[OE-core] Problem with module.bbclass

[Steffen.Pankratz at elektrobit.com]

> -----Original Message-----
> From: Paul Eggleton [mailto:paul.eggleton at linux.intel.com]
> Sent: Thursday, May 21, 2015 3:54 PM
> To: Pankratz, Steffen
> Cc: openembedded-core at lists.openembedded.org
> Subject: Re: [OE-core] Problem with module.bbclass

 HiPaul,

> > I am using
> > http://git.openembedded.org/openembedded-
> core/tree/meta/classes/module
> > .bbcl ass as a base for my recipe to compile a kernel module outside
> > of the kernel tree.
> >
> > This is my recipe:
> >
> > DESCRIPTION = "Nouveau kernel module"
> > SECTION = "kernel/modules"
> > LICENSE = "CLOSED" #fixme
> > PR = "r0"
> > SRC_URI =
> "git://github.com/Gnurou/nouveau;protocol=https;branch=staging"
> > SRCREV = "c256f9450c613cd5075fc8c4a407686925041487"
> > S = "${WORKDIR}/git/drm/nouveau"
> > inherit module
> >
> > Naively, I hoped that would work out of the box. Of course it did not
> > :) and
> every compiler call resulted in an error message like this:
> > | make: *** [lib/nvif/notify.o] Error 1 In file included from
> > | ./lib/include/nvif/os.h:32:0,
> > |
> > |                  from ./drm/nouveau/include/nvif/object.h:4,
> > |                  from ./drm/nouveau/include/nvif/device.h:4,
> > |
> > |                  from drm/nouveau/nvif/device.c:25:
> > | /home/vagrant/repos/tk1/build/tmp/sysroots/x86_64-
> linux/usr/lib/arm-
> > | poky-l
> > | inux-gnueabi/gcc/arm-poky-linux-gnueabi/4.9.2/include/stdint.h:9:26:
> > | fatal
> > | error: stdint.h: No such file or directory|  # include_next
> > | <stdint.h>
> > |
> > |                           ^
> > |
> > | compilation terminated.
> >
> > I could resolve that issue by adding the following line to my recipe:
> >
> > EXTRA_OEMAKE='-C "${STAGING_KERNEL_DIR}"'
> >
> > And another problem I had faced was that using:
> >
> > S = "${WORKDIR}/git/drm/nouveau"
> >
> > Compiled all kernel modules inside the kernel tree, instead only the
> > nouveau kernel module.
> >
> > I could solve that as well and finally I ended up with:
> >
> > EXTRA_OEMAKE='-C "${STAGING_KERNEL_DIR}" M="${S}"/drm/nouveau/'
> >
> > Now, I am not sure if I am doing something wrong or if there maybe is
> > a problem with module.bbclass.
> 
> The original message makes it sound like the makefile for the module isn't
> using CC but instead calling gcc directly, and thus not getting the --sysroot
> option passed in - is that possible?

Not sure, but for me the makefile looks good.
Here is the code of the nouveau kernel module I am using in my recipe:

https://github.com/Gnurou/nouveau


-- 
Regards
-Steffen


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