Re: xdp2 on ubuntu-24.04.3-live-server-amd64?

On Sat, Sep 27, 2025 at 8:50=E2=80=AFAM dave seddon <[email protected]=
om> wrote:
>
> Yes!  This way I can work out how it works on ubuntu and will get it
> working with nix
>
> prerequisites
> https://github.com/xdp2-dev/xdp2/pull/3
>
> check_scapy()
> https://github.com/xdp2-dev/xdp2/pull/4

Thanks! I merged the pull requests.


Tom

>
> On Sat, Sep 27, 2025 at 7:50=E2=80=AFAM Tom Herbert <[email protected]>=
 wrote:
> >
> > So did you get it working then?
> >
> > On Sat, Sep 27, 2025, 7:34=E2=80=AFAM dave seddon <dave.seddon.ca@gmail=
.com> wrote:
> >>
> >> Oh.  And then "make" needs scapy, so you need to do "sudo apt install
> >> python3-scapy".  Maybe configure should check for scapy?
> >>
> >> On Sat, Sep 27, 2025 at 7:25=E2=80=AFAM dave seddon <dave.seddon.ca@gm=
ail.com> wrote:
> >> >
> >> > I added the extra packages "clang-tools libclang-dev llvm-dev "
> >> >
> >> > The full set of packages is now "build-essential gcc-multilib
> >> > pkg-config bison flex libboost-all-dev libpcap-dev graphviz libelf-d=
ev
> >> > clang clang-tools libclang-dev llvm llvm-dev libbpf-dev
> >> > linux-tools-$(uname -r)"
> >> >
> >> > das@ubuntu2404:~/xdp2/src$ ./configure
> >> >
> >> >
> >> > Platform is default
> >> > Architecture is x86_64
> >> > Architecture includes for x86_64 not found, using generic
> >> > Target Architecture is
> >> > COMPILER is gcc
> >> > XDP2_CLANG_VERSION=3D18.1.3
> >> > XDP2_C_INCLUDE_PATH=3D/usr/lib/llvm-18/lib/clang/18/include
> >> > XDP2_CLANG_RESOURCE_PATH=3D/usr/lib/llvm-18/lib/clang/18
> >> >
> >> > das@ubuntu2404:~/xdp2/src$
> >> >
> >> > On Fri, Sep 26, 2025 at 5:53=E2=80=AFPM Tom Herbert <tom@herbertland=
.com> wrote:
> >> > >
> >> > > On Fri, Sep 26, 2025 at 5:47=E2=80=AFPM dave seddon <dave.seddon.c=
[email protected]> wrote:
> >> > > >
> >> > > > Ha! Indeed. I have a version of configure that has significantly=
 more output. ( I removed all the pipes to null, which allowed me to get mi=
les past this in my nix version. )
> >> > > >
> >> > > >
> >> > > >
> >> > > > das@ubuntu2404:~/xdp2/src$ cp configure old.configure
> >> > > >
> >> > > > das@ubuntu2404:~/xdp2/src$ diff -u ./configure ./old.configure
> >> > > > --- ./configure 2025-09-27 00:40:29.837033843 +0000
> >> > > > +++ ./old.configure     2025-09-27 00:38:51.186921865 +0000
> >> > > > @@ -163,7 +163,7 @@
> >> > > >  }
> >> > > >  EOF
> >> > > >         $HOST_CXX -o $TMPDIR/clang_lib $TMPDIR/clang_lib.cpp    =
\
> >> > > > -                        `$HOST_LLVM_CONFIG --ldflags --cxxflags=
` -lclang -lLLVM -lclang-cpp
> >> > > > +                        `$HOST_LLVM_CONFIG --ldflags --cxxflags=
` -lclang -lLLVM -lclang-cpp > /dev/null 2>&1
> >> > > >         case $? in
> >> > > >                 0)      ;;
> >> > > >                 *)      echo Clang library missing or broken\! 1=
>&2
> >> > > > das@ubuntu2404:~/xdp2/src$
> >> > > >
> >> > > > das@ubuntu2404:~/xdp2/src$ ./configure
> >> > > >
> >> > > >
> >> > > > Platform is default
> >> > > > Architecture is x86_64
> >> > > > Architecture includes for x86_64 not found, using generic
> >> > > > Target Architecture is
> >> > > > COMPILER is gcc
> >> > > > config.SNTIAl/clang_lib.cpp:1:10: fatal error: clang/Frontend/Co=
mpilerInstance.h: No such file or directory
> >> > > >     1 | #include <clang/Frontend/CompilerInstance.h>
> >> > > >       |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >> > > > compilation terminated.
> >> > > > Clang library missing or broken!
> >> > > > das@ubuntu2404:~/xdp2/src$
> >> > > >
> >> > > >
> >> > > > I'm just using a little kvm VM with the base ubuntu LTS installe=
d.  You guys must be developing on another distro?  I'm really just looking=
 to understand the versions of things that work, so I can nix-ify this.
> >> > >
> >> > > Did you Google it? Here's what I got:
> >> > > https://stackoverflow.com/questions/20363082/working-with-clang-in=
-c
> >> > >
> >> > > Tom
> >> > >
> >> > > >
> >> > > > On Fri, Sep 26, 2025, 17:26 Tom Herbert <[email protected]> wr=
ote:
> >> > > >>
> >> > > >> On Fri, Sep 26, 2025 at 5:08=E2=80=AFPM dave seddon <dave.seddo=
[email protected]> wrote:
> >> > > >> >
> >> > > >> > I hope I'm not doing something silly
> >> > > >> >
> >> > > >> > das@ubuntu2404:/usr/lib/llvm-18/lib$ ls -la | grep libclang
> >> > > >> > lrwxrwxrwx 1 root root        40 May 27  2024 libclang-18.so.=
1 ->
> >> > > >> > ../../x86_64-linux-gnu/libclang-18.so.18
> >> > > >> > lrwxrwxrwx 1 root root        40 May 27  2024 libclang-18.so.=
18 ->
> >> > > >> > ../../x86_64-linux-gnu/libclang-18.so.18
> >> > > >> > -rw-r--r-- 1 root root  64796088 May 27  2024 libclang-cpp.so=
.18.1
> >> > > >> > lrwxrwxrwx 1 root root        17 May 27  2024 libclang.so.1 -=
> libclang-18.so.18
> >> > > >> >
> >> > > >> > das@ubuntu2404:/usr/lib/llvm-18/lib$ sudo ln -s libclang-cpp.=
so.18.1
> >> > > >> > libclang-cpp.so
> >> > > >> >
> >> > > >> > das@ubuntu2404:/usr/lib/llvm-18/lib$ ls -la | grep libclang
> >> > > >> > lrwxrwxrwx 1 root root        40 May 27  2024 libclang-18.so.=
1 ->
> >> > > >> > ../../x86_64-linux-gnu/libclang-18.so.18
> >> > > >> > lrwxrwxrwx 1 root root        40 May 27  2024 libclang-18.so.=
18 ->
> >> > > >> > ../../x86_64-linux-gnu/libclang-18.so.18
> >> > > >> > lrwxrwxrwx 1 root root        20 Sep 27 00:01 libclang-cpp.so=
 ->
> >> > > >> > libclang-cpp.so.18.1
> >> > > >> > -rw-r--r-- 1 root root  64796088 May 27  2024 libclang-cpp.so=
.18.1
> >> > > >> > lrwxrwxrwx 1 root root        17 May 27  2024 libclang.so.1 -=
> libclang-18.so.18
> >> > > >> > das@ubuntu2404:/usr/lib/llvm-18/lib$
> >> > > >> >
> >> > > >> > das@ubuntu2404:~$ cd xdp2/src/
> >> > > >> > das@ubuntu2404:~/xdp2/src$ ./configure
> >> > > >> >
> >> > > >> >
> >> > > >> > Platform is default
> >> > > >> > Architecture is x86_64
> >> > > >> > Architecture includes for x86_64 not found, using generic
> >> > > >> > Target Architecture is
> >> > > >> > COMPILER is gcc
> >> > > >> > Clang library missing or broken!
> >> > > >>
> >> > > >> Unfortunately, we've done too good of a job hiding output from =
the
> >> > > >> user :-(. Can you edit configure script and the build line unde=
r
> >> > > >> check_clang_lib:
> >> > > >>
> >> > > >> $HOST_CXX -o $TMPDIR/clang_lib $TMPDIR/clang_lib.cpp \
> >> > > >> `$HOST_LLVM_CONFIG --ldflags --cxxflags` -lclang -lLLVM -lclang=
-cpp >
> >> > > >> /dev/null 2>&1
> >> > > >>
> >> > > >> to
> >> > > >>
> >> > > >> $HOST_CXX -o $TMPDIR/clang_lib $TMPDIR/clang_lib.cpp \
> >> > > >> `$HOST_LLVM_CONFIG --ldflags --cxxflags` -lclang -lLLVM -lclang=
-cpp
> >> > > >>
> >> > > >> That should give the error causing the failure
> >> > > >>
> >> > > >> Tom
> >> > > >>
> >> > > >>
> >> > > >> > das@ubuntu2404:~/xdp2/src$
> >> > > >> >
> >> > > >> >
> >> > > >> > Also tried this, although I'm not sure the full path makes mu=
ch difference
> >> > > >> >
> >> > > >> > das@ubuntu2404:/usr/lib/llvm-18/lib$ sudo ln -s
> >> > > >> > /usr/lib/llvm-18/lib/libclang-cpp.so.18.1
> >> > > >> > /usr/lib/llvm-18/lib/libclang-cpp.so
> >> > > >> >
> >> > > >> > das@ubuntu2404:~/xdp2/src$ ls -la /usr/lib/llvm-18/lib/ | gre=
p clang
> >> > > >> > drwxr-xr-x 3 root root      4096 Sep 26 23:59 clang
> >> > > >> > lrwxrwxrwx 1 root root        40 May 27  2024 libclang-18.so.=
1 ->
> >> > > >> > ../../x86_64-linux-gnu/libclang-18.so.18
> >> > > >> > lrwxrwxrwx 1 root root        40 May 27  2024 libclang-18.so.=
18 ->
> >> > > >> > ../../x86_64-linux-gnu/libclang-18.so.18
> >> > > >> > lrwxrwxrwx 1 root root        41 Sep 27 00:06 libclang-cpp.so=
 ->
> >> > > >> > /usr/lib/llvm-18/lib/libclang-cpp.so.18.1
> >> > > >> > -rw-r--r-- 1 root root  64796088 May 27  2024 libclang-cpp.so=
.18.1
> >> > > >> > lrwxrwxrwx 1 root root        17 May 27  2024 libclang.so.1 -=
> libclang-18.so.18
> >> >
> >> >
> >> >
> >> > --
> >> > Regards,
> >> > Dave Seddon
> >> > +1 415 857 5102
> >>
> >>
> >>
> >> --
> >> Regards,
> >> Dave Seddon
> >> +1 415 857 5102
>
>
>
> --
> Regards,
> Dave Seddon
> +1 415 857 5102