These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.25 s (backtrack: 0/20).

[ebuild  N     ] dev-build/b2-5.5.3::gentoo  USE="-examples" 1198 KiB
[ebuild  N     ] virtual/fortran-0-r1::gentoo  USE="openmp" 0 KiB
[ebuild  N     ] dev-cpp/magic_enum-0.9.8::gentoo  USE="-examples -test" 202 KiB
[ebuild  N     ] dev-cpp/taskflow-4.0.0::gentoo  USE="-examples -test" 62233 KiB
[ebuild  N     ] dev-libs/boost-1.91.0-r2:0/1.91.0::gentoo  USE="bzip2 context nls python stacktrace zlib -debug -doc -icu -lzma -mpi -numpy -test -test-full -tools -zstd" PYTHON_TARGETS="python3_14 -python3_12 -python3_13" 199785 KiB
[ebuild  N     ] sci-libs/gsl-2.7.1-r3:0/27::gentoo  USE="deprecated -cblas-external -static-libs" 7346 KiB
[ebuild  N     ] x11-libs/libpciaccess-0.19::gentoo  USE="zlib -static-libs" 64 KiB
[ebuild  N     ] sci-libs/openblas-0.3.34::gentoo  USE="openmp -cpudetection -index64 -pthread -relapack -test" 24734 KiB
[ebuild  N     ] sys-apps/hwloc-2.12.2:0/15::gentoo  USE="X cairo cpuid pci -cuda -debug -doc -l0 -nvml -rocm (-selinux) -static-libs -svg -udev -valgrind -xml" VIDEO_CARDS="-nvidia" 5504 KiB
[ebuild  N     ] dev-cpp/kokkos-5.1.1:0/5.1.1::gentoo  USE="openmp -cuda -test" 1751 KiB
[ebuild  N     ] sci-libs/lapack-3.12.1-r2::gentoo  USE="deprecated flexiblas lapacke -doc -eselect-ldso -index64 -test" 7879 KiB
[ebuild  N     ] sci-libs/flexiblas-3.5.0::gentoo  USE="openblas openmp system-blas -blis -index64 -mkl -tbb -test" 80741 KiB
[ebuild  N     ] sci-libs/blas-lapack-aux-wrapper-6::gentoo  USE="-index64 -test" 10 KiB
[ebuild  N     ] virtual/blas-3.8-r1::gentoo  USE="flexiblas -eselect-ldso -index64" 0 KiB
[ebuild  N     ] virtual/lapack-3.10-r1::gentoo  USE="flexiblas -eselect-ldso -index64" 0 KiB
[ebuild  N     ] sci-libs/suitesparseconfig-7.12.2-r2:0/7::gentoo  USE="openmp -cuda" 93104 KiB
[ebuild  N     ] sci-libs/amd-3.3.4-r1:0/3::gentoo  USE="-doc -fortran -test" 0 KiB
[ebuild  N     ] sci-libs/colamd-3.3.5-r1:0/3::gentoo  USE="-test" 0 KiB
[ebuild  N     ] sci-libs/camd-3.3.5-r1:0/3::gentoo  USE="-doc -test" 0 KiB
[ebuild  N     ] sci-libs/ccolamd-3.3.5-r1:0/3::gentoo  USE="-test" 0 KiB
[ebuild  N     ] sci-libs/cholmod-5.3.4-r2:0/5::gentoo  USE="cholesky matrixops modify openmp partition supernodal -cuda -doc -test" 0 KiB
[ebuild  N     ] sci-libs/umfpack-6.3.7-r1:0/6::gentoo  USE="openmp -doc -test" 0 KiB
[ebuild  N     ] sci-libs/dealii-9.7.1-r1::gentoo  USE="debug examples gsl lapack sparse -adolc -arborx -arpack -assimp -cgal -doc -ginkgo -gmsh -hdf5 -int64 -metis -mpi -mumps -muparser -opencascade -p4est -petsc -scalapack -slepc -sundials -symengine -trilinos -vtk" CPU_FLAGS_X86="avx avx512f sse2" 41315 KiB

Total: 23 packages (23 new), Size of downloads: 525857 KiB