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Old 12-19-2012, 06:02 PM   #1
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Undefined Variables During MODPOST

I am building a kernel for an android phone. I transplanted an updated version of the WiFi code from Broadcomm.

Doing this involved adjusting Kconfigs and Makefiles to point to the files I added and I got the code to build properly without warning or error.

Until I get to the MODPOST part. Then I get these errors:

ERROR: "wl_iw_handler_def" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!
ERROR: "wl_iw_event" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!
ERROR: "wl_iw_detach" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!
ERROR: "wl_iw_get_wireless_stats" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!
ERROR: "wl_iw_ioctl" [drivers/net/wireless/bcmdhd/dhd.ko] undefined!

I am not sure where/how to correct these as I have never seen an error like this. I am used to being given a file and line location for what needs to be fixed.

I read that this may have to do with exporting them, but I still don't know where or how to do that, and I wonder why that would not already be in the code if it were the culprit.

Any input on where to look for what is causing this would be greatly appreciated.


Old 12-21-2012, 03:39 PM   #2
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You can check WiFi driver makefile to make sure the compiler option match with your kernel.
Old 03-14-2013, 11:35 AM   #3
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I've got the same question. I checked the driver makefile and the option look the same. How did you solve the error ?
Old 03-14-2013, 02:04 PM   #4
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I reverted my changes. Never found a solution that allowed me to keep the new files.
Old 09-17-2013, 09:05 PM   #5
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Just thought I'd post my solution in case anyone else comes across this problem.

This fix solves the error, I can't guarantee it'll compile a complete driver just yet as my kernel has other problems.

Add wl_iw.o to DHDOFILES in bcmdhd/Makefile

#define USE_IW
to bcmdhd/wl_iw.c above
#if defined(USE_IW)


Last edited by m0tter; 09-17-2013 at 09:06 PM. Reason: clarity


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