- Add _constraints for docs(+test) to avoid OOM build failures
- Drop obsolete/unnecessary patches
  * eigen3-3.3.1-fixcmake.patch (no longer has any effect)
  * 01_install_FindEigen3.patch (CMake Config mode is preferred)
- Fix build for ppc64le (affects test and dependent packages, e.g.
  arpack-ng), add fix_ppc64le_always_inline_680.patch

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* Update to version 3.4.0
* Drop patches incorporated or otherwise fixed upstream: * eigen3-CastXML-support-for-aarch64.patch.  * eigen3-make-sparseqr-unit-test-stable.patch.  * eigen3-failtests-handling.patch.
* Rebase following patches for updated sources: * 0001-Disable-Altivec-for-ppc64le.patch.  * 0001-Do-stack-allignment-on-ppc.patch.
* Minor line offset adjustments of other patches to apply cleanly.

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* Update to version 3.3.9.
* Drop Remove-error-counting-in-OpenMP-parallelize_gemm.patch: incorporated upstream.
* Add patches to fix building and running tests.
* Setup but don't run tests due to random errors in test-suite itself.
* Pass CMAKE_SKIP_RPATH:BOOL=OFF and CMAKE_SKIP_INSTALL_RPATH:BOOL=ON to cmake to fix rpath handling in Leap 15.2's cmake macros (doesn't hurt generally).
* Change CMAKE_BUILD_TYPE from Release to RelWithDebInfo (openSUSE default).

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- Drop eigen_pkgconfig.patch: the includedir now needs to be specified relative to CMAKE_INSTALL_PREFIX, so this patch causes the includedir in the pkgconfig file to be erroneousi (boo#1178139).
- Use %autosetup to automatically run through patches.

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- Fix compilation error when using Eigen3 with OpenMP:
  *  Remove-error-counting-in-OpenMP-parallelize_gemm.patch

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- Update to version 3.3.8:
  * General bug fixes:
    - Issue #1995: Fix a failure in the GEBP kernel when using
      small L1 cache sizes, OpenMP and FMA.
    - Issue #1990: Make CMake accept installation paths relative
      to CMAKE_INSTALL_PREFIX.
    - Issue #1974: Fix issue when reserving an empty sparse matrix
    - Issue #1823: Fix incorrect use of std::abs
    - Issue #1788: Fix rule-of-three violations inside the stable
      modules. This fixes deprecated-copy warnings when compiling
      with GCC>=9. Also protect some additional Base-constructors
      from getting called by user code code (Issue #1587)
    - Issue #1796: Make matrix squareroot usable for Map and Ref
      types.
    - Issue #1281: Fix AutoDiffScalar's make_coherent for nested
      expression of constant ADs.
    - Issue #1761: Fall back is_integral to std::is_integral in
      c++11 and fix internal::is_integral<size_t/ptrdiff_t> with
      MSVC 2013 and older.
    - Issue #1741: Fix self-adjoint*matrix, triangular*matrix, and
      triangular^1*matrix with a destination having a non-trivial
      inner-stride.
    - Issue #1741: Fix SelfAdjointView::rankUpdate and product to
      triangular part for destination with non-trivial inner
      stride.
    - Issue #1741: Fix C.noalias() = A*C; with C.innerStride()!=1.
    - Issue #1695: Fix a numerical robustness issue in BDCSVD.
    - Issue #1692: Enable enum as sizes of Matrix and Array.
    - Issue #1689: Fix used-but-marked-unused warning.
    - Issue #1679: Avoid possible division by 0 in complex-schur.
    - Issue #1676: Fix C++17 template deduction in DenseBase.
    - Issue #1669: Fix PartialPivLU/inverse with zero-sized
      matrices.
    - Issue #1557: Fix RealSchur and EigenSolver for matrices with
      only zeros on the diagonal.
  * Performance related fixes:
    - Issue #1562: Optimize evaluation of small products of the
      form s*A*B by rewriting them as: s*(A.lazyProduct(B)) to
      save a costly temporary. Measured speedup from 2x to 5x...
    - Fix performance issue with SimplicialLDLT for complexes
      coefficients.
  * Misc fixes:
    - Fix QuaternionBase::cast for quaternion map and wrapper.
    - Fix case issue with Lapack unit tests.
    - Fix possible conflict with an externally defined "real" type
      when using gcc-5.
    - Provide numext::[u]int{32,64}_t.
    - Initialize isometric transforms like affine transforms.
    - Change typedefs from private to protected to fix MSVC
      compilation.
    - Fix compilation of FFTW unit test.
    - Fix compilation of BLAS backend and frontend.
    - Fix real/imag namespace conflict.
    - Avoid throwing in destructors.
    - Fix precision issue in SelfAdjointEigenSolver.h
    - Make digits10() return an integer.
    - Use pade for matrix exponential also for complex values.
    - Cast Index to RealScalar in SVDBase to fix an issue when
      RealScalar is not implicitly convertible to Index.
    - Provide EIGEN_HAS_C99_MATH when using MSVC.
    - Various fixes in polynomial solver and its unit tests.
    - nd 4415d4e2d: Extend polynomial solver unit tests to
      complexes.
    - Automatically switch between EigenSolver and
      ComplexEigenSolver, and fix a few Real versus Scalar issues.
    - Enable construction of Ref<VectorType> from a runtime
      vector.
    - Fix a problem of old gcc versions having problems with
      recursive #pragma GCC diagnostic push/pop.
    - Fix compilation with expression template scalar type.
    - Backport AVX512 implementation to 3.3.
    - Fix StlDeque compilation issue with GCC 10.
    - Avoid false-positive test results in non-linear optimization
      tests.
    - Fix undefined behaviour caused by uncaught exceptions in OMP
      section of parallel GEBP kernel.
    - Fix a bug with half-precision floats on GPUs.
  * Fixed warnings:
    - Fix some maybe-uninitialized warnings in AmbiVector.h and
      test bdcsvd.
    - Silent cmake warnings in Lapack CMakeLists.txt.
    - Rename variable which shadows class name in Polynomials
      module.
    - Workaround gcc's alloc-size-larger-than= warning in
      DenseStorage.h.
    - Hide some unused variable warnings in g++8.1 in Tensor
      contraction mapper.
    - Fix gcc 8.1 warning: "maybe use uninitialized" in std tests.
    - Fix always true warning with gcc 4.7in test numext.
    - Fix nonnull-compare warning in test geo_alignedbox.
    - Disable ignoring attributes warning in vectorization logic
      test.
    - Fix a gcc7 warning about bool * bool in abs2 default
      implementation.
    - Fix a warning in SparseSelfAdjointView about a branch
      statement always evaluation to false.
- Minor rebase of patches to fix offsets.
- Specify relative path to includedir as option to cmake as it
  only accepts paths relative to CMAKE_INSTALL_PREFIX now.
- Drop Group tags.

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(Needed to fix builds for insighttoolkit on aarch64)

Add eigen3-CastXML-support-for-aarch64.patch to support CastXML on aarch64 [https://gitlab.com/libeigen/eigen/-/issues/1979]; patch taken from upstream commit and rebased to apply without fuzz.

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Reduce dependency chain for main (devel) package

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revert

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multibuild prep

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- Clean up spec file:
  * Correct License tag, some included algorithms are LGPL-2.1-only
  * Remove conditionals for obsolete distributions (which were failing
    or unresolvable anyway)
  * Remove defattr, use license macro
  * Hide GL/GLUT/GLEW BuildRequires behind tests bcond, as tests are
    not build currently
  * Add missing BuildRequires tex(newunicodechar.sty), group doc dependencies

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