Commit Graph

235 Commits

Author SHA1 Message Date
Thomas Petazzoni
205fb19cdb linux: allow specification of a custom Git repository as a source
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-07-11 23:40:49 +02:00
Thomas Petazzoni
b0d446dee4 Improve TARGETS handling for bootloaders and kernel
As the kernel and bootloaders do not use the normal BR2_PACKAGE_*
Kconfig options, their target name was not automatically added to the
global TARGETS variable. Each bootloader .mk and the linux.mk had to
add their own target manually to TARGETS, and the package
infrastructure was making tests on non-existing Kconfig variables.

This commit improves the package infrastructure so that it looks at
BR2_PACKAGE_<pkg> for packages, BR2_TARGET_<pkg> for bootloaders and
at the special BR2_LINUX_KERNEL for the linux package.

This allows to simplify a little bit the bootloaders and linux .mk
files.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-07-11 23:40:23 +02:00
Thomas Petazzoni
9af0ee86b7 linux: convert to the GENTARGETS infrastructure
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-07-11 23:39:17 +02:00
Thomas Petazzoni
af52661d19 linux: rename LINUX26 to LINUX
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-07-11 23:38:58 +02:00
Peter Korsgaard
ce03b89881 linux: simplify modules check
No need to mix make and shell code.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-07-07 23:40:09 +02:00
Thomas Petazzoni
eff25f4cca linux: make it possible to install the kernel in /boot
[Peter: always copy to output/images as requested by Luca]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-07-07 23:16:05 +02:00
Yegor Yefremov
726b15f64a Create menu entry to select device creation method
Four methods for the creation of device files in /dev are now
proposed:

 - static method uses device table as before
 - devtmpfs method enables this feature in kernel
 - mdev method adds mdev starting script to the file system
    and selects mdev itself for installation
 - udev method selects udev for installation

All dynamic methods are based on devtmpfs, so one doesn't need to care
about /dev folder.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-05-09 14:20:03 +02:00
Martin Hicks
e2ed6c8e77 linux: Add support to specify special Kernel Image make target
This is useful for ARCHes like PowerPC that have a whole lot of
special targets for each different board.  The kernel image target
tells make which OpenFirmware machine description file is combined into
the kernel binary.

[Peter: fix long lines]
Signed-Off-By:  Martin Hicks <mort@bork.org>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-04-01 14:53:46 +02:00
Mike Frysinger
871db074b1 initial support for Blackfin processors
[Peter: don't allow MMU on bfin]
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-02-07 14:29:19 +01:00
Martin Hicks
d10e46fb76 Enable ccache for kernel compile
Just needed to pass in ccache as a prefix to the CROSS_TARGET variable.

Signed-off-by: Martin Hicks <mort@bork.org>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-02-01 20:51:15 +01:00
Peter Korsgaard
c1ce30f7f7 linux: fix linux- aliases
The generic linux-% alias conflicts with the linux-fusion package, so
add explicit aliases instead.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-27 22:50:18 +01:00
Thomas Petazzoni
e88704dfba linux: don't force IPv6 configuration in kernel
As per the discussion at
http://lists.busybox.net/pipermail/buildroot/2010-December/040030.html,
remove the bits that forced the IPv6 configuration in the kernel
depending on the toolchain ability to support (or not) IPv6. You may
have a toolchain with IPv6 support but still don't want to have IPv6
in your kernel.

The only parameters we adjust in the kernel configuration are:

 * ARM EABI, since we got a lot of bug reports regarding misconfigured
   kernel compared to the ABI used by userspace applications.

 * initramfs, since its contents are generated by Buildroot itself

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-22 22:19:30 +01:00
Bjørn Forsman
14c1a15fab linux: fix linux-% shortcut targets
linux-% shortcut targets (short for linux26-%) ignores the ouput dir
$(O) so that 'make O=output.arm linux-menuconfig' is actually run in the
default $(O) directory output/ and not in output.arm/. Fix by passing on
$(O) if set.

[Peter: Use EXTRAMAKEARGS]
Signed-off-by: Bjørn Forsman <bjorn.forsman@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-19 21:16:37 +01:00
Bjørn Forsman
bf6fa18f4d linux: support 'make linux26-nconfig'
Signed-off-by: Bjørn Forsman <bjorn.forsman@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-19 21:10:00 +01:00
Thomas Petazzoni
84c4a10a75 linux: add KERNEL_ARCH_PATH to fix x86-specific issue
Both i386 and x86_64 architectures are supported by the arch/x86
directory in the kernel. So, when we copy the kernel configuration
file to arch/$(KERNEL_ARCH)/configs/, it does not work because
arch/i386 and arch/x86_64 do not exist.

So, we introduce KERNEL_ARCH_PATH, which is the path to the
architecture specific directory in the kernel source tree.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-17 17:00:18 +01:00
Thomas Petazzoni
71c05023d7 linux: add support for ELF vmlinux image
The ELF vmlinux image found at the root of the kernel source tree is
the format that Qemu needs when emulating mips(el) or ppc targets, so
add support for it.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-17 16:53:18 +01:00
Thomas Petazzoni
55b0a375ea linux: support a space-separated list of patches
The kernel being a component that often needs a fairly important set
of changes to be adapted to a particular hardware platform, having
maximum flexibility on the patching process is a nice
thing. Therefore, as per the discussions from the Buildroot Developer
Day, we add a mechanism to apply a list of patches (that could come
either from URLs, local files or local directories).

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-16 22:30:18 +01:00
Thomas Petazzoni
fb358f7b38 linux: Import minimal defconfigs as defconfigs
Now that minimal kernel defconfigs are used in Buildroot, the problem
is that copying those minimal configuration files to .config in the
kernel source tree does not work, as kconfig will ask interactively
what should be the value for all unspecified options.

On suggestion on Sam Ravnborg, the easiest way to solve this is to
import the minimal defconfig file as a defconfig inside the kernel
tree (in arch/$(ARCH)/configs) and configure the kernel with it.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-16 22:25:32 +01:00
Mike Frysinger
b7a2358f0b linux: restore DEPMOD usage
The linux.mk rewrite lost the DEPMOD setting while installing modules
which means depending on host-module-init-tools has been useless.
Instead, the build system has been executing /sbin/depmod.

While we're here, drop the INSTALL_MOD_PATH since LINUX26_MAKE_FLAGS
already contains it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-11 22:57:07 +01:00
Mike Frysinger
176afdb3a1 linux: add shorter shortcuts
We only have one Linux kernel package, and "linux26-" is an anachronism
in today's world.  So add useful "linux-%" shortcuts to the "linux26-%".

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-11 02:01:10 +01:00
Mike Frysinger
56d387716a linux: set a few more initramfs opts for newer kernels
Building with linux-2.6.36 and initramfs support causes the build to
pause while it prompts for newer options (uid/gid/compression).  So
have the build system inject the newer options into the linux config
automatically.  Older versions should just ignore these.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-11 01:41:00 +01:00
Mike Frysinger
3bbf1c2ea6 linux: drop LDFLAGS override
The current linux code overrides LDFLAGS that the kernel itself might be
setting up. Looking at the history, there doesn't seem to be any reason
for this override. It was added in ea8b1fa6a6 without any logic.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-12-07 23:01:35 +01:00
Mike Frysinger
f80fdd2a33 linux: update paths to compiled cpio files
Linux has been using "usr/initramfs_data.cpio" for a few releases as the
generated cpio name, so the buildroot match of "...cpio.*" won't actually
clean out the previous result.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-11-17 17:22:51 +01:00
Peter Korsgaard
d0c3d1cf43 sed: get rid of host-sed variant
And all the infrastructure surrounding it. A broken sed implementation
is quite rare nowadays, as seen by the fact that the current host-sed
support has been broken for a while, so just get rid of it.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-09-30 23:09:39 +02:00
Thomas Petazzoni
96652637cc linux: fix uImage location on AVR32
On most architectures, the kernel image can be found in
arch/<ARCH>/boot, but on AVR32, it's in arch/<ARCH>/boot/images.

Issue initially reported by Joachim Pihl
<joachim.pihl@sensordevelopments.com>.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-09-29 00:14:21 +02:00
Thomas Petazzoni
b626dc0791 linux: restrict output image formats to the appropriate arches
Some Linux kernel output image formats are available on some archs,
some not. For example 'uImage' is not supported on MIPS, so let's
prevent the user from making this selection.

Issue initially reported by Choi, David <David.Choi@Micrel.Com>.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-09-29 00:14:21 +02:00
Peter Korsgaard
3e5e39a8a2 barebox/u-boot/linux: don't error out on missing config when make source
As it breaks 'make allyesconfig; make source', used for the source mirror.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-09-28 14:43:25 +02:00
Thomas Petazzoni
ee3f319249 linux: don't force no initramfs
When initramfs was not selected as a root filesystem, we forcefully
disabled the initramfs in the kernel configuration.

However, it prevents an user from manually managing its initramfs, as
we override the option he has set in his kernel configuration
file. There's no real reason to do so: when initramfs is not selected
as the root filesystem, just don't touch initramfs related options in
the kernel configuration.

Problem reported by Sergey Naumov <sknaumov@gmail.com>.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-09-15 21:17:35 +02:00
Thomas Petazzoni
af5dc83da4 linux: more mistake detection
Just as we do for U-Boot, error out in the Linux kernel makefile when
the defconfig name or the configuration file path are not
correct. What prompted me to implement this was a report on IRC from
an user using BR 2010.05 and not understand why the kernel build
process was failing. It was because he just forgot to set the path of
the configuration file.

Of course, it doesn't catch all mistakes (like pointing to a
non-existing defconfig or to a non-existing configuration file), but
it at least catches basic mistakes.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-07-29 22:18:57 +02:00
Peter Korsgaard
c9ff3273eb linux: linux26-{menu,x,g}config needs host-sed
Similar to how it's done for uclibc-menuconfig.

Reported-by: Paul Jones <paul@pauljones.id.au>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-07-20 08:45:45 +02:00
Thomas Petazzoni
f507921d39 linux: add support for initramfs
In Buildroot, the kernel is built and installed *before* the root
filesystems are built. This allows the root filesystem to correctly
contain the kernel modules that have been installed.

However, in the initramfs case, the root filesystem is part of the
kernel. Therefore, the kernel should be built *after* the root
filesystem (which, in the initramfs case simply builds a text file
listing all files/directories/devices/symlinks that should be part of
the initramfs). However, this isn't possible as the initramfs text
file would lack all kernel modules.

So, the solution choosen here is to keep the normal order: kernel is
built before the root filesystem is generated, and to add a little
quirk to retrigger a kernel compilation after the root filesystem
generation.

To do so, we add a ROOTFS_$(FSTYPE)_POST_TARGETS variable to the
fs/common.mk infrastructure. This allows individual filesystems to set
a target name that we should depend on *after* generating the root
filesystem itself (contrary to normal ROOTFS_$(FSTYPE)_DEPENDENCIES,
on which we depend *before* generating the root filesystem).

The initramfs code in fs/initramfs/initramfs.mk uses this to add a
dependency on 'linux26-rebuild-with-initramfs'.

In linux/linux.mk, we do various things :

 * If BR2_TARGET_ROOTFS_INITRAMFS is enabled (i.e if initramfs is
   enabled as a root filesystem type), then we create an empty
   rootfs.initramfs file (remember that at this point, the root
   filesystem hasn't been generated) and we adjust the kernel
   configuration to include an initramfs. Of course, in the initial
   kernel build, this initramfs will be empty.

 * In the linux26-rebuild-with-initramfs target, we retrigger a
   compilation of the kernel image, after removing the initramfs in
   the kernel sources to make sure it gets properly rebuilt (we've
   experienced cases were modifying the rootfs.initramfs file wouldn't
   retrigger the generation of the initramfs at the kernel level).

This is fairly quirky, but initramfs really is a special case, so in
one way or another, we need a little quirk to solve its specialness.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-22 21:20:28 +02:00
Thomas Petazzoni
4944e8c883 linux: add support for linux26-{menuconfig,xconfig,gconfig} targets
These targets allow the user to customize the configuration of the
Linux kernel. After changing the kernel configuration, the next time
the user runs "make", the kernel is rebuilt to take into account the
new configuration (not rebuilt from scratch).

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-22 21:20:27 +02:00
Thomas Petazzoni
100c09a53b linux: adjust kernel config according to the Buildroot configuration
We only adjust the configuration or ARM EABI and IPv6. The (more
complicated) initramfs case is handled in a separate commit. The user
is expected to take care of all other configuration details (like
having Netfilter enabled to make iptables work, etc.)

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-22 21:20:27 +02:00
Thomas Petazzoni
dc4d5647a5 linux: Add dependency on host-module-init-tools
In order to not depend on module init tools being installed on the
development environment of the Buildroot user, let's build module init
tools for the host.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-22 21:20:27 +02:00
Thomas Petazzoni
487e21cff6 New, simpler, infrastructure for building the Linux kernel
This patch introduces a single, simple, infrastructure to build the
Linux kernel. The configuration is limited to :

 * Kernel version: a fixed recent stable version, same as kernel
   headers version (for internal toolchains only), custom stable
   version, or custom tarball URL

 * Kernel patch: either a local file, directory or an URL

 * Kernel configuration: either the name of a defconfig or the
   location of a custom configuration file

 * Kernel image: either uImage, bzImage, zImage or vmlinux.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-22 21:20:25 +02:00