On Wed, 11 Mar 2020 10:36:47 -0700 "Andrii Nakryiko" <[email protected]> wrote:
> On Wed, Mar 11, 2020 at 10:33 AM <[email protected]> wrote: > > > > Hi all, > > > > Finally found the BPF blog and it's been nice to get more > > information on using libbpf directly since I don't have a lot of > > systems or kernel experience. > > Thanks! Glad it was useful. I assume this is the blog post[1]: [1] https://facebookmicrosites.github.io/bpf/blog/2020/02/20/bcc-to-libbpf-howto-guide.html Thanks for writing that Andrii! For using libbpf directly from C, we also have the XDP-tutorial[2], but doesn't contain BPF CO-RE examples. And it uses the old style map defines. We are planning to update/fix that, once LLVM 10 gets more widely available in distros. [2] https://github.com/xdp-project/xdp-tutorial > > > > Scanning through the "BCC to libbpf" post, I noticed Andrii calls > > for using clang 10. I went to look at llvm releases and only saw > > clang/llvm 9 (as of September 2019). Is clang 10 just built from > > source? > > For kernel/libbpf development we do build Clang from sources, but you > can install it from packages as well. See https://apt.llvm.org/, there > are packages for Clang 10 and even Clang 11 and they are updated > frequently. Let me give you the manual compile recipe (that I got from Eelco): git clone https://github.com/llvm/llvm-project.git cd llvm-project mkdir -p llvm/build/install cd llvm/build cmake -G "Ninja" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \ -DLLVM_ENABLE_PROJECTS="clang" \ -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$PWD/install .. ninja && ninja install export PATH=$PWD/install/bin:$PATH -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#1822): https://lists.iovisor.org/g/iovisor-dev/message/1822 Mute This Topic: https://lists.iovisor.org/mt/71884353/21656 Group Owner: [email protected] Unsubscribe: https://lists.iovisor.org/g/iovisor-dev/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
