MacOS Support

[HomuHomu833]

Need proper osxcross knowledge to apply the macOS SDK to Zig.

[HomuHomu833]

Current known info:
ziglang/zig#1349 (comment)

[HomuHomu833]

current issue is libobjc.A.dylib not getting found but it... doesn't exist? very strange and also this dylib do exist in iOS SDK but probably not gonna work under macOS build.

log:

FAILED: [code=1] bin/dsymutil 
: && /Users/runner/work/llvm-custom-experimental/llvm-custom-experimental/zig-as-llvm/bin/c++ -F/Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks -Wno-elaborated-enum-base -fstack-protector-strong -fsanitize=undefined -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -Os -DNDEBUG -arch arm64 -isysroot /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -mmacosx-version-min=13.0 -Wl,-headerpad_max_install_names  -fno-pie -Wl,--color-diagnostics  -Wl,-dead_strip tools/dsymutil/CMakeFiles/dsymutil.dir/dsymutil.cpp.o tools/dsymutil/CMakeFiles/dsymutil.dir/BinaryHolder.cpp.o tools/dsymutil/CMakeFiles/dsymutil.dir/CFBundle.cpp.o tools/dsymutil/CMakeFiles/dsymutil.dir/DebugMap.cpp.o tools/dsymutil/CMakeFiles/dsymutil.dir/DwarfLinkerForBinary.cpp.o tools/dsymutil/CMakeFiles/dsymutil.dir/MachODebugMapParser.cpp.o tools/dsymutil/CMakeFiles/dsymutil.dir/MachOUtils.cpp.o tools/dsymutil/CMakeFiles/dsymutil.dir/Reproducer.cpp.o tools/dsymutil/CMakeFiles/dsymutil.dir/RelocationMap.cpp.o tools/dsymutil/CMakeFiles/dsymutil.dir/dsymutil-driver.cpp.o -o bin/dsymutil  lib/libLLVMX86CodeGen.a  lib/libLLVMAArch64CodeGen.a  lib/libLLVMARMCodeGen.a  lib/libLLVMRISCVCodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMAArch64Desc.a  lib/libLLVMARMDesc.a  lib/libLLVMRISCVDesc.a  lib/libLLVMX86Info.a  lib/libLLVMAArch64Info.a  lib/libLLVMARMInfo.a  lib/libLLVMRISCVInfo.a  lib/libLLVMAsmPrinter.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMDWARFLinker.a  lib/libLLVMDWARFLinkerClassic.a  lib/libLLVMDWARFLinkerParallel.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMMC.a  lib/libLLVMObject.a  lib/libLLVMOption.a  lib/libLLVMRemarks.a  lib/libLLVMSupport.a  lib/libLLVMTarget.a  lib/libLLVMTargetParser.a  -framework CoreFoundation  lib/libLLVMIRPrinter.a  lib/libLLVMAArch64Utils.a  lib/libLLVMMCDisassembler.a  lib/libLLVMCFGuard.a  lib/libLLVMARMUtils.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMipo.a  lib/libLLVMInstrumentation.a  lib/libLLVMVectorize.a  lib/libLLVMSandboxIR.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMFrontendAtomic.a  lib/libLLVMLinker.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMCGData.a  lib/libLLVMBitWriter.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMTransformUtils.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMMCParser.a  lib/libLLVMIRReader.a  lib/libLLVMBitReader.a  lib/libLLVMAsmParser.a  lib/libLLVMCore.a  lib/libLLVMBitstreamReader.a  lib/libLLVMTextAPI.a  lib/libLLVMBinaryFormat.a  -lm  /Users/runner/work/llvm-custom-experimental/llvm-custom-experimental/output/aarch64-macos-none/lib/libz.a  /Users/runner/work/llvm-custom-experimental/llvm-custom-experimental/output/aarch64-macos-none/lib/libzstd.a  lib/libLLVMDemangle.a && :
error: unable to resolve dependency
    note: while resolving /usr/lib/libobjc.A.dylib
    note: a dependency of /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation.tbd
    note: tried /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/libobjc.A.framework/libobjc.A.tbd
    note: tried /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/libobjc.A.framework/libobjc.A.dylib
    note: tried /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/libobjc.A.framework/libobjc.A
    note: tried /usr/lib/libobjc.A.tbd
    note: tried /usr/lib/libobjc.A.dylib
    note: tried /usr/lib/libobjc.A
    note: tried /usr/lib/libobjc.A.dylib
error: unable to resolve dependency
    note: while parsing /usr/lib/libobjc.A.dylib
    note: a dependency of /Applications/Xcode_16.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation.tbd
ninja: build stopped: subcommand failed.

[HomuHomu833]

cannot use Zig's LLVM backend as -fuse-ld being unavailable and -ObjC flag does absouletly nothing, might use Apple's compiler stuff

[HomuHomu833]

Cancelling because the arm64 build fails (LLVM can’t find zlib’s compress2 function). Upon further inspection of the Android NDK binaries, the minimum requirement for Clang is macOS Mojave on x86_64 and macOS Big Sur on arm64, so there’s no need to build it.