| 15 Sep 2025 |
 matthewcroughan | this is all we get whenever an llvm strip/objcopy is used | 21:30:12 |
| matthewcroughan | regardless of any fancy flags | 21:30:21 |
 emily | that seems like a different matter | 21:41:16 |
| matthewcroughan | I have both a musl native and musl llvm nixos configuration build and working in github.com/MatthewCroughan/nixos-musl | 22:33:55 |
| matthewcroughan | don't pay any attention to the overlay horrors | 22:34:02 |
| matthewcroughan | upstreaming some of that eventually | 22:34:06 |
| matthewcroughan | my back hurts | 22:34:21 |
| 16 Sep 2025 |
|  Sapphire changed their profile picture. | 21:14:56 |
| 17 Sep 2025 |
|  QuadRadical (Ping) changed their profile picture. | 23:50:04 |
| 19 Sep 2025 |
| matthewcroughan | nix build github:nixos/nixpkgs/8d4ddb19d03c65a36ad8d189d001dc32ffb0306b#pkgsMusl.pkgsLLVM.zig_0_14
error: Cannot build '/nix/store/0yy2hk73fpin5g2gv0s0clpx6qddsxlg-zig-aarch64-unknown-linux-musl-0.14.1.drv'.
Reason: builder failed with exit code 1.
Output paths:
/nix/store/lvq2agcwjfzahz3cim2m142jhivakbaq-zig-aarch64-unknown-linux-musl-0.14.1-doc
/nix/store/ygp8h8y3adpkc4h4bfspyrz3ybl2wyqn-zig-aarch64-unknown-linux-musl-0.14.1
Last 25 log lines:
> >>> referenced by LiveStacks.cpp.o:(llvm::LiveStacks::getOrCreateInterval(int, llvm::TargetRegisterClass const*)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMCodeGen.a
> >>> referenced by LiveStacks.cpp.o:(llvm::LiveStacks::getOrCreateInterval(int, llvm::TargetRegisterClass const*)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMCodeGen.a
> >>> referenced 675 more times
>
> aarch64-unknown-linux-musl-ld: error: undefined symbol: std::__detail::_Prime_rehash_policy::_M_need_rehash(unsigned long, unsigned long, unsigned long) const
> >>> referenced by LiveStacks.cpp.o:(llvm::LiveStacks::getOrCreateInterval(int, llvm::TargetRegisterClass const*)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMCodeGen.a
> >>> referenced by ELFAttributeParser.cpp.o:(std::_Hashtable<unsigned int, std::pair<unsigned int const, unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int>>, std::__detail::_Select1st, std::equal_to<unsigned int>, std::hash<unsigned int>, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<false, false, true>>::_M_insert_unique_node(unsigned long, unsigned long, std::__detail::_Hash_node<std::pair<unsigned int const, unsigned int>, false>*, unsigned long)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMSupport.a
> >>> referenced by ARMAttributeParser.cpp.o:(llvm::ARMAttributeParser::also_compatible_with(llvm::ARMBuildAttrs::AttrType)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMSupport.a
> >>> referenced 62 more times
>
> aarch64-unknown-linux-musl-ld: error: undefined symbol: std::__throw_bad_array_new_length()
> >>> referenced by LiveStacks.cpp.o:(llvm::LiveStacks::getOrCreateInterval(int, llvm::TargetRegisterClass const*)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMCodeGen.a
> >>> referenced by StackLifetime.cpp.o:(llvm::StackLifetime::calculateLocalLiveness() (.localalias)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMAnalysis.a
> >>> referenced by StackLifetime.cpp.o:(llvm::StackLifetime::collectMarkers() (.localalias)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMAnalysis.a
> >>> referenced 556 more times
>
> aarch64-unknown-linux-musl-ld: error: undefined symbol: std::__throw_logic_error(char const*)
> >>> referenced by RegionInfo.cpp.o:(llvm::RegionBase<llvm::RegionTraits<llvm::Function>>::getNameStr[abi:cxx11]() const) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMAnalysis.a
> >>> referenced by IRSymtab.cpp.o:((anonymous namespace)::Builder::getComdatIndex(llvm::Comdat const*, llvm::Module const*)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMObject.a
> >>> referenced by VirtualFileSystem.cpp.o:(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(char const*, unsigned long, std::allocator<char> const&) (.isra.0)) in archive /nix/store/ddd7c61p98aaw1as33q7lfzvq647c7jd-llvm-19.1.7-lib/lib/libLLVMSupport.a
> >>> referenced 469 more times
>
> aarch64-unknown-linux-musl-ld: error: too many errors emitted, stopping now (use --error-limit=0 to see all errors)
> clang++: error: linker command failed with exit code 1 (use -v to see invocation)
> ninja: build stopped: subcommand failed.
For full logs, run:
nix log /nix/store/0yy2hk73fpin5g2gv0s0clpx6qddsxlg-zig-aarch64-unknown-linux-musl-0.14.1.drv
| 16:06:42 |
| matthewcroughan | Tristan Ross: here's a minimal reproducer | 16:06:46 |
| matthewcroughan | Looks like it's no better in zig 0.15 | 16:59:15 |
| matthewcroughan | afaik zig should support this, I wonder what's going wrong | 16:59:25 |
| matthewcroughan | Redacted or Malformed Event | 17:08:04 |
| matthewcroughan | Redacted or Malformed Event | 17:08:10 |
| matthewcroughan | pkgsMusl.zig_0_14 seems to build fine, so it's just LLVM causing it | 17:22:30 |
| matthewcroughan | found https://www.reddit.com/r/Zig/comments/18x1wce/is_it_true_that_zig_wants_to_move_away_from_llvm/ 🤔 | 17:22:57 |
| 21 Sep 2025 |
| matthewcroughan | Tristan Ross: When I compile a fully LLVM system, the vm attribute produces something that says this | 00:14:44 |
| matthewcroughan | unable to handle EFI zboot image with "zstd" compression
qemu-system-aarch64: could not load kernel '/nix/store/fiwxkwxq0nsbmlsbi44cj3jmv0c175nl-nixos-system-nixos-25.11.20250919.8eaee11/kernel'
``
| 00:14:56 |
| matthewcroughan | * unable to handle EFI zboot image with "zstd" compression
qemu-system-aarch64: could not load kernel '/nix/store/fiwxkwxq0nsbmlsbi44cj3jmv0c175nl-nixos-system-nixos-25.11.20250919.8eaee11/kernel'
| 00:15:01 |
| matthewcroughan | However..
boot.kernelPatches = [
{
name = "config-enable-zboot";
patch = null;
structuredExtraConfig = {
EFI_ZBOOT = lib.mkForce lib.kernel.yes;
KERNEL_ZSTD = lib.mkForce lib.kernel.yes;
RD_ZSTD = lib.mkForce lib.kernel.yes;
};
}
];
| 00:15:19 |
| matthewcroughan | so I'm not sure what's happening there | 00:15:24 |
| matthewcroughan | https://grep.app/qemu/qemu/master/hw/core/loader.c?q=unable+to+handle+EFI+zboot+image+with#L887 | 00:15:51 |
| matthewcroughan | Ah okay I see, I'm producing a linux kernel with vmlinuz.efi as the target, which isn't supported by qemu on arm64 I guess | 00:17:34 |
| matthewcroughan | * Ah okay I see, I'm producing a linux kernel with vmlinuz.efi as the target, which isn't supported by qemu on aarch64 I guess | 00:17:38 |
| matthewcroughan | whereas for musl I'm just setting crossSystem, here I'm setting nixpkgs.hostPlatform and some linux-kernel args leaked in from my other experiments | 00:18:00 |
 Tristan Ross | In reply to @matthewcroughan:defenestrate.it
Ah okay I see, I'm producing a linux kernel with vmlinuz.efi as the target, which isn't supported by qemu on arm64 I guess Just do an uncompressed kernel | 01:12:34 |
| matthewcroughan | I did, that worked fine | 01:12:43 |
| matthewcroughan | I have an llvm, llvm-musl, llvm nixos config and the minimal nix files to change that now | 01:12:57 |
| matthewcroughan | it's not too much, but it was a lot of research | 01:13:34 |
