dev-cpp/eigen: EAPI-7 bump, switch to cmake.eclass

- Update HOMEPAGE
- Drop IUSE="c++11", build was broken anyway with it disabled
- Drop obsolete slot 0 blocker
- Sort dependencies
- Drop useless src_unpack(), just define ${S} instead
- Properly configure CMAKEPACKAGE_INSTALL_DIR instead of manual doins
- configure in src_configure, compile in src_compile, drop src_test()
- Drop obsolete -g2 removal
- Consolidate and improve conditional !test seds
- Replace CMAKE_BUILD_TYPE override sed with patch
- Change FindEigen3.cmake module install path

Package-Manager: Portage-3.0.0, Repoman-2.3.23
Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

2 files changed, 124 insertions, 0 deletions

diff --git a/dev-cpp/eigen/eigen-3.3.7-r1.ebuild b/dev-cpp/eigen/eigen-3.3.7-r1.ebuild
new file mode 100644
index 000000000000..ed987bda82b2
--- /dev/null
+++ b/dev-cpp/eigen/eigen-3.3.7-r1.ebuild
@@ -0,0 +1,100 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+FORTRAN_NEEDED="test"
+inherit cmake cuda fortran-2
+
+DESCRIPTION="C++ template library for linear algebra"
+HOMEPAGE="http://eigen.tuxfamily.org/index.php?title=Main_Page"
+SRC_URI="https://bitbucket.org/eigen/eigen/get/${PV}.tar.bz2 -> ${P}.tar.bz2"
+
+LICENSE="MPL-2.0"
+SLOT="3"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~x86 ~amd64-linux ~x86-linux"
+IUSE="cpu_flags_arm_neon cpu_flags_ppc_altivec cpu_flags_ppc_vsx cuda debug doc openmp test" #zvector
+
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	doc? (
+		app-doc/doxygen[dot]
+		dev-texlive/texlive-bibtexextra
+		dev-texlive/texlive-fontsextra
+		dev-texlive/texlive-fontutils
+		dev-texlive/texlive-latex
+		dev-texlive/texlive-latexextra
+	)
+	test? ( virtual/pkgconfig )
+"
+DEPEND="
+	cuda? ( dev-util/nvidia-cuda-toolkit )
+	test? (
+		dev-libs/gmp:0
+		dev-libs/mpfr:0
+		media-libs/freeglut
+		media-libs/glew
+		sci-libs/adolc[sparse]
+		sci-libs/cholmod
+		sci-libs/fftw:3.0
+		sci-libs/pastix
+		sci-libs/scotch
+		sci-libs/spqr
+		sci-libs/superlu
+		sci-libs/umfpack
+		virtual/opengl
+	)
+"
+# Missing:
+# METIS-5
+# GOOGLEHASH
+
+S="${WORKDIR}/${PN}-${PN}-323c052e1731"
+
+PATCHES=( "${FILESDIR}"/${P}-gentoo-cmake.patch )
+
+src_prepare() {
+	cmake_src_prepare
+
+	cmake_comment_add_subdirectory demos
+
+	if ! use test; then
+		sed -e "/add_subdirectory(test/s/^/#DONOTCOMPILE /g" \
+			-e "/add_subdirectory(blas/s/^/#DONOTCOMPILE /g" \
+			-e "/add_subdirectory(lapack/s/^/#DONOTCOMPILE /g" \
+			-i CMakeLists.txt || die
+	fi
+
+	use cuda && cuda_src_prepare
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DCMAKEPACKAGE_INSTALL_DIR="${EPREFIX}"/usr/$(get_libdir)/cmake/${PN}${SLOT}
+	)
+	use test && mycmakeargs+=(
+		-DEIGEN_TEST_CXX11=ON
+		-DEIGEN_TEST_NOQT=ON
+		-DEIGEN_TEST_ALTIVEC=$(usex cpu_flags_ppc_altivec)
+		-DEIGEN_TEST_CUDA=$(usex cuda)
+		-DEIGEN_TEST_OPENMP=$(usex openmp)
+		-DEIGEN_TEST_NEON64=$(usex cpu_flags_arm_neon)
+		-DEIGEN_TEST_VSX=$(usex cpu_flags_ppc_vsx)
+	)
+	cmake_src_configure
+}
+
+src_compile() {
+	cmake_src_compile
+	use doc && cmake_src_compile doc
+	if use test; then
+		cmake_src_compile blas
+		cmake_src_compile buildtests
+	fi
+}
+
+src_install() {
+	use doc && local HTML_DOCS=( "${BUILD_DIR}"/doc/html/. )
+	cmake_src_install
+}
diff --git a/dev-cpp/eigen/files/eigen-3.3.7-gentoo-cmake.patch b/dev-cpp/eigen/files/eigen-3.3.7-gentoo-cmake.patch
new file mode 100644
index 000000000000..0389cd3b9333
--- /dev/null
+++ b/dev-cpp/eigen/files/eigen-3.3.7-gentoo-cmake.patch
@@ -0,0 +1,24 @@
+Let us properly override with CMAKE_BUILD_TYPE=Gentoo
+
+--- a/CMakeLists.txt	2018-12-11 18:57:55.000000000 +0100
++++ b/CMakeLists.txt	2020-07-21 16:43:33.467680534 +0200
+@@ -14,18 +14,7 @@
+ set(Eigen_BINARY_DIR ${Eigen3_BINARY_DIR})
+ 
+ # guard against bad build-type strings
+-
+-if (NOT CMAKE_BUILD_TYPE)
+-  set(CMAKE_BUILD_TYPE "Release")
+-endif()
+-
+-string(TOLOWER "${CMAKE_BUILD_TYPE}" cmake_build_type_tolower)
+-if(    NOT cmake_build_type_tolower STREQUAL "debug"
+-   AND NOT cmake_build_type_tolower STREQUAL "release"
+-   AND NOT cmake_build_type_tolower STREQUAL "relwithdebinfo")
+-  message(FATAL_ERROR "Unknown build type \"${CMAKE_BUILD_TYPE}\". Allowed values are Debug, Release, RelWithDebInfo (case-insensitive).")
+-endif()
+-
++# yeah no.
+ 
+ #############################################################################
+ # retrieve version infomation                                               #