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

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 <[email protected]=
om> 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]>=
 wrote:
> >
> > On Fri, Sep 26, 2025 at 5:47=E2=80=AFPM dave seddon <dave.seddon.ca@gma=
il.com> 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 miles p=
ast 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` -lc=
lang -lLLVM -lclang-cpp
> > > +                        `$HOST_LLVM_CONFIG --ldflags --cxxflags` -lc=
lang -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/Compile=
rInstance.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.  Y=
ou guys must be developing on another distro?  I'm really just looking to u=
nderstand 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]> wrote:
> > >>
> > >> On Fri, Sep 26, 2025 at 5:08=E2=80=AFPM dave seddon <dave.seddon.ca@=
gmail.com> 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 -> lib=
clang-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 -> lib=
clang-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 under
> > >> 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 much di=
fference
> > >> >
> > >> > 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 cla=
ng
> > >> > 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 -> lib=
clang-18.so.18
>
>
>
> --
> Regards,
> Dave Seddon
> +1 415 857 5102



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