Cross compile build error from mac aarch64 to windows x86_64

[tbillington]

Heya, apologies if this isn't the correct repo to open this, still figuring out how the build process works. It could also be in xwin or luau.

When building a binary for x86_64-pc-windows-msvc from aarch64-apple-darwin I get a number of errors that from what I can find online indicate the use of c++ features that the compiler doesn't support/hasn't got enabled. I'm running on Homebrew clang version 17.0.4. Is this something coming from the way luau is being vendored?

error: no template named 'optional' in namespace 'std'
(full error line)

warning: In file included from /Users/choc/.cargo/registry/src/index.crates.io-6f17d22bba15001f/luau0-src-0.7.8+luau601/luau/Ast/src/Ast.cpp:2:
warning: /Users/choc/.cargo/registry/src/index.crates.io-6f17d22bba15001f/luau0-src-0.7.8+luau601/luau/Ast/include/Luau/Ast.h(376,46): error: no template named 'optional' in namespace 'std'
warning:   376 |         const AstName& debugname, const std::optional<AstTypeList>& returnAnnotation = {}, AstTypePack* varargAnnotation = nullptr,
warning:       |                                         ~~~~~^

...

error: failed to run custom build command for `mlua-sys v0.3.2`

Caused by:
  process didn't exit successfully: `/Users/choc/code/driving/target/debug/build/mlua-sys-086b5f599c374c51/build-script-main` (exit status: 1)
  --- stdout
  cargo:rerun-if-changed=build
  cargo:rerun-if-env-changed=CXX_x86_64-pc-windows-msvc
  CXX_x86_64-pc-windows-msvc = None
  cargo:rerun-if-env-changed=CXX_x86_64_pc_windows_msvc
  CXX_x86_64_pc_windows_msvc = Some("clang-cl")
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  CARGO_CFG_TARGET_FEATURE = Some("fxsr,sse,sse2")
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-pc-windows-msvc
  CXXFLAGS_x86_64-pc-windows-msvc = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_pc_windows_msvc
  CXXFLAGS_x86_64_pc_windows_msvc = Some("--target=x86_64-pc-windows-msvc -Wno-unused-command-line-argument -fuse-ld=lld-link /imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/crt/include /imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/sdk/include/ucrt /imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/sdk/include/um /imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/sdk/include/shared  ")
  cargo:rerun-if-env-changed=CXX_x86_64-pc-windows-msvc
  CXX_x86_64-pc-windows-msvc = None
  cargo:rerun-if-env-changed=CXX_x86_64_pc_windows_msvc
  CXX_x86_64_pc_windows_msvc = Some("clang-cl")
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  CARGO_CFG_TARGET_FEATURE = Some("fxsr,sse,sse2")
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-pc-windows-msvc
  CXXFLAGS_x86_64-pc-windows-msvc = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_pc_windows_msvc
  CXXFLAGS_x86_64_pc_windows_msvc = Some("--target=x86_64-pc-windows-msvc -Wno-unused-command-line-argument -fuse-ld=lld-link /imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/crt/include /imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/sdk/include/ucrt /imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/sdk/include/um /imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/sdk/include/shared  ")
  running: "clang-cl" "-nologo" "-MD" "-O2" "-Z7" "-Brepro" "-m64" "--target=x86_64-pc-windows-msvc" "-Wno-unused-command-line-argument" "-fuse-ld=lld-link" "/imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/crt/include" "/imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/sdk/include/ucrt" "/imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/sdk/include/um" "/imsvc/Users/choc/Library/Caches/cargo-xwin/xwin/sdk/include/shared" "-I" "/Users/choc/.cargo/registry/src/index.crates.io-6f17d22bba15001f/luau0-src-0.7.8+luau601/luau/Ast/include" "-I" "/Users/choc/.cargo/registry/src/index.crates.io-6f17d22bba15001f/luau0-src-0.7.8+luau601/luau/Common/include" "-DLUAI_MAXCSTACK=100000" "-DLUA_VECTOR_SIZE=3" "-Fo/Users/choc/code/driving/target/x86_64-pc-windows-msvc/debug/build/mlua-sys-bc87202e190734b8/out/luau-build/lib/1650a0a9048e3136-Ast.o" "-c" "--" "/Users/choc/.cargo/registry/src/index.crates.io-6f17d22bba15001f/luau0-src-0.7.8+luau601/luau/Ast/src/Ast.cpp"

[khvzak]

I'll take a look! What x86_64-pc-windows-msvc toolchain do you use?

[tbillington]

I was trying with xwin, cargo xwin build --target=x86_64-pc-windows-msvc. Not for any particular reason though