RE: multiple definition of `SWI2_EGU2_IRQHandler' (when trying to add NFC support to light_switch_server Bluetooth Mesh example)

f0corner — Thu, 17 Jan 2019 18:59:35 GMT

awneil,

Thank you for helping me out!

You are right to say that it's a Linker error (not compiler), and that the error is not specific to Nordic.

I followed your advice and investigated further to find out what the problem was:

In the Mesh SDK example for the Generic OnOff Server (without Proxy feature), the SoftDevice is initialized using the mesh_softdevice_init() function, which comes from mesh_softdevice_init.c, which is where SWI2_EGU2_IRQHandler gets defined first.
But when I added support for NFC, the latter needed nrf_sdh.c (among other things), which is also defining SWI2_EGU2_IRQHandler (and performing other tasks similar to what mesh_softdevice_init.c does).
So to solve the issue, I removed mesh_softdevice_init.c from my CMakeLists.txt, and, in main.c, I replaced the call to mesh_softdevice_init() with nrf_sdh_enable_request().

Now it works!

Once more, thank you for your advice. A+

Frank

RE: multiple definition of `SWI2_EGU2_IRQHandler' (when trying to add NFC support to light_switch_server Bluetooth Mesh example)

awneil — Thu, 17 Jan 2019 15:10:46 GMT

[quote userid="27166" url="~/f/nordic-q-a/42672/multiple-definition-of-swi2_egu2_irqhandler-when-trying-to-add-nfc-support-to-light_switch_server-bluetooth-mesh-example"] I was wondering if anyone had experienced this error (error: multiple definition of `SWI2_EGU2_IRQHandler' ) in a similar context,[/quote]

Yes: it is a general 'C' thing - nothing specific to Nordic.

The error means what it says - you have multiple (ie, more than one) definitions of SWI2_EGU2_IRQHandler

[quote userid="27166" url="~/f/nordic-q-a/42672/multiple-definition-of-swi2_egu2_irqhandler-when-trying-to-add-nfc-support-to-light_switch_server-bluetooth-mesh-example"] I am unable to compile (because of the error above).[/quote]

Are you sure it's a compiler error - not a Linker error ?

Remove the excess definition(s)!

You haven't mentioned what toolchain & IDE you're using, but they do usually tell you where all the definitions were found - so you need to look through them, and decide which to keep, and which to remove.

failing that, just do a search through your project for all occurrences of "SWI2_EGU2_IRQHandler"