Dependencies for the configure script and Makefile not documented

[jontrossbach]

The XDP Tutorial lists how to use XDP outside of needing too many *-devel packages. But in general the xdp-tools' usage for the configure script and the Makefile don't seem to be documented anywhere obvious. Is that something to fix or am I missing something?

For example, when testing a new libbpf package with xdp-tools my set up is about the following on Fedora/CentOS/RHEL:

# dnf install clang elfutils-libelf elfutils-libelf-devel zlib-devel git llvm libpcap libpcap-devel sqlite-devel m4 libbpf bpftool
# git clone https://github.com/xdp-project/xdp-tools/
# export FORCE_SYSTEM_LIBBPF=1

before running:

# ./configure
# make

However, I don't know where I would confirm these are the same steps everyone expects.

[tohojo]

Jon Trossbach ***@***.***> writes:

The [XDP Tutorial](https://github.com/xdp-project/xdp-tutorial/blob/master/setup_dependencies.org#packages-on-fedora) lists how to use XDP outside of needing too many *-devel packages. But in general the xdp-tools' usage for the `configure` script and the `Makefile` don't seem to be documented anywhere obvious. Is that something to fix or am I missing something?

It's not documented, no; we should fix that. However, the configure script should complain if there are missing dependencies.

``` # dnf install clang elfutils-libelf elfutils-libelf-devel zlib-devel git llvm libpcap libpcap-devel sqlite-devel m4 libbpf bpftool # git clone https://github.com/xdp-project/xdp-tools/ # export FORCE_SYSTEM_LIBBPF=1 ```

The FORCE_SYSTEM_LIBBPF is mostly for packaging so the build fails if the system libbpf doesn't work; you can set it when manually building, of course, but the configure output will also tell you if the system libbpf is picked up or not, so you can also just keep an eye on that :)