OpenAFS Master Repository branch, master, updated. openafs-devel-1_9_2-476-g499baf4

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit 499baf4fd7e6e780190f77a56ccd07d5257a7719
Author: Cheyenne Wills <cwills@sinenomine.net>
Date:   Fri May 15 09:01:07 2026 -0600

    cf: Ensure BTF info is created in tests for Linux
    
    The OpenAFS configure build step fails on an ArchLinux system with a
    7.0.5-arch1-1 Linux kernel.
    
    The configure test to determine how CFLAGS are passed to the Linux build
    process is failing in a post-compile step:
        build/tools/bpf/resolve_btfids/resolve_btfids
    with the following messages:
        Cannot find .BTF_ids or symbols sections, skip symbols resolution
        FAILED: btf permute: Invalid argument
        FAILED to sort BTF: Invalid argument
    
    The failure is during a step that is translating the dwarf debugging
    information into BTF.  BTF is the BPF Type Format that holds metadata
    used by the eBPF facility.
    
    Investigating the cause shows that the gcc compiler (16.1.1) with the
    default ArchLinux kernel build -O2 option results in optimizing out the
    debugging information related to the formal parameter
    (DW_TAG_formal_parameter) for the conftest function.
    
    The failure within resolve_btfids can be resolved by simply adding a
    function that references its parameter in a fashion that the compiler
    doesn't strip out the debugging information.  It's sufficient to simply
    have any DW_TAG_formal_parameter present in the compiler output.
    
    Add a dummy function, conftest_dummy() to the template that is used to
    create the C code used by configure when testing for Linux kernel
    features.  Adding the separate function to the template avoids altering
    the function body used by the existing Linux kernel feature checks.
    
    The build failure was reported to the OpenAFS-devel mailing list by
    Michael Dressel <michael.dressel@desy.de> with the following information
    
      dkms install --no-depmod openafs/1.8.16pre1 -k 7.0.5-arch1-1
    
      Error! Bad return status for module build on kernel: 7.0.5-arch1-1 (x86_64)
      Consult /var/lib/dkms/openafs/1.8.16pre1/build/make.log for more information.
    
    Change-Id: Ib03a673f6572c5c564274129987a1170b155e618
    Reviewed-on: https://gerrit.openafs.org/16792
    Reviewed-by: Andrew Deason <adeason@sinenomine.net>
    Reviewed-by: Marcio Brito Barbosa <mbarbosa@sinenomine.net>
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>

 src/cf/linux-test1.m4 | 4 ++++
 1 file changed, 4 insertions(+)

-- 
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