buildroot/linux/linux.mk, branch 2016.08

linux: allow the selection of the architecture's default configuration

2016-06-18T13:05:15+00:00

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 Signed-off-by: Thomas Petazzoni Acked-by: "Yann E. MORIN" Signed-off-by: Thomas Petazzoni

linux: align endianess based on the Buildroot configuration

2016-06-11T14:19:30+00:00

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 [Thomas: tweak commit message, add comment in .mk file.] Signed-off-by: Thomas Petazzoni

linux: use the generic help rules

2016-06-07T20:10:20+00:00

Signed-off-by: "Yann E. MORIN" Cc: Arnout Vandecappelle Cc: Thomas Petazzoni [Thomas: don't use the helper.] Signed-off-by: Thomas Petazzoni

linux: provide symlink dtc->linux-dtc is there is no dtc yet

2016-05-31T20:40:34+00:00

Commit ab74e09eb4e28dab8bed8d783c5f0464d39a32e7 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 Signed-off-by: Thomas De Schampheleire Reviewed-by: Arnout Vandecappelle (Essensium/Mind) Signed-off-by: Thomas Petazzoni

linux: properly install all images in the initramfs case

2016-04-25T19:40:47+00:00

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 055e6162bba7 ("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: 055e6162bba7 ("linux: don't build appended DTB image in place and support multiple images") Signed-off-by: Sebastian Frias Tested-by: Thomas Petazzoni Signed-off-by: Thomas Petazzoni

linux: Add custom Subversion repository support for the package

2016-04-05T20:28:09+00:00

Signed-off-by: Pauli Sundberg Signed-off-by: Peter Korsgaard

linux: add conditional patch for timeconst.pl

2016-02-10T07:12:57+00:00

Kernels older than 3.9 (not counting stable releases) used the timeconst.pl perl script for their build process. The problem with this script is that it used deprecated perl features, namely defined(@array) which was removed for the perl 5.22 release, causing build failure of older kernels on newer distributions. To fix this instead of going the hard way (moving to the new timeconst.bc script) use the easy way by patching timeconst.pl with an upstream patch used for stable releases. First try a dry-run on the patch to see if it applies, if it does then call a proper APPLY_PATCHES to it. Tested against an arbitrary 2.6.30 kernel (applies and builds), against 4.4.1 for a missing timeconst.pl (does not apply since it's missing) and 3.8.13 (does not apply since it's fixed already). Known broken distributions: fedora 23, debian testing (stretch) and unstable (sid). Signed-off-by: Gustavo Zacarias Signed-off-by: Peter Korsgaard

linux: drop the option to use the same version as that of the headers

2016-02-06T09:58:24+00:00

It is no longer meaningful, now that we have the option to use the kernel version for the linux headers, as it is more logical and more versatile. Add it to legacy. Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Cc: Peter Korsgaard Cc: Arnout Vandecappelle Signed-off-by: Thomas Petazzoni

kernel-module-imx-gpu-viv: add new package

2016-02-02T09:20:46+00:00

This is the Vivante kernel driver split from the kernel source code in order to make it possible to be used in any kernel source since 3.10.53. The driver source code provided by Freescale needs fixes so the community forked the code to allow faster development and easier integration of fixes from the community. This patch is based on the Yocto equivalent: https://github.com/Freescale/meta-fsl-arm/commit/32cf391 https://github.com/Freescale/meta-fsl-arm/commit/4249193 This package has been tested with the following commands: # modprobe galcore # cd /usr/share/examples/viv_samples/vdk/ # ./tutorial7 Signed-off-by: Gary Bisson Signed-off-by: Thomas Petazzoni

linux: handle read-only dts files

2016-01-19T20:46:58+00:00

Some fine version control systems make all files read-only. The custom DTS file may therefore be read-only, and that permission is preserved when copying into the Linux build directory. A subsequent rebuild tries to 'cp' again, which fails with a "Permission denied" error unless the -f option is used. Signed-off-by: Hollis Blanchard Acked-by: Nikolay Dimitrov Acked-by: "Yann E. MORIN" Signed-off-by: Thomas Petazzoni