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* kernel: fix rootfs initramfs not updating on subsequent single buildChristian Marangi2025-01-20
| | | | | | | | | | | | | | | | | There is currently a problem where the rootfs in an initramfs image for single target build is not updated on subsequent run. This is caused by a bug introduced in d78dec3e19e3 ("kernel: copy kernel build dir on Per-Device Initramfs compilation") where the initramfs_data.cpio rm was moved to PrepareConfigPerRootfs. This caused the side effect of dropping the rm call for single target build making the kernel reusing the previous generated initramfs_data.cpio. To correctly handle this, restore the original location of this call right after the touch /init call. This way the kernel will always regenerate the initramfs embedded rootfs ALSO for single target build. Fixes: d78dec3e19e3 ("kernel: copy kernel build dir on Per-Device Initramfs compilation") Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: rework Initramfs compile cpio handlingChristian Marangi2024-09-19
| | | | | | | | | | | | | | | | Now that we copy and then delete the Per-Device rootfs linux directory, it's not valid anymore placing the generated cpio there as artifacts or subsequent commands need the generated cpio. To handle this, rework Initramfs compile cpio handling by placing them in the KERNEL_BUILD_DIR but add to the name the rootfs HASH ID. To also prevent race condition, generate and access these file under a lock to prevent fit command to reference a cpio while a parallel execution is genereting it. Fixes: 52cc9d82f113 ("kernel: rework Initramfs locking logic") Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: fix flock name for gen-initramfs lockChristian Marangi2024-09-19
| | | | | | | | | | Fix flock name for gen-initramfs lock as $(2) starts with .HASH making the lock name gen-initramfs-.HASH.flock Fix this to a better name of gen-initramfs.HASH.flock Fixes: 52cc9d82f113 ("kernel: rework Initramfs locking logic") Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: fix wrong rework for Initramfs cpio xz compressionChristian Marangi2024-09-19
| | | | | | | | Fix wrong rework for Initramfs cpio xz compression where it was wrongly dropped the Per-Device linux directory if condition. Fixes: 52cc9d82f113 ("kernel: rework Initramfs locking logic") Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: copy kernel build dir on Per-Device Initramfs compilationChristian Marangi2024-09-17
| | | | | | | | | | | | | | To speedup compilation of Per-Device Initramfs, copy the kernel build directory for each rootfs ID. This permits concurrent execution of kernel build without conflicting with each other at the expense of additional disk space usage. To limit disk space usage, the copied kernel directory is deleted after the Per-Device Initramfs image is generated and saved. Link: https://github.com/openwrt/openwrt/pull/16404 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: rework Initramfs locking logicChristian Marangi2024-09-17
| | | | | | | | | | | | | | | | | Rework CompileImage/Initramfs locking logic to fix race condition on concurrent access/compilation. Rework each intermediate step and group them under one single execution block. Protect this with a new lock, 'gen-initramfs' and rename the compile initramfs to compile-initramfs lock name. This is done to handle corner case scenario where a rootfs with the same hash ID is generated at the same time. To handle this, we execute everything under lock and use a specific hash ID lock to prevent concurrent access/compilation. Link: https://github.com/openwrt/openwrt/pull/16404 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: fix broken initramfs images for Separate cpioChristian Marangi2024-07-09
| | | | | | | | | | | | | | | | | Commit 0137fbd74bff ("kernel: skip rebuilding kernel with ROOTFS_INITRAMFS_SEPARATE") had a logic error error and didn't account that the generic initramfs is still needed to be built to enable support for the cpio compression and other config specific to initramfs. With that commit we completely skip rebuilding the kernel with those new options. To better handle this, skip kernel build ONLY when we are handling Per Device Rootfs, permitting the first generic build to be actually called with the new options. Fixes: 0137fbd74bff ("kernel: skip rebuilding kernel with ROOTFS_INITRAMFS_SEPARATE") Link: https://github.com/openwrt/openwrt/pull/15912 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: aldo fix CopyImage for Separate InitramfsChristian Marangi2024-07-08
| | | | | | | Also fix CopyImage for Separate Initramfs with Per Device Rootfs. Fixes: 7bffb3f72bbf ("kernel: fix CopyImage function with Per Device Rootfs") Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: fix CopyImage function with Per Device RootfsChristian Marangi2024-07-07
| | | | | | | | | | | | | | | Some target define custom kernel images with KERNEL_INITRAMFS_NAME to reference .elf variant of vmlinux. With Per Device Rootfs, the expected format is image.suffix.extension.ROOTFS_ID, while in CopyImage we are currently generating images with image.suffix.ROOTFS_ID.extension making some target failing. Fix CopyImage function to correctly follow the expected pattern. Fixes: 97fd059e7e6a ("image: respect TARGET_PER_DEVICE_ROOTFS for initramfs") Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: skip rebuilding kernel with ROOTFS_INITRAMFS_SEPARATEChristian Marangi2024-07-06
| | | | | | | | | | With PER_DEVICE_ROOTFS, rebuilding kernel is needed to embed the cpio image in the kernel image. With ROOTFS_INITRAMFS_SEPARATE, the cpio image is external hence we can reuse the same kernel image without rebuilding it. Link: https://github.com/openwrt/openwrt/pull/12959 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* image: respect TARGET_PER_DEVICE_ROOTFS for initramfs fit commandChristian Marangi2024-07-06
| | | | | | | | | | | | | Fit command makes use of CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE as the cpio is provided externally and is not embedded in the kernel image. As done with embedded cpio, also handle PER_DEVICE_ROOTFS by generating a cpio for each rootfs and reference them by the ROOTFS_ID generated previously. The generated cpio are placed in the linux directory + the package ID. Link: https://github.com/openwrt/openwrt/pull/12959 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* image: respect TARGET_PER_DEVICE_ROOTFS for initramfsLuiz Angelo Daros de Luca2024-07-06
| | | | | | | | | | | | | | | | | | | | | | Initramfs images were using a common rootfs (TARGET_DIR) for all devices, ignoring TARGET_PER_DEVICE_ROOTFS. If a single device required a package to build a functional initramfs image, it should be included by default for all devices or that device should be isolated into a new subtarget. Now the initramfs will be built using the target-specific Implementing Per Device Rootfs for Initramfs is not trivial as the rootfs needs to be embedded in the kernel image. The kernel supports an option to define the initramfs location and the image generation for the kernel can't be run in parallel as other checks are done to config and other arch dependent files. To handle this, we prepare a config for each rootfs and we generate the images under lock to prevent problem with parallel execution. Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com> [ rework implementation for locking support ] Link: https://github.com/openwrt/openwrt/pull/12959 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: simplify SetInitramfs compression ALGO config setupChristian Marangi2024-07-06
| | | | | | | | | Simplify SetInitramfs compression ALGO config setup by using Makefile foreach. While at it also make it more readable. Link: https://github.com/openwrt/openwrt/pull/12959 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: make LINUX_DIR configurable for SetInitramfs functionsChristian Marangi2024-07-06
| | | | | | | | | | Rework SetInitramfs functions to take a second arg to define the location of the .config. This is needed in preparation for PER_ROOTFS Initramfs support as we will prepare .config in dedicated directory and use them only later when the image is actually built. Link: https://github.com/openwrt/openwrt/pull/12959 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* kernel: allow different TARGET_DIR for initramfsLuiz Angelo Daros de Luca2024-07-06
| | | | | | | | | | | | | Allow Kernel/CompileImage/Initramfs to use a different rootfs location. If the additional arg is not defined, TARGET_DIR is used by default. This allows the caller to customize the kernel initramfs for different rootfs. Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com> [ simplify commit and rework commit description ] Link: https://github.com/openwrt/openwrt/pull/12959 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* build: cache kernel module package compilingZeyu Dong2023-10-28
| | | | | | | | | | Kernel module packages compiling is not cached (e.g. mac80211) even with CONFIG_CCACHE on. CC should be set to KERNEL_CC in KERNEL_MAKE_FLAGS at kernel.mk to allow kernel module packages using ccache. Signed-off-by: Zeyu Dong <dzy201415@gmail.com>
* image: Fix the CONFIG_EXTERNAL_CPIO logicLuca Barbato2023-10-24
| | | | | | | | Fix the qstrip call. Fixes: #13776. Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
* kernel: add CONFIG_INITRAMFS_PRESERVE_MTIME config to Initramfs functionChristian Marangi2023-05-22
| | | | | | | New kernel version 6.1 introduced new INITRAMFS option. Add them to the Initramfs functions to correctly compile initramfs images. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
* build: revert 54070a1 (all kernels are >= 5.10)Sebastian Kemper2023-05-21
| | | | | | | Commit 54070a1 was added to allow building proper SDKs with kernels < 5.10. Now that all targets use at least kernel 5.10 it can be reverted. Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>
* build: fix incorrect initramfs gzip compressionTony Butler2023-04-18
| | | | | | | | | | | | | | | | | Requires: tools/libdeflate fix consistency of executable to use `$(STAGING_DIR_HOST)/bin/libdeflate-gzip`, and not system-installed ones from the usual environment `PATH`; this affects option `CONFIG_KERNEL_INITRAMFS_COMPRESSION_GZIP` this may have worked in the past but only via side effect of having the binaries on the host system (and whatever unpredictable version or patchset those might be), and did not use the improved but totally compatible libdeflate-gzip Fixes: 330bd380e8b6 ("image: allow building FIT and uImage with ramdisk") Signed-off-by: Tony Butler <spudz76@gmail.com>
* build: fix incorrect initramfs bzip2 compressionTony Butler2023-04-18
| | | | | | | | | | | | | | | Requires: tools/bzip2 fix consistency of executable to use `$(STAGING_DIR_HOST)/bin/bzip2`, and not system-installed ones from the usual environment `PATH`; this affects option `CONFIG_KERNEL_INITRAMFS_COMPRESSION_BZIP2` this may have worked in the past but only via side effect of having the binaries on the host system (and whatever unpredictable version or patchset those might be) Fixes: 330bd380e8b6 ("image: allow building FIT and uImage with ramdisk") Signed-off-by: Tony Butler <spudz76@gmail.com>
* include: use libdeflate's gzip to decompressRosen Penev2023-01-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | libdeflate decompresses much faster than gzip. Example: ~/d/openwrt> time gzip -dc dl/cmake-3.25.1.tar.gz > /dev/null ________________________________________________________ Executed in 1.01 secs fish external usr time 912.61 millis 1.67 millis 910.94 millis sys time 32.21 millis 0.25 millis 31.96 millis ~/d/openwrt> time libdeflate-gzip -dc dl/cmake-3.25.1.tar.gz > /dev/null ________________________________________________________ Executed in 523.04 millis fish external usr time 415.48 millis 1.07 millis 414.41 millis sys time 107.74 millis 0.15 millis 107.59 millis ~/d/openwrt> time gzip -dc dl/tessdata-4.1.0.tar.gz > /dev/null ________________________________________________________ Executed in 8.99 secs fish external usr time 8.90 secs 530.00 micros 8.90 secs sys time 0.07 secs 63.00 micros 0.07 secs ~/d/openwrt> time libdeflate-gzip -dc dl/tessdata-4.1.0.tar.gz > /dev/null ________________________________________________________ Executed in 2.74 secs fish external usr time 2.38 secs 537.00 micros 2.38 secs sys time 0.35 secs 66.00 micros 0.35 secs Place libdeflate into tools-core as it is needed to decompress other archives. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* build: fix incomplete initramfs compression optionsTony Butler2023-01-17
| | | | | | | | | | | | Requires: tools/lz4, tools/lzop complete the wiring so that these options work: * `CONFIG_KERNEL_INITRAMFS_COMPRESSION_LZO` * `CONFIG_KERNEL_INITRAMFS_COMPRESSION_LZ4` Signed-off-by: Tony Butler <spudz76@gmail.com> [remove blocking dependencies for separate ramdisk, fix lzop options] Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* uml: headers are not exportableChristian Lamparter2022-09-24
| | | | | | | | | | | | | | | | | | When building UML this showed up as of late (2022-09-01): | Makefile:1335: *** Headers not exportable for UML. Stop. This message popped up because of an upstream patch that fixed this error not showing up sooner. For more information see: <https://lore.kernel.org/lkml/20220901011252.550830-1-masahiroy@kernel.org/T/> Now, I don't think we can just skip the kernel headers. Some userspace applications are going to need these. So, The next best alternative I can think of, is to go with the headers by the host arch the UML is compiled for. (Technically, ARCH= should be safe for all other targets as well... But let's not poke a hornet's nest) Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
* kernel: set SOURCE_DATE_EPOCH for initramfs root dirDaniel Golle2022-04-06
| | | | | | | | Make sure the timestamp of the root directory of the initramfs is set to SOURCE_DATE_EPOCH as well. Fixes: 29d7461d11 ("kernel: set options to make external initramfs reproducible") Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* kernel: fix initramfs reproducibilityDaniel Golle2022-03-29
| | | | | | | | | Make sure xz uses at least 2 threads so compression always runs in multi-threaded mode as the resulting file in single-threaded mode differs. Fixes: 29d7461d11 ("kernel: set options to make external initramfs reproducible") Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* kernel: set options to make external initramfs reproducibleDaniel Golle2022-03-24
| | | | | | | Run cpio as well as compressors in such ways that they are generating reproducible output. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* image: fix CONFIG_EXTERNAL_CPIO handlingDaniel Golle2021-11-28
| | | | | | | | | CONFIG_EXTERNAL_CPIO is a string variable, hence testing for 'y' doesn't make much sense here. Fixes: 330bd380e8 ("image: allow building FIT and uImage with ramdisk") Reported-by: Huangbin Zhan <zhanhb88@gmail.com> Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* build: kernel: avoid unnecessary package rebuildsEneas U de Queiroz2021-11-01
| | | | | | | | | | | | | | | The $(LINUX_DIR)/.config timesptamp changes between runs of make target/compile and make target/install (which builds the image). Kernel-dependent packages and out of tree modules are built in between those runs, and they check the .config timestamp to decide if they need to be rebuilt. Save the target/compile .config to use its timestamp if the file does not change between runs. That way the subsequent kernel packages are not unnecessarily rebuilt when you run 'make' back to back. Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
* build: fix regression for kernels < 5.10Sebastian Kemper2021-05-25
| | | | | | | | | | | | | | | | | | | | This fixes a regression introduced with commit 5ed1e5140a80558ab47fd70410ae3242bed5becf ("build: build kernel image before building modules/packages"). Before this commit the make target would always include "modules", resulting in a MODPOST and a complete Module.symvers file. Since this commit a MODPOST of the kernel modules is not guaranteed for kernels < 5.10. This results in some broken SDKs in which external packages that depend on exported symbols from kernel modules fail to compile. Adding "modules" back to the calls to the CompileImage defines fixes the regression. For kernels > 5.10 this is not needed, but it doesn't cause any harm either. Tested with kernels 5.4.x and 5.10.x. Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>
* kernel-defaults: fix external kernel build when user_headers is missingMatt Merhar2021-05-23
| | | | | | | Use an 'if' so the absence of $(LINUX_DIR)/user_headers doesn't make the line evaluate to false and cause the build to fail. Signed-off-by: Matt Merhar <mattmerhar@protonmail.com>
* build: introduce $(MKHASH)Leonardo Mörlein2021-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before this commit, it was assumed that mkhash is in the PATH. While this was fine for the normal build workflow, this led to some issues if make TOPDIR="$(pwd)" -C "$pkgdir" compile was called manually. In most of the cases, I just saw warnings like this: make: Entering directory '/home/.../package/gluon-status-page' bash: line 1: mkhash: command not found bash: line 1: mkhash: command not found bash: line 1: mkhash: command not found bash: line 1: mkhash: command not found bash: line 1: mkhash: command not found bash: line 1: mkhash: command not found bash: line 1: mkhash: command not found bash: line 1: mkhash: command not found [...] While these were only warnings and the package still compiled sucessfully, I also observed that some package even fail to build because of this. After applying this commit, the variable $(MKHASH) is introduced. This variable points to $(STAGING_DIR_HOST)/bin/mkhash, which is always the correct path. Signed-off-by: Leonardo Mörlein <me@irrelefant.net>
* build: use numeric uid/gid on cpio callsFelix Fietkau2021-03-03
| | | | | | | There are systems that don't have the 'root' group, so don't rely on host specific user/group names Signed-off-by: Felix Fietkau <nbd@nbd.name>
* treewide: fix spelling 'seperate' -> 'separate'Daniel Golle2021-02-28
| | | | | | | This popular spelling mistake was also introduced by myself lately. Fix it everywhere. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* include: use cpio from staging dirDavid Bauer2021-02-28
| | | | | | | As we built our own CPIO now, use this version instead of whatever the host may or may not provide. Signed-off-by: David Bauer <mail@david-bauer.net>
* image: allow building FIT and uImage with ramdiskDaniel Golle2021-02-24
| | | | | | | | | | | | | Instead of embedding the initrd cpio archive into the kernel, allow for having an external ramdisk added to the FIT or uImage. This is useful to overcome kernel size limitations present in many stock bootloaders, as the ramdisk is then loaded seperately and doesn't add to the kernel size. Hence we can have larger ramdisks to host ie. installers with all binaries to flash included (or a web-based firmware selector). In terms of performance and total size the differences are neglectible. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* build: fix build with CONFIG_STRIP_KERNEL_EXPORTSFelix Fietkau2021-02-17
| | | | | | Only use symtab.h on the final kernel link Signed-off-by: Felix Fietkau <nbd@nbd.name>
* build: make zstd initramfs selectableFelix Fietkau2021-02-16
| | | | | | fix typo in kernel initramfs zstd compression option Signed-off-by: Felix Fietkau <nbd@nbd.name>
* build: build kernel image before building modules/packagesFelix Fietkau2021-02-16
| | | | | | | This is needed for linux 5.10, where modules.builtin is generated from vmlinux.o Signed-off-by: Felix Fietkau <nbd@nbd.name>
* build: use SPDX license tagsPaul Spooren2021-02-05
| | | | | | | | | The license folder is a core part of OpenWrt and all GPL-2.0 licensed. Use SPDX license tags to allow machines to check licenses. Signed-off-by: Paul Spooren <mail@aparcar.org> [rebase, keep some Copyright lines, sharpen commit message] Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
* kernel-defaults: Manage the enabling/disabling of ZSTDFlorian Fainelli2021-01-09
| | | | | | | | Linux 5.9 introduces support for ZSTD ramdisk and initrd compression, make sure we enable/disable the relevant options when building an initramfs enabled kernel. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
* kernel-defaults: Delete external source tree user_headersFlorian Fainelli2021-01-09
| | | | | | | | | | When we use an external kernel tree which may not have been fully cleaned, there may be user_headers left which do not match the target architecture, leading to build failures for packages that do an explicit inclusion of user_headers (such as iproute2 or iptables). Make sure we delete them while preparing the directory. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
* build: make testing kernel decompression more portableFelix Fietkau2020-12-05
| | | | | | | On non-GNU systems, zcat often does not handle gzip decompression. Use gzip -dc like the regular unpack command Signed-off-by: Felix Fietkau <nbd@nbd.name>
* kernel-defaults: ensure SOURCE_DATE_EPOCH on /initPaul Spooren2019-10-02
| | | | | | | | | | This is a follow up of 8cb13f4e6d which sets the right timestamp for the /init file in initramfs. The previous patch doesn't cover it as the files appear to come from a later step during compilation. CC: Alexander Couzens <lynxis@fe80.eu> Signed-off-by: Paul Spooren <mail@aparcar.org>
* kernel: fix downloading rcX releasesRafał Miłecki2018-12-03
| | | | | | | | They are no longer stored in the "testing" subdirectory and are not available as .tar.xz archives. If -rc is detected download it from the git.kernel.org and use .tar.gz. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
* config: don't define the same symbol twiceKoen Vandeputte2018-01-17
| | | | | | | | | | | | | | | | | In commit fce35bce0f6e ("config: support new symbol intro'd in kernel 4.12") I forgot to remove the initial debug test line. This clearly is wrong as the same symbol is defined conditionally in the line below as it should be. I looked over it as I just checked if the symbol was present now upon testing it. Fixes: fce35bce0f6e ("config: support new symbol intro'd in kernel 4.12") Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
* config: support new symbol intro'd in kernel 4.12Koen Vandeputte2018-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Symbol CONFIG_INITRAMFS_FORCE allows to ignore the value passed by the bootloader. By default, all symbols containing INITRAMFS are wiped from the final config and then re-added conditionally. Add support for this symbol, as the build will stop otherwise questioning the user about this option: * Restart config... * * * General setup * Cross-compiler tool prefix (CROSS_COMPILE) [] Compile also drivers which will not load (COMPILE_TEST) [N/y/?] n ... Initial RAM filesystem and RAM disk (initramfs/initrd) support (BLK_DEV_INITRD) [Y/n/?] y Initramfs source file(s) (INITRAMFS_SOURCE) [] Ignore the initramfs passed by the bootloader (INITRAMFS_FORCE) [N/y/?] (NEW) Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
* build: move definition of KBUILD_BUILD_TIMESTAMP to include/kernel.mkAlexander Couzens2017-06-17
| | | | | | | Fixes: 0aed054bec (build: add KERNEL_MAKE and KERNEL_MAKE_FLAGS variables and move to kernel.mk) Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
* build: add KERNEL_MAKE and KERNEL_MAKE_FLAGS variables and move to kernel.mkFelix Fietkau2017-06-07
| | | | | | | | This allows packages to use kernel make options without the forced -C $(LINUX_DIR). It also makes it more clear that it to be called from kernel module packages directly. Signed-off-by: Felix Fietkau <nbd@nbd.name>
* include: Do not alter KERNELRELEASE for external/git kernelsFlorian Fainelli2017-05-25
| | | | | | | | | In case we use external and/or git cloned kernels, let the kernel determine the appropriate KERNELRELEASE. We cannot used LINUX_UNAME_VERSION because that one gets determined at a later time, when the kernel is already built proper. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
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