don't compile RMTHI on unsupprted (old) platforms

lib/NeoESP32RmtHI/include/NeoEsp32RmtHIMethod.h

@@ -29,6 +29,7 @@ License along with NeoPixel.  If not, see
 #pragma once
 
 #if defined(ARDUINO_ARCH_ESP32)
+#if !defined(WLED_USE_SHARED_RMT)  && !defined(__riscv) && (ESP_IDF_VERSION_MAJOR >= 4) // WLEDMM don't compile this file on unsupported platforms
 
 // Use the NeoEspRmtSpeed types from the driver-based implementation
 #include <NeoPixelBus.h>
@@ -485,3 +486,4 @@ typedef NeoEsp32RmtHI7Ws2805InvertedMethod NeoEsp32RmtHI7Ws2814InvertedMethod;
 #endif // !defined(CONFIG_IDF_TARGET_ESP32C3)
 
 #endif
+#endif

lib/NeoESP32RmtHI/src/NeoEsp32RmtHI.S

@@ -6,6 +6,7 @@
  */
 
 #if defined(__XTENSA__) && defined(ESP32) && !defined(CONFIG_BTDM_CTRL_HLI)
+#if !defined(WLED_USE_SHARED_RMT)  && !defined(__riscv) && defined(ARDUINO_ARCH_ESP32) && (ESP_IDF_VERSION_MAJOR >= 4) // WLEDMM don't compile this file on unsupported platforms
 
 #include <freertos/xtensa_context.h>
 #include "sdkconfig.h"
@@ -260,4 +261,5 @@ ld_include_hli_vectors_rmt:
 
 
 #endif // CONFIG_BTDM_CTRL_HLI
+#endif // WLEDMM
 #endif // XTensa

lib/NeoESP32RmtHI/src/NeoEsp32RmtHIMethod.cpp

@@ -30,6 +30,7 @@ License along with NeoPixel.  If not, see
 #include <Arduino.h>
 
 #if defined(ARDUINO_ARCH_ESP32)
+#if !defined(WLED_USE_SHARED_RMT)  && !defined(__riscv) && (ESP_IDF_VERSION_MAJOR >= 4) // WLEDMM don't compile this file on unsupported platforms
 
 #include <algorithm>  
 #include "esp_idf_version.h"
@@ -504,4 +505,5 @@ esp_err_t NeoEsp32RmtHiMethodDriver::WaitForTxDone(rmt_channel_t channel, TickTy
     return rv;
 }
 
+#endif
 #endif

wled00/bus_wrapper.h

@@ -184,7 +184,7 @@ bool canUseSerial(void);   // WLEDMM (wled_serial.cpp) returns true if Serial ca
 #endif
 
 
-// RMT driver selection
+// RMT driver selection - only for Xtensa and ESP-IDF 4.x
 #if !defined(WLED_USE_SHARED_RMT)  && !defined(__riscv) && defined(ARDUINO_ARCH_ESP32) && (ESP_IDF_VERSION_MAJOR >= 4)
 
 #include <NeoEsp32RmtHIMethod.h>