We don't have a hash for any linux version. We currently also don't
have a hash for the latest version, but if we ever add a hash, it
will only be for the latest version.
This simplifies the code a little because soon we will add hash checks
for git as well, so we also need an exclusion in that case. It's much
easier to always exclude except in the single case where we do have a
hash.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
In 4c10eedc1 (systemd: enable required kernel features), we added
setting a few required kernel features to ensure systemd works.
However, there was a typo for one of the variables: CONFIG_TMPFS_XATTR
was written as CONFIG_TMPFS_POSIX_XATTR, which does not exist (and never
ever existed, at least not since 2.6.12)...
Reported-by: Michael Heinemann <posted@heine.so>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Cc: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Cc: Michael Heinemann <posted@heine.so>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
A long time ago, the blind config option BR2_LINUX_KERNEL_UBOOT_IMAGE
was introduced to be able to trigger the linux -> host-uboot-tools
dependency. Back in those days, there was no user-configurable
BR2_PACKAGE_HOST_UBOOT_TOOLS.
Now, however, it is possible to select a custom kernel image name that
needs uboot-tools, and manually enable BR2_PACKAGE_HOST_UBOOT_TOOLS. In
this case, however, the linux -> host-uboot-tools is missed and the
build is not reproducible. An example of such a situation is the
upcoming CI40 defconfig.
As a solution, remove BR2_LINUX_KERNEL_UBOOT_IMAGE entirely. Instead,
just select BR2_PACKAGE_HOST_UBOOT_TOOLS and add the dependency if it
is selected.
Note that this may introduce a redundant dependency in case the user
selected BR2_PACKAGE_HOST_UBOOT_TOOLS for some other reason (e.g. to
be able to generate a U-Boot environment to include in the image, while
the kernel is built as a zImage). However, the redundant dependency
shouldn't hurt much.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Cc: Abhimanyu Vishwakarma <abhimanyu.v@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This patch adds an easy way to select the CIP project SLTS
kernel within the kernel menu.
Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
[Thomas: remove BR2_CIP_KERNEL_REPO_URL option.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
We want to use SPDX identifier for license strings as much as possible.
SPDX short identifier for GPLv2/GPLv2+ is GPL-2.0/GPL-2.0+.
This change is done by using following command.
find . -name "*.mk" | xargs sed -ri '/LICENSE( )?[\+:]?=/s/\<GPLv2\>/GPL-2.0/g'
Signed-off-by: Rahul Bedarkar <rahulbedarkar89@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Whitespaces were searched using the following regex:
[ ]{1,}\t
and then manually removed in most of the cases. For
xserver_xorg-server.mk, tabs before backslashes were removed.
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Starting with the release 2016.09 xtensa architecture is supported by
the U-Boot. Enable uimage target in xtensa linux kernel.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Fix commit 400eaa3452 ("linux: bump
default to version 4.10") in which a conflict was not correctly
resolved.
Reported-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The option `BR2_LINUX_KERNEL_CUSTOM_LOCAL` no longer exists (see commit
e782cd5b1b [1]); removing the option. Note
that this legacy option has already been handled (Config.in.legacy) in
the mentioned commit.
Signed-off-by: James Knight <james.knight@rockwellcollins.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
If not set the system will use an empty string which will result in
download errors for 'linux-.tar.gz' packages.
This patch makes it obvious to the user that the variable needs to be
set.
Signed-off-by: Christian Kellermann <christian.kellermann@solectrix.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Fix kernel reproducible build if a non-C locale is used on the host
system.
When building the Linux kernel, scripts/gen_initramfs_list.sh does 'date
-d"$KBUILD_BUILD_TIMESTAMP" +%s'. In linux.mk, Buildroot sets
KBUILD_BUILD_TIMESTAMP to "$(shell date -d @$(SOURCE_DATE_EPOCH))".
For example, if LANG=fr_FR.UTF-8 is defined in the host system, it does
not work:
- LC_ALL=C date -d"$(LC_ALL=C date)" : ok
- LC_ALL=C date -d"$(LC_ALL=fr_FR.UTF-8 date)" : error
LANG/LC_ALL variables exported in the main Makefiles are not passed in
the $(shell ...) sub-shells.
Signed-off-by: Jean-Baptiste Trédez <jean-baptiste.tredez@basystemes.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Linux kernel include a few information about build environment in its binary.
This feature is incompatible with BR2_REPRODUCIBLE. This patch overload build
information when BR2_REPRODUCIBLE is enabled.
Note that usage of KBUILD_BUILD_TIMESTAMP is not mandatory since Buildroot
use `fakedate'. However, native solution is prefered when upstream
provide one.
Signed-off-by: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This adds an ev3dev Linux drivers extension that provides Linux kernel
drivers for LEGO MINDSTORMS EV3 from the ev3dev project.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The kernel source tree also contains the sources for various userland
tools, of which cpupower, perf or selftests.
Currently, we have support for building those tools as part of the
kernel build procedure. This looked the correct thing to do so far,
because, well, they *are* part of the kernel source tree and some
really have to be the same version as the kernel that will run.
However, this is causing quite a non-trivial-to-break circular
dependency in some configurations. For example, this defconfig fails to
build (similar to the one reported by Paul):
BR2_arm=y
BR2_cortex_a7=y
BR2_ARM_FPU_NEON_VFPV4=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_INIT_SYSTEMD=y
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_GIT=y
BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/raspberrypi/linux.git"
BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="26f3b72a9c049be10e6af196252283e1f6ab9d1f"
BR2_LINUX_KERNEL_DEFCONFIG="bcm2709"
BR2_PACKAGE_LINUX_TOOLS_CPUPOWER=y
BR2_PACKAGE_CRYPTODEV=y
BR2_PACKAGE_OPENSSL=y
BR2_PACKAGE_LIBCURL=y
This causes a circular dependency, as explained by Thomas:
- When libcurl is enabled, systemd depends on it
- When OpenSSL is enabled, obviously, will use it for SSL support
- When cryptodev-linux is enabled, OpenSSL will depend on it to use
crypto accelerators supported in the kernel via cryptodev-linux.
- cryptodev-linux being a kernel module, it depends on linux
- linux by itself (the kernel) does not depend on pciutils, but the
linux tool "cpupower" (managed in linux-tool-cpupower) depends on
pciutils
- pciutils depends on udev when available
- udev is provided by systemd.
And indeed, during the build, we can see that make warns (it's only
reported as a *warning*, not as an actual error):
[...]
make[1]: Circular /home/ymorin/dev/buildroot/O/build/openssl-1.0.2h/.stamp_configured
<- cryptodev-linux dependency dropped.
>>> openssl 1.0.2h Downloading
[...]
So the build fails later on, when openssl is actually built:
eng_cryptodev.c:57:31: fatal error: crypto/cryptodev.h: No such file or directory
compilation terminated.
<builtin>: recipe for target 'eng_cryptodev.o' failed
Furthermore, graph-depends also detects the circular dependency, but
treats it as a hard-error:
Recursion detected for : cryptodev-linux
which is a dependency of: openssl
which is a dependency of: libcurl
which is a dependency of: systemd
which is a dependency of: udev
which is a dependency of: pciutils
which is a dependency of: linux
which is a dependency of: cryptodev-linux
Makefile:738: recipe for target 'graph-depends' failed
Of course, there is no way to break the loop without losing
functionality in either one of the involved packages *and* keep
our infrastructure and packages as-is.
The only solution is to break the loop at the linux-tools level, by
moving them away into their own package, so that the linux package will
no longer have the opportunity to depend on another package via a
dependency of one the tools.
All three linux tools are thus moved away to their own package.
The package infrastructure only knows of three types of packages: those
in package/ , in boot/ , in toolchain/ and the one in linux/ . So we
create that new linux-tools package in package/ so that we don't have to
fiddle with yet another special case in the infra. Still, we want its
configure options to appear in the kernel's sub-menu.
So, we make it a prompt-less package, with only the tools visible as
options of that package, but without the usual dependency on their
master symbol; they only depend on the Linux kernel.
Furthermore, because the kernel is such a huge pile of code, we would
not be very happy to extract it a second time just for the sake of a few
tools. We can't extract only the tools/ sub-directory from the kernel
source either, because some tools have hard-coded path to includes from
the kernel (arch and stuff).
Instead, we just use the linux source tree as our own build tree, and
ensure the linux tree is extracted and patched before linux-tools is
configured and built.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Paul Ashford <paul.ashford@zurria.co.uk>
[Thomas:
- fix typo #(@D) -> $(@D)
- fix the inclusion of the per-tool .mk files.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Christian Stewart <christian@paral.in>
[Atul:
- Removed the duplicate conditional block.
- Updated the license to GPLv2.
- Removed the visibilty of package from menuconfig.
- Removed dependencies.
- Removed the comment.
- Changed the name of variable from BR2_PACKAGE_AUFS_STANDALONE_VERSION
to BR2_LINUX_KERNEL_EXT_AUFS_VERSION.
- Removed the AUFS_INSTALL_STAGING and AUFS_INSTALL_TARGET variables.
- Removed the BR2_PACKAGE_AUFS_3X and BR2_PACKAGE_AUFS_4X variables.]
Signed-off-by: Atul Singh <atul.singh.mandla@rockwellcollins.com>
[yann.morin.1998@free.fr:
- do not fail on version check if aufs ext is disabled
- check for empty version
- squash aufs package and linux extension in one patch
- fail if the kernel already has aufs support
- simplify handling of version]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
[Thomas:
- Fix the apply patch logic, it was using a non-existent
AUFS_VERSION_MAJOR variable. BR2_PACKAGE_AUFS_SERIES is used
instead.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
We used to do a special handling of Linux kernel modules when stripping
target binaries because there's some special precious data in modules
that we must keep for them to properly operate. This is for example true
for stack unwinding data etc.
It turned out there're cases when our existing "strip --strip-unneeded"
doesn't work well. For example this removes .debug_frame section used by
Linux on ARC for stack unwinding, refer to [1] and [2] for more details.
Now Linux kernel may strip modules as a part of "modules_install" target
if INSTALL_MOD_STRIP=1 is passed in command line. And so we'll do
allowing kernel decide how to strip modules in the best way.
Still note as of today Linux kernel strips modules uniformly for all
arches with "strip" command, so this commit alone doesn't solve
mentioned problem but it opens a possibility to add later a patch to the
kernel which will strip modules for ARC differently - and that's our
plan for mainline kernel.
[1] https://github.com/foss-for-synopsys-dwc-arc-processors/toolchain/issues/86
[2] http://lists.busybox.net/pipermail/buildroot/2016-September/172161.html
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Daniel Mentz <danielmentz@google.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Properly propagate the Xenomai dependencies to the corresponding kernel
extension, to fix the following unmet dependencies:
warning: (BR2_LINUX_KERNEL_EXT_XENOMAI) selects BR2_PACKAGE_XENOMAI
which has unmet direct dependencies (BR2_PACKAGE_XENOMAI_ARCH_SUPPORTS
&& BR2_TOOLCHAIN_HAS_THREADS && !BR2_TOOLCHAIN_USES_MUSL)
While at it, move the comment lower, after the path option, so that the
path option is properly indented in the menuconfig.
Add markers to separate each extension.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
It's been deprecated for quite some time now.
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This reverts commit 73da2ff6f7.
The reason for adding support for a local location was to be able to do
development on the Linux kernel source tree on a local directory rather
than have to clone it for every build.
We already have a mechanism for that, it's called override-srcdir. It's
been available since September 2011, more than a year before this patch
was committed.
Otherwise, we're going to be adding support for local sources in other
packages. First was U-Boot as submitted by Adam. But what next? We can't
have such support for all packages, especially since override-srcdir
does the job.
Besides, using a local source tree makes the build non-reproducible, so
we don't really want to have this in a .config (or defconfig).
We only handle the boolean option in legacy, as there is nothing we can
do with the directory path.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Rafal Fabich <rafal.fabich@gmail.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
The cpupower linux tool needs gettext, always (even without locales).
We need to disable NLS, otherwise it tries to compile the .po files.
We also need to pass -lintl, otherwise it forgets to link with it
(because, the world is glibc-only, you did not know? And glibc does not
need we link with -lintl, so why would we? Oh, yes, we also reinvented
our super intelligent one-off Makefile rather than use one of the
standard buildsystems).
Fixes#9181:
CC utils/helpers/sysfs.o
In file included from utils/helpers/amd.c:9:0: ./utils/helpers/helpers.h:13:21: fatal error: libintl.h: No such file or directory
#include <libintl.h>
^
Without NLS=false (yes, we could depend on host-gettext):
MSGFMT po/de.gmo
make[3]: msgfmt: Command not found
Without LDFLAGS=-lintl:
CC cpupower
./utils/cpupower.o: In function `main':
cpupower.c:(.text.startup+0x1a4): undefined reference to `libintl_textdomain'
./utils/idle_monitor/cpupower-monitor.o: In function `list_monitors':
cpupower-monitor.c:(.text+0x5dc): undefined reference to `libintl_gettext'
./utils/cpupower-set.o: In function `cmd_set':
cpupower-set.c:(.text+0x38): undefined reference to `libintl_textdomain'
./utils/cpupower-info.o: In function `cmd_info':
cpupower-info.c:(.text+0x20): undefined reference to `libintl_textdomain'
collect2: error: ld returned 1 exit status
Reported-by: Joergen Pihlflyckt <Jorgen.Pihlflyckt@ajeco.fi>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Joergen Pihlflyckt <Jorgen.Pihlflyckt@ajeco.fi>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To configure the Linux kernel, we currently provide two options:
1. Passing a defconfig name (for example "multi_v7"), to which we append
"_defconfig" to run "make multi_v7_defconfig".
2. Passing a path to a custom configuration file.
Unfortunately, those two possibilities do not allow to configure the
kernel when you want to use the default configuration built into the
kernel for a given architecture. For example, on ARM64, there is a
single defconfig simply called "defconfig", which you can load by
running "make defconfig".
Using the mechanism (1) above doesn't work because we append
"_defconfig" automatically.
One solution would be to change (1) and require the user to enter the
full defconfig named (i.e "multi_v7_defconfig" instead of "multi_v7"),
but we would break all existing Buildroot configurations.
So instead, we add a third option, which simply tells Buildroot to use
the default configuration for the selected architecture. In this case,
Buildroot will configure the kernel by running "make defconfig".
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The endianess of the Linux kernel should be based on BR2_ENDIAN, so that
it is automatically built for the right endianness.
Signed-off-by: Ofer Heifetz <oferh@marvell.com>
[Thomas: tweak commit message, add comment in .mk file.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
[Thomas: don't use the helper.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Commit ab74e09eb4 renamed the dtc host tool
provided by linux to linux-dtc to avoid clashes with the dtc host tool
provided by host-dtc.
However, external scripting may well rely on the existence of a device tree
compiler as $(HOST_DIR)/usr/bin/dtc, regardless of its source. Changing
these external scripts to use linux-dtc means that the scripts need to be
aware of the buildroot release they are working with, which is not very
nice.
Add a symlink dtc->linux-dtc when no $(HOST_DIR)/usr/bin/dtc is present.
When host-dtc is not enabled, the end result will be dtc and
linux-dtc representing the same thing.
When host-dtc is enabled, either it is build before linux and no symlink
is created at any time, or it is build after linux, and the 'install'
command in host-dtc will overwrite the symlink with a proper dtc. In both
cases, the end result will be dtc and linux-dtc representing a different
thing.
Cc: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The target "$(LINUX_DIR)/.stamp_initramfs_rebuilt" uses its own
'cp' command, instead of LINUX_INSTALL_IMAGE/LINUX_INSTALL_IMAGES_CMDS
provided by (or updated with) commit 055e6162bb ("linux: don't build
appended DTB image in place and support multiple images") and thus is
not operating properly when APPENDED_DTB is used.
Indeed, it copies a single image, and does not copy the one with the DTB
appended.
This patch replaces the 'cp' command with LINUX_INSTALL_IMAGE which
handles APPENDED_DTB.
Fixes: 055e6162bb ("linux: don't build appended DTB image in place and
support multiple images")
Signed-off-by: Sebastian Frias <sf84@laposte.net>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
When setting BR2_LINUX_KERNEL_LATEST_VERSION, it is hard for the user to
know that this version is subject to change in the future.
Explicit this in the Kconfig entry text.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Since quite some time, the kernel and bootloader communities consider
zImage as the default format for kernel images on ARM, replacing
uImage. The load address information in uImage is no longer needed,
since the kernel is position-independent in terms of physical address,
except on a few old platforms. For most people, using zImage is simply
better/simpler, so let's switch to zImage as the default image format
on ARM.
All defconfigs are updated: 46 defconfigs no longer need to select
explicitly zImage because it's the default, and 16 defconfigs now need
to explicitly select uImage because that's no longer the default.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Matt Weber <matt@thewebers.ws>
Acked-by: Julien Boibessot <julien.boibessot@armadeus.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This patch adds the ability to compile and install the kernel
selftests into the target at /usr/lib/kselftests. The rationale behind
/usr/lib is that the selftests have subdirectories where they are
installed which makes them unsuitable to be placed in /usr/sbin as
this would result in /usr/sbin/kselftests/x/y/z. While the selftests
aren't libraries either, they don't achieve much as a standalone
binary so they can be considered to be a 'library of tests' making
/usr/lib sensible.
The selftests require that the kernel headers be installed into the
kernel build tree as some of the selftests have a hardcoded CFLAGS to
include kernel headers (CFLAGS += -I../../../../usr/include/). This is
most easily achieved by using the make ... headers_install inside the
kernel build dir.
This is likely to be a rarely used debugging/performance feature for
development and unlikely to be used in a production configuration.
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
[Thomas:
- remove bash as a build dependency, it is only a runtime dependency.
- fix typo in the Config.in help text, and rewrap
- add missing 'depends on BR2_USE_MMU' dependency for the comment.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Forcefully disable the features that have optional dependencies that are
not enabled in Buildroot.
Disable support for bionic since, well, we're not Android.
Slightly re-order the variables to have semantically-related variables
together, with features last.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
perf does not honour the -j flags we pass to make; it yet again tries to
reinvent the wheel and by default uses the number of CPUs as the number
of parallel jobs.
Fortunately, in their infinite wisdom, the insane developpers of the
perf buildsystem were kind enough to provide us with a variable we can
set to specify the number of parallel jobs.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The perf buildsystem, inside the kernel, is not really amenable to be
easily used...
Regarding the documentation, it will forcefully try to detect asciidoc
and, with the latest versions, xmlto, completely disregarding what the
user may provide.
We currently pass ASCIIDOC= (the empty string) on the make command line,
as an attempt to disable building the documentation, but that has no
effect whatsoever on perf: that variable is not passed down to the
sub-sub-make (yes, a two-level depth) that is responsible for building
the documentation.
We really do not want to build any of the documentation (the user can
refer to the documentation on his own development machine), so we use a
little dirty trick: we provide a GNUmakefile beside the existing
Makefile for the documentation; GNUmakefile always takes precedence over
a Makefile when both are present. We only provide a catch-all-no-recipe
rule in that GNUmakefile, so it really does nothing useful, except avoid
building the documentation.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
We need to pass an argument to ld for setting the endianness when
building it for MIPS architecture, otherwise the default one will always
be used (which is big endian) and the compilation for little endian will
always fail showing an error like this one:
LD foo.o
mips-linux-gnu-ld: foo.o: compiled for a little endian system and target
is big endian
Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
