forge/pve-kernel-thunderx
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Clarify build instructions (#77)

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This change clarifies the instructions to build a kernel from source.
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@ -50,33 +50,27 @@ packages installed:
```bash
apt install devscripts asciidoc-base automake bc bison cpio dh-python flex git kmod libdw-dev libelf-dev libiberty-dev libnuma-dev libpve-common-perl libslang2-dev libssl-dev libtool lintian lz4 perl-modules python2-minimal rsync sed sphinx-common tar xmlto zlib1g-dev dwarves
```
In case you are building a kernel version >= 5.8, make sure you have installed at least [dwarves >= 1.16.0](https://packages.debian.org/bullseye/dwarves).
Unfortunately, this version is currently only available in the Debian Testing and Debian Unstable repositories. To work around this issue, we describe two options:
In case you are building a kernel version >= 5.8, make sure you have installed at least [dwarves >= 1.16.0](https://packages.debian.org/buster-backports/dwarves).
Unfortunately, this version is not available in the Debian Buster repositories, so you will have to install it from the buster-backports repository:
1. You may add the Debian Testing repository to your APT sources as described [here](https://serverfault.com/a/382101) and install the newer `dwarves` package as follows:
```shell
apt install -t testing dwarves
```
2. Alternatively, you may [download](https://packages.debian.org/bullseye/dwarves) the newer `dwarves` (>= 1.16) package from the Debian website and install the package manually, for example:
```shell
wget http://ftp.us.debian.org/debian/pool/main/d/dwarves-dfsg/dwarves_1.17-1_amd64.deb
apt install ./dwarves_1.17-1_amd64.deb
```bash
echo deb http://ftp.de.debian.org/debian buster-backports main >> /etc/apt/sources.list
apt update
apt install dwarves=1.19-1~bpo10+1
```
Or whatever version is available in backports when you are reading this guide.
#### Obtaining the source
```bash
git clone https://github.com/fabianishere/pve-edge-kernel
cd pve-ede-kernel
git checkout v5.11.x
git submodule update --init --depth=1 --recursive submodules/ubuntu-mainline
git submodule update --init --recursive
```
Afterwards, select the branch of your likings (e.g. `v5.8.x`).
You can select the branch of your likings by changing `v5.11.x`. This will automatically select the last patchversion for the minor version you have chosen. If you wan to select the patchversion too, you can check the [available tags](https://github.com/fabianishere/pve-edge-kernel/tags), for example `git checkout v5.11.8-1`.
#### Building
Invoking the following command will build the kernel and its associated packages:
```bash
make
```
The Makefile provides several environmental variables to control:
1. `PVE_BUILD_FLAVOR`
@ -99,6 +93,11 @@ The Makefile provides several environmental variables to control:
Kernel options may be controlled from the [debian/rules](debian/rules) file. To build with
additional patches, you may add them to the [patches/pve](patches/pve) directory.
Invoking the following command will build the kernel and its associated packages:
```bash
make
```
## Questions
If you have any questions or want to see additional versions, flavors or micro architectures being built, feel
free to open an issue on Github.