google-research

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# Description:
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#   Eigen is a C++ template library for linear algebra: vectors,
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#   matrices, and related algorithms.
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licenses([
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    # Note: Eigen is an MPL2 library that includes GPL v3 and LGPL v2.1+ code.
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    #       We've taken special care to not reference any restricted code.
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    "reciprocal",  # MPL2
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    "notice",  # Portions BSD
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])
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exports_files(["COPYING.MPL2"])
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EIGEN_FILES = [
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    "Eigen/**",
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    "unsupported/Eigen/CXX11/**",
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    "unsupported/Eigen/FFT",
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    "unsupported/Eigen/KroneckerProduct",
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    "unsupported/Eigen/src/FFT/**",
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    "unsupported/Eigen/src/KroneckerProduct/**",
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    "unsupported/Eigen/MatrixFunctions",
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    "unsupported/Eigen/SpecialFunctions",
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    "unsupported/Eigen/src/MatrixFunctions/**",
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    "unsupported/Eigen/src/SpecialFunctions/**",
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]
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# Files known to be under MPL2 license.
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EIGEN_MPL2_HEADER_FILES = glob(
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    EIGEN_FILES,
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    exclude = [
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        # Guarantees that any non-MPL2 file added to the list above will fail to
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        # compile.
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        "Eigen/src/Core/util/NonMPL2.h",
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        "Eigen/**/CMakeLists.txt",
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    ],
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)
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cc_library(
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    name = "eigen",
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    hdrs = EIGEN_MPL2_HEADER_FILES,
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    defines = [
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        # This define (mostly) guarantees we don't link any problematic
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        # code. We use it, but we do not rely on it, as evidenced above.
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        "EIGEN_MPL2_ONLY",
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        "EIGEN_MAX_ALIGN_BYTES=64",
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        "EIGEN_HAS_TYPE_TRAITS=0",
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    ],
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    includes = ["."],
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    visibility = ["//visibility:public"],
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)
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filegroup(
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    name = "eigen_header_files",
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    srcs = EIGEN_MPL2_HEADER_FILES,
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    visibility = ["//visibility:public"],
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)
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