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Carlos Santos 0c96bda11e Makefile: allow rootfs overlays to override symbolic links 
Since commit 0db34529f4 we use rsync with the --keep-dirlinks option to
prevent overlays from accidentally overwriding /{usr,bin,sbin,lib} links
when BR2_ROOTFS_MERGED_USR option is enabled. Unfortunately this also
prevents replacing a symlink by a directory on purpose (e.g. /var/log,
to persist system logs).

Steps to reproduce:

- enable BR2_ROOTFS_MERGED_USR and BR2_PACKAGE_SKELETON_INIT_SYSV
- mkdir some_path/rootfs-overlay/var/log
- enable BR2_ROOTFS_OVERLAY="some_path/rootfs-overlay"
- run 'make'
- 'target/var/log' is still a symlink to '../tmp', not a directory

The --keep-dirlinks option can be dropped, since we run sanity checks
on overlays. Now the rsync invocation is identical to the SYSTEM_RSYNC
logic we have in system/system.mk, so use that variable.

Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
2019-02-06 17:11:02 +01:00
arch arch/mips: add (Marvell) Octeon III processor 2019-02-04 17:30:18 +01:00
board qemu/aarch64-virt: Emulate cortex-a53 in qemu to match Buildroot config 2019-01-27 22:38:45 +01:00
boot boot/uboot: add support for bundling ATF BL31 in ELF format into U-Boot 2019-02-06 16:51:23 +01:00
configs qemu_riscv64_virt_defconfig: fix linux header selection 2019-01-28 22:04:33 +01:00
docs Makefile: check rootfs overlays with BR2_ROOTFS_MERGED_USR enabled 2019-02-06 17:09:28 +01:00
fs fs/common.mk: make sure that static devices from packages are created 2018-12-04 21:53:14 +01:00
linux linux: bump Linux CIP to version v4.4.171-cip30 2019-02-05 17:33:18 +01:00
package skeleton-custom: install /bin, /lib, and /sbin 2019-02-06 17:03:43 +01:00
support skeleton-custom: use a script to check merged usr structure 2019-02-06 17:03:30 +01:00
system skeleton: use BR2_SYSTEM_DEFAULT_PATH as default PATH 2018-12-31 14:32:44 +01:00
toolchain toolchain: add variadic MI thunk support flag 2019-02-04 21:53:20 +01:00
utils utils/genrandconfig: drop qt4 fixups 2019-02-06 16:30:39 +01:00
.defconfig arch: remove support for sh64 2016-09-08 22:15:15 +02:00
.flake8 .flake8: ignore utils/diffconfig 2018-03-13 22:37:54 +01:00
.gitignore update gitignore 2013-05-04 12:41:55 +02:00
.gitlab-ci.yml .gitlab-ci.yml: use "extends" keyword 2019-02-06 11:40:28 +01:00
.gitlab-ci.yml.in .gitlab-ci.yml: use "extends" keyword 2019-02-06 11:40:28 +01:00
CHANGES Update for 2018.02.10 2019-01-31 22:12:51 +01:00
Config.in infra: add force build flag for host dependencies 2019-02-04 15:52:44 +01:00
Config.in.legacy package/qt: remove package 2019-02-06 15:47:13 +01:00
COPYING COPYING: add exception about patch licensing 2016-02-26 19:50:13 +01:00
DEVELOPERS package/brcm-patchram-plus: new package 2019-02-06 15:57:09 +01:00
Makefile Makefile: allow rootfs overlays to override symbolic links 2019-02-06 17:11:02 +01:00
Makefile.legacy Remove BR2_DEPRECATED 2016-10-15 23:14:45 +02:00
README README: add reference to submitting-patches 2016-02-01 19:16:08 +01:00

README 

Buildroot is a simple, efficient and easy-to-use tool to generate embedded
Linux systems through cross-compilation.

The documentation can be found in docs/manual. You can generate a text
document with 'make manual-text' and read output/docs/manual/manual.text.
Online documentation can be found at http://buildroot.org/docs.html

To build and use the buildroot stuff, do the following:

1) run 'make menuconfig'
2) select the target architecture and the packages you wish to compile
3) run 'make'
4) wait while it compiles
5) find the kernel, bootloader, root filesystem, etc. in output/images

You do not need to be root to build or run buildroot.  Have fun!

Buildroot comes with a basic configuration for a number of boards. Run
'make list-defconfigs' to view the list of provided configurations.

Please feed suggestions, bug reports, insults, and bribes back to the
buildroot mailing list: buildroot@buildroot.org
You can also find us on #buildroot on Freenode IRC.

If you would like to contribute patches, please read
https://buildroot.org/manual.html#submitting-patches