sci-libs/vtk: add 9.2.2

- add a new function to check memory and disk space requirements
- don't drop bundled external libraries, it's only a few MB which are freed
	through this and upstream does a good job to avoid automagic deps
- request more modules to build explicitly depending on USE flag settings
- don't export CC and friends with USE=mpi, package builds fine with gcc and still
	links to MPI libraries
- add USE flag to build vtk-m optional

Bug: https://bugs.gentoo.org/793221
Bug: https://bugs.gentoo.org/835659
Bug: https://bugs.gentoo.org/880759
Closes: https://bugs.gentoo.org/820593
Closes: https://bugs.gentoo.org/827310
Closes: https://bugs.gentoo.org/846374
Closes: https://bugs.gentoo.org/874798
Signed-off-by: Bernd Waibel <waebbl-gentoo@posteo.net>
Closes: https://github.com/gentoo/gentoo/pull/28250
Signed-off-by: Joonas Niilola <juippis@gentoo.org>

6 files changed, 863 insertions, 1 deletions

diff --git a/sci-libs/vtk/Manifest b/sci-libs/vtk/Manifest
index 52b37377441f..2ee625c9b35b 100644
--- a/sci-libs/vtk/Manifest
+++ b/sci-libs/vtk/Manifest
@@ -1,10 +1,16 @@
 DIST VTK-9.0.3.tar.gz 34684378 BLAKE2B 6862ab2df95bbefe9d3970757af6521cfa874476f6ee8e64c4e6e279f2e0cbb8a8299bc3b0b8bb9b7254d01a169644e7927b67b11b2ce934ddc87bce0a9e4c26 SHA512 00528011f9206444d09fc6cea05c46930745bb70ea02be6244ab3eb510ae82af772157c025157b1761dc4c6a9ab538b57f814c03a708f30aa3598a421fdc6ae2
 DIST VTK-9.1.0.tar.gz 47871165 BLAKE2B 68cebc0879737a519b53e73f198356208b047c301d38ee2d62b9a14539cdb9aa76bd7174baa29592c7b1cfd1cc9700d01e98519a207d67a232d16ad37295ac31 SHA512 b2c4be8795fa082e0776e6ffdb9a3fd88dbb235841a8369a34ebe26cf4c5fcb1610fcca987be314510629da3edc74ee76c0ce2cc88d5ef4b099ac550ac892b0a
+DIST VTK-9.2.2.tar.gz 53801737 BLAKE2B 345538004a1b147f8a6812e30b6e31bdfba27d13c47e3c659ef6eb51224aa6015a44e6aaabbc6d1b127691592b4727a51c952dc565d1a12f2eddedd1536af58b SHA512 11b8203a4efaac0cda9ea46acf58c0d88c18f55bfd52e284f74ef313646913d194d3885da9d9fa7222d926502522505bfdf9d719f8c09790dab1315e2161610a
 DIST VTKData-9.0.3.tar.gz 413854066 BLAKE2B 84c2fa0ae5df8567cc06022262fe3ea1202c553168757c94aa4a0a258360deccdf349d474c2f6585fc2054ee8e0468df4c80ec835cecf6b2391efa639f479eaa SHA512 28ab2ecb32860d820f736e9ceb4345bcd03471f0a35b90f8c9ccbe05454f7a95a4de3c99bae2f4b9db87a27ef8fe50159cd283f5e921f4e6e69b06a50a0570c6
 DIST VTKData-9.1.0.tar.gz 590185633 BLAKE2B 7451d57bc507571afa8a8f9ba541010e1924849759f228318b6390aabb07a68341b84b38b82cd504844194544c569b040c9fad1858e6e35e172e4e18000d338e SHA512 134a8dd2b029d3a4959b601987e68a0caa5d050532655b6786b5b67dfc77d3639628b2b957511f8998e63864c247c501a11a6aed248c762f13e860d878778e1a
+DIST VTKData-9.2.2.tar.gz 593767482 BLAKE2B 65df8f96eaca9ada44f807bd4ff5efe569dde726105c7aa260c4f0ed3b8c19303b7781e0628a759cdf68b314155ac0d125403f27ee38eefd47336a8eed235851 SHA512 54d33ba24c9adfef2de17f26aa68b53f61f32e50d92bd1b0ddd75b1818d864af9a4d7fa7cb55297839bd2e50c2a7d12a18695151db32f7f59fbbd2ec9169e7b8
 DIST VTKDataFiles-9.1.0.tar.gz 605163184 BLAKE2B 968e2fed1e17bb57da4f8dd38e17e128779e50dfce81fc31c6ef75a2f3fe46675dd77ab7343b609998b8ddd3927e256d1ea4117c2719ad76f61db435b5f1c34f SHA512 f56ebd087753e2d2805e2f5954197de4e9933ec90648956780525d83149277a7bca42ce376c4355a53fca71ec78510fed155955af71b70e1b26de27851252e36
+DIST VTKDataFiles-9.2.2.tar.gz 608752734 BLAKE2B b33bcec704e0db3ad0de958fbeca1adc1b904279b46a43a5abcd45a7df96138d4d3b76cb21af3aa48c0dd18d05987bdf58476fa945b59ed5b90ad6f2e386926f SHA512 75430127212fdf210fb98d278b0163b4ed09f567fd1b80fcf80ea1cf2709e41f785912b20591712f71ad7ede9e12e23e358b4889963bccfe66cf8c48a7f70e11
 DIST VTKLargeData-9.0.3.tar.gz 247523270 BLAKE2B f4011292957454da5d8c9e515bcd0972af4299cef3928098d745be96559a1e0080297871c6e11fdd98498c8786a30a6674bc650368adcbcdbc6260e0938d21a1 SHA512 ebd6cb5f2935b77961dd68d0c0da2ea5ab900cec8c2eb641c785a604c65702e40a3e44d32bf3f2acfce9ec28dd89f41bf29f93a4f89d5b36c713f3743d7125b1
 DIST VTKLargeData-9.1.0.tar.gz 247517666 BLAKE2B 1b47829ad51f246ff26c8b6d16c9fa431e53ca33fec99e8aa78ee156a82e4b3351e32ee36674d9d345f346efad085ae1e2d3186a144911d2210a31a259e69f1f SHA512 0760dfd4e92bbfec10fec9d783f548a8ca5464b1a1744dfa575d4ed4592756335dbfcf28249d2da964aa6b41933ff1ac98458e4a32484ee4bb91b5e7cfaa78c9
+DIST VTKLargeData-9.2.2.tar.gz 247523477 BLAKE2B a17f2e5499efb469162f2face7e5fb0cb559302d0ede75b3b0602036aba80d248895450c5da65198a4bed0a9a0d70e6b2a22e18447d7bab04b8277cb943ebd79 SHA512 4ee1f0b4dac929f7335d2a23ad56ddddaa8ebba34c547c18883418f56fb285fba38ffbfd5124ab428b6e19e87a916ba0858ae227af453519c1cbd5598fe6ccf6
 DIST VTKLargeDataFiles-9.1.0.tar.gz 247504557 BLAKE2B a05892347a1a5cf5cb0df3f1c1d94efcdb68c28bcd0391617602565fddc4277ac44accec6f1b3ae2822a860f3d5f5642a56e36171b5d81bef137561182051d08 SHA512 10abc287256c7ec5fb7114f4054eda5cde1b75a8d2bbe70375fb96d31b7c4164be936489ce2fc9b5c33225f494d9b7f5f7bed648828661b17d6f66acb70eeddc
+DIST VTKLargeDataFiles-9.2.2.tar.gz 247507138 BLAKE2B af593595b0b681a91e491a9fcab748d1d2ba2949d3da728eab60e94810d1d550ad66318d3f66ec170c020212b95e7273dd530fcf243eaebbe0255f589098b74a SHA512 0c919e1b425da5f77af1dec4f83c993387e95f84a8273ded4d2486c3fd171cf3a4f5cb7a80e722200cc44a19bf1fdc358fcea48c4c741d9a5f5fc6086e4c602c
 DIST vtkDocHtml-9.0.3.tar.gz 132650096 BLAKE2B 45fc1a6942df3e79e500a552c3b3cda2099b9451191559d471e3a2e785a8c52b2c6273cfd2cc4a3f3f65582e607d9414475f58d243fde96a4f985bed479e53db SHA512 9b5fef43f3c2b92aa1fe6a9ba9458d6677874b09b167654db7f26df6feffdc34ed1a8fb4e59d64b75625063a774af77fe57f275903602a5f7daa74e1a2e71800
 DIST vtkDocHtml-9.1.0.tar.gz 152767166 BLAKE2B 9163b6b1bf55810a310ca8bc211e067827b1f9907efd2a378363d8e6296d4bf07b25371b66c00cab3576fb06f0cb63fdf2ffea044033e2c42e9087819a3736ba SHA512 036daba5eb6503b5eb3e9323a4ab3ea0f27c09d8fef411dd2ed154c24d5a37d9f19d57db07576c8af404bfdb7178e95b137a3c27bfedb3f9cb72c04f717da80a
+DIST vtkDocHtml-9.2.2.tar.gz 158843945 BLAKE2B 682206834319d22d4ffe9bb7f5d20828274cbc7fc14b8215afeddf4783d07f61dab84d0562b002b76306551d20ceac904763168b29dfe1eb429fe8d0e0f3ebda SHA512 d03ed66c5ace0d8c7698a17574f7a44ca2a5361397508d2080812e6cc894fce566c3b552687b8af31e3eb25511d7ad0b98b33044f327e3b5a03451ee2e50cff0
diff --git a/sci-libs/vtk/files/vtk-9.2.2-VTKm-respect-user-CXXFLAGS.patch b/sci-libs/vtk/files/vtk-9.2.2-VTKm-respect-user-CXXFLAGS.patch
new file mode 100644
index 000000000000..c47bced20f22
--- /dev/null
+++ b/sci-libs/vtk/files/vtk-9.2.2-VTKm-respect-user-CXXFLAGS.patch
@@ -0,0 +1,81 @@
+From 225a077898eb714e5ecb80255796aa70625e6cea Mon Sep 17 00:00:00 2001
+From: Bernd Waibel <waebbl-gentoo@posteo.net>
+Date: Sat, 12 Nov 2022 02:01:35 +0100
+Subject: [PATCH] VTKm respect user CXXFLAGS
+
+Signed-off-by: Bernd Waibel <waebbl-gentoo@posteo.net>
+--- a/Accelerators/Vtkm/Core/CMakeLists.txt
++++ b/Accelerators/Vtkm/Core/CMakeLists.txt
+@@ -79,6 +79,16 @@ if (TARGET vtkm::cuda)
+   vtk_module_set_properties(VTK::AcceleratorsVTKmCore
+     LANGUAGE CUDA
+     CUDA_SEPARABLE_COMPILATION ON)
++
++  string(STRIP ${CMAKE_CXX_FLAGS} _cmake_cxx_flags)
++  string(REPLACE " " ";" cmake_cxx_flags_list ${_cmake_cxx_flags})
++  set(cxx_flags -Wall)
++  foreach(cmake_cxx_flag ${cmake_cxx_flags_list})
++    list(APPEND cxx_flags $<$<COMPILE_LANGUAGE:CUDA>:-Xcompiler=${cmake_cxx_flag}>)
++  endforeach()
++  vtk_module_compile_options(VTK::AcceleratorsVTKmCore
++    PUBLIC
++      ${cxx_flags})
+ endif()
+ 
+ if (MSVC)
+--- a/Accelerators/Vtkm/DataModel/CMakeLists.txt
++++ b/Accelerators/Vtkm/DataModel/CMakeLists.txt
+@@ -89,6 +89,16 @@ if (TARGET vtkm::cuda)
+ 
+   vtk_module_compile_options(VTK::AcceleratorsVTKmDataModel
+     PUBLIC $<$<COMPILE_LANGUAGE:CUDA>:-Xcudafe --diag_suppress=extra_semicolon>)
++
++  string(STRIP ${CMAKE_CXX_FLAGS} _cmake_cxx_flags)
++  string(REPLACE " " ";" cmake_cxx_flags_list ${_cmake_cxx_flags})
++  set(cxx_flags -Wall)
++  foreach(cmake_cxx_flag ${cmake_cxx_flags_list})
++    list(APPEND cxx_flags $<$<COMPILE_LANGUAGE:CUDA>:-Xcompiler=${cmake_cxx_flag}>)
++  endforeach()
++  vtk_module_compile_options(VTK::AcceleratorsVTKmDataModel
++    PUBLIC
++      ${cxx_flags})
+ endif ()
+ 
+ if (MSVC)
+--- a/Accelerators/Vtkm/Filters/CMakeLists.txt
++++ b/Accelerators/Vtkm/Filters/CMakeLists.txt
+@@ -138,6 +138,16 @@ if (TARGET vtkm::cuda)
+ 
+   vtk_module_compile_options(VTK::AcceleratorsVTKmFilters
+     PUBLIC $<$<COMPILE_LANGUAGE:CUDA>:-Xcudafe --diag_suppress=extra_semicolon>)
++
++  string(STRIP ${CMAKE_CXX_FLAGS} _cmake_cxx_flags)
++  string(REPLACE " " ";" cmake_cxx_flags_list ${_cmake_cxx_flags})
++  set(cxx_flags -Wall)
++  foreach(cmake_cxx_flag ${cmake_cxx_flags_list})
++    list(APPEND cxx_flags $<$<COMPILE_LANGUAGE:CUDA>:-Xcompiler=${cmake_cxx_flag}>)
++  endforeach()
++  vtk_module_compile_options(VTK::AcceleratorsVTKmFilters
++    PUBLIC
++      ${cxx_flags})
+ endif ()
+ 
+ if (MSVC)
+--- a/ThirdParty/vtkm/vtkvtkm/vtk-m/CMake/VTKmCompilerFlags.cmake
++++ b/ThirdParty/vtkm/vtkvtkm/vtk-m/CMake/VTKmCompilerFlags.cmake
+@@ -126,6 +126,12 @@ elseif(VTKM_COMPILER_IS_ICC)
+ elseif(VTKM_COMPILER_IS_GNU OR VTKM_COMPILER_IS_CLANG)
+   set(cxx_flags -Wall -Wcast-align -Wextra -Wpointer-arith -Wformat -Wformat-security -Wshadow -Wunused -fno-common -Wno-unused-function)
+   set(cuda_flags -Xcompiler=-Wall,-Wcast-align,-Wpointer-arith,-Wformat,-Wformat-security,-Wshadow,-fno-common,-Wunused,-Wno-unknown-pragmas,-Wno-unused-local-typedefs,-Wno-unused-function)
++  string(STRIP ${CMAKE_CXX_FLAGS} _cmake_cxx_flags)
++  string(REPLACE " " ";" cmake_cxx_flags_list ${_cmake_cxx_flags})
++  foreach(elem ${cmake_cxx_flags_list})
++    list(PREPEND cxx_flags ${elem})
++    list(PREPEND cuda_flags -Xcompiler=${elem})
++  endforeach()
+ 
+   #Clang does not support the -Wchar-subscripts flag for warning if an array
+   #subscript has a char type.
+-- 
+2.38.1
+
diff --git a/sci-libs/vtk/files/vtk-9.2.2-link-with-glut-library-for-freeglut.patch b/sci-libs/vtk/files/vtk-9.2.2-link-with-glut-library-for-freeglut.patch
new file mode 100644
index 000000000000..39b7e7ab0f15
--- /dev/null
+++ b/sci-libs/vtk/files/vtk-9.2.2-link-with-glut-library-for-freeglut.patch
@@ -0,0 +1,18 @@
+From 801654a5f1c3991ff9bb3ea5798afdd252d214b6 Mon Sep 17 00:00:00 2001
+From: Bernd Waibel <waebbl-gentoo@posteo.net>
+Date: Mon, 21 Nov 2022 15:35:58 +0100
+Subject: [PATCH] link with glut library for freeglut
+
+Signed-off-by: Bernd Waibel <waebbl-gentoo@posteo.net>
+--- a/Rendering/External/Testing/Cxx/CMakeLists.txt
++++ b/Rendering/External/Testing/Cxx/CMakeLists.txt
+@@ -12,5 +12,5 @@ if(NOT APPLE)
+ 
+   vtk_test_cxx_executable(vtkRenderingExternalCxxTests tests)
+   target_link_libraries(vtkRenderingExternalCxxTests PRIVATE
+-    ${GLUT_LIBRARY})
++    ${GLUT_LIBRARIES})
+ endif()
+-- 
+2.38.1
+
diff --git a/sci-libs/vtk/files/vtk-9.2.2-vtkGeometryFilter-add-missing-mutex-header-file.patch b/sci-libs/vtk/files/vtk-9.2.2-vtkGeometryFilter-add-missing-mutex-header-file.patch
new file mode 100644
index 000000000000..287d804847bb
--- /dev/null
+++ b/sci-libs/vtk/files/vtk-9.2.2-vtkGeometryFilter-add-missing-mutex-header-file.patch
@@ -0,0 +1,20 @@
+From https://gitlab.kitware.com/vtk/vtk/-/commit/57767732c4d54db89004c685022ac828bb51eccd
+
+From 57767732c4d54db89004c685022ac828bb51eccd Mon Sep 17 00:00:00 2001
+From: Andrew Bauer <bauer.andrew.c@gmail.com>
+Date: Wed, 27 Jul 2022 09:31:13 -0400
+Subject: [PATCH 033/614] vtkGeometryFilter: add missing mutex header file
+
+--- a/Filters/Geometry/vtkGeometryFilter.cxx
++++ b/Filters/Geometry/vtkGeometryFilter.cxx
+@@ -52,6 +52,7 @@
+ #include "vtkWedge.h"
+ 
+ #include <memory>
++#include <mutex>
+ 
+ vtkStandardNewMacro(vtkGeometryFilter);
+ vtkCxxSetObjectMacro(vtkGeometryFilter, Locator, vtkIncrementalPointLocator);
+-- 
+2.38.1
+
diff --git a/sci-libs/vtk/metadata.xml b/sci-libs/vtk/metadata.xml
index 104d25f0b118..d047994a2853 100644
--- a/sci-libs/vtk/metadata.xml
+++ b/sci-libs/vtk/metadata.xml
@@ -17,17 +17,26 @@
     <flag name="all-modules">Build all modules</flag>
     <flag name="boost">Add support for boost</flag>
     <flag name="cuda">Add support for CUDA</flag>
+    <flag name="freetype">Build support for font rendering</flag>
     <flag name="gdal">Support for gdal formated data</flag>
     <flag name="imaging">Building Imaging modules</flag>
     <flag name="json">Support for json formatted data</flag>
     <flag name="kits">Build kits in addition to modules</flag>
-    <flag name="logging">Enable the loguru logging module</flag>
+    <flag name="las">Build support for LiDAR files</flag>
+    <flag name="logging">Build the logging module</flag>
     <flag name="offscreen">Offscreen rendering through OSMesa</flag>
+    <flag name="openvdb">Build support to handle VDB data files</flag>
+    <flag name="pdal">Build support to handle point cloud data files</flag>
     <flag name="pegtl">Use pegtl to build parsers</flag>
     <flag name="qt6">Use Qt6 packages instead of Qt5</flag>
     <flag name="rendering">Building Redering modules</flag>
+    <flag name="sdl">Enable SDL2 support for rendering modules</flag>
     <flag name="tbb">Use <pkg>dev-cpp/tbb</pkg> to handle smp support</flag>
     <flag name="views">Building Views modules</flag>
+    <flag name="vtkm">Build the vtkm accelerations modules</flag>
     <flag name="web">Install web component</flag>
   </use>
+  <upstream>
+    <remote-id type="github">Kitware/VTK</remote-id>
+  </upstream>
 </pkgmetadata>
diff --git a/sci-libs/vtk/vtk-9.2.2.ebuild b/sci-libs/vtk/vtk-9.2.2.ebuild
new file mode 100644
index 000000000000..51c14eedf0a3
--- /dev/null
+++ b/sci-libs/vtk/vtk-9.2.2.ebuild
@@ -0,0 +1,728 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# TODO:
+# - add USE flag for remote modules? Those modules can be downloaded
+#	properly before building.
+# - replace usex by usev where applicable
+
+PYTHON_COMPAT=( python3_{8..10} )
+WEBAPP_OPTIONAL=yes
+WEBAPP_MANUAL_SLOT=yes
+
+inherit check-reqs cmake cuda java-pkg-opt-2 multiprocessing python-single-r1 toolchain-funcs virtualx webapp
+
+# Short package version
+MY_PV="$(ver_cut 1-2)"
+
+DESCRIPTION="The Visualization Toolkit"
+HOMEPAGE="https://www.vtk.org/"
+SRC_URI="
+	https://www.vtk.org/files/release/${MY_PV}/VTK-${PV}.tar.gz
+	https://www.vtk.org/files/release/${MY_PV}/VTKData-${PV}.tar.gz
+	https://www.vtk.org/files/release/${MY_PV}/VTKDataFiles-${PV}.tar.gz
+	doc? ( https://www.vtk.org/files/release/${MY_PV}/vtkDocHtml-${PV}.tar.gz )
+	examples? (
+		https://www.vtk.org/files/release/${MY_PV}/VTKLargeData-${PV}.tar.gz
+		https://www.vtk.org/files/release/${MY_PV}/VTKLargeDataFiles-${PV}.tar.gz
+	)
+	test? (
+		https://www.vtk.org/files/release/${MY_PV}/VTKLargeData-${PV}.tar.gz
+		https://www.vtk.org/files/release/${MY_PV}/VTKLargeDataFiles-${PV}.tar.gz
+	)
+"
+S="${WORKDIR}/VTK-${PV}"
+
+LICENSE="BSD LGPL-2"
+SLOT="0/${MY_PV}"
+KEYWORDS="~amd64 ~arm ~arm64 ~x86 ~amd64-linux ~x86-linux"
+# TODO: Like to simplifiy these. Mostly the flags related to Groups.
+IUSE="all-modules boost cuda debug doc examples ffmpeg freetype gdal imaging
+	java las +logging mpi mysql odbc openmp openvdb pdal postgres python qt5
+	qt6 +rendering sdl tbb test +threads tk video_cards_nvidia views vtkm web"
+
+RESTRICT="!test? ( test )"
+
+REQUIRED_USE="
+	all-modules? (
+		boost ffmpeg freetype gdal imaging las mysql odbc openvdb pdal
+		postgres rendering views
+	)
+	cuda? ( video_cards_nvidia vtkm )
+	java? ( rendering )
+	python? ( ${PYTHON_REQUIRED_USE} )
+	qt5? ( rendering )
+	qt6? ( rendering )
+	sdl? ( rendering )
+	tk? ( python rendering )
+	web? ( python )
+"
+
+# for <pegtl-3 dependency see
+# https://discourse.vtk.org/t/compilation-errors-related-to-pegtl-proj/5929
+# eigen, nlohmann_json, pegtl and utfcpp are referenced in the cmake files
+# and need to be available when VTK consumers configure the dependencies.
+RDEPEND="
+	app-arch/lz4:=
+	app-arch/xz-utils
+	dev-cpp/eigen
+	dev-cpp/nlohmann_json
+	dev-db/sqlite:3
+	dev-libs/double-conversion:=
+	dev-libs/expat
+	dev-libs/icu:=
+	dev-libs/jsoncpp:=
+	>=dev-libs/libfmt-8.1.1:=
+	dev-libs/libxml2:2
+	dev-libs/libzip:=
+	<dev-libs/pegtl-3
+	dev-libs/pugixml
+	dev-libs/utfcpp
+	media-libs/freetype
+	media-libs/libjpeg-turbo
+	>=media-libs/libharu-2.4.2:=
+	media-libs/libogg
+	media-libs/libpng:=
+	media-libs/libtheora
+	media-libs/tiff
+	>=sci-libs/cgnslib-4.1.1:=[hdf5,mpi=]
+	sci-libs/hdf5:=[mpi=]
+	sci-libs/proj:=
+	sci-libs/netcdf:=[mpi=]
+	sys-libs/zlib
+	boost? ( dev-libs/boost:=[mpi?] )
+	cuda? ( dev-util/nvidia-cuda-toolkit:= )
+	ffmpeg? ( media-video/ffmpeg:= )
+	freetype? ( media-libs/fontconfig )
+	gdal? ( sci-libs/gdal:= )
+	java? ( >=virtual/jdk-1.8:* )
+	las? ( sci-geosciences/liblas )
+	mpi? ( virtual/mpi[cxx,romio] )
+	mysql? ( dev-db/mariadb-connector-c )
+	odbc? ( dev-db/unixODBC )
+	openvdb? ( media-gfx/openvdb:= )
+	pdal? ( sci-libs/pdal:= )
+	postgres? ( dev-db/postgresql:= )
+	python? (
+		${PYTHON_DEPS}
+		$(python_gen_cond_dep 'mpi? ( dev-python/mpi4py[${PYTHON_USEDEP}] )')
+	)
+	qt5? (
+		dev-qt/qtcore:5
+		dev-qt/qtopengl:5
+		dev-qt/qtquickcontrols2:5
+		dev-qt/qtsql:5
+		dev-qt/qtwidgets:5
+	)
+	qt6? (
+		dev-qt/qtbase:6[gui,opengl,sql,widgets]
+		dev-qt/qtdeclarative:6[opengl]
+		dev-qt/qtshadertools:6
+		x11-libs/libxkbcommon
+	)
+	sdl? ( media-libs/libsdl2 )
+	rendering? (
+		media-libs/glew:=
+		virtual/opengl
+		x11-libs/gl2ps
+		x11-libs/libICE
+		x11-libs/libXcursor
+		x11-libs/libXext
+	)
+	tbb? ( dev-cpp/tbb:= )
+	tk? ( dev-lang/tk:= )
+	video_cards_nvidia? ( x11-drivers/nvidia-drivers[tools,static-libs] )
+	views? (
+		x11-libs/libICE
+		x11-libs/libXext
+	)
+	web? ( ${WEBAPP_DEPEND} )
+"
+
+# for <pegtl-3 dependency see
+# https://discourse.vtk.org/t/compilation-errors-related-to-pegtl-proj/5929
+DEPEND="
+	${RDEPEND}
+	dev-cpp/eigen
+	dev-cpp/nlohmann_json
+	<dev-libs/pegtl-3
+	dev-libs/utfcpp
+	test? (
+		media-libs/glew
+		x11-libs/libXcursor
+		rendering? ( media-libs/freeglut )
+	)
+"
+BDEPEND="virtual/pkgconfig"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-9.2.2-vtkGeometryFilter-add-missing-mutex-header-file.patch
+	"${FILESDIR}"/${PN}-9.2.2-VTKm-respect-user-CXXFLAGS.patch
+	"${FILESDIR}"/${PN}-9.2.2-link-with-glut-library-for-freeglut.patch
+)
+
+DOCS=( CONTRIBUTING.md README.md )
+
+vtk_check_reqs() {
+	local dsk=4096
+	local mem=$(( $(usex cuda 7168 0) ))
+
+	dsk=$(( $(usex doc 3072 0) + ${dsk} ))
+	dsk=$(( $(usex examples 3072 0) + ${dsk} ))
+	dsk=$(( $(usex cuda 8192 0) + ${dsk} ))
+
+	# In case users are not aware of the extra NINJAOPTS, check
+	# for the more common MAKEOPTS, in case NINJAOPTS is empty
+	local jobs=1
+	if [[ -n "${NINJAOPTS}" ]]; then
+		jobs=$(makeopts_jobs "${NINJAOPTS}" "$(get_nproc)")
+	else
+		if [[ -n "${MAKEOPTS}" ]]; then
+			jobs=$(makeopts_jobs "${MAKEOPTS}" "$(get_nproc)")
+		fi
+	fi
+	mem=$(( ${mem} * ${jobs} ))
+
+	use cuda && export CHECKREQS_MEMORY=${mem}M
+	export CHECKREQS_DISK_BUILD=${dsk}M
+
+	check-reqs_pkg_${EBUILD_PHASE}
+}
+
+pkg_pretend() {
+	[[ ${MERGE_TYPE} != binary ]] && has openmp && tc-check-openmp
+
+	if [[ $(tc-is-gcc) && $(gcc-majorversion) = 11 ]] && use cuda ; then
+		# FIXME: better use eerror?
+		ewarn "GCC 11 is know to fail building with CUDA support in some cases."
+		ewarn "See bug #820593"
+	fi
+
+	if use qt6 && use qt5; then
+		ewarn "Both qt5 and qt6 USE flags have been selected. Using qt5!"
+	fi
+
+	vtk_check_reqs
+}
+
+pkg_setup() {
+	[[ ${MERGE_TYPE} != binary ]] && has openmp && tc-check-openmp
+
+	if [[ $(tc-is-gcc) && $(gcc-majorversion) = 11 ]] && use cuda ; then
+		# FIXME: better use eerror?
+		ewarn "GCC 11 is know to fail building with CUDA support in some cases."
+		ewarn "See bug #820593"
+	fi
+
+	if use qt6 && use qt5; then
+		ewarn "Both qt5 and qt6 USE flags have been selected. Using qt5!"
+	fi
+
+	vtk_check_reqs
+
+	use java && java-pkg-opt-2_pkg_setup
+	use python && python-single-r1_pkg_setup
+	use web && webapp_pkg_setup
+}
+
+# Note: The following libraries are marked as internal by kitware
+#	and can currently not unbundled:
+#	diy2, exodusII, fides, h5part, kissfft, loguru, verdict, vpic,
+#	vtkm, xdmf{2,3}, zfp
+# Note: no valid mpi4py target found with system library --> CHECK!!
+# TODO: cli11 (::guru), exprtk, ioss
+# Note: As of v9.2.2 we no longer drop bundled libraries, when using system
+# libraries. This just saves a little space. CMake logic of VTK on ThirdParty
+# libraries avoids automagic builds, so deletion is not needed to catch these.
+src_prepare() {
+	if use doc; then
+		einfo "Removing .md5 files from documents."
+		rm -f "${WORKDIR}"/html/*.md5 || die "Failed to remove superfluous hashes"
+		sed -e "s|\${VTK_BINARY_DIR}/Utilities/Doxygen/doc|${WORKDIR}|" \
+			-i Utilities/Doxygen/CMakeLists.txt || die
+	fi
+
+	cmake_src_prepare
+
+	if use cuda; then
+		cuda_add_sandbox -w
+		cuda_src_prepare
+	fi
+
+	if use test; then
+		ebegin "Copying data files to ${BUILD_DIR}"
+		mkdir -p "${BUILD_DIR}/ExternalData" || die
+		pushd "${BUILD_DIR}/ExternalData" >/dev/null || die
+		ln -sf ../../VTK-${PV}/.ExternalData/README.rst . || die
+		ln -sf ../../VTK-${PV}/.ExternalData/SHA512 . || die
+		popd >/dev/null || die
+		eend "$?"
+	fi
+}
+
+# TODO: check these and consider to use them
+#	VTK_BUILD_SCALED_SOA_ARRAYS
+#	VTK_DISPATCH_{AOS,SOA,TYPED}_ARRAYS
+src_configure() {
+	local mycmakeargs=(
+		-DCMAKE_INSTALL_LICENSEDIR="share/${PN}/licenses"
+
+		-DVTK_ANDROID_BUILD=OFF
+		-DVTK_IOS_BUILD=OFF
+
+		-DVTK_BUILD_ALL_MODULES=$(usex all-modules ON OFF)
+		# we use the pre-built documentation and install these with USE=doc
+		-DVTK_BUILD_DOCUMENTATION=OFF
+		-DVTK_BUILD_EXAMPLES=$(usex examples ON OFF)
+
+		# no package in the tree: https://github.com/LLNL/conduit
+		-DVTK_ENABLE_CATALYST=OFF
+		-DVTK_ENABLE_KITS=OFF
+		-DVTK_ENABLE_LOGGING=$(usex logging ON OFF)
+		# defaults to ON: USE flag for this?
+		-DVTK_ENABLE_REMOTE_MODULES=OFF
+
+		-DVTK_GROUP_ENABLE_Imaging=$(usex imaging "YES" "DEFAULT")
+		-DVTK_GROUP_ENABLE_Rendering=$(usex rendering "YES" "DEFAULT")
+		-DVTK_GROUP_ENABLE_StandAlone="YES"
+		-DVTK_GROUP_ENABLE_Views=$(usex views "YES" "DEFAULT")
+		-DVTK_GROUP_ENABLE_Web=$(usex web "YES" "DEFAULT")
+
+		-DVTK_INSTALL_SDK=ON
+
+		-DVTK_MODULE_ENABLE_VTK_IOCGNSReader="WANT"
+		-DVTK_MODULE_ENABLE_VTK_IOExportPDF="WANT"
+		-DVTK_MODULE_ENABLE_VTK_IOLAS=$(usex las "WANT" "DEFAULT")
+		-DVTK_MODULE_ENABLE_VTK_IONetCDF="WANT"
+		-DVTK_MODULE_ENABLE_VTK_IOOggTheora="WANT"
+		-DVTK_MODULE_ENABLE_VTK_IOOpenVDB=$(usex openvdb "WANT" "DEFAULT")
+		-DVTK_MODULE_ENABLE_VTK_IOSQL="WANT" # sqlite
+		-DVTK_MODULE_ENABLE_VTK_IOPDAL=$(usex pdal "WANT" "DEFAULT")
+		-DVTK_MODULE_ENABLE_VTK_IOXML="WANT"
+		-DVTK_MODULE_ENABLE_VTK_IOXMLParser="WANT"
+		-DVTK_MODULE_ENABLE_VTK_RenderingFreeType=$(usex freetype "WANT" "DEFAULT")
+		-DVTK_MODULE_ENABLE_VTK_RenderingFreeTypeFontConfig=$(usex freetype "WANT" "DEFAULT")
+		-DVTK_MODULE_ENABLE_VTK_cgns="WANT"
+		-DVTK_MODULE_ENABLE_VTK_doubleconversion="WANT"
+		-DVTK_MODULE_ENABLE_VTK_eigen="WANT"
+		-DVTK_MODULE_ENABLE_VTK_expat="WANT"
+		-DVTK_MODULE_ENABLE_VTK_fmt="WANT"
+		-DVTK_MODULE_ENABLE_VTK_freetype="WANT"
+		-DVTK_MODULE_ENABLE_VTK_hdf5="WANT"
+		-DVTK_MODULE_ENABLE_VTK_jpeg="WANT"
+		-DVTK_MODULE_ENABLE_VTK_jsoncpp="WANT"
+		-DVTK_MODULE_ENABLE_VTK_libharu="WANT"
+		-DVTK_MODULE_ENABLE_VTK_libproj="WANT"
+		-DVTK_MODULE_ENABLE_VTK_libxml2="WANT"
+		-DVTK_MODULE_ENABLE_VTK_lz4="WANT"
+		-DVTK_MODULE_ENABLE_VTK_lzma="WANT"
+		-DVTK_MODULE_ENABLE_VTK_netcdf="WANT"
+		-DVTK_MODULE_ENABLE_VTK_nlohmannjson="WANT"
+		-DVTK_MODULE_ENABLE_VTK_ogg="WANT"
+		-DVTK_MODULE_ENABLE_VTK_pegtl="WANT"
+		-DVTK_MODULE_ENABLE_VTK_png="WANT"
+		-DVTK_MODULE_ENABLE_VTK_pugixml="WANT"
+		-DVTK_MODULE_ENABLE_VTK_sqlite="WANT"
+		-DVTK_MODULE_ENABLE_VTK_theora="WANT"
+		-DVTK_MODULE_ENABLE_VTK_tiff="WANT"
+		-DVTK_MODULE_ENABLE_VTK_utf8="WANT"
+		-DVTK_MODULE_ENABLE_VTK_vtkm=$(usex vtkm "WANT" "DEFAULT")
+		-DVTK_MODULE_ENABLE_VTK_zlib="WANT"
+
+		# not packaged in Gentoo
+		-DVTK_MODULE_USE_EXTERNAL_VTK_exprtk=OFF
+		-DVTK_MODULE_USE_EXTERNAL_VTK_ioss=OFF
+		-DVTK_MODULE_USE_EXTERNAL_VTK_verdict=OFF
+
+		-DVTK_RELOCATABLE_INSTALL=ON
+
+		-DVTK_SMP_ENABLE_OPENMP=$(usex openmp ON OFF)
+		-DVTK_SMP_ENABLE_STDTHREAD=$(usex threads ON OFF)
+		-DVTK_SMP_ENABLE_TBB=$(usex tbb ON OFF)
+
+		-DVTK_UNIFIED_INSTALL_TREE=ON
+
+		-DVTK_USE_CUDA=$(usex cuda ON OFF)
+		# use system libraries where possible
+		-DVTK_USE_EXTERNAL=ON
+		# avoid finding package from either ::guru or ::sci
+		-DVTK_USE_MEMKIND=OFF
+		-DVTK_USE_MPI=$(usex mpi ON OFF)
+		-DVTK_USE_TK=$(usex tk ON OFF)
+		-DVTK_USE_X=ON
+
+		-DVTK_WHEEL_BUILD=OFF
+
+		-DVTK_WRAP_JAVA=$(usex java ON OFF)
+		-DVTK_WRAP_PYTHON=$(usex python ON OFF)
+	)
+
+	if use all-modules; then
+		mycmakeargs+=(
+			# no package in ::gentoo
+			-DVTK_ENABLE_OSPRAY=OFF
+			# TODO: some of these are tied to the VTK_ENABLE_REMOTE_MODULES
+			# option. Check whether we can download them clean and enable
+			# them.
+			-DVTK_MODULE_ENABLE_VTK_DomainsMicroscopy="NO"
+			-DVTK_MODULE_ENABLE_VTK_fides="NO"
+			-DVTK_MODULE_ENABLE_VTK_FiltersOpenTURNS="NO"
+			-DVTK_MODULE_ENABLE_VTK_IOADIOS2="NO"
+			-DVTK_MODULE_ENABLE_VTK_IOFides="NO"
+
+			-DVTK_MODULE_ENABLE_VTK_RenderingOpenVR="NO"
+			-DVTK_MODULE_ENABLE_VTK_RenderingOpenXR="NO"
+
+			# available in ::guru, so avoid  detection if installed
+			-DVTK_MODULE_USE_EXTERNAL_VTK_cli11=OFF
+		)
+	fi
+
+	if use boost; then
+		mycmakeargs+=(
+			-DVTK_MODULE_ENABLE_VTK_InfovisBoost="WANT"
+			-DVTK_MODULE_ENABLE_VTK_InfovisBoostGraphAlgorithms="WANT"
+		)
+	fi
+
+	# TODO: checks this on updates of nvidia-cuda-toolkit and update
+	# the list of available arches if necessary, i.e. add new arches
+	# once they are released at the end of the list before all.
+	# See https://en.wikipedia.org/wiki/CUDA#GPUs_supported
+	if use cuda; then
+		local cuda_arch=
+		case ${VTK_CUDA_ARCH:-native} in
+			# we ignore fermi arch, because current nvidia-cuda-toolkit-11*
+			# no longer supports it
+			kepler|maxwell|pascal|volta|turing|ampere|all)
+				cuda_arch=${VTK_CUDA_ARCH}
+				;;
+			native)
+				ewarn "If auto detection fails for you, please try and export the"
+				ewarn "VTK_CUDA_ARCH environment variable to one of the common arch"
+				ewarn "names: kepler, maxwell, pascal, volta, turing, ampere or all."
+				cuda_arch=native
+				;;
+			*)
+				eerror "Please properly set the VTK_CUDA_ARCH environment variable to"
+				eerror "one of: kepler, maxwell, pascal, volta, turing, ampere, all"
+				die "Invalid CUDA architecture given: '${VTK_CUDA_ARCH}'!"
+				;;
+		esac
+		ewarn "Using CUDA architecture '${cuda_arch}'"
+
+		mycmakeargs+=( -DVTKm_CUDA_Architecture=${cuda_arch} )
+	fi
+
+	if use debug; then
+		mycmakeargs+=(
+			-DVTK_DEBUG_LEAKS=ON
+			-DVTK_DEBUG_MODULE=ON
+			-DVTK_DEBUG_MODULE_ALL=ON
+			-DVTK_ENABLE_SANITIZER=ON
+			-DVTK_EXTRA_COMPILER_WARNINGS=ON
+			-DVTK_WARN_ON_DISPATCH_FAILURE=ON
+		)
+		if use rendering; then
+			mycmakeargs+=( -DVTK_OPENGL_ENABLE_STREAM_ANNOTATIONS=ON )
+		fi
+	fi
+
+	if use examples || use test; then
+		mycmakeargs+=( -DVTK_USE_LARGE_DATA=ON )
+	fi
+
+	if use ffmpeg; then
+		mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_IOFFMPEG="WANT" )
+		if use rendering; then
+			mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_RenderingFFMPEGOpenGL2="WANT" )
+		fi
+	fi
+
+	if use gdal; then
+		mycmakeargs+=(
+			-DVTK_MODULE_ENABLE_VTK_GeovisGDAL="WANT"
+			-DVTK_MODULE_ENABLE_VTK_IOGDAL="WANT"
+			-DVTK_MODULE_ENABLE_VTK_IOGeoJSON="WANT"
+		)
+	fi
+
+	if use imaging; then
+		mycmakeargs+=(
+			-DVTK_MODULE_ENABLE_VTK_ImagingColor="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingCore="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingFourier="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingGeneral="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingHybrid="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingMath="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingMorphological="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingOpenGL2="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingSources="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingStatistics="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ImagingStencil="WANT"
+		)
+		use rendering && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_RenderingImage="WANT" )
+	fi
+
+	if ! use java && ! use python; then
+		# defaults to ON
+		mycmakeargs+=( -DVTK_ENABLE_WRAPPING=OFF )
+	fi
+
+	if use java; then
+		mycmakeargs+=(
+			-DCMAKE_INSTALL_JARDIR="share/${PN}"
+			-DVTK_ENABLE_WRAPPING=ON
+			-DVTK_MODULE_ENABLE_VTK_Java="WANT"
+		)
+	fi
+
+	if use mpi; then
+		mycmakeargs+=(
+			-DVTK_GROUP_ENABLE_MPI="YES"
+			-DVTK_MODULE_ENABLE_VTK_IOH5part="WANT"
+			-DVTK_MODULE_ENABLE_VTK_IOMPIParallel="WANT"
+			-DVTK_MODULE_ENABLE_VTK_IOParallel="WANT"
+			-DVTK_MODULE_ENABLE_VTK_IOParallelNetCDF="WANT"
+			-DVTK_MODULE_ENABLE_VTK_IOParallelXML="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ParallelMPI="WANT"
+			-DVTK_MODULE_ENABLE_VTK_h5part="WANT"
+			-DVTK_MODULE_USE_EXTERNAL_VTK_verdict=OFF
+		)
+		use imaging && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_IOMPIImage="WANT" )
+		use python && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_ParallelMPI4Py="WANT" )
+		if use rendering; then
+			mycmakeargs+=(
+				-DVTK_MODULE_ENABLE_VTK_RenderingParallel="WANT"
+				-DVTK_MODULE_ENABLE_VTK_RenderingParallelLIC="WANT"
+			)
+		fi
+		use vtkm && mycmakeargs+=( -DVTKm_ENABLE_MPI=ON )
+	else
+		mycmakeargs+=( -DVTK_GROUP_ENABLE_MPI="NO" )
+	fi
+
+	use mysql && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_IOMySQL="WANT" )
+	use odbc && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_IOODBC="WANT" )
+	use openvdb && mycmakeargs+=( -DOpenVDB_CMAKE_PATH="${ESYSROOT}/usr/$(get_libdir)/cmake/OpenVDB" )
+	use postgres && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_IOPostgreSQL="WANT" )
+
+	if use python; then
+		mycmakeargs+=(
+			-DPython3_EXECUTABLE="${PYTHON}"
+			-DVTK_ENABLE_WRAPPING=ON
+			-DVTK_MODULE_ENABLE_VTK_Python="WANT"
+			-DVTK_MODULE_ENABLE_VTK_PythonInterpreter="WANT"
+			-DVTK_MODULE_ENABLE_VTK_WrappingPythonCore="WANT"
+			-DVTK_PYTHON_SITE_PACKAGES_SUFFIX="lib/${EPYTHON}/site-packages"
+		)
+		use rendering && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_PythonContext2D="WANT" )
+	fi
+
+	if use qt5 && use qt6; then
+		# prefer Qt5: https://wiki.gentoo.org/wiki/Project:qt/Policies
+		mycmakeargs+=(
+			-DCMAKE_INSTALL_QMLDIR="${EPREFIX}/usr/$(get_libdir)/qt5/qml"
+			-DVTK_QT_VERSION="5"
+		)
+	else
+		if use qt5; then
+			mycmakeargs+=(
+				-DCMAKE_INSTALL_QMLDIR="${EPREFIX}/usr/$(get_libdir)/qt5/qml"
+				-DVTK_QT_VERSION="5"
+			)
+		elif use qt6; then
+			mycmakeargs+=(
+				-DCMAKE_INSTALL_QMLDIR="${EPFREIX}/usr/$(get_libdir)/qt6/qml"
+				-DVTK_QT_VERSION="6"
+			)
+		else
+			mycmakeargs+=( -DVTK_GROUP_ENABLE_Qt="NO" )
+		fi
+	fi
+
+	if use qt5 || use qt6; then
+		mycmakeargs+=(
+			-DVTK_GROUP_ENABLE_Qt:STRING="YES"
+			-DVTK_MODULE_ENABLE_VTK_GUISupportQt="WANT"
+			-DVTK_MODULE_ENABLE_VTK_GUISupportQtQuick="WANT"
+		)
+		if use mysql || use postgres; then
+			mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_GUISupportQtSQL="WANT" )
+		fi
+		if use rendering; then
+			mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_RenderingQt="WANT" )
+		fi
+		if use views; then
+			mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_ViewsQt="WANT" )
+		fi
+	fi
+
+	if use rendering; then
+		mycmakeargs+=(
+			-DVTK_ENABLE_OSPRAY=OFF
+
+			-DVTK_MODULE_ENABLE_VTK_IOExportGL2PS="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingAnnotation="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingContext2D="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingContextOpenGL2="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingCore="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingExternal="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingGL2PSOpenGL2="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingHyperTreeGrid="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingLICOpenGL2="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingLOD="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingLabel="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingMatplotlib="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingOpenGL2="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingRayTracing="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingSceneGraph="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingUI="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingVolume="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingVolumeAMR="WANT"
+			-DVTK_MODULE_ENABLE_VTK_RenderingVolumeOpenGL2="WANT"
+			-DVTK_MODULE_ENABLE_VTK_gl2ps="WANT"
+			-DVTK_MODULE_ENABLE_VTK_glew="WANT"
+			-DVTK_MODULE_ENABLE_VTK_opengl="WANT"
+
+			-DVTK_USE_SDL2=$(usex sdl "YES" "NO")
+		)
+		use tk && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_RenderingTk="WANT" )
+		use views && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_ViewsContext2D="WANT" )
+		use web && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_RenderingVtkJS="WANT" )
+	fi
+
+	if use test; then
+		ewarn "Testing requires VTK_FORBID_DOWNLOADS=OFF by upstream."
+		ewarn "Care has been taken to pre-download all required files."
+		ewarn "In case you find missing files, please inform me."
+		mycmakeargs+=(
+			-DVTK_BUILD_TESTING=ON
+			-DVTK_FORBID_DOWNLOADS=OFF
+
+			# requested even if all use flags are off
+			-DVTK_MODULE_ENABLE_VTK_octree="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ViewsCore="WANT"
+
+			# available in ::guru, so avoid  detection if installed
+			-DVTK_MODULE_USE_EXTERNAL_VTK_cli11=OFF
+		)
+	else
+		mycmakeargs+=(
+			-DVTK_BUILD_TESTING=OFF
+			-DVTK_FORBID_DOWNLOADS=ON
+		)
+	fi
+
+	# FIXME: upstream provides 4 threading models, as of 9.1.0. These are
+	# sequential, stdthread, openmp and tbb. AFAICS all of them can be
+	# enabled at the same time. Sequential and Stdthread are enabled by
+	# default. The default selected type for the build is sequential.
+	# Assuming sequential < stdpthread < openmp < tbb wrt speed, although
+	# this is dependent on the actual scenario where threading is used.
+	if use tbb; then
+		mycmakeargs+=( -DVTK_SMP_IMPLEMENTATION_TYPE="TBB" )
+	elif use openmp; then
+		mycmakeargs+=( -DVTK_SMP_IMPLEMENTATION_TYPE="OpenMP" )
+	elif use threads; then
+		mycmakeargs+=( -DVTK_SMP_IMPLEMENTATION_TYPE="STDThread" )
+	else
+		mycmakeargs+=( -DVTK_SMP_IMPLEMENTATION_TYPE="Sequential" )
+	fi
+
+	use tk && mycmakeargs+=( -DVTK_GROUP_ENABLE_Tk="YES" )
+
+	if use views; then
+		mycmakeargs+=(
+			-DVTK_MODULE_ENABLE_VTK_ViewsCore="WANT"
+			-DVTK_MODULE_ENABLE_VTK_ViewsInfovis="WANT"
+		)
+	fi
+
+	if use vtkm; then
+		mycmakeargs+=(
+			-DVTK_MODULE_ENABLE_VTK_AcceleratorsVTKmCore="WANT"
+			-DVTK_MODULE_ENABLE_VTK_AcceleratorsVTKmDataModel="WANT"
+			-DVTK_MODULE_ENABLE_VTK_AcceleratorsVTKmFilters="WANT"
+
+#			-DVTKm_ENABLE_DEVELOPER_FLAGS=OFF
+#			-DVTKm_ENABLE_HDF5_IO=ON
+
+			-DVTKm_NO_INSTALL_README_LICENSE=ON # bug #793221
+			-DVTKm_Vectorization=native
+		)
+	fi
+
+	if use web; then
+		mycmakeargs+=(
+			-DVTK_MODULE_ENABLE_VTK_WebCore="WANT"
+			-DVTK_MODULE_ENABLE_VTK_WebGLExporter="WANT"
+		)
+		use python && mycmakeargs+=( -DVTK_MODULE_ENABLE_VTK_WebPython="WANT" )
+	fi
+
+	use java && export JAVA_HOME="${EPREFIX}/etc/java-config-2/current-system-vm"
+
+# FIXME: looks like it's not needed, builts with USE=mpi and gcc
+#	if use mpi; then
+#		export CC=mpicc
+#		export CXX=mpicxx
+#		export FC=mpif90
+#		export F90=mpif90
+#		export F77=mpif77
+#	fi
+
+	cmake_src_configure
+}
+
+# FIXME: avoid nonfatal?
+# see https://github.com/gentoo/gentoo/pull/22878#discussion_r747204043
+src_test() {
+#	nonfatal virtx cmake_src_test
+	virtx cmake_src_test
+}
+
+src_install() {
+	use web && webapp_src_preinst
+
+	# Stop web page images from being compressed
+	if use doc; then
+		HTML_DOCS=( "${WORKDIR}/html/." )
+	fi
+
+	cmake_src_install
+
+	use java && java-pkg_regjar "${ED}"/usr/share/${PN}/${PN}.jar
+
+	# install examples
+	if use examples; then
+		einfo "Installing examples"
+		mv -v {E,e}xamples || die
+		dodoc -r examples
+		docompress -x /usr/share/doc/${PF}/examples
+
+		einfo "Installing datafiles"
+		insinto /usr/share/${PN}/data
+		doins -r "${S}/.ExternalData"
+	fi
+
+	use python && python_optimize
+
+	use web && webapp_src_install
+}
+
+# webapp.eclass exports these but we want it optional #534036
+pkg_postinst() {
+	use web && webapp_pkg_postinst
+
+	if use examples; then
+		einfo "You can get more and updated examples at"
+		einfo "https://kitware.github.io/vtk-examples/site/"
+	fi
+}
+
+pkg_prerm() {
+	use web && webapp_pkg_prerm
+}