macos cross compile eigen unary build failure

[wsmoses]

2026-01-27T03:10:22.7904990Z �[0m�[1m[03:10:22] �[22m�[31m[1,269 / 10,580] Compiling xla/codegen/intrinsic/cpp/eigen_unary.cc; 3s processwrapper-sandbox ... (128 actions, 127 running)�[39m
2026-01-27T03:10:23.8645166Z �[0m�[1m[03:10:23] �[22m�[31m[1,327 / 10,580] Compiling xla/codegen/intrinsic/cpp/eigen_unary.cc; 4s processwrapper-sandbox ... (128 actions, 126 running)�[39m
2026-01-27T03:10:24.6349760Z �[0m�[1m[03:10:24] �[22m�[31mERROR: /workspace/bazel_root/097636303b1142f44508c1d8e3494e4b/external/xla/xla/codegen/intrinsic/cpp/BUILD:89:13: Compiling xla/codegen/intrinsic/cpp/eigen_unary.cc failed: (Exit 1): clang failed: error executing CppCompile command (from target @@xla//xla/codegen/intrinsic/cpp:eigen_unary_ll_lib) �[39m
2026-01-27T03:10:24.6351415Z �[0m�[1m[03:10:24] �[22m�[31m  (cd /workspace/bazel_root/097636303b1142f44508c1d8e3494e4b/sandbox/processwrapper-sandbox/58/execroot/__main__ && \�[39m
2026-01-27T03:10:24.6352155Z �[0m�[1m[03:10:24] �[22m�[31m  exec env - \�[39m
2026-01-27T03:10:24.6352916Z �[0m�[1m[03:10:24] �[22m�[31m    CCACHE_DIR=/root/.ccache \�[39m
2026-01-27T03:10:24.6353320Z �[0m�[1m[03:10:24] �[22m�[31m    CCACHE_NOHASHDIR=yes \�[39m
2026-01-27T03:10:24.6353702Z �[0m�[1m[03:10:24] �[22m�[31m    GRPC_BAZEL_RUNTIME=1 \�[39m
2026-01-27T03:10:24.6355562Z �[0m�[1m[03:10:24] �[22m�[31m    LD_LIBRARY_PATH=/usr/lib/csl-musl-x86_64:/usr/local/lib64:/usr/local/lib:/usr/lib64:/usr/lib:/lib64:/lib:/workspace/x86_64-linux-musl-cxx11/destdir/lib:/workspace/x86_64-linux-musl-cxx11/destdir/lib64:/opt/x86_64-linux-musl/x86_64-linux-musl/lib64:/opt/x86_64-linux-musl/x86_64-linux-musl/lib:/opt/x86_64-apple-darwin14/x86_64-apple-darwin14/lib:/opt/x86_64-apple-darwin14/lib:/workspace/destdir/lib64:/workspace/destdir/lib \�[39m
2026-01-27T03:10:24.6357172Z �[0m�[1m[03:10:24] �[22m�[31m    MACOSX_DEPLOYMENT_TARGET=12.3 \�[39m
2026-01-27T03:10:24.6358889Z �[0m�[1m[03:10:24] �[22m�[31m    PATH=/workspace/srcdir/Reactant.jl/deps/ReactantExtra/.local/bin:/opt/bin/x86_64-apple-darwin14-libgfortran5-cxx11-gpu_version+none-gpu+none-mode+opt:/opt/x86_64-apple-darwin14/bin:/opt/bin/x86_64-linux-musl-cxx11:/opt/x86_64-linux-musl/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/workspace/x86_64-linux-musl-cxx11/destdir/bin:/workspace/destdir/bin \�[39m
2026-01-27T03:10:24.6360421Z �[0m�[1m[03:10:24] �[22m�[31m    PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=upb \�[39m
2026-01-27T03:10:24.6361712Z �[0m�[1m[03:10:24] �[22m�[31m    *** \�[39m
2026-01-27T03:10:24.6362292Z �[0m�[1m[03:10:24] �[22m�[31m    TEMP=/workspace/srcdir/Reactant.jl/deps/ReactantExtra/.tmp \�[39m
2026-01-27T03:10:24.6362870Z �[0m�[1m[03:10:24] �[22m�[31m    TMP=/workspace/srcdir/Reactant.jl/deps/ReactantExtra/.tmp \�[39m
2026-01-27T03:10:24.6363471Z �[0m�[1m[03:10:24] �[22m�[31m    TMPDIR=/workspace/srcdir/Reactant.jl/deps/ReactantExtra/.tmp \�[39m
2026-01-27T03:10:24.6363955Z �[0m�[1m[03:10:24] �[22m�[31m    USE_CCACHE=true \�[39m
2026-01-27T03:10:24.6372802Z �[0m�[1m[03:10:24] �[22m�[31m  /opt/bin/x86_64-apple-darwin14-libgfortran5-cxx11-gpu_version+none-gpu+none-mode+opt/clang -U_FORTIFY_SOURCE '-stdlib=libc++' -g0 -O2 '-D_FORTIFY_SOURCE=1' -DNDEBUG -ffunction-sections -fdata-sections -MD -MF bazel-out/darwin-opt/bin/external/xla/xla/codegen/intrinsic/cpp/_objs/eigen_unary_ll_lib/eigen_unary.pic.d '-frandom-seed=bazel-out/darwin-opt/bin/external/xla/xla/codegen/intrinsic/cpp/_objs/eigen_unary_ll_lib/eigen_unary.pic.o' -fPIC '-DEIGEN_MAX_ALIGN_BYTES=64' -DEIGEN_ALLOW_UNALIGNED_SCALARS '-DEIGEN_USE_AVX512_GEMM_KERNELS=0' -iquote external/xla -iquote bazel-out/darwin-opt/bin/external/xla -iquote external/tsl -iquote bazel-out/darwin-opt/bin/external/tsl -iquote external/eigen_archive -iquote bazel-out/darwin-opt/bin/external/eigen_archive -isystem external/eigen_archive -isystem bazel-out/darwin-opt/bin/external/eigen_archive -isystem external/eigen_archive/mkl_include -isystem bazel-out/darwin-opt/bin/external/eigen_archive/mkl_include '-DMLIR_CAPI_BUILDING_LIBRARY=1' '-DMLIR_CAPI_ENABLE_WINDOWS_DLL_DECLSPEC=1' -DGRPC_BAZEL_BUILD '-std=c++17' -w '-std=c++17' '-DTCP_USER_TIMEOUT=0' -emit-llvm -O3 -DNDEBUG '-mprefer-vector-width=512' -DEIGEN_VECTORIZE_GENERIC -flax-vector-conversions -fno-builtin -Wno-psabi '-std=c++17' '-fno-experimental-sanitize-metadata=all' '--sysroot=/opt/x86_64-apple-darwin14/x86_64-apple-darwin14/sys-root/' -no-canonical-prefixes -Wno-builtin-macro-redefined '-D__DATE__="redacted"' '-D__TIMESTAMP__="redacted"' '-D__TIME__="redacted"' -Wno-unused-command-line-argument -Wno-gnu-offsetof-extensions -c external/xla/xla/codegen/intrinsic/cpp/eigen_unary.cc -o bazel-out/darwin-opt/bin/external/xla/xla/codegen/intrinsic/cpp/_objs/eigen_unary_ll_lib/eigen_unary.pic.o)�[39m
2026-01-27T03:10:24.6379582Z �[0m�[1m[03:10:24] �[22m�[31m# Configuration: e2baa8786b5b3fec5efc18ced402c3c0e19fe554111f6b0e8e936ed3a63155ca�[39m
2026-01-27T03:10:24.6380289Z �[0m�[1m[03:10:24] �[22m�[31m# Execution platform: @@local_execution_config_platform//:platform�[39m
2026-01-27T03:10:24.6380713Z �[0m�[1m[03:10:24] �[22m
2026-01-27T03:10:24.6381417Z �[0m�[1m[03:10:24] �[22m�[31mUse --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging�[39m
2026-01-27T03:10:24.6382351Z �[0m�[1m[03:10:24] �[22m�[31mIn file included from external/xla/xla/codegen/intrinsic/cpp/eigen_unary.cc:19:�[39m
2026-01-27T03:10:24.6383048Z �[0m�[1m[03:10:24] �[22m�[31mIn file included from external/xla/xla/codegen/intrinsic/cpp/eigen_unary.h:18:�[39m
2026-01-27T03:10:24.6383757Z �[0m�[1m[03:10:24] �[22m�[31mIn file included from external/xla/xla/codegen/intrinsic/cpp/vector_ops.h:26:�[39m
2026-01-27T03:10:24.6384378Z �[0m�[1m[03:10:24] �[22m�[31mIn file included from external/eigen_archive/Eigen/Core:209:�[39m
2026-01-27T03:10:24.6385838Z �[0m�[1m[03:10:24] �[22m�[31mexternal/eigen_archive/Eigen/src/Core/arch/clang/PacketMath.h:367:32: error: cannot initialize return object of type 'Packet8l' (aka 'VectorType<int64_t, 8>') with an rvalue of type 'long __attribute__((ext_vector_type(8)))' (vector of 8 'long' values)�[39m
2026-01-27T03:10:24.6386973Z �[0m�[1m[03:10:24] �[22m�[31m  367 | EIGEN_CLANG_PACKET_BITWISE_INT(Packet8l)�[39m
2026-01-27T03:10:24.6387415Z �[0m�[1m[03:10:24] �[22m�[31m      | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~�[39m
2026-01-27T03:10:24.6388177Z �[0m�[1m[03:10:24] �[22m�[31mexternal/eigen_archive/Eigen/src/Core/arch/clang/PacketMath.h:334:12: note: expanded from macro 'EIGEN_CLANG_PACKET_BITWISE_INT'�[39m
2026-01-27T03:10:24.6389077Z �[0m�[1m[03:10:24] �[22m�[31m  334 |     return PACKET_TYPE(0) == PACKET_TYPE(0);                                                         \�[39m
2026-01-27T03:10:24.6389633Z �[0m�[1m[03:10:24] �[22m�[31m      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~�[39m
2026-01-27T03:10:24.6390819Z �[0m�[1m[03:10:24] �[22m�[31mexternal/eigen_archive/Eigen/src/Core/arch/clang/PacketMath.h:394:44: error: reference to type 'const Packet8l' (aka 'const VectorType<int64_t, 8>') could not bind to an rvalue of type 'long __attribute__((ext_vector_type(8)))' (vector of 8 'long' values)�[39m
2026-01-27T03:10:24.6397732Z �[0m�[1m[03:10:24] �[22m�[31m  394 | EIGEN_CLANG_PACKET_BITWISE_FLOAT(Packet8d, detail::pcast_double_to_long, detail::pcast_long_to_double)�[39m
2026-01-27T03:10:24.6398542Z �[0m�[1m[03:10:24] �[22m�[31m      | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~�[39m
2026-01-27T03:10:24.6399409Z �[0m�[1m[03:10:24] �[22m�[31mexternal/eigen_archive/Eigen/src/Core/arch/clang/PacketMath.h:374:26: note: expanded from macro 'EIGEN_CLANG_PACKET_BITWISE_FLOAT'�[39m
2026-01-27T03:10:24.6400303Z �[0m�[1m[03:10:24] �[22m�[31m  374 |     return CAST_FROM_INT(CAST_TO_INT(a) == CAST_TO_INT(a));                                          \�[39m
2026-01-27T03:10:24.6400912Z �[0m�[1m[03:10:24] �[22m�[31m      |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~�[39m
2026-01-27T03:10:24.6401634Z �[0m�[1m[03:10:24] �[22m�[31mexternal/eigen_archive/Eigen/src/Core/arch/clang/PacketMath.h:326:67: note: passing argument to parameter 'a' here�[39m
2026-01-27T03:10:24.6402703Z �[0m�[1m[03:10:24] �[22m�[31m  326 | EIGEN_STRONG_INLINE Packet8d pcast_long_to_double(const Packet8l& a) { return reinterpret_cast<Packet8d>(a); }�[39m
2026-01-27T03:10:24.6403419Z �[0m�[1m[03:10:24] �[22m�[31m      |                                                                   ^�[39m
2026-01-27T03:10:24.6403828Z �[0m�[1m[03:10:24] �[22m�[31m2 errors generated.�[39m

cc @seantalts

[penumallas1261]

Hi @wsmoses ,

Thank you for creating this issue. To help us investigate, please share the steps and command you performed and simple standalone code snippet to reproduce the problem and also share the details about your platform or backend (CPU, GPU, or TPU).