sci-libs/lapack: new ebuild for lapack that enables runtime switching.

This ebuild replaces {blas,cblas,lapack,lapacke}-reference ebuild
files.

Closes: https://github.com/gentoo/gentoo/pull/12319

Signed-off-by: Mo Zhou <cdluminate@gmail.com>
Signed-off-by: Benda Xu <heroxbd@gentoo.org>

3 files changed, 117 insertions, 0 deletions

diff --git a/sci-libs/lapack/Manifest b/sci-libs/lapack/Manifest
new file mode 100644
index 000000000000..fe865c2bdc84
--- /dev/null
+++ b/sci-libs/lapack/Manifest
@@ -0,0 +1 @@
+DIST lapack-3.8.0.tar.gz 7426094 BLAKE2B 27cd75eea498250382b2df6f5d7dc95fdee8d37b1a0faba5296ca0145ec40a1165a4ecc727aa1647086be6783b50cf475f79cea0f30f541da789051db99b2f37 SHA512 17786cb7306fccdc9b4a242de7f64fc261ebe6a10b6ec55f519deb4cb673cb137e8742aa5698fd2dc52f1cd56d3bd116af3f593a01dcf6770c4dcc86c50b2a7f
diff --git a/sci-libs/lapack/lapack-3.8.0.ebuild b/sci-libs/lapack/lapack-3.8.0.ebuild
new file mode 100644
index 000000000000..df848e027d54
--- /dev/null
+++ b/sci-libs/lapack/lapack-3.8.0.ebuild
@@ -0,0 +1,88 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+CMAKE_MAKEFILE_GENERATOR=emake
+inherit cmake-utils
+
+DESCRIPTION="BLAS,CBLAS,LAPACK,LAPACKE reference implementations"
+HOMEPAGE="http://www.netlib.org/lapack/"
+SRC_URI="http://www.netlib.org/${PN}/${P}.tar.gz"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sparc ~x86"
+IUSE="lapacke doc"
+# TODO: static-libs 64bit-index
+
+RDEPEND="
+	>=app-eselect/eselect-blas-0.2
+	>=app-eselect/eselect-lapack-0.2
+	!app-eselect/eselect-cblas
+	!sci-libs/blas-reference
+	!sci-libs/cblas-reference
+	!sci-libs/lapack-reference
+	!sci-libs/lapacke-reference
+	doc? ( app-doc/blas-docs )
+	virtual/pkgconfig"
+DEPEND="${RDEPEND}
+	virtual/fortran"
+
+src_configure() {
+	local mycmakeargs=(
+		-DCBLAS=ON
+		-DLAPACKE=$(usex lapacke)
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}"/usr
+		-DBUILD_SHARED_LIBS=ON
+	)
+	cmake-utils_src_configure
+}
+
+src_install () {
+	cmake-utils_src_install
+
+	# Create private lib directory for eselect::blas (ld.so.conf)
+	dodir /usr/$(get_libdir)/blas/reference
+	dosym ../../libblas.so usr/$(get_libdir)/blas/reference/libblas.so
+	dosym ../../libblas.so.3 usr/$(get_libdir)/blas/reference/libblas.so.3
+	dosym ../../libcblas.so usr/$(get_libdir)/blas/reference/libcblas.so
+	dosym ../../libcblas.so.3 usr/$(get_libdir)/blas/reference/libcblas.so.3
+
+	# Create private lib directory for eselect::lapack (ld.so.conf)
+	dodir /usr/$(get_libdir)/lapack/reference
+	dosym ../../liblapack.so usr/$(get_libdir)/lapack/reference/liblapack.so
+	dosym ../../liblapack.so.3 usr/$(get_libdir)/lapack/reference/liblapack.so.3
+}
+
+pkg_postinst () {
+	local me=reference libdir=$(get_libdir)
+
+	# check eselect-blas
+	eselect blas add ${libdir} "${EROOT}"/usr/${libdir}/blas/${me} ${me}
+	local current_blas=$(eselect blas show ${libdir} | cut -d' ' -f2)
+	if [[ ${current_blas} == ${me} || -z ${current_blas} ]]; then
+		eselect blas set ${libdir} ${me}
+		elog "Current eselect: BLAS ($libdir) -> [${current_blas}]."
+	else
+		elog "Current eselect: BLAS ($libdir) -> [${current_blas}]."
+		elog "To use blas [${me}] implementation, you have to issue (as root):"
+		elog "\t eselect blas set ${libdir} ${me}"
+	fi
+
+	# check eselect-lapack
+	eselect lapack add ${libdir} "${EROOT}"/usr/${libdir}/lapack/${me} ${me}
+	local current_lapack=$(eselect lapack show ${libdir} | cut -d' ' -f2)
+	if [[ ${current_lapack} == ${me} || -z ${current_lapack} ]]; then
+		eselect lapack set ${libdir} ${me}
+		elog "Current eselect: LAPACK ($libdir) -> [${current_lapack}]."
+	else
+		elog "Current eselect: LAPACK ($libdir) -> [${current_lapack}]."
+		elog "To use lapack [${me}] implementation, you have to issue (as root):"
+		elog "\t eselect lapack set ${libdir} ${me}"
+	fi
+}
+
+pkg_postrm () {
+	eselect blas validate
+	eselect lapack validate
+}
diff --git a/sci-libs/lapack/metadata.xml b/sci-libs/lapack/metadata.xml
new file mode 100644
index 000000000000..7b291ef6bfd9
--- /dev/null
+++ b/sci-libs/lapack/metadata.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer type="project">
+    <email>sci@gentoo.org</email>
+    <name>Gentoo Science Project</name>
+  </maintainer>
+  <longdescription lang="en">
+The BLAS (Basic Linear Algebra Subprograms) are high quality "building
+block" routines for performing basic vector and matrix operations. Level 1
+BLAS do vector-vector operations, Level 2 BLAS do matrix-vector operations,
+and Level 3 BLAS do matrix-matrix operations. Because the BLAS are
+efficient, portable, and widely available, they're commonly used in the
+development of high quality linear algebra software, LAPACK for
+example. This packages implements the reference FORTRAN 77 library,
+the reference C library as a wrapper to the FORTRAN 77 BLAS library.
+
+LAPACK is a comprehensive library that does linear algebra
+operations including matrix inversions, least squared solutions to
+linear sets of equations, eigenvector analysis, singular value
+decomposition, etc. It is a very comprehensive and reputable package
+that has found extensive use in the scientific community.
+This package installs the reference FORTRAN 77 implementation from Netlib.
+  </longdescription>
+  <use>
+    <flag name="lapacke">Build LAPACKE</flag>
+  </use>
+</pkgmetadata>