Hello!
I'm trying to build a 2.6.39 low latency kernel using make-kpkg on
lucid. The current state of kernel-package makes this a bit painful,
here are my experiences.
The first problem is that initrd is not created when the linux-image
package is installed. This can be solved by having kernel-package
include different maintainer scripts into the packages it builds, e.g.
copy the scripts from the stock 2.6.32-generic kernel package (as
described in https://help.ubuntu.com/community/Kernel/Compile).
This leads straight to the second problem: The symlink in
/lib/modules/<uname>/build is broken and does not get corrected by the
maintainer scripts copied from 2.6.32. This breaks stuff like dkms. I
solved this second problem by copying the missing code from the
original kernel-packages postinst into the postinst script copied from
2.6.32 (patch attached).
Did I miss some switch in kernel-package which makes the above
problems resolve itself? Or is there a new way to build custom kernel
packages without too much hassle?
Christoph
--- linux-2.6.32-generic/linux-2.6.32/debian/control-scripts/postinst 2011-06-21 11:07:45.000000000 +0200
+++ kernel-package/pkg/image/postinst 2011-06-22 10:46:17.864393049 +0200
@@ -32,12 +32,16 @@
my $prerm_hook = ''; #Normally we do not
my $minimal_swap = ''; # Do not swap symlinks
my $ignore_depmod_err = ''; # normally we do not
+my $relink_src_link = 'YES'; # There is no harm in checking the link
+my $relink_build_link = 'YES'; # There is no harm in checking the link
+my $force_build_link = ''; # There is no harm in checking the link
my $kernel_arch = "=B";
my $ramdisk = "/usr/sbin/update-initramfs"; # List of tools to create initial ram fs.
my $notifier = "/usr/share/update-notifier/notify-reboot-required";
my $package_name = "linux-image-$version";
my $explicit_do_loader = 'Yes';
+
my $Loader = "NoLOADER"; #
$Loader = "LILO" if $loader =~ /^lilo/io;
$Loader = "SILO" if $loader =~ /^silo/io;
@@ -129,6 +133,9 @@
$warn_reboot = 'Yes' if /^\s*warn_reboot\s*=\s*(yes|true|1)\s*$/ig;
$minimal_swap = 'Yes' if /^\s*minimal_swap\s*=\s*(yes|true|1)\s*$/ig;
$ignore_depmod_err = 'Yes' if /^\s*ignore_depmod_err\s*=\s*(yes|true|1)\s*$/ig;
+ $relink_src_link = '' if /relink_src_link\s*=\s*(no|false|0)\s*$/ig;
+ $relink_build_link = '' if /relink_build_link\s*=\s*(no|false|0)\s*$/ig;
+ $force_build_link = '' if /force_build_link\s*=\s*(no|false|0)\s*$/ig;
$image_dest = "$1" if /^\s*image_dest\s*=\s*(\S+)/ig;
$postinst_hook = "$1" if /^\s*postinst_hook\s*=\s*(\S+)/ig;
@@ -190,6 +197,88 @@
. "$kimage-$version)\n" unless -e $realimageloc
. "$kimage-$version";
+
+######################################################################
+## Fix the build link
+######################################################################
+sub fix_build_link {
+ return unless -d "$modules_base/$version";
+ # if we saved a build link in preinst, restore the link
+ if (! -e "$modules_base/$version/build" &&
+ -l "$modules_base/$version/build.save" ) {
+ rename("$modules_base/$version/build.save", "$modules_base/$version/build") ||
+ die "failed to move $modules_base/$version/build:$!";
+ }
+ if ($relink_build_link || $force_build_link) {
+ my $build_target;
+ my $real_target = '';
+ if (-l "$modules_base/$version/build") {
+ $build_target = readlink "$modules_base/$version/build";
+ } else {
+ return;
+ }
+ # Determine what the real file name is, and test that for existence
+ $real_target = abs_path($build_target) if defined($build_target);
+ if (!defined($build_target) || ! -d "$real_target") { # Danglink link
+ warn qq(
+ Hmm. There is a symbolic link $modules_base/$version/build
+ However, I can not read it: $!
+ Therefore, I am deleting $modules_base/$version/build\n
+);
+ my $num = unlink "$modules_base/$version/build";
+ if ($num != 1) {
+ warn "error unlinking $modules_base/$version/build";
+ } else {
+ if ($force_build_link || -d "/usr/src/=ST-headers-$version") {
+ my $result = symlink ("/usr/src/=ST-headers-$version",
+ "$modules_base/$version/build");
+ if (! $result) {
+ warn "Could not link /usr/src/=ST-headers-$version to $modules_base/$version/build:$!"
+ }
+ }
+ }
+ }
+ }
+}
+
+if ($relink_build_link || $force_build_link) {
+ &fix_build_link();
+}
+######################################################################
+## Fix the source link
+######################################################################
+sub fix_source_link {
+ return unless -d "$modules_base/$version";
+ if ($relink_src_link) {
+ my $source_target;
+ my $real_target = '';
+
+ if (-l "$modules_base/$version/source") {
+ $source_target = readlink "$modules_base/$version/source";
+ } else {
+ return;
+ }
+ # Determine what the real file name is, and test that for existence
+ $real_target = abs_path($source_target) if defined($source_target);
+ if (!defined($source_target) || ! -d "$real_target") { # Danglink link
+ warn qq(
+ Hmm. The package shipped with a symbolic link $modules_base/$version/source
+ However, I can not read the target: $!
+ Therefore, I am deleting $modules_base/$version/source\n
+);
+ my $num = unlink "$modules_base/$version/source";
+ if ($num != 1) {
+ warn "error unlinking $modules_base/$version/source";
+ }
+ }
+ }
+}
+
+if ($relink_src_link) {
+ &fix_source_link();
+}
+
+
# search for the boot loader in the path
my $loader_exec;
($loader_exec = $loader) =~ s|.*/||;
--
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