Re: building 2.6.26 kernel source fails on squeeze
On Mon, 18 Apr 2011, Ben Hutchings wrote:
On Mon, 2011-04-18 at 05:58 +0530, Faheem Mitha wrote:
On Mon, 18 Apr 2011, Ben Hutchings wrote:
On Mon, 2011-04-18 at 02:39 +0530, Faheem Mitha wrote:
On Sun, 17 Apr 2011, Ben Hutchings wrote:
On Sun, 2011-04-17 at 16:51 +0100, Ben Hutchings wrote:
On Sun, 2011-04-17 at 20:42 +0530, Faheem Mitha wrote:
Hi,
Compilation of 2.6.26 Debian sources from lenny on squeeze fails with the
following below. The only change I made was to set
CONFIG_SYSFS_DEPRECATED_V2=n. See patch below. The command I used was
fakeroot make KDEB_PKGVERSION=custom.1.0 -f debian/rules.gen binary-arch_i386_none_686-bigmem
Am I missing something obvious? Please CC me on any reply. I'm not
subscribed. Thanks in advance.
[...]
KDEB_PKGVERSION has no effect. You need to change the ABI version in
debian/config/defines.
I'm just trying to change the name of the package (from the default of
linux-image-2.6.26-2-686-bigmem to presumably something like
linux-image-2.6.26.custom.1.0-2-686-bigmem) so that it does not replace my
currently installed 2.6.26 version, and I can distinguish it from the
stock Debian kernels. I was attempting to follow Section 4.5 in
http://kernel-handbook.alioth.debian.org/ch-common-tasks.html.
It doesn't look like a good fit with the other instructions in 4.2.4, but
I tried to mix them together.
These are in different sections for a good reason!
No doubt. However, I want to rebuild the Debian stock kernel with the one
minor alteration to the config I've already mentioned, and produce a
binary linux-image package with a different name. How do I do this?
Follow section 4.2.
I don't see how to alter debian/config/defines to do this. To be honest, I
don't even know what this file is for.
It defines certain parameters for the Debian packaging. The ABI number
is set on the second line of the file.
Ok. In that case, I don't see how this is relevant to what I'm trying to
do.
Firstly, your initial build failed at the ABI check: the new kernel will
not be compatible with out-of-tree modules built for 2.6.26-2-686-bigmem
and the kernel version (as shown by uname -r; not the package version)
must be changed.
Secondly, you want to be able to install the new package in parallel
with the old one. Therefore the package name must change.
The solution to both of these is to change the ABI number (or name,
rather; we use numbers but you don't have to).
Well, I followed your instructions, and they seemed to work, though I have
not tested the resulting kernel.
Ok, taking it from the top:
I first note that Section 4.5 uses linux-source, which is a different
package which is presumably set up differently. So I guess that section
should be ignored for the purposes of this exercise.
If I understand this correctly, altering the config changes the kernel
ABI. Question: wouldn't patching the kernel also change the ABI?
Therefore it is required to also change the ABI name, otherwise this is
detected by the build process (Question: how does it do this?) which
aborts.
So I set 'abiname: custom1.0' and ran
fakeroot debian/rules debian/control-real
and then
fakeroot debian/rules source
fakeroot make -f debian/rules.gen binary-arch_i386_none_686
BTW, what does
fakeroot debian/rules source
do?
The resulting kernel package looks like
linux-image-2.6.26-custom1.0-686-bigmem_2.6.26-26lenny1_i386.deb.
I get warnings of the form
Compatibility levels before 5 are deprecated.
See extract from build log below. Does this mean it expected the abiname
to start with 5, for some reason?
I've attempted to document this, since it currently does not appear to be.
See patch to kernel handbook below. I'm sure I'm made errors, so
corrections, please.
Regards, Faheem
diff -r 657cba972ce9 chapter-common-tasks.sgml
--- a/chapter-common-tasks.sgml Mon Apr 18 11:54:22 2011 +0530
+++ b/chapter-common-tasks.sgml Tue Apr 19 01:56:33 2011 +0530
@@ -139,6 +139,22 @@
</p>
</sect1>
<sect1>
+ <heading>Modifying the kernel config</heading>
+ <p>
+ When changing the kernel config, it is necessary to also
+ change the ABI. This can be done by changing
+ the <tt>abiname</tt> in
+ <tt>debian/config/defines</tt>. For
+ example, <tt><em>abiname: custom1.0</em></tt>. Then
+ run the command
+ <example>
+ $ fakeroot debian/rules debian/control-real
+ </example>
+ Then follow instructions as explained in previous sub-sections
+ of <ref id="common-official">.
+ </p>
+ </sect1>
+ <sect1>
<heading>Simplified patching and building</heading>
<p>
Starting from version 2.6.32-6, the source package includes
#####################################################################
cd debian/build/build_i386_none_686-bigmem; \
for dir in asm-generic ; do \
ln -s
--target-directory='/usr/local/src/linux-2.6.26/linux-2.6-2.6.26'/debian/linux-headers-2.6.26-custom1.0-686-bigmem//usr/src/linux-headers-2.6.26-custom1.0-686-bigmem/include
../../linux-headers-2.6.26-custom1.0-common/include/$dir; \
done
ln -s ../linux-kbuild-2.6.26/scripts
debian/linux-headers-2.6.26-custom1.0-686-bigmem//usr/src/linux-headers-2.6.26-custom1.0-686-bigmem
mkdir -p
debian/linux-headers-2.6.26-custom1.0-686-bigmem/lib/modules/2.6.26-custom1.0-686-bigmem
ln -s /usr/src/linux-headers-2.6.26-custom1.0-686-bigmem
debian/linux-headers-2.6.26-custom1.0-686-bigmem/lib/modules/2.6.26-custom1.0-686-bigmem/build
make -f debian/rules.real install-base
make[2]: Entering directory `/usr/local/src/linux-2.6.26/linux-2.6-2.6.26'
dh_installchangelogs
dh_installchangelogs: Compatibility levels before 5 are deprecated.
dh_installdocs
dh_installdocs: Compatibility levels before 5 are deprecated.
dh_compress
dh_compress: Compatibility levels before 5 are deprecated.
dh_fixperms
dh_fixperms: Compatibility levels before 5 are deprecated.
dh_installdeb
dh_installdeb: Compatibility levels before 5 are deprecated.
dh_gencontrol --
dh_gencontrol: Compatibility levels before 5 are deprecated.
dh_md5sums
dh_md5sums: Compatibility levels before 5 are deprecated.
dh_builddeb
dh_builddeb: Compatibility levels before 5 are deprecated.
dpkg-deb: building package `linux-headers-2.6.26-custom1.0-686-bigmem' in
`../linux-headers-2.6.26-custom1.0-686-bigmem_2.6.26-26lenny1_i386.deb'.
make[2]: Leaving directory `/usr/local/src/linux-2.6.26/linux-2.6-2.6.26'
make[1]: Leaving directory `/usr/local/src/linux-2.6.26/linux-2.6-2.6.26'
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