Compiler error while using AudioSourceSDFAT.h

[kaernter53]

Hello, I am trying to compile the example
.pio\libdeps\esp-wrover-kit\audio-tools\examples\examples-communication\a2dp\player-sdfat-a2dp
under PlatformIO . I am using the following platformio.ini settings -

[env:esp-wrover-kit]
platform = https://github.com/platformio/platform-espressif32.git
board = esp-wrover-kit
framework = arduino
lib_deps = https://github.com/pschatzmann/arduino-audio-tools. git
https://github.com/pschatzmann/arduino-libhelix.git
https://github.com/pschatzmann/ESP32-A2DP.git
https://github.com/greiman/SdFat.git
build_flags = -DCORE_DEBUG_LEVEL=5 -Wno-unused-variable -Wno-unused-but-set-variable -Wno-unused-function -Wno-format-extra-args
monitor_speed = 115200
monitor_filters = esp32_exception_decoder.

When compiling, I get the error message -

src/main.cpp:25:1: error: invalid use of template-name ‘audio_tools::AudioSourceSDFAT’ without an argument list
AudioSourceSDFAT source(startFilePath, ext, chipSelect, speedMHz, spi_mode,setupIndex);
^~~~~~~~~~~~~~~~src/main.cpp:25:1: note: class template argument deduction is only available with -std=c++17 or -std=gnu++17In file included from src/main.cpp:13:
.pio/libdeps/esp-wrover-kit/audio-tools/src/AudioTools/Disk/AudioSourceSDFAT.h:28:7: note: ‘template<class AudioFs, class AudioFile>
class audio_tools::AudioSourceSDFAT’ declared here class AudioSourceSDFAT : public AudioSource { ^~~~~~~~~~~~~~~~src/main.cpp:28:20: error: 'sosrc/main.cpp:28:20: error: ‘source’ was not declared in this scope
AudioPlayer player(source, i2s, decoder);

I have tried various examples, all of which use the “AudioSourceSDFAT.h” library, always with the same error message.
I need help, as I don't know what else to do. Examples using the “AudioSourceSD.h” library work fine. Thanks in advance for any help.

[pschatzmann]

I think the error message is pretty speaking. ^~~~~~~~~~~~~~~~src/main.cpp:25:1: note: class template argument deduction is only available with -std=c++17 or -std=gnu++17In file included from src/main.cpp:13:

So either,

• Use an actual compiler version that supports c++17 or
• Use the legacy supported syntax AudioSourceSDFAT<> source(startFilePath, ext);
• Specifiy the SDFAT data types that you want to use: e.g. AudioSourceSDFAT<SdFat32, File32> source(startFilePath, ext);

[kaernter53]

Thank you for the support. The use of the c++17 Compiler had'nt change anything, but the use of the lagacy supported Syntax solve the problem. Thanks again and have a nice WE