<<< metadata_duplicate_useflag_description >>>
  dev-cpp/eigen|fftw:opengl:openmp|sci@gentoo.org:kde@gentoo.org
<<< packages_pkgcheck_scan >>>
    BetterCompressionUri: version 3.4.0-r1: line 11: better compression URI using extension '.tar.bz2' for 'https://gitlab.com/lib${PN}/${PN}/-/archive/${PV}/${P}.tar.gz'
    DeprecatedEclass: version 3.4.0-r2: uses deprecated eclass: llvm (migrate to llvm-r1.eclass)
    MissingUseDepDefault: version 3.4.0-r2: DEPEND="sys-libs/libomp[llvm_targets_NVPTX,offload]": USE flag 'llvm_targets_NVPTX' missing from packages: [ sys-libs/libomp-19.1.0_rc4, sys-libs/libomp-20.0.0_pre20240830, sys-libs/libomp-20.0.0_pre20240910, sys-libs/libomp-20.0.0.9999 ]
    MissingUseDepDefault: version 3.4.0-r2: DEPEND="sys-libs/libomp[llvm_targets_NVPTX,offload]": USE flag 'offload' missing from packages: [ sys-libs/libomp-19.1.0_rc4, sys-libs/libomp-20.0.0_pre20240830, sys-libs/libomp-20.0.0_pre20240910, sys-libs/libomp-20.0.0.9999 ]
    DeprecatedEclass: version 3.4.0-r3: uses deprecated eclass: llvm (migrate to llvm-r1.eclass)
    MissingUseDepDefault: version 3.4.0-r3: DEPEND="sys-libs/libomp[llvm_targets_NVPTX,offload]": USE flag 'llvm_targets_NVPTX' missing from packages: [ sys-libs/libomp-19.1.0_rc4, sys-libs/libomp-20.0.0_pre20240830, sys-libs/libomp-20.0.0_pre20240910, sys-libs/libomp-20.0.0.9999 ]
    MissingUseDepDefault: version 3.4.0-r3: DEPEND="sys-libs/libomp[llvm_targets_NVPTX,offload]": USE flag 'offload' missing from packages: [ sys-libs/libomp-19.1.0_rc4, sys-libs/libomp-20.0.0_pre20240830, sys-libs/libomp-20.0.0_pre20240910, sys-libs/libomp-20.0.0.9999 ]
    DeprecatedEclass: version 9999: uses deprecated eclass: llvm (migrate to llvm-r1.eclass)
    MissingUseDepDefault: version 9999: DEPEND="sys-libs/libomp[llvm_targets_NVPTX,offload]": USE flag 'llvm_targets_NVPTX' missing from packages: [ sys-libs/libomp-19.1.0_rc4, sys-libs/libomp-20.0.0_pre20240830, sys-libs/libomp-20.0.0_pre20240910, sys-libs/libomp-20.0.0.9999 ]
    MissingUseDepDefault: version 9999: DEPEND="sys-libs/libomp[llvm_targets_NVPTX,offload]": USE flag 'offload' missing from packages: [ sys-libs/libomp-19.1.0_rc4, sys-libs/libomp-20.0.0_pre20240830, sys-libs/libomp-20.0.0_pre20240910, sys-libs/libomp-20.0.0.9999 ]
<<< open bugs >>>
  https://bugs.gentoo.org/743172 dev-cpp/eigen-3.3.7_fails_to_build_tests_-_/var/tmp/portage/dev-cpp/eigen-3.3.7/work/eigen-3.3.7/Eigen/src/Core/MathFunctions.h:623:50:_error:_invalid_use_of_incomplete_type_‘struct_Eigen::internal::make_unsignedlong_long_int’
  https://bugs.gentoo.org/712808 dev-cpp/eigen-3.3.7_fails_tests:_753_-_openglsupport_(Failed)
  https://bugs.gentoo.org/754327 dev-cpp/eigen-3.3.7-r1_fails_to_build_tests_eigen-3.3.7-r1/work/eigen-3.3.7/unsupported/test/forward_adolc.cpp:14:_/usr/lib/gcc/i686-pc-linux-gnu/9.3.0/include/g++-v9/chrono:280:6:_error:_macro_&quot;max&quot;_requires_2_arguments,_but_only_1_given
  https://bugs.gentoo.org/771654 dev-cpp/eigen-3.3.9_fails_tests
  https://bugs.gentoo.org/807214 dev-cpp/eigen_fails_to_build_tests_(error:_‘namespace_mp_=_boost::boost::multiprecision;’_conflicts_with_a_previous_declaration)
  https://bugs.gentoo.org/932646 dev-cpp/eigen-3.4.0-r2_fails_tests:_Test_(_test_lazy_singleT,Rows,Cols,Depth,ColMajor,ColMajor,RowMajor(rows,cols,depth)_)_failed:_verifyIsApprox(C+=A.lazyProduct(B),_ref_prod(D,A,B)):_Difference_too_large_wrt_tolerance_0.001,_relative_error_is:_0.92997
  https://bugs.gentoo.org/927892 dev-cpp/eigen-3.4.0-r2_stabilisation,_then_cleanup_old