From f33e9d3ef4e035f1f823ec2e2ff2ec2d88751bc0 Mon Sep 17 00:00:00 2001
From: Sergey Torokhov <torokhov-s-a@yandex.ru>
Date: Tue, 23 Mar 2021 00:11:43 +0300
Subject: sci-libs/cantera: 2.5.1, add USE=lapack

Add USE=lapack to use Lapack insatead of Eigen for linear algebra support
in some cases. Eigen is still required if Lapack support is enabled.
The sci-libs/sundials[lapack] is required to build with Lapack support.

Signed-off-by: Sergey Torokhov <torokhov-s-a@yandex.ru>
Closes: https://github.com/gentoo/gentoo/pull/20071
Signed-off-by: Joonas Niilola <juippis@gentoo.org>
---
 sci-libs/cantera/cantera-2.5.1-r1.ebuild | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'sci-libs/cantera')

diff --git a/sci-libs/cantera/cantera-2.5.1-r1.ebuild b/sci-libs/cantera/cantera-2.5.1-r1.ebuild
index 4cf4cc6c3c3a..2bf3e5d6a748 100644
--- a/sci-libs/cantera/cantera-2.5.1-r1.ebuild
+++ b/sci-libs/cantera/cantera-2.5.1-r1.ebuild
@@ -17,7 +17,7 @@ SRC_URI="https://github.com/Cantera/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 LICENSE="BSD"
 SLOT="0"
 KEYWORDS="~amd64 ~x86"
-IUSE="+cti fortran pch +python test"
+IUSE="+cti fortran lapack pch +python test"
 RESTRICT="!test? ( test )"
 
 REQUIRED_USE="
@@ -27,6 +27,7 @@ REQUIRED_USE="
 
 RDEPEND="
 	${PYTHON_DEPS}
+	lapack? ( virtual/lapack )
 	python? (
 		$(python_gen_cond_dep '
 			dev-python/numpy[${PYTHON_MULTI_USEDEP}]
@@ -34,7 +35,7 @@ RDEPEND="
 		')
 	)
 	dev-cpp/yaml-cpp
-	<sci-libs/sundials-5.3.0:0=
+	<sci-libs/sundials-5.3.0:0=[lapack?]
 "
 
 DEPEND="
@@ -88,6 +89,7 @@ src_configure() {
 		env_vars="all"
 		extra_inc_dirs="/usr/include/eigen3"
 	)
+	use lapack && scons_vars+=( blas_lapack_libs="lapack,blas" )
 	use test || scons_vars+=( googletest="none" )
 
 	scons_targets=(
-- 
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