+        sudo apt install python3-pip python3-setuptools
         PATH=/home/runner/.local/bin:$PATH bash ./tests/platformio.sh
 
 
@@ -174,7 +175,8 @@ jobs:
         TRAVIS_BUILD_DIR: ${{ github.workspace }}
         TRAVIS_TAG: ${{ github.ref }}
       run: |
-        sudo apt-get install valgrind lcov
+        sudo apt update
+        sudo apt install valgrind lcov
         bash ./tests/ci/host_test.sh
 
 
@@ -194,7 +196,8 @@ jobs:
         TRAVIS_BUILD_DIR: ${{ github.workspace }}
         TRAVIS_TAG: ${{ github.ref }}
       run: |
-        sudo apt-get install python3-pip python3-setuptools
+        sudo apt update
+        sudo apt install python3-pip python3-setuptools
         # GitHub CI installs pip3 and setuptools outside the path.
         # Update the path to include them and run.
         PATH=/home/runner/.local/bin:$PATH pip3 install --user -r doc/requirements.txt
@@ -217,7 +220,8 @@ jobs:
         TRAVIS_BUILD_DIR: ${{ github.workspace }}
         TRAVIS_TAG: ${{ github.ref }}
       run: |
-          sudo apt-get install astyle
+          sudo apt update
+          sudo apt install astyle
           bash ./tests/ci/style_check.sh
 
 

README.md

@@ -3,7 +3,7 @@ Arduino core for ESP8266 WiFi chip
 
 # Quick links
 
-- [Latest release documentation](https://arduino-esp8266.readthedocs.io/en/2.7.2/)
+- [Latest release documentation](https://arduino-esp8266.readthedocs.io/en/2.7.4_a/)
 - [Current "git version" documentation](https://arduino-esp8266.readthedocs.io/en/latest/)
 - [Install git version](https://arduino-esp8266.readthedocs.io/en/latest/installing.html#using-git-version) ([sources](doc/installing.rst#using-git-version))
 
@@ -36,7 +36,7 @@ Starting with 1.6.4, Arduino allows installation of third-party platform package
 #### Latest release [![Latest release](https://img.shields.io/github/release/esp8266/Arduino.svg)](https://github.com/esp8266/Arduino/releases/latest/)
 Boards manager link: `https://arduino.esp8266.com/stable/package_esp8266com_index.json`
 
-Documentation: [https://arduino-esp8266.readthedocs.io/en/2.7.2/](https://arduino-esp8266.readthedocs.io/en/2.7.2/)
+Documentation: [https://arduino-esp8266.readthedocs.io/en/2.7.4_a/](https://arduino-esp8266.readthedocs.io/en/2.7.4_a/)
 
 ### Using git version
 [![Linux build status](https://travis-ci.org/esp8266/Arduino.svg)](https://travis-ci.org/esp8266/Arduino)
@@ -108,7 +108,7 @@ ESP8266 core includes an xtensa gcc toolchain, which is also under GPL.
 
 Esptool.py was initially created by Fredrik Ahlberg (@themadinventor, @kongo), and is currently maintained by Angus Gratton (@projectgus) under GPL 2.0 license.
 
-Espressif SDK included in this build is under Espressif MIT License.
+[Espressif's NONOS SDK](https://github.com/espressif/ESP8266_NONOS_SDK) included in this build is under Espressif MIT License.
 
 ESP8266 core files are licensed under LGPL.
 
@@ -118,8 +118,6 @@ ESP8266 core files are licensed under LGPL.
 
 [SoftwareSerial](https://github.com/plerup/espsoftwareserial) library and examples written by Peter Lerup. Distributed under LGPL 2.1.
 
-[axTLS](http://axtls.sourceforge.net/) library written by Cameron Rich, built from https://github.com/igrr/axtls-8266, is used in this project. It is distributed under [BSD license](https://github.com/igrr/axtls-8266/blob/master/LICENSE).
-
 [BearSSL](https://bearssl.org) library written by Thomas Pornin, built from https://github.com/earlephilhower/bearssl-esp8266, is used in this project.  It is distributed under the [MIT License](https://bearssl.org/#legal-details).
 
 [LittleFS](https://github.com/ARMmbed/littlefs) library written by ARM Limited and released under the [BSD 3-clause license](https://github.com/ARMmbed/littlefs/blob/master/LICENSE.md).

cores/esp8266/Arduino.h

@@ -37,6 +37,7 @@ extern "C" {
 #include "binary.h"
 #include "esp8266_peri.h"
 #include "twi.h"
+
 #include "core_esp8266_features.h"
 #include "core_esp8266_version.h"
 
@@ -125,15 +126,11 @@ void timer0_isr_init(void);
 void timer0_attachInterrupt(timercallback userFunc);
 void timer0_detachInterrupt(void);
 
-// Use stdlib abs() and round() to avoid issues with the C++ libraries
 #define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
 #define radians(deg) ((deg)*DEG_TO_RAD)
 #define degrees(rad) ((rad)*RAD_TO_DEG)
 #define sq(x) ((x)*(x))
 
-void ets_intr_lock();
-void ets_intr_unlock();
-
 #define interrupts() xt_rsil(0)
 #define noInterrupts() xt_rsil(15)
 
@@ -162,11 +159,12 @@ typedef uint16_t word;
 typedef bool boolean;
 typedef uint8_t byte;
 
+void ets_intr_lock();
+void ets_intr_unlock();
+
 void init(void);
 void initVariant(void);
 
-int atexit(void (*func)()) __attribute__((weak));
-
 void pinMode(uint8_t pin, uint8_t mode);
 void digitalWrite(uint8_t pin, uint8_t val);
 int digitalRead(uint8_t pin);
@@ -212,28 +210,31 @@ void optimistic_yield(uint32_t interval_us);
 } // extern "C"
 #endif
 
+// undefine stdlib's definitions when encountered, provide abs that supports floating point for C code
+#ifndef __cplusplus
+#undef abs
+#define abs(x) ({ __typeof__(x) _x = (x); _x > 0 ? _x : -_x; })
+#undef round
+#define round(x) ({ __typeof__(x) _x = (x); _x >= 0 ? (long)(_x + 0.5) : (long)(_x - 0.5); })
+#endif // ifndef __cplusplus
 
-
+// from this point onward, we need to configure the c++ environment
 #ifdef __cplusplus
 
 #include <algorithm>
+#include <cstdlib>
 #include <cmath>
-#include <pgmspace.h>
-
-#include "WCharacter.h"
-#include "WString.h"
-
-#include "HardwareSerial.h"
-#include "Esp.h"
-#include "Updater.h"
-#include "debug.h"
 
 using std::min;
 using std::max;
 using std::round;
 using std::isinf;
 using std::isnan;
 
+// Use float-compatible stl abs() and round(), we don't use Arduino macros to avoid issues with the C++ libraries
+using std::abs;
+using std::round;
+
 #define _min(a,b) ({ decltype(a) _a = (a); decltype(b) _b = (b); _a < _b? _a : _b; })
 #define _max(a,b) ({ decltype(a) _a = (a); decltype(b) _b = (b); _a > _b? _a : _b; })
 
@@ -273,8 +274,19 @@ inline void configTzTime(const char* tz, const char* server1,
     configTime(tz, server1, server2, server3);
 }
 
+// Everything we expect to be implicitly loaded for the sketch
+#include <pgmspace.h>
+
+#include "WCharacter.h"
+#include "WString.h"
+
+#include "HardwareSerial.h"
+#include "Esp.h"
+#include "Updater.h"
+
 #endif // __cplusplus
 
+#include "debug.h"
 #include "pins_arduino.h"
 
 #endif