On 5/26/2011 11:47 PM, Gabor Z. Papp wrote:
* Kay Sievers<kay.sievers@xxxxxxxx>: | udev 171 | ======== | Bugfixes. [...] | udev 169 | ======== | Bugfixes. | We require at least Linux kernel 2.6.32 now. CC extras/input_id/input_id.o extras/input_id/input_id.c: In function 'test_key': extras/input_id/input_id.c:167: error: 'BTN_TRIGGER_HAPPY' undeclared (first use in this function) extras/input_id/input_id.c:167: error: (Each undeclared identifier is reported only once extras/input_id/input_id.c:167: error: for each function it appears in.) make[2]: *** [extras/input_id/input_id.o] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2 $ uname -a Linux gzp 2.6.32.41 #1 SMP PREEMPT Tue May 24 09:17:23 CEST 2011 i686 GNU/Linux
I believe that BTN_TRIGGER_HAPPY was added to linux/input.h in the 2.6.34 kernel.
Given that the udev function in question is attempting to differentiate between KEY_* and BTN_* events and given that KEY_* and BTN_* events are intermixed numerically, I cannot think of a reliable solution (even the current implementation is not reliable).
When I wrote eventlircd, my solution to this problem (I wanted to separate keyboard events from mice and joystick events) was to write an awk script that created a look up array for KEY_* versus BTN_* by parsing linux/input.h. I used the autoconf archives macro AX_ABSOLUTE_HEADER to locate linux/input.h at build time in the configure phase. While not ideal, it was the best hack I could come up with.
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