arm-linux-musleabihf

[andrewrk]

[  5%] Linking CXX executable ../../bin/llvm-tblgen
warning: unsupported linker arg: -allow-shlib-undefined
warning: unsupported linker arg: -O3
warning: unsupported linker arg: --gc-sections
lld: error: undefined symbol: _Unwind_Resume
>>> referenced by cxa_guard.cpp
>>>               /home/andy/.cache/zig/stage1/o/LXJ6UCtVoQ2R9vWp__dOACHpfLGEHpsWZAbrKIseuPa2QI20nDtL1U6OlB0dmZSh/cxa_guard.o:(__cxa_guard_acquire) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_demangle.cpp
>>>               /home/andy/.cache/zig/stage1/o/nTgnXN0Jb-D7x1Fyg3kX1rA2lf0ZBX6O7Jv-3wCaFT1cyXdPB3blFvdhBRpJzlbo/cxa_demangle.o:(__cxa_demangle) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_demangle.cpp
>>>               /home/andy/.cache/zig/stage1/o/nTgnXN0Jb-D7x1Fyg3kX1rA2lf0ZBX6O7Jv-3wCaFT1cyXdPB3blFvdhBRpJzlbo/cxa_demangle.o:(__cxa_demangle) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_demangle.cpp
>>>               /home/andy/.cache/zig/stage1/o/nTgnXN0Jb-D7x1Fyg3kX1rA2lf0ZBX6O7Jv-3wCaFT1cyXdPB3blFvdhBRpJzlbo/cxa_demangle.o:((anonymous namespace)::itanium_demangle::AbstractManglingParser<(anonymous namespace)::itanium_demangle::ManglingParser<(anonymous namespace)::DefaultAllocator>, (anonymous namespace)::DefaultAllocator>::parseTemplateArgs(bool)) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_demangle.cpp
>>>               /home/andy/.cache/zig/stage1/o/nTgnXN0Jb-D7x1Fyg3kX1rA2lf0ZBX6O7Jv-3wCaFT1cyXdPB3blFvdhBRpJzlbo/cxa_demangle.o:((anonymous namespace)::itanium_demangle::ForwardTemplateReference::hasRHSComponentSlow((anonymous namespace)::itanium_demangle::OutputStream&) const) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_demangle.cpp
>>>               /home/andy/.cache/zig/stage1/o/nTgnXN0Jb-D7x1Fyg3kX1rA2lf0ZBX6O7Jv-3wCaFT1cyXdPB3blFvdhBRpJzlbo/cxa_demangle.o:((anonymous namespace)::itanium_demangle::ForwardTemplateReference::hasArraySlow((anonymous namespace)::itanium_demangle::OutputStream&) const) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_demangle.cpp
>>>               /home/andy/.cache/zig/stage1/o/nTgnXN0Jb-D7x1Fyg3kX1rA2lf0ZBX6O7Jv-3wCaFT1cyXdPB3blFvdhBRpJzlbo/cxa_demangle.o:((anonymous namespace)::itanium_demangle::ForwardTemplateReference::hasFunctionSlow((anonymous namespace)::itanium_demangle::OutputStream&) const) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_demangle.cpp
>>>               /home/andy/.cache/zig/stage1/o/nTgnXN0Jb-D7x1Fyg3kX1rA2lf0ZBX6O7Jv-3wCaFT1cyXdPB3blFvdhBRpJzlbo/cxa_demangle.o:((anonymous namespace)::itanium_demangle::ForwardTemplateReference::getSyntaxNode((anonymous namespace)::itanium_demangle::OutputStream&) const) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_demangle.cpp
>>>               /home/andy/.cache/zig/stage1/o/nTgnXN0Jb-D7x1Fyg3kX1rA2lf0ZBX6O7Jv-3wCaFT1cyXdPB3blFvdhBRpJzlbo/cxa_demangle.o:((anonymous namespace)::itanium_demangle::ForwardTemplateReference::printLeft((anonymous namespace)::itanium_demangle::OutputStream&) const) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_demangle.cpp
>>>               /home/andy/.cache/zig/stage1/o/nTgnXN0Jb-D7x1Fyg3kX1rA2lf0ZBX6O7Jv-3wCaFT1cyXdPB3blFvdhBRpJzlbo/cxa_demangle.o:((anonymous namespace)::itanium_demangle::ForwardTemplateReference::printRight((anonymous namespace)::itanium_demangle::OutputStream&) const) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced 90 more times

lld: error: undefined symbol: _Unwind_RaiseException
>>> referenced by cxa_exception.cpp
>>>               /home/andy/.cache/zig/stage1/o/2UpEDygc3DpAQeDk9mwJcBinvpku9bfuYICqJbD-ihBbJGMIVn4o9vk4sS62MEGZ/cxa_exception.o:(__cxa_throw) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_exception.cpp
>>>               /home/andy/.cache/zig/stage1/o/2UpEDygc3DpAQeDk9mwJcBinvpku9bfuYICqJbD-ihBbJGMIVn4o9vk4sS62MEGZ/cxa_exception.o:(__cxa_rethrow) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_exception.cpp
>>>               /home/andy/.cache/zig/stage1/o/2UpEDygc3DpAQeDk9mwJcBinvpku9bfuYICqJbD-ihBbJGMIVn4o9vk4sS62MEGZ/cxa_exception.o:(__cxa_rethrow_primary_exception) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a

lld: error: undefined symbol: _Unwind_DeleteException
>>> referenced by cxa_exception.cpp
>>>               /home/andy/.cache/zig/stage1/o/2UpEDygc3DpAQeDk9mwJcBinvpku9bfuYICqJbD-ihBbJGMIVn4o9vk4sS62MEGZ/cxa_exception.o:(__cxa_end_catch) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a

lld: error: undefined symbol: _Unwind_VRS_Set
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__gxx_personality_v0) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__gxx_personality_v0) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__gxx_personality_v0) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__gxx_personality_v0) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a

lld: error: undefined symbol: _Unwind_VRS_Get
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__gxx_personality_v0) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__gxx_personality_v0) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__gxx_personality_v0) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__cxxabiv1::scan_eh_tab(__cxxabiv1::(anonymous namespace)::scan_results&, _Unwind_Action, bool, _Unwind_Control_Block*, _Unwind_Context*)) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a

lld: error: undefined symbol: __gnu_unwind_frame
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__gxx_personality_v0) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a

lld: error: undefined symbol: _Unwind_GetLanguageSpecificData
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__cxxabiv1::scan_eh_tab(__cxxabiv1::(anonymous namespace)::scan_results&, _Unwind_Action, bool, _Unwind_Control_Block*, _Unwind_Context*)) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a

lld: error: undefined symbol: _Unwind_GetRegionStart
>>> referenced by cxa_personality.cpp
>>>               /home/andy/.cache/zig/stage1/o/FFtIKI4fP9Vftn2C2fQht7A0PKVyVfOBPDBYXNvAo2sR73USdUTDk_jSLNdV9kVA/cxa_personality.o:(__cxxabiv1::scan_eh_tab(__cxxabiv1::(anonymous namespace)::scan_results&, _Unwind_Action, bool, _Unwind_Control_Block*, _Unwind_Context*)) in archive /home/andy/.cache/zig/stage1/o/_TNe8eWFsSv6GGM1wA2mhHGPTa9t9p1Uf5-tXWy6rTl5YdbnT1QDjiXZSA-6EmxW/libc++abi.a

make[2]: *** [utils/TableGen/CMakeFiles/llvm-tblgen.dir/build.make:176: bin/llvm-tblgen] Error 1
make[1]: *** [CMakeFiles/Makefile2:8865: utils/TableGen/CMakeFiles/llvm-tblgen.dir/all] Error 2
make: *** [Makefile:152: all] Error 2

[andrewrk]

The linker args are ziglang/zig#4784 but I don't think are required to be fixed for this particular issue.

Next steps:

• determine whether llvm's libunwind (which zig has copied the sources of) supports 32-bit arm
• make sure the linker line includes libunwind.a

[andrewrk]

With the following diff (which I will test and apply upstream):

diff --git a/zig/src/link.cpp b/zig/src/link.cpp
index 693aaca0e..ed6275ec3 100644
--- a/zig/src/link.cpp
+++ b/zig/src/link.cpp
@@ -1947,15 +1947,11 @@ static void construct_linker_job_elf(LinkJob *lj) {
                 lj->args.append("-lpthread");
             }
         } else if (target_is_glibc(g->zig_target)) {
-            if (target_supports_libunwind(g->zig_target)) {
-                lj->args.append(build_libunwind(g, lj->build_dep_prog_node));
-            }
+            lj->args.append(build_libunwind(g, lj->build_dep_prog_node));
             add_glibc_libs(lj);
             lj->args.append(get_libc_crt_file(g, "libc_nonshared.a", lj->build_dep_prog_node));
         } else if (target_is_musl(g->zig_target)) {
-            if (target_supports_libunwind(g->zig_target)) {
-                lj->args.append(build_libunwind(g, lj->build_dep_prog_node));
-            }
+            lj->args.append(build_libunwind(g, lj->build_dep_prog_node));
             lj->args.append(build_musl(g, lj->build_dep_prog_node));
         } else if (g->libcpp_link_lib != nullptr) {
             lj->args.append(build_libunwind(g, lj->build_dep_prog_node));
diff --git a/zig/src/target.cpp b/zig/src/target.cpp
index 030721683..4430adfe5 100644
--- a/zig/src/target.cpp
+++ b/zig/src/target.cpp
@@ -1295,19 +1295,6 @@ const char *target_arch_musl_name(ZigLLVM_ArchType arch) {
     }
 }
 
-bool target_supports_libunwind(const ZigTarget *target) {
-    switch (target->arch) {
-        case ZigLLVM_arm:
-        case ZigLLVM_armeb:
-        case ZigLLVM_riscv32:
-        case ZigLLVM_riscv64:
-            return false;
-        default:
-            return true;
-    }
-    return true;
-}
-
 bool target_libc_needs_crti_crtn(const ZigTarget *target) {
     if (target->arch == ZigLLVM_riscv32 || target->arch == ZigLLVM_riscv64 || target_is_android(target)) {
         return false;
diff --git a/zig/src/target.hpp b/zig/src/target.hpp
index c3f8530e0..898fa9020 100644
--- a/zig/src/target.hpp
+++ b/zig/src/target.hpp
@@ -119,7 +119,6 @@ bool target_supports_stack_probing(const ZigTarget *target);
 bool target_supports_sanitize_c(const ZigTarget *target);
 bool target_has_debug_info(const ZigTarget *target);
 const char *target_arch_musl_name(ZigLLVM_ArchType arch);
-bool target_supports_libunwind(const ZigTarget *target);
 
 uint32_t target_arch_pointer_bit_width(ZigLLVM_ArchType arch);
 uint32_t target_arch_largest_atomic_bits(ZigLLVM_ArchType arch);

The new problem is:

lld: error: undefined symbol: typeinfo for llvm::cl::GenericOptionValue
>>> referenced by YAMLBench.cpp
>>>               CMakeFiles/yaml-bench.dir/YAMLBench.cpp.o:(typeinfo for llvm::cl::OptionValueCopy<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >)
>>> referenced by YAMLBench.cpp
>>>               CMakeFiles/yaml-bench.dir/YAMLBench.cpp.o:(typeinfo for llvm::cl::OptionValueCopy<bool>)
>>> referenced by YAMLBench.cpp
>>>               CMakeFiles/yaml-bench.dir/YAMLBench.cpp.o:(typeinfo for llvm::cl::OptionValueCopy<unsigned int>)
>>> did you mean: vtable for llvm::cl::GenericOptionValue
>>> defined in: ../../lib/libLLVMSupport.a(CommandLine.cpp.o)

lld: error: undefined symbol: typeinfo for llvm::cl::Option
>>> referenced by YAMLBench.cpp
>>>               CMakeFiles/yaml-bench.dir/YAMLBench.cpp.o:(typeinfo for llvm::cl::opt<llvm::cl::boolOrDefault, false, llvm::cl::parser<llvm::cl::boolOrDefault> >)
>>> did you mean: vtable for llvm::cl::Option
>>> defined in: ../../lib/libLLVMSupport.a(CommandLine.cpp.o)

[andrewrk]

This diff gets past the problem (since we have tbl-gen from the host llvm we don't need to build tools or utilities):

--- a/build
+++ b/build
@@ -53,6 +53,8 @@ cmake "$ROOTDIR/llvm" \
   -DLLVM_TABLEGEN="$ROOTDIR/out/host/bin/llvm-tblgen" \
   -DCLANG_TABLEGEN="$ROOTDIR/out/build-llvm-host/bin/clang-tblgen" \
   -DLLVM_BUILD_TOOLS=OFF \
+  -DLLVM_INCLUDE_TOOLS=OFF \
+  -DLLVM_INCLUDE_UTILS=OFF \
   -DLLVM_INCLUDE_TESTS=OFF \
   -DLLVM_INCLUDE_GO_TESTS=OFF \
   -DLLVM_INCLUDE_EXAMPLES=OFF \

Now it gets to here, when configuring Zig:

Configuring zig version 0.5.0+6408766d6
-- Found llvm: /home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMXRay.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMWindowsManifest.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMTableGen.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSymbolize.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMDebugInfoPDB.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMOrcJIT.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMOrcError.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMJITLink.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMObjectYAML.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMMCA.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMLTO.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMPasses.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMObjCARCOpts.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMLineEditor.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMLibDriver.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMInterpreter.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMFuzzMutate.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMFrontendOpenMP.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMMCJIT.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMExecutionEngine.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMRuntimeDyld.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMDWARFLinker.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMDlltoolDriver.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMOption.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMDebugInfoGSYM.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMCoverage.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMCoroutines.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAVRDisassembler.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAVRCodeGen.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAVRAsmParser.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAVRDesc.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAVRInfo.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMXCoreDisassembler.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMXCoreCodeGen.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMXCoreDesc.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMXCoreInfo.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMX86Disassembler.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMX86AsmParser.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMX86CodeGen.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMX86Desc.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMX86Utils.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMX86Info.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMWebAssemblyDisassembler.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMWebAssemblyCodeGen.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMWebAssemblyDesc.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMWebAssemblyAsmParser.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMWebAssemblyInfo.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSystemZDisassembler.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSystemZCodeGen.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSystemZAsmParser.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSystemZDesc.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSystemZInfo.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSparcDisassembler.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSparcCodeGen.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSparcAsmParser.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSparcDesc.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSparcInfo.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMRISCVDisassembler.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMRISCVCodeGen.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMRISCVAsmParser.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMRISCVDesc.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMRISCVUtils.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMRISCVInfo.a;/home/andy/dev/bo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y/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMInstCombine.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAggressiveInstCombine.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMTransformUtils.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMBitWriter.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAnalysis.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMProfileData.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMObject.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMTextAPI.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMBitReader.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMCore.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMRemarks.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMBitstreamReader.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAArch64AsmParser.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMMCParser.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAArch64Desc.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMMC.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMDebugInfoCodeView.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMDebugInfoMSF.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMBinaryFormat.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAArch64Utils.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMAArch64Info.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMSupport.a;/home/andy/dev/bootstrap-zig/out/arm-linux-musleabihf/lib/libLLVMDemangle.a  
-- Could NOT find clang (missing: CLANG_LIBRARIES CLANG_INCLUDE_DIRS) 
-- Could NOT find lld (missing: LLD_LIBRARIES LLD_INCLUDE_DIRS) 
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE  
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
CLANG_INCLUDE_DIRS (ADVANCED)
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
LLD_INCLUDE_DIRS (ADVANCED)
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig
   used as include directory in directory /home/andy/dev/bootstrap-zig/zig

[andrewrk]

Oops, that was a red herring. That actually caused Clang and LLD to not be built. So the only improvement is -DDLLVM_INCLUDE_UTILS=OFF. With that, we hit missing compiler-rt function, __clear_cache.

Next we apply ziglang/zig#4867

And next we get to actually a flaw in zig's self hosted code!

./src-self-hosted/translate_c.zig:3859:57: error: expected type 'usize', found 'u64'
    while (i < num_limbs) : (i += 1) big.limbs[i] = data[i];
                                                        ^
./src-self-hosted/translate_c.zig:3859:57: note: unsigned 32-bit int cannot represent all possible unsigned 64-bit values
    while (i < num_limbs) : (i += 1) big.limbs[i] = data[i];
                                                        ^
./src-self-hosted/translate_c.zig:960:28: note: referenced here
                break :blk try transCreateNodeAPInt(c, ZigClangEnumConstantDecl_getInitVal(enum_const));
                           ^
./lib/std/zig/system.zig:816:40: error: expected type 'usize', found 'u64'
            const len = file.pread(buf[i .. buf.len - i], offset + i) catch |err| switch (err) {
                                       ^
./lib/std/zig/system.zig:816:40: note: unsigned 32-bit int cannot represent all possible unsigned 64-bit values
            const len = file.pread(buf[i .. buf.len - i], offset + i) catch |err| switch (err) {
                                       ^
./lib/std/zig/system.zig:816:39: note: referenced here
            const len = file.pread(buf[i .. buf.len - i], offset + i) catch |err| switch (err) {
                                      ^
./lib/std/zig/system.zig:570:13: note: referenced here
        _ = try preadMin(file, &hdr_buf, 0, hdr_buf.len);
            ^

[andrewrk]

With ziglang/zig#4870 this is solved!