mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +00:00
4061191727
The install command is missing for an apt-get command. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
119 lines
3.1 KiB
ReStructuredText
119 lines
3.1 KiB
ReStructuredText
Building with GCC
|
|
=================
|
|
|
|
Dependencies
|
|
------------
|
|
|
|
For building U-Boot you need a GCC compiler for your host platform. If you
|
|
are not building on the target platform you further need a GCC cross compiler.
|
|
|
|
Debian based
|
|
~~~~~~~~~~~~
|
|
|
|
On Debian based systems the cross compiler packages are named
|
|
gcc-<architecture>-linux-gnu.
|
|
|
|
You could install GCC and the GCC cross compiler for the ARMv8 architecture with
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo apt-get install gcc gcc-aarch64-linux-gnu
|
|
|
|
Depending on the build targets further packages maybe needed
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo apt-get install bc bison build-essential coccinelle \
|
|
device-tree-compiler dfu-util efitools flex gdisk liblz4-tool \
|
|
libguestfs-tools libncurses-dev libpython3-dev libsdl2-dev libssl-dev \
|
|
lzma-alone openssl python3 python3-coverage python3-pyelftools \
|
|
python3-pytest python3-sphinxcontrib.apidoc python3-sphinx-rtd-theme swig
|
|
|
|
Prerequisites
|
|
-------------
|
|
|
|
For some boards you have to build prerequisite files before you can build
|
|
U-Boot, e.g. for the some boards you will need to build the ARM Trusted Firmware
|
|
beforehand. Please, refer to the board specific documentation
|
|
:doc:`../board/index`.
|
|
|
|
Configuration
|
|
-------------
|
|
|
|
Directory configs/ contains the template configuration files for the maintained
|
|
boards following the naming scheme::
|
|
|
|
<board name>_defconfig
|
|
|
|
These files have been stripped of default settings. So you cannot use them
|
|
directly. Instead their name serves as a make target to generate the actual
|
|
configuration file .config. For instance the configuration template for the
|
|
Odroid C2 board is called odroid-c2_defconfig. The corresponding .config file
|
|
is generated by
|
|
|
|
.. code-block:: bash
|
|
|
|
make odroid-c2_defconfig
|
|
|
|
You can adjust the configuration using
|
|
|
|
.. code-block:: bash
|
|
|
|
make menuconfig
|
|
|
|
Building
|
|
--------
|
|
|
|
When cross compiling you will have to specify the prefix of the cross-compiler.
|
|
You can either specify the value of the CROSS_COMPILE variable on the make
|
|
command line or export it beforehand.
|
|
|
|
.. code-block:: bash
|
|
|
|
CROSS_COMPILE=<compiler-prefix> make
|
|
|
|
Assuming cross compiling on Debian for ARMv8 this would be
|
|
|
|
.. code-block:: bash
|
|
|
|
CROSS_COMPILE=aarch64-linux-gnu- make
|
|
|
|
Build parameters
|
|
~~~~~~~~~~~~~~~~
|
|
|
|
A list of available parameters for the make command can be obtained via
|
|
|
|
.. code-block:: bash
|
|
|
|
make help
|
|
|
|
You can speed up compilation by parallelization using the -j parameter, e.g.
|
|
|
|
.. code-block:: bash
|
|
|
|
CROSS_COMPILE=aarch64-linux-gnu- make -j$(nproc)
|
|
|
|
Further important build parameters are
|
|
|
|
* O=<dir> - generate all output files in directory <dir>, including .config
|
|
* V=1 - verbose build
|
|
|
|
Other build targets
|
|
~~~~~~~~~~~~~~~~~~~
|
|
|
|
A list of all make targets can be obtained via
|
|
|
|
.. code-block:: bash
|
|
|
|
make help
|
|
|
|
Important ones are
|
|
|
|
* clean - remove most generated files but keep the configuration
|
|
* mrproper - remove all generated files + config + various backup files
|
|
|
|
Installation
|
|
------------
|
|
|
|
The process for installing U-Boot on the target device is device specific.
|
|
Please, refer to the board specific documentation :doc:`../board/index`.
|