'to_string' is not a member of 'std' in ZgatewayRF.ino

[reimerp]

Before submitting a problem please check the troubleshooting section
https://docs.openmqttgateway.com/upload/troubleshoot.html

Describe the bug
Compile Error:
/workspaces/pio-workspace/main/ZgatewayRF.ino: In function 'void RFtoMQTT()':
/workspaces/pio-workspace/main/ZgatewayRF.ino:134:18: error: 'to_string' is not a member of 'std'
rawDump += std::to_string(raw[i]);

To Reproduce
git checkout v1.7.0
enable + '-DZgatewayRF="RF"' in environments.ini
pio run -e rfbridge-direct

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
n/a

Environment (please complete the following information):

• OpenMQTTGateway version used (V0.9.3, 0.8, development)
• Library version related to the problem you have (if you have troubles with RF provide the version of RCSwitch library)
• For IR and RF clarify if you tested with the basic examples given with these libraries

Additional context
Add any other context about the problem here.
Processing rfbridge-direct (platform: espressif8266@^2; board: esp8285; framework: arduino)

CONFIGURATION: https://docs.platformio.org/page/boards/espressif8266/esp8285.html
PLATFORM: Espressif 8266 (2.6.3) > Generic ESP8285 Module
HARDWARE: ESP8266 80MHz, 80KB RAM, 1MB Flash
PACKAGES: 
 - framework-arduinoespressif8266 @ 3.20704.0 (2.7.4) 
 - tool-esptool @ 1.413.0 (4.13) 
 - tool-esptoolpy @ 1.30000.201119 (3.0.0) 
 - toolchain-xtensa @ 2.40802.200502 (4.8.2)

PlatformIO Core, version 6.1.14
xtensa-lx106-elf-g++ (GCC) 4.8.2

If I remove -DZgatewayRF="RF"' project compiles.
I tried to reproduce the error in a very small project, this compiles in esp32 bur not in esp8266
-std is set to gnu++11 in both calls

• You should not have a compilation error if you use the versions of the libraries linked into the libraries folder, this badges show you the state of the compilation
  
• If you are not sure this is a bug or an enhancement post your question to the forum below
  

#include <Arduino.h>
#include <string>

void setup() {
  std::to_string(0);
}

void loop() {
}

[env:esp01]
platform = espressif8266
framework = arduino
board = esp01

[env:esp32]
platform = espressif32
framework = arduino
board = esp32dev

pio run -e esp01 fails: 'to_string' is not a member of 'std'
pio run -e esp32 works

[reimerp]

if I change in environments.ini

[env:rfbridge-direct]
#platform = espressif8266@^2
with:
platform = ${com.esp8266_platform}

the toolchain updates

CONFIGURATION: https://docs.platformio.org/page/boards/espressif8266/esp8285.html
PLATFORM: Espressif 8266 (4.1.0) > Generic ESP8285 Module
HARDWARE: ESP8266 80MHz, 80KB RAM, 1MB Flash
PACKAGES: 
 - framework-arduinoespressif8266 @ 3.30101.0 (3.1.1) 
 - tool-esptool @ 1.413.0 (4.13) 
 - tool-esptoolpy @ 1.30000.201119 (3.0.0) 
 - toolchain-xtensa @ 2.100300.220621 (10.3.0)

the code seems to compile, but I got tons on linker errors.

[reimerp]

I checked out a fresh copy, and also development behaves the way. I replaced the rawdump block in main/ZgatewayRF.ino with the one from #a6c0a3b1, which is not relying on std:to_string and build is ok even with on toolchain.

[1technophile]

If you don't need raw dump, I will comment it.
If you need it, try to use a char array instead.