Hello,

I'm using Yocto (dizzy) with meta-ti and the linux-ti-staging kernel 3.14.x to 
build for BeagleBone Black.

I've written a custom char driver with several ioctl() calls, and I'm patching 
that into the linux-ti-staging kernel. The driver adds a new UAPI header file 
that goes in the kernel tree under include/uapi/linux/mydriver.h, to define the 
ioctl commands.

I've got a test application to use that custom char driver. I've also written a 
library libmydriver, to provide a more user-friendly interface to the ioctl 
calls. Both want to include the mydriver.h from the Linux headers. The 
application and library are using autotools to build. I've written a Yocto 
recipe to build them via autotools.

My problem is this: my application and library fail to build under Yocto, due 
to missing the Linux kernel header file mydriver.h 
(/usr/include/linux/mydriver.h is where I'd expect it to appear in the build 
environment root filesystem).

What do I need to change to cause the custom Linux kernel build to install the 
kernel header files, including mydriver.h into the Yocto build for other 
packages to use during build?

(I don't want it installed on the target, only in the build sysroot, although 
I'm not familiar enough with Yocto to understand how it installs include files 
to the build sysroot, but not the target sysroot.) I can see that Linux kernel 
headers are being installed to tmp/sysroots/beaglebone/usr/include/linux/... 
but not including mydriver.h; I'm not sure what package is installing these 
headers. (I can also see that my header is installed at 
tmp/sysroots/beaglebone/usr/src/kernel/include/uapi/linux/mydriver.h, but 
that's not the same.)

-- 
Craig McQueen

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