FreeBSD build fails unless I overwrite target name and add -Duse-zig-libcxx=true

[nunziotocci]

Zig Version

0.11.0-dev.809+b911b54ae

Steps to Reproduce and Observed Behavior

1. compile LLVM 15 from source and install to /home/nunzio/local/llvm15-release/
2. compile zstd from source and install to same prefix (not sure this actually matters, was trying to debug when I did this)
3. git clone https://github.com/ziglang/zig
4. cd zig
5. git checkout b911b54 (latest CI passed commit when I cloned)
6. mkdir build
7. cmake .. -DCMAKE_PREFIX_PATH=$HOME/local/llvm15-release -DCMAKE_INSTALL_PATH=$HOME/local/zig
8. make install

First got:

cd /home/nunzio/Repos/zig && /home/nunzio/Repos/zig/build/zig1 /home/nunzio/Repos/zig/lib build-exe src/main.zig -ofmt=c -lc -OReleaseSmall --name zig2 -femit-bin="/home/nunzio/Repos/zig/build/zig2.c" --
pkg-begin build_options /home/nunzio/Repos/zig/build/config.zig --pkg-end -target amd64-freebsd
error: UnknownArchitecture
[2/6] cd /home/nunzio/Repos/zig && /home/nunzio/Repos/zig/build/zig1 /home/nunzio/Repos/zig/lib build-obj lib/compiler_rt.zig -ofmt=c -OReleaseSmall --name compiler_rt -femit-bin="/home/nunzio/Repos/zig/
build/compiler_rt.c" --pkg-begin build_options /home/nunzio/Repos/zig/build/config.zig --pkg-end -target amd64-freebsd

Then after I forced the arch to be x86_64 I got:

[100%] Building stage3
error: ld.lld: undefined symbol: _Unwind_Resume
    note: referenced by cxxrt_exception.cc:0
    note:               cxxrt_exception.o:(alloc_or_die(unsigned long)) in archive /usr/lib/libc++.a
    note: referenced by cxxrt_exception.cc:0
    note:               cxxrt_exception.o:(__cxa_free_exception) in archive /usr/lib/libc++.a
    note: referenced by cxxrt_exception.cc:0
    note:               cxxrt_exception.o:(__cxa_begin_catch) in archive /usr/lib/libc++.a
    note: referenced 172 more times
error: ld.lld: undefined symbol: _Unwind_RaiseException
    note: referenced by cxxrt_exception.cc:768
    note:               cxxrt_exception.o:(__cxa_throw) in archive /usr/lib/libc++.a
    note: referenced by cxxrt_exception.cc:768
    note:               cxxrt_exception.o:(__cxa_rethrow_primary_exception) in archive /usr/lib/libc++.a
error: ld.lld: undefined symbol: _Unwind_Resume_or_Rethrow
    note: referenced by cxxrt_exception.cc:0
    note:               cxxrt_exception.o:(__cxa_rethrow) in archive /usr/lib/libc++.a
error: ld.lld: undefined symbol: _Unwind_Backtrace
    note: referenced by cxxrt_exception.cc:743
    note:               cxxrt_exception.o:(report_failure(_Unwind_Reason_Code, __cxxabiv1::__cxa_exception*)) in archive /usr/lib/libc++.a
error: ld.lld: undefined symbol: _Unwind_GetLanguageSpecificData
    note: referenced by cxxrt_exception.cc:1106
    note:               cxxrt_exception.o:(__gxx_personality_v0) in archive /usr/lib/libc++.a
error: ld.lld: undefined symbol: _Unwind_SetIP
    note: referenced by cxxrt_exception.cc:1203
    note:               cxxrt_exception.o:(__gxx_personality_v0) in archive /usr/lib/libc++.a
error: ld.lld: undefined symbol: _Unwind_SetGR
    note: referenced by cxxrt_exception.cc:1204
    note:               cxxrt_exception.o:(__gxx_personality_v0) in archive /usr/lib/libc++.a
    note: referenced by cxxrt_exception.cc:1206
    note:               cxxrt_exception.o:(__gxx_personality_v0) in archive /usr/lib/libc++.a
error: ld.lld: undefined symbol: _Unwind_GetRegionStart
    note: referenced by dwarf_eh.h:343 (/usr/src/contrib/libcxxrt/dwarf_eh.h:343)
    note:               cxxrt_exception.o:(parse_lsda(_Unwind_Context*, unsigned char*)) in archive /usr/lib/libc++.a
    note: referenced by dwarf_eh.h:273 (/usr/src/contrib/libcxxrt/dwarf_eh.h:273)
    note:               cxxrt_exception.o:(parse_lsda(_Unwind_Context*, unsigned char*)) in archive /usr/lib/libc++.a
    note: referenced by dwarf_eh.h:413 (/usr/src/contrib/libcxxrt/dwarf_eh.h:413)
    note:               cxxrt_exception.o:(dwarf_eh_find_callsite(_Unwind_Context*, dwarf_eh_lsda*, dwarf_eh_action*)) in archive /usr/lib/libc++.a
    note: referenced 1 more times
error: ld.lld: undefined symbol: _Unwind_GetTextRelBase
    note: referenced by dwarf_eh.h:267 (/usr/src/contrib/libcxxrt/dwarf_eh.h:267)
    note:               cxxrt_exception.o:(parse_lsda(_Unwind_Context*, unsigned char*)) in archive /usr/lib/libc++.a
    note: referenced by dwarf_eh.h:267 (/usr/src/contrib/libcxxrt/dwarf_eh.h:267)
    note:               cxxrt_exception.o:(get_type_info_entry(_Unwind_Context*, dwarf_eh_lsda*, int)) in archive /usr/lib/libc++.a
error: ld.lld: undefined symbol: _Unwind_GetDataRelBase
    note: referenced by dwarf_eh.h:270 (/usr/src/contrib/libcxxrt/dwarf_eh.h:270)
    note:               cxxrt_exception.o:(parse_lsda(_Unwind_Context*, unsigned char*)) in archive /usr/lib/libc++.a
    note: referenced by dwarf_eh.h:270 (/usr/src/contrib/libcxxrt/dwarf_eh.h:270)
    note:               cxxrt_exception.o:(get_type_info_entry(_Unwind_Context*, dwarf_eh_lsda*, int)) in archive /usr/lib/libc++.a
error: ld.lld: undefined symbol: _Unwind_GetIP
    note: referenced by dwarf_eh.h:413 (/usr/src/contrib/libcxxrt/dwarf_eh.h:413)
    note:               cxxrt_exception.o:(dwarf_eh_find_callsite(_Unwind_Context*, dwarf_eh_lsda*, dwarf_eh_action*)) in archive /usr/lib/libc++.a
    note: referenced by cxxrt_exception.cc:675
    note:               cxxrt_exception.o:(trace(_Unwind_Context*, void*)) in archive /usr/lib/libc++.a
error: zig...
error: The following command exited with error code 1:
/usr/home/nunzio/Repos/zig/build/zig2 build-exe --stack 33554432 /usr/home/nunzio/Repos/zig/src/main.zig -lc /home/nunzio/Repos/zig/build/zigcpp/libzigcpp.a /home/nunzio/local/llvm15-release/lib/libclangFrontendTool.a /home/nunzio/local/llvm15-release/lib/libclangCodeGen.a /home/nunzio/local/llvm15-release/lib
/libclangFrontend.a /home/nunzio/local/llvm15-release/lib/libclangDriver.a /home/nunzio/local/llvm15-release/lib/libclangSerialization.a /home/nunzio/local/llvm15-release/lib/libclangSema.a /home/nunzio/local/llvm15-release/lib/libclangStaticAnalyzerFrontend.a /home/nunzio/local/llvm15-release/lib/libclangStat
icAnalyzerCheckers.a /home/nunzio/local/llvm15-release/lib/libclangStaticAnalyzerCore.a /home/nunzio/local/llvm15-release/lib/libclangAnalysis.a /home/nunzio/local/llvm15-release/lib/libclangASTMatchers.a /home/nunzio/local/llvm15-release/lib/libclangAST.a /home/nunzio/local/llvm15-release/lib/libclangParse.a
/home/nunzio/local/llvm15-release/lib/libclangSema.a /home/nunzio/local/llvm15-release/lib/libclangBasic.a /home/nunzio/local/llvm15-release/lib/libclangEdit.a /home/nunzio/local/llvm15-release/lib/libclangLex.a /home/nunzio/local/llvm15-release/lib/libclangARCMigrate.a /home/nunzio/local/llvm15-release/lib/li
bclangRewriteFrontend.a /home/nunzio/local/llvm15-release/lib/libclangRewrite.a /home/nunzio/local/llvm15-release/lib/libclangCrossTU.a /home/nunzio/local/llvm15-release/lib/libclangIndex.a /home/nunzio/local/llvm15-release/lib/libclangToolingCore.a /home/nunzio/local/llvm15-release/lib/libclangExtractAPI.a /h
ome/nunzio/local/llvm15-release/lib/libclangSupport.a /usr/local/lib/libunwind.so /home/nunzio/local/llvm15-release/lib/liblldMinGW.a /home/nunzio/local/llvm15-release/lib/liblldELF.a /home/nunzio/local/llvm15-release/lib/liblldCOFF.a /home/nunzio/local/llvm15-release/lib/liblldWasm.a /home/nunzio/local/llvm15
-release/lib/liblldMachO.a /home/nunzio/local/llvm15-release/lib/liblldCommon.a -lLLVMWindowsManifest -lLLVMWindowsDriver -lLLVMXRay -lLLVMLibDriver -lLLVMDlltoolDriver -lLLVMCoverage -lLLVMLineEditor -lLLVMXCoreDisassembler -lLLVMXCoreCodeGen -lLLVMXCoreDesc -lLLVMXCoreInfo -lLLVMX86TargetMCA -lLLVMX86Disasse
mbler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Info -lLLVMWebAssemblyDisassembler -lLLVMWebAssemblyAsmParser -lLLVMWebAssemblyCodeGen -lLLVMWebAssemblyDesc -lLLVMWebAssemblyUtils -lLLVMWebAssemblyInfo -lLLVMVEDisassembler -lLLVMVEAsmParser -lLLVMVECodeGen -lLLVMVEDesc -lLLVMVEInfo -lLLVMSyste
mZDisassembler -lLLVMSystemZAsmParser -lLLVMSystemZCodeGen -lLLVMSystemZDesc -lLLVMSystemZInfo -lLLVMSparcDisassembler -lLLVMSparcAsmParser -lLLVMSparcCodeGen -lLLVMSparcDesc -lLLVMSparcInfo -lLLVMRISCVDisassembler -lLLVMRISCVAsmParser -lLLVMRISCVCodeGen -lLLVMRISCVDesc -lLLVMRISCVInfo -lLLVMPowerPCDisassemble
r -lLLVMPowerPCAsmParser -lLLVMPowerPCCodeGen -lLLVMPowerPCDesc -lLLVMPowerPCInfo -lLLVMNVPTXCodeGen -lLLVMNVPTXDesc -lLLVMNVPTXInfo -lLLVMMSP430Disassembler -lLLVMMSP430AsmParser -lLLVMMSP430CodeGen -lLLVMMSP430Desc -lLLVMMSP430Info -lLLVMMipsDisassembler -lLLVMMipsAsmParser -lLLVMMipsCodeGen -lLLVMMipsDesc -
lLLVMMipsInfo -lLLVMLanaiDisassembler -lLLVMLanaiCodeGen -lLLVMLanaiAsmParser -lLLVMLanaiDesc -lLLVMLanaiInfo -lLLVMHexagonDisassembler -lLLVMHexagonCodeGen -lLLVMHexagonAsmParser -lLLVMHexagonDesc -lLLVMHexagonInfo -lLLVMBPFDisassembler -lLLVMBPFAsmParser -lLLVMBPFCodeGen -lLLVMBPFDesc -lLLVMBPFInfo -lLLVMAVR
Disassembler -lLLVMAVRAsmParser -lLLVMAVRCodeGen -lLLVMAVRDesc -lLLVMAVRInfo -lLLVMARMDisassembler -lLLVMARMAsmParser -lLLVMARMCodeGen -lLLVMARMDesc -lLLVMARMUtils -lLLVMARMInfo -lLLVMAMDGPUTargetMCA -lLLVMAMDGPUDisassembler -lLLVMAMDGPUAsmParser -lLLVMAMDGPUCodeGen -lLLVMAMDGPUDesc -lLLVMAMDGPUUtils -lLLVMAMD
GPUInfo -lLLVMAArch64Disassembler -lLLVMAArch64AsmParser -lLLVMAArch64CodeGen -lLLVMAArch64Desc -lLLVMAArch64Utils -lLLVMAArch64Info -lLLVMOrcJIT -lLLVMMCJIT -lLLVMJITLink -lLLVMInterpreter -lLLVMExecutionEngine -lLLVMRuntimeDyld -lLLVMOrcTargetProcess -lLLVMOrcShared -lLLVMDWP -lLLVMDebugInfoGSYM -lLLVMOption
 -lLLVMObjectYAML -lLLVMObjCopy -lLLVMMCA -lLLVMMCDisassembler -lLLVMLTO -lLLVMPasses -lLLVMCFGuard -lLLVMCoroutines -lLLVMObjCARCOpts -lLLVMipo -lLLVMVectorize -lLLVMLinker -lLLVMInstrumentation -lLLVMFrontendOpenMP -lLLVMFrontendOpenACC -lLLVMExtensions -lLLVMDWARFLinker -lLLVMGlobalISel -lLLVMMIRParser -lLL
VMAsmPrinter -lLLVMSelectionDAG -lLLVMCodeGen -lLLVMIRReader -lLLVMAsmParser -lLLVMInterfaceStub -lLLVMFileCheck -lLLVMFuzzMutate -lLLVMTarget -lLLVMScalarOpts -lLLVMInstCombine -lLLVMAggressiveInstCombine -lLLVMTransformUtils -lLLVMBitWriter -lLLVMAnalysis -lLLVMProfileData -lLLVMSymbolize -lLLVMDebugInfoPDB
-lLLVMDebugInfoMSF -lLLVMDebugInfoDWARF -lLLVMObject -lLLVMTextAPI -lLLVMMCParser -lLLVMMC -lLLVMDebugInfoCodeView -lLLVMBitReader -lLLVMFuzzerCLI -lLLVMCore -lLLVMRemarks -lLLVMBitstreamReader -lLLVMBinaryFormat -lLLVMTableGen -lLLVMSupport -lLLVMDemangle -lexecinfo -lz -lzstd /usr/lib/libc++.a --cache-dir /u
sr/home/nunzio/Repos/zig/zig-cache --global-cache-dir /home/nunzio/.cache/zig --name zig --pkg-begin build_options /usr/home/nunzio/Repos/zig/zig-cache/options/pRUwb64kQ9rYUb_EvqOgdRXgZ3UiddVBn40G4Nc62Zyqg2-axylVF1dPUXoFpD_a --pkg-end -I /home/nunzio/local/llvm15-release/include -I /usr/home/nunzio/local/llvm1
5-release/include -L /usr/home/nunzio/local/llvm15-release/lib -L /home/nunzio/local/llvm15-release/lib -I /home/nunzio/local/llvm15-release/include -fno-build-id --zig-lib-dir /home/nunzio/Repos/zig/lib --enable-cache
error: the following build command failed with exit code 1:
/usr/home/nunzio/Repos/zig/zig-cache/o/5d43b86d4d88e3525c2120de4d7b1954/build /usr/home/nunzio/Repos/zig/build/zig2 /usr/home/nunzio/Repos/zig /usr/home/nunzio/Repos/zig/zig-cache /home/nunzio/.cache/zig compile --zig-lib-dir /home/nunzio/Repos/zig/lib -Dconfig_h=/home/nunzio/Repos/zig/build/config.h -Denable-
llvm -Dtarget=native -Dcpu=native -Dversion-string=0.11.0-dev.809+b911b54ae

Expected Behavior

I expected it to build. My solution:

1. nano CMakeFiles/zig2.dir/build.make (replace amd64 with x86_65)
2. nano ./CMakeFiles/stage3.dir/build.make (add -Duse-zig-libcxx=true to build compile line)
3. nano cmake_install.cmake add -Duse-zig-libcxx=true to ZIG_BUILD_ARGS
4. make install

Here's my uname -a:

FreeBSD <host> 13.1-RELEASE FreeBSD 13.1-RELEASE releng/13.1-n250148-fc952ac2212 GENERIC amd64

Looking forward to playing with zig, thank you for all of the hard work!

[nunziotocci]

Update: I tried to use https://github.com/ratfactor/ziglings to get started with learning zig and discovered I have a non-funcitonal build:

nunzio@smtp:~/Repos
$ git clone https://github.com/ratfactor/ziglings
Cloning into 'ziglings'...
remote: Enumerating objects: 1814, done.
remote: Counting objects: 100% (49/49), done.
remote: Compressing objects: 100% (31/31), done.
remote: Total 1814 (delta 22), reused 32 (delta 18), pack-reused 1765
Receiving objects: 100% (1814/1814), 353.62 KiB | 2.31 MiB/s, done.
Resolving deltas: 100% (1162/1162), done.

nunzio@smtp:~/Repos
$ cd ziglings/

nunzio@smtp:~/Repos/ziglings
$ zig build
thread 101674 panic: incorrect alignment
/home/nunzio/Repos/zig/lib/std/heap.zig:185:65: 0x404897e in rawCAlloc (zig)
    const ptr = @alignCast(@alignOf(std.c.max_align_t), c.malloc(len));
                                                                ^
/home/nunzio/Repos/zig/lib/std/mem/Allocator.zig:86:34: 0x40a9e47 in allocAdvancedWithRetAddr__anon_6144 (zig)
    return self.vtable.alloc(self.ptr, len, ptr_align, ret_addr);
                                 ^
/home/nunzio/Repos/zig/lib/std/mem/Allocator.zig:128:41: 0x4049fa5 in alloc__anon_3428 (zig)
    return self.allocAdvancedWithRetAddr(T, null, n, @returnAddress());
                                        ^
/home/nunzio/Repos/zig/lib/std/mem/Allocator.zig:308:45: 0x4049e58 in dupe__anon_3427 (zig)
    const new_buf = try allocator.alloc(T, m.len);
                                            ^
/usr/home/nunzio/Repos/zig/src/Package.zig:63:40: 0x40ccedf in createWithDir (zig)
    const owned_src_path = try gpa.dupe(u8, root_src_path);
                                       ^
/usr/home/nunzio/Repos/zig/src/Compilation.zig:1590:24: 0x40f9695 in create (zig)
                options.zig_lib_directory,
                       ^
/usr/home/nunzio/Repos/zig/src/main.zig:4015:61: 0x4074bd9 in cmdBuild (zig)
            .dynamic_linker = target_info.dynamic_linker.get(),
                                                            ^
/usr/home/nunzio/Repos/zig/src/main.zig:288:24: 0x4046c0e in mainArgs (zig)
        return cmdBuild(gpa, arena, cmd_args);
                       ^
/usr/home/nunzio/Repos/zig/src/main.zig:201:20: 0x40457d7 in main (zig)
    return mainArgs(gpa, arena, args);
                   ^
/home/nunzio/Repos/zig/lib/std/start.zig:614:37: 0x4047e38 in main (zig)
            const result = root.main() catch |err| {
                                    ^
/usr/src/lib/csu/amd64/crt1_c.c:75:7: 0x4043b7f in _start (/usr/src/lib/csu/amd64/crt1_c.c)
        exit(main(argc, argv, env));
      ^
???:?:?: 0x80bdca007 in ??? (???)
Abort trap (core dumped)

If I use the stage2 compiler, it appears to work (I get the first error message that I'm supposed to fix).

[mikdusan]

see #13699

I'm holding off pushing a rebase of the PR until I work out linking system c++ standard library for stage3 for more than just FreeBSD.

btw,

• unknown arch; solved in PR commit cmake: CMAKE_HOST_SYSTEM_PROCESSOR ignore case
• panic incorrect alignment; solved in a commit I haven't pushed to the PR yet; fixes std.heap.rawCAlloc

[nunziotocci]

Thanks for the heads up, I've subscribed to your PR. I'll re-check this once it's merged.

[nunziotocci]

Now that #13699 is merged I will give this another try when I get a chance. Thank you @mikdusan!

[nunziotocci]

Both of my issues are resolved in master, thanks again!