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

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

On Sat, Sep 27, 2025 at 7:50=E2=80=AFAM Tom Herbert <[email protected]> w=
rote:
>
> So did you get it working then?
>
> On Sat, Sep 27, 2025, 7:34=E2=80=AFAM dave seddon <[email protected]=
om> 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@gmai=
l.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-dev
>> > 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 <[email protected]=
om> wrote:
>> > >
>> > > On Fri, Sep 26, 2025 at 5:47=E2=80=AFPM dave seddon <dave.seddon.ca@=
gmail.com> wrote:
>> > > >
>> > > > Ha! Indeed. I have a version of configure that has significantly m=
ore output. ( I removed all the pipes to null, which allowed me to get mile=
s 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/Comp=
ilerInstance.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 installed.=
  You guys must be developing on another distro?  I'm really just looking t=
o 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]> wrot=
e:
>> > > >>
>> > > >> On Fri, Sep 26, 2025 at 5:08=E2=80=AFPM dave seddon <dave.seddon.=
[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.1=
8.1
>> > > >> > 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.1=
8.1
>> > > >> > 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 th=
e
>> > > >> user :-(. Can you edit configure script and the build line under
>> > > >> check_clang_lib:
>> > > >>
>> > > >> $HOST_CXX -o $TMPDIR/clang_lib $TMPDIR/clang_lib.cpp \
>> > > >> `$HOST_LLVM_CONFIG --ldflags --cxxflags` -lclang -lLLVM -lclang-c=
pp >
>> > > >> /dev/null 2>&1
>> > > >>
>> > > >> to
>> > > >>
>> > > >> $HOST_CXX -o $TMPDIR/clang_lib $TMPDIR/clang_lib.cpp \
>> > > >> `$HOST_LLVM_CONFIG --ldflags --cxxflags` -lclang -lLLVM -lclang-c=
pp
>> > > >>
>> > > >> 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 much=
 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/ | grep =
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.1=
8.1
>> > > >> > 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



--=20
Regards,
Dave Seddon
+1 415 857 5102