Upgrade GCC for ESP32-WROOM-32

[FrancescoCrevatin]

Hello everybody.

I'm having a problem running a code on my ESP32, which errors are multiple and are almost identical (only the variable names change): 'audio_tools::mime_pcm' declared as an 'inline' variable INLINE_VAR const char* mime_pcm = "audio/pcm";.
From what I've seen on the internet I need to upgrade the GCC (at the moment I have the 5.2 version), but I really don't know what to do. I've looked at previous topics and Espressif docs, but I don't have a clue what I have to do.

If you can give me a hand I will thank you forever.

[DeepDreamer89]

I have exact the same problem. I "solved" it with adding the following code before the first occurrence of the error:

#undef INLINE_VAR
#define INLINE_VAR

In my case this was in line 13 in AudioTypes.h (in {Your_place}Arduino\libraries\arduino-audio-tools-main\src\AudioTools), so I added the code above in line 9.
So this error gone away:

C:\Users{username}\Documents\Arduino\libraries\arduino-audio-tools-main\src/AudioTools/AudioTypes.h:13:38: error: 'audio_tools::RxTxModeNames' declared as an 'inline' variable
INLINE_VAR const char* RxTxModeNames[]={"UNDEFINED_MODE","TX_MODE","RX_MODE","RXTX_MODE" };

I don't know what problems this may cause, but for me it solved the problem, the code now compiles and run...

[Jason2866]

you can not easily use a newer gcc version, since IDF 4.4 is used to compile the needed Arduino libs.
IDF 4.4 code is not ready to use newer gcc versions.