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X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: ctyKzzXO3WwIi8Vz0IMpz8vgjkkajKNmSsCAS81ytY7jc603QizFGAfbGTPREBm+wOT8mfnNEdT46oQUQntICQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA3PR10MB8187 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-25_02,2025-11-24_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 adultscore=0 mlxlogscore=999 suspectscore=0 malwarescore=0 phishscore=0 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2510240000 definitions=main-2511250073 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTI1MDA3MiBTYWx0ZWRfX/5GXoQyJWSHJ 9Je+BM7BFe6+9L1R/rJlyBT7VVR1FG4opqB7id/ZZiIL88qoLcpw7vqIwoyzGfNmlBxrYNZgXr6 8M9Oj5Rrb6v7R3BQl8Hgu+lFg7B1AWv3zPoHMKldsV4CCdUTwxZDlrjkcXrVWPa13JAXvTHl1vf 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>>> Hello, >>> >>> On Tue, Oct 28, 2025 at 10:20:22AM +0000, Alan Maguire wrote: >>>> On 28/10/2025 09:05, Quentin Monnet wrote: >>>>> 2025-10-27 11:27 UTC-0700 ~ Namhyung Kim >>>>>> On Mon, Oct 27, 2025 at 11:41:01AM +0000, Quentin Monnet wrote: >>>>>>> 2025-10-26 21:01 UTC-0700 ~ Namhyung Kim >>>>>>>> Hello, >>>>>>>> >>>>>>>> I'm seeing a build failure like below in Fedora 40 and others. I'm not >>>>>>>> sure if it's reported already but it failed to build perf tools due to >>>>>>>> errors in the bootstrap bpftool. >>>>>>>> >>>>>>>> CC /build/util/bpf_skel/.tmp/bootstrap/sign.o >>>>>>>> sign.c:16:10: fatal error: openssl/opensslv.h: No such file or directory >>>>>>>> 16 | #include >>>>>>>> | ^~~~~~~~~~~~~~~~~~~~ >>>>>>>> compilation terminated. >>>>>>>> make[3]: *** [Makefile:256: /build/util/bpf_skel/.tmp/bootstrap/sign.o] Error 1 >>>>>>>> make[3]: *** Waiting for unfinished jobs.... >>>>>>>> make[2]: *** [Makefile.perf:1213: /build/util/bpf_skel/.tmp/bootstrap/bpftool] Error 2 >>>>>>>> make[1]: *** [Makefile.perf:289: sub-make] Error 2 >>>>>>>> make: *** [Makefile:76: all] Error 2 >>>>>>>> >>>>>>>> I think it's from the recent signing change. I'm not familiar with >>>>>>>> openssl but I guess there's a proper feature check for it. Is this a >>>>>>>> known issue? >>>>>>> >>>>>>> >>>>>>> Hi Namhyung, >>>>>> >>>>>> Hello! >>>>>> >>>>>>> >>>>>>> This looks related to the program signing change indeed, commit >>>>>>> 40863f4d6ef2 ("bpftool: Add support for signing BPF programs") >>>>>>> introduced a dependency on OpenSSL's development headers for bpftool. >>>>>>> It's not gated behind a feature check. On Fedora, I think the headers >>>>>>> come with openssl-devel, do you have this package installed? >>>>>> >>>>>> No I don't, but I guess it should be able to build on such systems. Or >>>>>> is it required for bpftool? Anyway I feel like it should have a feature >>>>>> check and appropriate error messages. >>>>>> >>>>> >>>>> +Cc KP >>>>> >>>>> We usually have feature checks when optional features bring in new >>>>> dependencies for bpftool, but we haven't discussed it this time. My >>>>> understanding was that program signing is important enough that it >>>>> should always be present in newer versions of bpftool, making OpenSSL >>>>> one of the required dependencies going forward. >>>>> >>>>> We don't currently have feature checks to tell when required >>>>> dependencies are missing for bpftool (it's just the build failing, in >>>>> that case). I know perf does a great job at it, we could look into it >>>>> for bpftool, too. >>>>> >>>> >>>> One issue here is that some distros package openssl v3 such that the >>>> #include files are in /usr/include/openssl3 and libraries in >>>> /usr/lib64/openssl3 so that older versions can co-exist. Maybe we could >>>> figure out a feature test that handles that too? >>> >>> What's the state of this? Is the fix in the bpf tree now? >> >> >> Hi Namhyung, Alan just submitted a v2 of his patch (targetting >> bpf-next), see: >> >> https://lore.kernel.org/all/20251120084754.640405-2-alan.maguire@oracle.com/ > > Hello Quentin, > > I'm afraid it doesn't fix my issue. It seems to fix another problem > about the error API. But I still see the build failure. > This header file is delivered by openssl-devel (could be openssl-dev on some distros). Looking at [1], it seems like that package has been a requirement to build kernels from 4.3 on. Is it missing on your system, installed to an unusual path like /usr/include/opensslv3, or is the package perhaps missing some header files? Alan [1] https://docs.kernel.org/process/changes.html > Thanks, > Namhyung > >