Re: [Ltib] config option use BSP kernel headers with >= linux-2.6.17

[Peter Barada]

On 03/22/2013 05:49 AM, Mike Goins wrote:
> On Thu, Mar 21, 2013 at 3:32 PM, Peter Barada <address@hidden> wrote:
> > On 03/21/2013 02:36 PM, Stuart Hughes wrote:
> > > Hi Aaron,
> > >
> > >  From what I recall 'make headers_install' is not sufficient on all
> > > platforms to provide the required interface.  IIRC the
> > > PKG_KERNEL_WANT_HEADERS leaves the actual kernel headers unpacked so
> > > that some packages can reach indirectly and grab what they want.
> > Stuart,
> > with the diff I provided (and adding
> > CNFIG_PKG_WANT_KERNEL_HEADERS_INSTALL=y in your platform .config), it
> > does install the kernel headers and is able to build kernel modules and
> > a bunch of the packages that need kernel headers.  Its independed of
> > whether the kernel source is left unpacked...
>
> I haven't found headers_install (or the manual version of the
> equivalent) sufficient to build out-of-tree kernel modules without the
> kernel source.  Kbuild system seems to build and use host binaries
> which can't be "installed" into the rootfs.

What I meant was "make headers_install" works for all the packages I've 
built that need the kernel headers(outside of kernel modules). Yes, 
building a kernel module needs the kernel source (to get the Makefile 
structure to build/install the module).

> > > Regards, Stuart
> > >
> > > On 19/03/13 19:35, Aaron Wegner wrote:
> > > > Going through the Git log of the Linux kernel it seems like there has been
> > > > a basic implementation of 'make headers_install' since about 2.6.17.  I
> > > > was trying to install the headers of a 3.8 kernel and running into some
> > > > problems.  I seemed to be able to overcome these by editing
> > > > dist/lfs-5.1/kernel/kernel-common.tmpl and replacing the
> > > > PKG_KERNEL_WANT_HEADERS section with the following.
> > > >
> > > > if [ -n "$PKG_KERNEL_WANT_HEADERS" ]
> > > > then
> > > >      make ARCH=$LINTARCH HOSTCC="$BUILDCC"
> > > > INSTALL_HDR_PATH=$RPM_BUILD_ROOT/%{pfx}/usr/src/linux headers_install
> > > > fi
> > > >
> > > > Maybe this could be a patch?  Not exactly sure how to specify the
> > > > condition that the kernel version is greater than or equal to one in which
> > > > the 'make headers_install' is working well, but for recent kernels the
> > > > current LTIB spec file fails since the includes are reordered from the old
> > > > way.
> > > >
> > > >
> > > > Thanks,
> > > >
> > > > Aaron
> > > >
> > > >
> > > >
> > > > _______________________________________________
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> >
> > --
> > Peter Barada
> > address@hidden
> >
> >
> > _______________________________________________
> > LTIB home page: http://ltib.org
> >
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--
Peter Barada
address@hidden