"C:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\tools\\xtensa-lx106-elf-gcc\\3.0.4-gcc10.3-1757bed/bin/xtensa-lx106-elf-g++" -D__ets__ -DICACHE_FLASH -U__STRICT_ANSI__ -D_GNU_SOURCE "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/include" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/lwip2/include" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/libc/xtensa-lx106-elf/include" "-ID:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin/core" -c -w -Werror=return-type -Os -g -free -fipa-pta -mlongcalls -mtext-section-literals -fno-rtti -falign-functions=4 -std=gnu++17 -MMD -ffunction-sections -fdata-sections -fno-exceptions -DMMU_IRAM_SIZE=0x8000 -DMMU_ICACHE_SIZE=0x8000 -DNONOSDK22x_190703=1 -DF_CPU=80000000L -DLWIP_OPEN_SRC -DTCP_MSS=536 -DLWIP_FEATURES=1 -DLWIP_IPV6=0 -DARDUINO=10819 -DARDUINO_ESP8266_ADAFRUIT_HUZZAH -DARDUINO_ARCH_ESP8266 "-DARDUINO_BOARD=\"ESP8266_ADAFRUIT_HUZZAH\"" -DFLASHMODE_QIO -DESP8266 "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\cores\\esp8266" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\variants\\adafruit" "-IC:\\Users\\akehj\\OneDrive\\Dokument\\Arduino\\libraries\\ESP8266WiFi\\src" "D:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin\\sketch\\Scheduler.cpp" -o "D:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin\\sketch\\Scheduler.cpp.o"
"C:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\tools\\xtensa-lx106-elf-gcc\\3.0.4-gcc10.3-1757bed/bin/xtensa-lx106-elf-g++" -D__ets__ -DICACHE_FLASH -U__STRICT_ANSI__ -D_GNU_SOURCE "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/include" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/lwip2/include" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/libc/xtensa-lx106-elf/include" "-ID:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin/core" -c -w -Werror=return-type -Os -g -free -fipa-pta -mlongcalls -mtext-section-literals -fno-rtti -falign-functions=4 -std=gnu++17 -MMD -ffunction-sections -fdata-sections -fno-exceptions -DMMU_IRAM_SIZE=0x8000 -DMMU_ICACHE_SIZE=0x8000 -DNONOSDK22x_190703=1 -DF_CPU=80000000L -DLWIP_OPEN_SRC -DTCP_MSS=536 -DLWIP_FEATURES=1 -DLWIP_IPV6=0 -DARDUINO=10819 -DARDUINO_ESP8266_ADAFRUIT_HUZZAH -DARDUINO_ARCH_ESP8266 "-DARDUINO_BOARD=\"ESP8266_ADAFRUIT_HUZZAH\"" -DFLASHMODE_QIO -DESP8266 "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\cores\\esp8266" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\variants\\adafruit" "-IC:\\Users\\akehj\\OneDrive\\Dokument\\Arduino\\libraries\\ESP8266WiFi\\src" "D:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin\\sketch\\b4r_main.cpp" -o "D:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin\\sketch\\b4r_main.cpp.o"
"C:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\tools\\xtensa-lx106-elf-gcc\\3.0.4-gcc10.3-1757bed/bin/xtensa-lx106-elf-g++" -D__ets__ -DICACHE_FLASH -U__STRICT_ANSI__ -D_GNU_SOURCE "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/include" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/lwip2/include" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/libc/xtensa-lx106-elf/include" "-ID:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin/core" -c -w -Werror=return-type -Os -g -free -fipa-pta -mlongcalls -mtext-section-literals -fno-rtti -falign-functions=4 -std=gnu++17 -MMD -ffunction-sections -fdata-sections -fno-exceptions -DMMU_IRAM_SIZE=0x8000 -DMMU_ICACHE_SIZE=0x8000 -DNONOSDK22x_190703=1 -DF_CPU=80000000L -DLWIP_OPEN_SRC -DTCP_MSS=536 -DLWIP_FEATURES=1 -DLWIP_IPV6=0 -DARDUINO=10819 -DARDUINO_ESP8266_ADAFRUIT_HUZZAH -DARDUINO_ARCH_ESP8266 "-DARDUINO_BOARD=\"ESP8266_ADAFRUIT_HUZZAH\"" -DFLASHMODE_QIO -DESP8266 "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\cores\\esp8266" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\variants\\adafruit" "-IC:\\Users\\akehj\\OneDrive\\Dokument\\Arduino\\libraries\\ESP8266WiFi\\src" "D:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin\\sketch\\src.ino.cpp" -o "D:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin\\sketch\\src.ino.cpp.o"
"C:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\tools\\xtensa-lx106-elf-gcc\\3.0.4-gcc10.3-1757bed/bin/xtensa-lx106-elf-g++" -D__ets__ -DICACHE_FLASH -U__STRICT_ANSI__ -D_GNU_SOURCE "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/include" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/lwip2/include" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/libc/xtensa-lx106-elf/include" "-ID:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin/core" -c -w -Werror=return-type -Os -g -free -fipa-pta -mlongcalls -mtext-section-literals -fno-rtti -falign-functions=4 -std=gnu++17 -MMD -ffunction-sections -fdata-sections -fno-exceptions -DMMU_IRAM_SIZE=0x8000 -DMMU_ICACHE_SIZE=0x8000 -DNONOSDK22x_190703=1 -DF_CPU=80000000L -DLWIP_OPEN_SRC -DTCP_MSS=536 -DLWIP_FEATURES=1 -DLWIP_IPV6=0 -DARDUINO=10819 -DARDUINO_ESP8266_ADAFRUIT_HUZZAH -DARDUINO_ARCH_ESP8266 "-DARDUINO_BOARD=\"ESP8266_ADAFRUIT_HUZZAH\"" -DFLASHMODE_QIO -DESP8266 "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\cores\\esp8266" "-IC:\\Users\\akehj\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\variants\\adafruit" "-IC:\\Users\\akehj\\OneDrive\\Dokument\\Arduino\\libraries\\ESP8266WiFi\\src" "D:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin\\sketch\\rESP8266.cpp" -o "D:\\project\\b4r\\willo\\kyltork\\https_Willo_AirDryerAlarm\\Objects\\bin\\sketch\\rESP8266.cpp.o"
In file included from C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/ESP8266WiFi.h:39,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\rESP8266WiFi.h:7,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RDefines.h:27,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RArduino.cpp:1:
C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/WiFiClient.h:87:10: error: conflicting return type specified for 'virtual size_t WiFiClient::availableForWrite()'
   87 |   size_t availableForWrite();
      |          ^~~~~~~~~~~~~~~~~
In file included from C:\Users\akehj\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/Stream.h:27,
                 from C:\Users\akehj\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/HardwareSerial.h:32,
                 from C:\Users\akehj\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/Arduino.h:288,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RDefines.h:8,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RArduino.cpp:1:
C:\Users\akehj\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/Print.h:80:21: note: overridden function is 'virtual int Print::availableForWrite()'
   80 |         virtual int availableForWrite() { return 0; }
      |                     ^~~~~~~~~~~~~~~~~
In file included from C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/ESP8266WiFi.h:40,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\rESP8266WiFi.h:7,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RDefines.h:27,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RArduino.cpp:1:
C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/WiFiServer.h:52:3: error: invalid abstract return type 'WiFiClient'
   52 |   WiFiClient available(uint8_t* status = NULL);
      |   ^~~~~~~~~~
In file included from C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/ESP8266WiFi.h:39,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\rESP8266WiFi.h:7,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RDefines.h:27,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RArduino.cpp:1:
C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/WiFiClient.h:45:7: note:   because the following virtual functions are pure within 'WiFiClient':
   45 | class WiFiClient : public Client, public SList<WiFiClient> {
      |       ^~~~~~~~~~
In file included from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RDefines.h:11,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RArduino.cpp:1:
C:\Users\akehj\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/Client.h:37:22: note:     'virtual void Client::flush()'
   37 |         virtual void flush() override = 0;
      |                      ^~~~~
C:\Users\akehj\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/Client.h:29:21: note:     'virtual int Client::connect(IPAddress, uint16_t)'
   29 |         virtual int connect(IPAddress ip, uint16_t port) = 0;
      |                     ^~~~~~~
C:\Users\akehj\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/Client.h:38:22: note:     'virtual void Client::stop()'
   38 |         virtual void stop() = 0;
      |                      ^~~~
In file included from C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/WiFiClientSecure.h:41,
                 from C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/WiFiServerSecure.h:20,
                 from C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/ESP8266WiFi.h:41,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\rESP8266WiFi.h:7,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RDefines.h:27,
                 from D:\project\b4r\willo\kyltork\https_Willo_AirDryerAlarm\Objects\src\B4RArduino.cpp:1:
C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/WiFiClientSecureBearSSL.h:40:17: error: 'CONST' has not been declared
   40 |     int connect(CONST IPAddress& ip, uint16_t port) override;
      |                 ^~~~~
C:\Users\akehj\OneDrive\Dokument\Arduino\libraries\ESP8266WiFi\src/WiFiClientSecureBearSSL.h:40:32: error: expected ',' or '...' before '&' token