对IoTHubClient_LL_UploadToBlob_Destroy的未定义引用

Question

我正在从arduino的AzureIotHub库的示例中编译iothub_ll_telemetry_sample。我遵循Azure/azure-iot-arduino github页面上显示的说明。

[我像-DDONT_USE_UPLOADTOBLOB -DUSE_BALTIMORE_CERT这样将platform.txt输入到build.extra_flags=-DESP8266 -DDONT_USE_UPLOADTOBLOB -DUSE_BALTIMORE_CERT后，我编译了代码并在arduino IDE上收到了此错误

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: libraries\AzureIoTHub\iothub_client_core_ll.c.o: in function `delete_event_callback_list':

C:\Users\abhij\Documents\Arduino\libraries\AzureIoTHub\src/iothub_client_core_ll.c:1174: undefined reference to `IoTHubClient_LL_UploadToBlob_Destroy'

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: libraries\AzureIoTHub\iothub_client_core_ll.c.o: in function `IoTHubClientCore_LL_Destroy':

C:\Users\abhij\Documents\Arduino\libraries\AzureIoTHub\src/iothub_client_core_ll.c:1729: undefined reference to `IoTHubClient_LL_UploadToBlob_Destroy'

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: libraries\AzureIoTHub\iothub_client_core_ll.c.o:(.text.initialize_iothub_client+0x60): undefined reference to `IoTHubClient_LL_UploadToBlob_Create'

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: libraries\AzureIoTHub\iothub_client_core_ll.c.o: in function `initialize_iothub_client':

C:\Users\abhij\Documents\Arduino\libraries\AzureIoTHub\src/iothub_client_core_ll.c:773: undefined reference to `IoTHubClient_LL_UploadToBlob_Destroy'

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: C:\Users\abhij\Documents\Arduino\libraries\AzureIoTHub\src/iothub_client_core_ll.c:872: undefined reference to `IoTHubClient_LL_UploadToBlob_Create'

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: C:\Users\abhij\Documents\Arduino\libraries\AzureIoTHub\src/iothub_client_core_ll.c:905: undefined reference to `IoTHubClient_LL_UploadToBlob_Destroy'

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: libraries\AzureIoTHub\iothub_client_core_ll.c.o: in function `create_blob_upload_module':

C:\Users\abhij\Documents\Arduino\libraries\AzureIoTHub\src/iothub_client_core_ll.c:383: undefined reference to `IoTHubClient_LL_UploadToBlob_Destroy'

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: libraries\AzureIoTHub\iothub_client_core_ll.c.o: in function `IoTHubClientCore_LL_CreateFromConnectionString':

C:\Users\abhij\Documents\Arduino\libraries\AzureIoTHub\src/iothub_client_core_ll.c:1454: undefined reference to `IoTHubClient_LL_UploadToBlob_SetOption'

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: libraries\AzureIoTHub\iothub_client_core_ll.c.o: in function `IoTHubClientCore_LL_SetOption':

C:\Users\abhij\Documents\Arduino\libraries\AzureIoTHub\src/iothub_client_core_ll.c:1558: undefined reference to `IoTHubClient_LL_UploadToBlob_SetOption'

c:/users/abhij/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: C:\Users\abhij\Documents\Arduino\libraries\AzureIoTHub\src/iothub_client_core_ll.c:2310: undefined reference to `IoTHubClient_LL_UploadToBlob_SetOption'

collect2.exe: error: ld returned 1 exit status

Answer 1

好像没有人能控制这些示例和库。将nodeMCU（v3）与AzureIoTHub库和dht_temperature_AzureIotHub_New示例结合使用时，我遇到相同的错误。解决了上面描述的缺少Blob的问题，并避免了未声明的MQTT_Protocol导致的错误之后，我必须添加“ iothubtransportmqtt.h”。

现在，在以下代码行中发生相同的错误“ collect2.exe：错误：ld返回了1个退出状态”：iotHubClientHandle = IoTHubClient_LL_CreateFromConnectionString（connectionString，MQTT_Protocol）;

没有它，至少会编译。而且，如果没有Azure库，则开发板本身可以正常工作。我们可以在这里获得一些支持吗？