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lnlp / LMIC-node

LMIC-node | One example to rule them all. LMIC-node is an example LoRaWAN application for a node that can be used with The Things Network. It demonstrates how to send uplink messages, how to receive downlink messages, how to implement a downlink command and it provides useful status information. With LMIC-node it is easy to get a working node quickly up and running. LMIC-node supports many popular (LoRa) development boards out of the box. It uses the Arduino framework, the LMIC LoRaWAN library and PlatformIO.
MIT License
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Failing build: multiple definition of `hal_init' #41

Closed gkaretka closed 2 years ago

gkaretka commented 2 years ago

Hello, I'm building this project with these libraries for heltec_wireless_stick board.

Dependency Graph

and I am getting this error message Linking .pio\build\heltec_wireless_stick\firmware.elf c:/users/xxx/.platformio/packages/toolchain-xtensa-esp32/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\xxx\.platformio\packages\framework-arduinoespressif32\tools\sdk\esp32\lib\libpp.a(hal_mac.o): in functionhal_init': (.text.hal_init+0xc8): multiple definition of hal_init'; .pio\build\heltec_wireless_stick\libc40\libMCCI LoRaWAN LMIC library.a(hal.cpp.o):C:\Users\xxx\Documents\GitHub\LMIC-node/.pio/libdeps/heltec_wireless_stick/MCCI LoRaWAN LMIC library/src/hal/hal.cpp:416: first defined here collect2.exe: error: ld returned 1 exit status *** [.pio\build\heltec_wireless_stick\firmware.elf] Error 1

JohnMacrae commented 2 years ago

You can solve this by using v3.5.0 of the espressif 32 platform. Although not a permanent fix, it will get you going. N.B. you will need to uninstall espressif 32 completely and then reinstall 3.5.0. HTH

Manwil00 commented 2 years ago

Hello,

I had the same issue using a TTGO LoRa32 v2.1 board

It seems to be related to the MCCI LoRaWAN LMIC Library https://github.com/mcci-catena/arduino-lmic and ESP32 based boards. The same github issue exists on their github page: https://github.com/mcci-catena/arduino-lmic/issues/714 They suggests adding #define hal_init LMICHAL_init to the lmic_project_config.h or if using PlatformIO to the command line. https://github.com/mcci-catena/arduino-lmic/issues/714#issuecomment-822051171

So I got it working by adding -D hal_init=LMICHAL_init to the mcci_lmic build_flags in the platformio.ini file

lnlp commented 2 years ago

Thanks! @CaptnAwsome and @JohnMacrae

I have added the workaround to LMIC-node and will therefore close this issue.