to generate an installable OpenWrt firmware image file with a size of e.g. 8MB:
Install OpenWrt Buildroot and its prerequisites on your OS.
ca. 3-4 GB of available hard disk space
SED should not be set. If it is, run
unset SED before compiling. (See Ticket 10612.)
GREP_OPTIONS should not have –initial-tab or other options affecting its output
- Update OpenWrt sources.
- Update and install package feeds.
- Configure the firmware image you want to obtain.
- Start the build. This will automatically compile toolchain,cross-compile sources, package packages, and finally generate an image ready to be flashed.
- Proceed to Installing OpenWrt
Updating Sources with Git
./scripts/feeds update -a
Make downloaded package/packages available in make menuconfig:
./scripts/feeds install <PACKAGENAME>
./scripts/feeds install -a
- run make menuconfig and set target;
- run make defconfig;
- run make menuconfig and modify set of package;
- run scripts/diffconfig.sh >mydiffconfig (save your changes in the
text file mydiffconfig);
- run make V=s (build OpenWRT with console logging, you will look
where build failed.).
The OpenWrt Buildroot configuration interface handles the selection of the target platform, packages to be compiled, packages to be included in the firmware file, some kernel options, etc.
Start the OpenWrt Buildroot configuration interface by issuing the following command:
This will update the dependencies of your existing configuration automatically, and you can now proceed to build your updated images.
You have three options: y, m, n which are represented as follows:
pressing y sets the <*> built-in label
This package will be compiled and included in the firmware image file.
pressing m sets the
This package will be compiled, but not included in the firmware image file. (E.g. to be installed with opkg after flashing the firmware image file to the device.)
pressing n sets the < > excluded label
The source code will not be processed.
When you save your configuration, the file
make kernel_menuconfig CONFIG_TARGET=subtarget make defconfig make or make world
The make sequience
Top command make world calls the following sequence of the commands:
make target/compile make package/cleanup make package/compile make package/install make package/preconfig make target/install make package/index
You may run each command independency. For example, if the process of compilation of packages stops on error, you may fix problem and next continue without cleanup:
make package/compile make package/install make package/preconfig make target/install make package/index
Warnings, errors and tracing
make V=s or make V=99