Naming Conflict: attribute_t in M5Unified and Matter Libraries

[kyjibato]

Description

When compiling an Arduino project that uses the Arduino-ESP32 core Matter library (v3.1.0) together with M5Unified (v0.2.2) on M5Stack Atom, I encounter a compilation error caused by an ambiguous reference to attribute_t. It appears that the Matter library defines attribute_t in esp_matter_core.h, and M5Unified (via M5GFX) also declares attribute_t as an enum in enum.hpp.

Sketch

#include <M5Unified.h>
#include <Matter.h>

void setup() {
  M5.begin();
  Matter.begin();

  // ...
}

void loop() {
  M5.update();
  // ...
}

Debug Message

In file included from .../MatterGenericSwitch.h:20,
                 from .../Matter.h:22,
                 from src/main.cpp:23:
/.../MatterEndPoint.h:41:3: error: reference to 'attribute_t' is ambiguous
   41 |   attribute_t *getAttribute(uint32_t cluster_id, uint32_t attribute_id) {
      |   ^~~~~~~~~~~

... (multiple lines with similar 'attribute_t' is ambiguous errors) ...

Related espressif/arduino-esp32#10804

[SuGlider]

This issue is solved by ESP32 Arduino PR espressif/arduino-esp32#10807