Problem using external library

Libraries
, ,
24

the error persists…

Processing esp32doit-devkit-v1 (platform: espressif32; framework: arduino; board: esp32doit-devkit-v1)
----------------------------------------------------------------------------------------------------------------------------------------------Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp32doit-devkit-v1.html
PLATFORM: Espressif 32 (3.3.1) > DOIT ESP32 DEVKIT V1
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (esp-prog) External (esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)
PACKAGES:
 - framework-arduinoespressif32 3.10006.210326 (1.0.6)
 - tool-esptoolpy 1.30100.210531 (3.1.0)
 - toolchain-xtensa32 2.50200.97 (5.2.0)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 29 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <SCServo-master> 0.0.0+20210817123422
Building in release mode
Compiling .pio\build\esp32doit-devkit-v1\src\Blink.cpp.o
Generating partitions .pio\build\esp32doit-devkit-v1\partitions.bin
Compiling .pio\build\esp32doit-devkit-v1\libfb7\SCServo-master\SCS.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\libfb7\SCServo-master\SCSCL.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\libfb7\SCServo-master\SCSerail.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\libfb7\SCServo-master\SMSBL.cpp.o
src\Blink.cpp:28:0: warning: "LED_PIN_GPIO" redefined
 #define LED_PIN_GPIO (gpio_num_t) 2
 ^
<command-line>:0:0: note: this is the location of the previous definition
src\Blink.cpp:29:0: warning: "BUTTON_PIN_GPIO" redefined
 #define BUTTON_PIN_GPIO (gpio_num_t) 1
 ^
<command-line>:0:0: note: this is the location of the previous definition
Compiling .pio\build\esp32doit-devkit-v1\libfb7\SCServo-master\SMSCL.cpp.o
Archiving .pio\build\esp32doit-devkit-v1\libFrameworkArduinoVariant.a
Indexing .pio\build\esp32doit-devkit-v1\libFrameworkArduinoVariant.a
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\Esp.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\FunctionalInterrupt.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\HardwareSerial.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\IPAddress.cpp.o
Archiving .pio\build\esp32doit-devkit-v1\libfb7\libSCServo-master.a
Indexing .pio\build\esp32doit-devkit-v1\libfb7\libSCServo-master.a
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\IPv6Address.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\MD5Builder.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\Print.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\Stream.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\StreamString.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\WMath.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\WString.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\base64.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\cbuf.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-adc.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-bt.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-cpu.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-dac.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-gpio.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-i2c.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-ledc.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-log.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-matrix.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-misc.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-psram.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-rmt.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-sigmadelta.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-spi.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-time.c.o
C:\Users\HADOUNE\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-spi.c: In function 'spiTransferBytesNL':
C:\Users\HADOUNE\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-spi.c:922:39: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
                 uint8_t * last_out8 = &result[c_longs-1];
                                       ^
C:\Users\HADOUNE\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-spi.c:923:40: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
                 uint8_t * last_data8 = &last_data;
                                        ^
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-timer.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-touch.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\esp32-hal-uart.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\libb64\cdecode.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\libb64\cencode.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\main.cpp.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\stdlib_noniso.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\wiring_pulse.c.o
Compiling .pio\build\esp32doit-devkit-v1\FrameworkArduino\wiring_shift.c.o
Archiving .pio\build\esp32doit-devkit-v1\libFrameworkArduino.a
Indexing .pio\build\esp32doit-devkit-v1\libFrameworkArduino.a
Linking .pio\build\esp32doit-devkit-v1\firmware.elf
.pio\build\esp32doit-devkit-v1\libFrameworkArduino.a(main.cpp.o):(.literal._Z8loopTaskPv+0x8): undefined reference to `setup()'
.pio\build\esp32doit-devkit-v1\libFrameworkArduino.a(main.cpp.o):(.literal._Z8loopTaskPv+0xc): undefined reference to `loop()'
.pio\build\esp32doit-devkit-v1\libFrameworkArduino.a(main.cpp.o): In function `loopTask(void*)':
C:\Users\HADOUNE\.platformio\packages\framework-arduinoespressif32\cores\esp32/main.cpp:18: undefined reference to `setup()'
C:\Users\HADOUNE\.platformio\packages\framework-arduinoespressif32\cores\esp32/main.cpp:21: undefined reference to `loop()'
collect2.exe: error: ld returned 1 exit status
*** [.pio\build\esp32doit-devkit-v1\firmware.elf] Error 1
======================================================== [FAILED] Took 19.19 seconds ========================================================
The terminal process "C:\Users\HADOUNE\.platformio\penv\Scripts\platformio.exe 'run'" terminated with exit code: 1.

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and this one if i use arduino-wifiscan file, it works:

Processing esp32dev (platform: espressif32; framework: arduino; board: esp32dev)    
------------------------------------------------------------------------------------Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp32dev.html
PLATFORM: Espressif 32 (3.3.1) > Espressif ESP32 Dev Module
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (esp-prog) External (esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)PACKAGES:
 - framework-arduinoespressif32 3.10006.210326 (1.0.6)
 - tool-esptoolpy 1.30100.210531 (3.1.0)
 - toolchain-xtensa32 2.50200.97 (5.2.0)
Converting WiFiScan.ino
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 29 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <WiFi> 1.0
Building in release mode
Compiling .pio\build\esp32dev\src\WiFiScan.ino.cpp.o
Generating partitions .pio\build\esp32dev\partitions.bin
Compiling .pio\build\esp32dev\lib642\WiFi\ETH.cpp.o
Compiling .pio\build\esp32dev\lib642\WiFi\WiFi.cpp.o
Compiling .pio\build\esp32dev\lib642\WiFi\WiFiAP.cpp.o
Compiling .pio\build\esp32dev\lib642\WiFi\WiFiClient.cpp.o
Compiling .pio\build\esp32dev\lib642\WiFi\WiFiGeneric.cpp.o
Compiling .pio\build\esp32dev\lib642\WiFi\WiFiMulti.cpp.o
Compiling .pio\build\esp32dev\lib642\WiFi\WiFiSTA.cpp.o
Compiling .pio\build\esp32dev\lib642\WiFi\WiFiScan.cpp.o
Compiling .pio\build\esp32dev\lib642\WiFi\WiFiServer.cpp.o
Compiling .pio\build\esp32dev\lib642\WiFi\WiFiUdp.cpp.o
Archiving .pio\build\esp32dev\libFrameworkArduinoVariant.a
Indexing .pio\build\esp32dev\libFrameworkArduinoVariant.a
Compiling .pio\build\esp32dev\FrameworkArduino\Esp.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\FunctionalInterrupt.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\HardwareSerial.cpp.o
Archiving .pio\build\esp32dev\lib642\libWiFi.a
Indexing .pio\build\esp32dev\lib642\libWiFi.a
Compiling .pio\build\esp32dev\FrameworkArduino\IPAddress.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\IPv6Address.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\MD5Builder.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\Print.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\Stream.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\StreamString.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\WMath.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\WString.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\base64.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\cbuf.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-adc.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-bt.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-cpu.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-dac.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-gpio.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-i2c.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-ledc.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-log.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-matrix.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-misc.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-psram.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-rmt.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-sigmadelta.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-spi.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-time.c.o
C:\Users\HADOUNE\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-spi.c: In function 'spiTransferBytesNL':
C:\Users\HADOUNE\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-spi.c:922:39: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
                 uint8_t * last_out8 = &result[c_longs-1];
                                       ^
C:\Users\HADOUNE\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-spi.c:923:40: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
                 uint8_t * last_data8 = &last_data;
                                        ^
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-timer.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-touch.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-uart.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\libb64\cdecode.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\libb64\cencode.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\main.cpp.o
Compiling .pio\build\esp32dev\FrameworkArduino\stdlib_noniso.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\wiring_pulse.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\wiring_shift.c.o
Archiving .pio\build\esp32dev\libFrameworkArduino.a
Indexing .pio\build\esp32dev\libFrameworkArduino.a
Linking .pio\build\esp32dev\firmware.elf
Retrieving maximum program size .pio\build\esp32dev\firmware.elf
Checking size .pio\build\esp32dev\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [=         ]  11.6% (used 37852 bytes from 327680 bytes)
Flash: [=====     ]  48.7% (used 638162 bytes from 1310720 bytes)
Building .pio\build\esp32dev\firmware.bin
esptool.py v3.1
Merged 1 ELF section
=========================== [SUCCESS] Took 26.05 seconds ===========================
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25

This thread is a bit old but I thought I would shed some light on the Warning you are seeing.
I believe the issue is in the Espressif library esp32-hal-spi.c file where there is an incompatible pointer.
The ‘result’ and ‘last_data’ are initialized as uint32_t.

The original code:
uint8_t * last_out8 = &result[c_longs-1];
uint8_t * last_data8 = &last_data;

To this:
uint32_t * last_out8 = &result[c_longs-1];
uint32_t * last_data8 = &last_data;

I made this change and it worked for me.
I believe they fixed it in newer versions but those versions break my code so I’m kinda stuck with it until I can find the time to rewrite to accommodate the newer changes.

Richard