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Andreas Gnau 49843b31bc uboot-mk: Enable specifying defconfig fragments 
U-Boot allows specifying additional KConfig fragments to be applied on
top of a defconfig. These are usually located in the board
sub-directory.

    make foo_defconfig bar.config baz.config

Add support for specifying additional KConfig fragments using the
UBOOT_CONFIG variable. Treat the first word in UBOOT_CONFIG as the name
of the defconfig, any additional words as additional fragments.

This can be useful to distinguish between different variants of U-Boot
builds such as different RAM, storage (NAND/eMMC), security etc.

While c05c0699d4 (u-boot.mk: add support for config customization,
2023-06-02) already added means to modify specific KConfig options
directly from the OpenWrt Makefile, leveraging existing fragments the
U-Boot source-dir provides a more convenient way to extend the config
when customising more than just one or two options. Furthermore it is
desirable to leverage existing fragments from upstream U-Boot where they
exist.

Signed-off-by: Andreas Gnau <andreas.gnau@iopsys.eu>
Link: https://github.com/openwrt/openwrt/pull/18963
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 		2025-06-07 21:10:28 +02:00
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config build: image: support specifying mksquashfs4 parallel threads 2025-06-05 21:28:03 +02:00
include uboot-mk: Enable specifying defconfig fragments 2025-06-07 21:10:28 +02:00
package wifi-scripts: add missing entries for mesh_nolearn 2025-06-07 12:54:50 +02:00
scripts
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target ramips: mt7621: add support for Arcadyan WE410443 2025-06-07 21:04:53 +02:00
toolchain
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tools tools/squashfs4: update to 4.7.0 2025-06-05 21:28:03 +02:00
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Config.in
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README.md
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rules.mk
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README.md

OpenWrt logo

OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.

Sunshine!

Download

Built firmware images are available for many architectures and come with a package selection to be used as WiFi home router. To quickly find a factory image usable to migrate from a vendor stock firmware to OpenWrt, try the Firmware Selector.

If your device is supported, please follow the Info link to see install instructions or consult the support resources listed below.

An advanced user may require additional or specific package. (Toolchain, SDK, ...) For everything else than simple firmware download, try the wiki download page:

Development

To build your own firmware you need a GNU/Linux, BSD or macOS system (case sensitive filesystem required). Cygwin is unsupported because of the lack of a case sensitive file system.

Requirements

You need the following tools to compile OpenWrt, the package names vary between distributions. A complete list with distribution specific packages is found in the Build System Setup documentation.

binutils bzip2 diff find flex gawk gcc-6+ getopt grep install libc-dev libz-dev
make4.1+ perl python3.7+ rsync subversion unzip which

Quickstart

  1. Run ./scripts/feeds update -a to obtain all the latest package definitions defined in feeds.conf / feeds.conf.default

  2. Run ./scripts/feeds install -a to install symlinks for all obtained packages into package/feeds/

  3. Run make menuconfig to select your preferred configuration for the toolchain, target system & firmware packages.

  4. Run make to build your firmware. This will download all sources, build the cross-compile toolchain and then cross-compile the GNU/Linux kernel & all chosen applications for your target system.

Related Repositories

The main repository uses multiple sub-repositories to manage packages of different categories. All packages are installed via the OpenWrt package manager called opkg. If you're looking to develop the web interface or port packages to OpenWrt, please find the fitting repository below.

  • LuCI Web Interface: Modern and modular interface to control the device via a web browser.

  • OpenWrt Packages: Community repository of ported packages.

  • OpenWrt Routing: Packages specifically focused on (mesh) routing.

  • OpenWrt Video: Packages specifically focused on display servers and clients (Xorg and Wayland).

Support Information

For a list of supported devices see the OpenWrt Hardware Database

Documentation

Support Community

  • Forum: For usage, projects, discussions and hardware advise.
  • Support Chat: Channel #openwrt on oftc.net.

Developer Community

License

OpenWrt is licensed under GPL-2.0