There is an issue with the order in which private fields are declared in cpp files. It's a trivial fix and will issue a PR soon. This issue is just to reference the branch name for PR and leave a trace in case someone hits the same error. Adding -Werror=reorder build flag workaround does not work for this issue.
Library Manager: M5Stack @ 0.1.9 has been installed!
Library Manager: Installing NTPClient
Library Manager: Warning! More than one package has been found by NTPClient requirements:
- arduino-libraries/NTPClient @ 3.1.0
- limiteddata/NTPClient @ 3.1.0
- mbed-dietergraef/NTPClient @ 0.0.0-alpha+sha.584a18640e84
- mbed-robot-arm-demo-team/NTPClient @ 0.0.0+sha.9a7b8df5fad7
- mbed-kkempeneers/NTPClient @ 0.0.0+sha.537dcd4ff837
- mbed-ibiltari/NTPClient @ 0.0.0+sha.f31bb718d362
- mbed-sparkfun/NTPClient @ 0.0.0+sha.881559865a93
- mbed-vpcola/NTPClient @ 0.0.0+sha.0b96fbd7cfca
- mbed-kubegmbh/NTPClient @ 0.0.0+sha.c2440e1c92cc
- mbed-lmussier/NTPClient @ 0.0.0+sha.175284afeb38
Library Manager: Please specify detailed REQUIREMENTS using package owner and version (showed above) to avoid name conflicts
Library Manager: NTPClient @ 3.1.0 has been installed!
Found 29 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <M5Stack> 0.1.9
| |-- <FS> 1.0
| |-- <SPIFFS> 1.0
| | |-- <FS> 1.0
| |-- <SPI> 1.0
| |-- <Wire> 1.0.1
| |-- <SD(esp32)> 1.0.5
| | |-- <FS> 1.0
| | |-- <SPI> 1.0
|-- <NTPClient> 3.1.0
|-- <cfGUI> 0.3.0
| |-- <M5Stack> 0.1.9
| | |-- <FS> 1.0
| | |-- <SPIFFS> 1.0
| | | |-- <FS> 1.0
| | |-- <SPI> 1.0
| | |-- <Wire> 1.0.1
| | |-- <SD(esp32)> 1.0.5
| | | |-- <FS> 1.0
| | | |-- <SPI> 1.0
|-- <WiFi> 1.0
// a usual compilation output with couple of warnings removed
Compiling .pio\build\m5stack-core-esp32\lib66b\cfGUI\ressources\wifi3.c.o
lib\cfGUI\src\Button.cpp: In member function 'virtual void Codingfield::UI::Button::Draw()':
lib\cfGUI\src\Button.cpp:98:50: warning: 'yTitle' may be used uninitialized in this function [-Wmaybe-uninitialized]
M5.Lcd.drawString(title.c_str(), x, yTitle);
^
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\ETH.cpp.o
Archiving .pio\build\m5stack-core-esp32\libbdf\libM5Stack.a
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\WiFi.cpp.o
In file included from lib\cfGUI\src\Widget.cpp:1:0:
lib\cfGUI\src\Widget.h: In constructor 'Codingfield::UI::Widget::Widget(Codingfield::UI::Widget*, Codingfield::UI::Point, Codingfield::UI::Size)':
lib\cfGUI\src\Widget.h:81:24: error: 'Codingfield::UI::Widget::parent' will be initialized after [-Werror=reorder]
Widget* parent = nullptr;
^
lib\cfGUI\src\Widget.h:79:13: error: 'Codingfield::UI::Point Codingfield::UI::Widget::position' [-Werror=reorder]
Point position;
^
lib\cfGUI\src\Widget.cpp:9:1: error: when initialized here [-Werror=reorder]
Widget::Widget(Widget* parent, Point position, Size size) : parent{parent}, position{position}, size {size} {
^
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\WiFiAP.cpp.o
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\WiFiClient.cpp.o
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\WiFiGeneric.cpp.o
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\WiFiMulti.cpp.o
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\WiFiSTA.cpp.o
cc1plus.exe: some warnings being treated as errors
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\WiFiScan.cpp.o
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\WiFiServer.cpp.o
Compiling .pio\build\m5stack-core-esp32\lib5bc\WiFi\WiFiUdp.cpp.o
*** [.pio\build\m5stack-core-esp32\lib66b\cfGUI\Widget.cpp.o] Error 1
In file included from lib\cfGUI\src\WidgetMosaic.cpp:1:0:
lib\cfGUI\src\WidgetMosaic.h: In constructor 'Codingfield::UI::WidgetMosaic::WidgetMosaic(Codingfield::UI::Widget*, Codingfield::UI::Point, Codingfield::UI::Size, int32_t, int32_t)':
lib\cfGUI\src\WidgetMosaic.h:25:15: error: 'Codingfield::UI::WidgetMosaic::nbColumns' will be initialized after [-Werror=reorder]
int32_t nbColumns;
^
lib\cfGUI\src\WidgetMosaic.h:24:15: error: 'int32_t Codingfield::UI::WidgetMosaic::nbRows' [-Werror=reorder]
int32_t nbRows;
^
lib\cfGUI\src\WidgetMosaic.cpp:4:1: error: when initialized here [-Werror=reorder]
WidgetMosaic::WidgetMosaic(Widget* parent, Point position, Size size, int32_t nbColumns, int32_t nbRows) : Widget(parent, position,
size),
^
cc1plus.exe: some warnings being treated as errors
*** [.pio\build\m5stack-core-esp32\lib66b\cfGUI\WidgetMosaic.cpp.o] Error 1
==================================================== [FAILED] Took 30.94 seconds ====================================================
There is an issue with the order in which private fields are declared in cpp files. It's a trivial fix and will issue a PR soon. This issue is just to reference the branch name for PR and leave a trace in case someone hits the same error. Adding -Werror=reorder build flag workaround does not work for this issue.