On Sat, 27 Dec 2025 at 09:46, mark.yang via lists.openembedded.org <[email protected]> wrote: > > My error report is as follows. > https://errors.yoctoproject.org/Errors/Details/892988/ > > I am using only the openembedded-core layer, with nodistro. > local.conf > > PREFERRED_TOOLCHAIN_TARGET = "clang" > DISTRO_FEATURES:append = " ld-is-lld" > require conf/distro/include/lto.inc > DISTRO_FEATURES:append = " lto" > # The settings below were taken from meta-clang. > LTO:toolchain-clang:class-target = "${@bb.utils.contains('DISTRO_FEATURES', > 'thin-lto', '-flto=thin', '-flto -fuse-ld=lld', d)}" > LTO:toolchain-clang:class-nativesdk = > "${@bb.utils.contains('DISTRO_FEATURES', 'thin-lto', '-flto=thin', '-flto > -fuse-ld=lld', d)}" > > > dwarfsrcfiles checks .a files during the package process. > Whether using LTO or not, DWARF information is extracted by iterating through > .o files inside .a files. > However, they must be ELF objects. > > To summarize, it is as follows. > The problem is that when using clang + LTO, the .o files are not ELF but LLVM > IR bitcode.
Thanks for the reproduction instructions and the error message. The fix is somewhat problematic: - it relies on the particular console output from dwarfsrcfiles which may change over time (maybe subtly), and then the code around it will quietly cease to work; - it obscures other possible issues that would be exposed by the same error from dwarfsrcfiles: there can be many reasons for something not being a valid elf file, and they should remain fatal errors; - conversely for this particular use case it still emits warnings, even though there's nothing the user can do about it - should it rather say nothing if .a has only llvm-ir files? Is it possible to rather guard the call to dwarfsrcfiles with a set of conditions: inspecting .a file, clang as toolchain and lto in distro_features, and skip the call if all conditions are true? Alex
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