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>
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>
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>
The KCONFIG_ENABLE_OPT, KCONFIG_SET_OPT and KCONFIG_DISABLE_OPT are
new make functions to respectively enable, set and disable options in
Kconfig-like files (as used by the kernel, uClibc or Busybox).
They can be used as follows :
$(call KCONFIG_ENABLE_OPT,CONFIG_FOOBAR,/path/to/.config)
$(call KCONFIG_SET_OPT,CONFIG_BARFOO,foobar,/path/to/.config)
$(call KCONFIG_DISABLE_OPT,CONFIG_FARBOO,/path/to/.config)
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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>
The "remove-index" patch is no longer needed, the newer version of
module-init-tools correctly uses strchr().
The "module-init-tools" patch, whose main purpose was to disable the
generation of man pages (it requires docbook2man), is replaced by a
simpler implementation,
module-init-tools-3.11-add-manpages-config-option.patch.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The new infrastructure to build the Linux kernel doesn't use a
cross-depmod. This isn't needed with modern module-init-tools that
most distros include perfectly handle this.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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>
The buildroot/busybox/uClibc VM is running low on disk space, and we've
been asked to move the source mirrors off-site.
A redirect has been setup between the old buildroot.net/downloads/sources/
and sources.buildroot.net, so old .configs continue to work, but we might
as well use the official one now.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Make sure we only pass O=<path> if we were originally called like that,
otherwise we might end up looking for the .config in the wrong place.
Likewise, when changing between using O= or not (or simply running
make <blah>_defconfig in a pristine source tree), we do end up having
a .config, but no .config.cmd. It isn't really critical so just continue
even if we couldn't read it.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The ntfsprogs configure script would add hardcoded host dirs to the
pkg-config search path, confusing configure if libraries were installed
on the host and not on the target.
At the same time, ensure that fuse is build before ntfsprogs (if enabled),
so the fuse support gets built.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The ntfsprogs crypto support requires libgnutls, which we don't have
in BR, and the autodetection in configure gets confused when the host
has a libcrypt-config.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
squashfs used the get_nprocs() GNU extension, instead of directly
calling sysconf(), breaking the build on uClibc.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The libart package had a couple of typos so it never really installed to
staging. So fix it.
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Change the default target optimisation value so
it does not conflict with gcc optimization level
Signed-off-by: Paul Jones <paul@pauljones.id.au>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Add the option to customize the list of decoders, encoders, muxers, demuxers,
parsers, protocols, bsfs and filters to be built into ffmpeg, and to compile or
exclude input and output devices.
[Peter: fix qstrip invocation]
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
[Peter: configure doesn't support --disable-nls / --disable-largefile,
needs largefile support in toolchain]
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
From busybox git.
Devmem used to always map 2 pages in case the access would cross a page
boundary, which fails if you try to access the highest page.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Closes#2035
- Remove -Werror from CFLAGS
- Always enable ipv6 support if available in toolchain
- Always install into staging
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
After the rework of the U-Boot configuration/compilation process, we
need to slightly rework how target/linux/Makefile.in.advanced depends
on mkimage on the host to produce an uImage.
target/linux/Makefile.in doesn't need to be fixed as it just doesn't
handle this dependency for the moment.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The first patch allows to build with an EABI toolchain. The second
patch disables the install step of at91dataflashboot Makefile since it
tries to copy files to /tftpboot.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Fix the URL, fix the directory to which it gets unpacked, fix make
target names to be lower-case only.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
