Unable to build Ladybird on Apple Silicon MacOS 15.5

[jmarkel]

Summary

When I try to build Ladybird it fails. It knows it's on arm64 (Apple M4 Pro) but halts with "Undefined symbols for architecture x86_64"

Operating system

macOS

Steps to reproduce

1. Installed prereqs per README: xcode-select --install brew install autoconf autoconf-archive automake ccache cmake nasm ninja pkg-config Also brew install llvm@20 and brew install qt
2. Ran ./Meta/ladybird.py run - failed
3. Ran arch -arm64 ./Meta/ladybird.py run - failed
4. Set up to use clan: export BUILD_PRESET=Debug export CC=$(brew --prefix llvm)/bin/clang export CXX=$(brew --prefix llvm)/bin/clang++
5. Ran ./Meta/ladybird.py run - failed
6. Ran arch -arm64 ./Meta/ladybird.py run - failed
7. did 'git fetch --all; git pull' and re-tried above steps 2-6 - still failed

Expected behavior

Expected Ladybird to successfully build and run

Actual behavior

Build failed

URL for a reduced test case

N/A

HTML/SVG/etc. source for a reduced test case

N/A

Log output and (if possible) backtrace

...

-- Build files have been written to: /Users/jeff/Git/ladybird/Build/debug
[42/3450] Linking CXX shared library lib/liblagom-ak.0.0.0.dylib
FAILED: lib/liblagom-ak.0.0.0.dylib
: && /usr/bin/c++ -g -arch x86_64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -mmacosx-version-min=14.0 -dynamiclib -Wl,-headerpad_max_install_names -fstack-protector-strong -Xlinker -U -Xlinker _ak_assertion_handler -o lib/liblagom-ak.0.0.0.dylib -install_name @rpath/liblagom-ak.0.dylib Lagom/AK/CMakeFiles/AK.dir/Assertions.cpp.o Lagom/AK/CMakeFiles/AK.dir/Base64.cpp.o Lagom/AK/CMakeFiles/AK.dir/ByteString.cpp.o Lagom/AK/CMakeFiles/AK.dir/ByteStringImpl.cpp.o Lagom/AK/CMakeFiles/AK.dir/CircularBuffer.cpp.o Lagom/AK/CMakeFiles/AK.dir/ConstrainedStream.cpp.o Lagom/AK/CMakeFiles/AK.dir/CountingStream.cpp.o Lagom/AK/CMakeFiles/AK.dir/Error.cpp.o Lagom/AK/CMakeFiles/AK.dir/FloatingPointStringConversions.cpp.o Lagom/AK/CMakeFiles/AK.dir/FlyString.cpp.o Lagom/AK/CMakeFiles/AK.dir/Format.cpp.o Lagom/AK/CMakeFiles/AK.dir/GenericLexer.cpp.o Lagom/AK/CMakeFiles/AK.dir/Hex.cpp.o Lagom/AK/CMakeFiles/AK.dir/JsonArray.cpp.o Lagom/AK/CMakeFiles/AK.dir/JsonObject.cpp.o Lagom/AK/CMakeFiles/AK.dir/JsonParser.cpp.o Lagom/AK/CMakeFiles/AK.dir/JsonValue.cpp.o Lagom/AK/CMakeFiles/AK.dir/MemoryStream.cpp.o Lagom/AK/CMakeFiles/AK.dir/NumberFormat.cpp.o Lagom/AK/CMakeFiles/AK.dir/OptionParser.cpp.o Lagom/AK/CMakeFiles/AK.dir/Random.cpp.o Lagom/AK/CMakeFiles/AK.dir/StackInfo.cpp.o Lagom/AK/CMakeFiles/AK.dir/Stream.cpp.o Lagom/AK/CMakeFiles/AK.dir/String.cpp.o Lagom/AK/CMakeFiles/AK.dir/StringBase.cpp.o Lagom/AK/CMakeFiles/AK.dir/StringBuilder.cpp.o Lagom/AK/CMakeFiles/AK.dir/StringFloatingPointConversions.cpp.o Lagom/AK/CMakeFiles/AK.dir/StringUtils.cpp.o Lagom/AK/CMakeFiles/AK.dir/StringView.cpp.o Lagom/AK/CMakeFiles/AK.dir/Time.cpp.o Lagom/AK/CMakeFiles/AK.dir/Utf16View.cpp.o Lagom/AK/CMakeFiles/AK.dir/Utf32View.cpp.o Lagom/AK/CMakeFiles/AK.dir/Utf8View.cpp.o Lagom/AK/CMakeFiles/AK.dir/kmalloc.cpp.o Lagom/AK/CMakeFiles/AK.dir/LexicalPath.cpp.o  -Wl,-rpath,/Users/jeff/Git/ladybird/Build/debug/vcpkg_installed/arm64-osx-dynamic/debug/lib  vcpkg_installed/arm64-osx-dynamic/debug/lib/libsimdutf.21.0.0.dylib && :
ld: warning: ignoring file 'vcpkg_installed/arm64-osx-dynamic/debug/lib/libsimdutf.21.0.0.dylib': found architecture 'arm64', required architecture 'x86_64'
Undefined symbols for architecture x86_64:
  "simdutf::count_utf8(char const*, unsigned long)", referenced from:
      AK::utf8_to_utf16(AK::Utf8View const&, AK::Endianness) in Utf16View.cpp.o
      AK::Utf8View::calculate_length() const in Utf8View.cpp.o
      AK::Utf8View::starts_with(AK::Utf8View const&) const in Utf8View.cpp.o
      AK::Utf8View::starts_with(AK::Utf8View const&) const in Utf8View.cpp.o
  "simdutf::count_utf16(char16_t const*, unsigned long)", referenced from:
      AK::Utf16View::length_in_code_points() const in Utf16View.cpp.o
      AK::Utf16View::calculate_length_in_code_points() const in Utf16View.cpp.o
  "simdutf::validate_ascii(char const*, unsigned long)", referenced from:
      AK::StringView::is_ascii() const in StringView.cpp.o
  "simdutf::validate_utf16(char16_t const*, unsigned long)", referenced from:
      AK::Utf16View::length_in_code_points() const in Utf16View.cpp.o
      AK::Utf16View::calculate_length_in_code_points() const in Utf16View.cpp.o
      AK::Utf16View::validate() const in Utf16View.cpp.o
  "simdutf::binary_to_base64(char const*, unsigned long, char*, simdutf::base64_options)", referenced from:
      AK::encode_base64_impl(AK::StringView, simdutf::base64_options) in Base64.cpp.o
  "simdutf::validate_utf16be(char16_t const*, unsigned long)", referenced from:
      AK::validate_utf16_be(AK::Span<unsigned char const>) in Utf16View.cpp.o
  "simdutf::validate_utf16le(char16_t const*, unsigned long)", referenced from:
      AK::validate_utf16_le(AK::Span<unsigned char const>) in Utf16View.cpp.o
  "simdutf::base64_to_binary_safe(char const*, unsigned long, char*, unsigned long&, simdutf::base64_options, simdutf::last_chunk_handling_options, bool)", referenced from:
      AK::decode_base64_into_impl(AK::StringView, AK::Detail::ByteBuffer<32ul>&, AK::LastChunkHandling, simdutf::base64_options) in Base64.cpp.o
  "simdutf::convert_utf16_to_utf8(char16_t const*, unsigned long, char*)", referenced from:
      AK::String::from_utf16(AK::Utf16View const&) in String.cpp.o
  "simdutf::convert_utf8_to_utf16(char const*, unsigned long, char16_t*)", referenced from:
      AK::utf8_to_utf16(AK::Utf8View const&, AK::Endianness) in Utf16View.cpp.o
  "simdutf::convert_utf32_to_utf16(char32_t const*, unsigned long, char16_t*)", referenced from:
      AK::utf32_to_utf16(AK::Utf32View const&, AK::Endianness) in Utf16View.cpp.o
  "simdutf::utf16_length_from_utf8(char const*, unsigned long)", referenced from:
      AK::utf8_to_utf16(AK::Utf8View const&, AK::Endianness) in Utf16View.cpp.o
      AK::utf16_code_unit_length_from_utf8(AK::StringView) in Utf16View.cpp.o
  "simdutf::utf8_length_from_utf16(char16_t const*, unsigned long)", referenced from:
      AK::String::from_utf16_le(AK::Span<unsigned char const>) in String.cpp.o
      AK::String::from_utf16_be(AK::Span<unsigned char const>) in String.cpp.o
      AK::String::from_utf16(AK::Utf16View const&) in String.cpp.o
      AK::StringBuilder::try_append(AK::Utf16View const&) in StringBuilder.cpp.o
  "simdutf::convert_utf16be_to_utf8(char16_t const*, unsigned long, char*)", referenced from:
      AK::String::from_utf16_be(AK::Span<unsigned char const>) in String.cpp.o
  "simdutf::convert_utf16le_to_utf8(char16_t const*, unsigned long, char*)", referenced from:
      AK::String::from_utf16_le(AK::Span<unsigned char const>) in String.cpp.o
  "simdutf::convert_utf8_to_utf16be(char const*, unsigned long, char16_t*)", referenced from:
      AK::utf8_to_utf16(AK::Utf8View const&, AK::Endianness) in Utf16View.cpp.o
  "simdutf::convert_utf8_to_utf16le(char const*, unsigned long, char16_t*)", referenced from:
      AK::utf8_to_utf16(AK::Utf8View const&, AK::Endianness) in Utf16View.cpp.o
  "simdutf::utf16_length_from_utf32(char32_t const*, unsigned long)", referenced from:
      AK::utf32_to_utf16(AK::Utf32View const&, AK::Endianness) in Utf16View.cpp.o
  "simdutf::convert_utf32_to_utf16be(char32_t const*, unsigned long, char16_t*)", referenced from:
      AK::utf32_to_utf16(AK::Utf32View const&, AK::Endianness) in Utf16View.cpp.o
  "simdutf::convert_utf32_to_utf16le(char32_t const*, unsigned long, char16_t*)", referenced from:
      AK::utf32_to_utf16(AK::Utf32View const&, AK::Endianness) in Utf16View.cpp.o
  "simdutf::base64_length_from_binary(unsigned long, simdutf::base64_options)", referenced from:
      AK::encode_base64_impl(AK::StringView, simdutf::base64_options) in Base64.cpp.o
  "simdutf::validate_utf8_with_errors(char const*, unsigned long)", referenced from:
      AK::Utf8View::validate(unsigned long&, AK::Utf8View::AllowSurrogates) const in Utf8View.cpp.o
  "simdutf::validate_utf16_with_errors(char16_t const*, unsigned long)", referenced from:
      AK::Utf16View::validate(unsigned long&) const in Utf16View.cpp.o
  "simdutf::convert_utf16_to_utf8_with_errors(char16_t const*, unsigned long, char*)", referenced from:
      AK::StringBuilder::try_append(AK::Utf16View const&) in StringBuilder.cpp.o
  "simdutf::maximal_binary_length_from_base64(char const*, unsigned long)", referenced from:
      AK::size_required_to_decode_base64(AK::StringView) in Base64.cpp.o
      AK::decode_base64_impl(AK::StringView, AK::LastChunkHandling, simdutf::base64_options) in Base64.cpp.o
ld: symbol(s) not found for architecture x86_64
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
[55/3450] Building CXX object Lagom/Tools/CodeGenerators/LibTextCodec/CMakeFiles/GenerateEncodingIndexes.dir/GenerateEncodingIndexes.cpp.o
ninja: build stopped: subcommand failed.

Screenshots or screen recordings

No response

Build flags or config settings

Tried both without and with arch -arm64

Contribute a patch?

• [ ] I’ll contribute a patch for this myself.

[ADKaster]

Is your homebrew configured to build for Rosetta2 by default or something? You should clear out any environment variables or other such config to get a consistent build environment. I wouldn't recommend using that arch command at all these days... At any rate, you'll probably have to blast your build dir to get all the misconfigured libs out of the way.

[jmarkel]

I do have Rosetta2 installed. But that should be irrelevant. I'm building from scratch on an ARM-based system, not using an x86 binary

[ADKaster]

That makes sense, but in your posted build output, something was adding -arch x86_64

[42/3450] Linking CXX shared library lib/liblagom-ak.0.0.0.dylib
FAILED: lib/liblagom-ak.0.0.0.dylib
: && /usr/bin/c++ -g -arch x86_64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk 

Figuring out where that is coming from is going to be the solution to your issue

[jmarkel]

Yes, that's exactly my point. There's no rational reason for the build process to be using -arch x86_64 when the rest of the build is happening with -arch arm64.

I.e. there's a bug - which is what I'm reporting here.

[KipHamiltons]

Can you post your environment variables @jmarkel ? I don't have the issue on M1

[BertalanD]

Is your shell or CMake executable an x86_64 binary by any chance?