Unable to compile DFRobot_BME680_IC2 with Arduino IDE

[dfrobot]

Unable to compile DFRobot_BME680_IC2 with Arduino IDE

[aemondis]

I have tried updating the BME680 driver to 3.5.9 and also followed the steps for compiling BSEC from the project's GitHub Readme - and I now have a different error entirely, pointing right back to the DFRobot libraries:

C:\My Documents\Arduino\libraries\DFRobot_BME680-master\DFRobot_BME680.cpp: In member function 'int8_t DFRobot_BME680::iaqUpdate()':
C:\My Documents\Arduino\libraries\DFRobot_BME680-master\DFRobot_BME680.cpp:116:86: error: 'calc_gas_resistance' was not declared in this scope

 bme680_data.gas_resistance = calc_gas_resistance(gasADC, gasRange, &bme680_sensor);

                                                                                  ^

exit status 1
Error compiling for board Arduino/Genuino Uno.

[rado99]

I face the same problem here. Did you fixed the problem? Any suggestions, because I am on the first step with a lot of errors.

[bryn51]

Was this problem ever solved. (?)
I have the situation where the library compiles and links and runs OK (on a Arduino Mega 2560 with plenty of memory) using the example ino files, but when I add similar code to my own project, (after fixing all typos etc) I get errors similar to the above. The error is caused by an unhappy linker, but its entirely unclear as to what is the cause. I have tried lots of things, spending hours on the issue, but I'm flying blind.
At this point, I am chasing why the linker is unable to find bme_update_subscription. That function appears to have gone missing. It is defined (templated) in bsec_interface.h but neither I nor the linker can find the function code. There are other similar issues with other functions.