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# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI="7"

inherit flag-o-matic fortran-2 toolchain-funcs

DESCRIPTION="Jacobi-Davidson type method for the generalized standard eigenvalue problem."
HOMEPAGE="https://www.win.tue.nl/casa/research/scientificcomputing/topics/jd/software.html"
SRC_URI="https://www.win.tue.nl/casa/research/scientificcomputing/topics/jd/${PN}.tar.gz -> ${P}.tar.gz"

LICENSE="GPL-3"
SLOT="0"
KEYWORDS="~amd64"
IUSE="doc"

# virtual/lapack does not pull in [deprecated] so we have to deal with this mess like this until it does
DEPEND="
	virtual/blas
	virtual/lapack
	|| ( sci-libs/openblas sci-libs/lapack[deprecated] )
"
RDEPEND="${DEPEND}"
BDEPEND="doc? ( dev-texlive/texlive-latex )"

PATCHES=( "${FILESDIR}/makefile.patch" )

S="${WORKDIR}/${PN}"

src_prepare() {
	libs="$($(tc-getPKG_CONFIG) --libs blas)"
	libs+=" $($(tc-getPKG_CONFIG) --libs lapack)"
	append-fflags "${libs}"
	default
}

src_compile() {
	if use doc; then
		pdflatex manual.tex || die
	fi

	cd "jdlib" || die
	emake
	ln -s libjdqz.so.0 libjdqz.so || die
}

src_test() {
	cd "jdtest" || die
	emake
	cd ".." || die
	LD_LIBRARY_PATH="./jdlib" ./jdtest/example || die
}

src_install() {
	dolib.so jdlib/libjdqz.so
	dolib.so jdlib/libjdqz.so.0

	use doc && dodoc manual.pdf
}