ensmallen, new recipe (dependency for mlpack) (#13013)

sci-libs/ensmallen/ensmallen-3.10.0.recipe

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+SUMMARY="Flexible C++ library for efficient numerical optimization"
+DESCRIPTION="* ensmallen is a high-quality C++ library for non-linear numerical optimization
+* provides many types of optimizers that can be used for virtually any numerical optimization task
+* examples of included optimizers: L-BFGS, SGD, CMAES and Simulated Annealing
+* allows optional callbacks to customize the optimization process"
+HOMEPAGE="https://ensmallen.org/"
+COPYRIGHT="2008-2023, Ryan Curtin
+	2008-2012, Dongryeol Lee
+	2010-2012, James Cline
+	2013-2023, Marcus Edel
+	2013-2018, Sumedh Ghaisas
+	2013, Mudit Raj Gupta
+	2014, Ryan Birmingham
+	2014, Siddharth Agrawal
+	2014-2015, Stephen Tu
+	2015&2017, Shangtong Zhang
+	2016, Shikhar Bhardwaj
+	2016, Mike Izbicki
+	2016, Ranjan Mondal
+	2017, Vivek Pal
+	2017-2018, Sourabh Varshney
+	2017, Chenzhe Diao
+	2017, Abhinav Moudgil
+	2017, Konstantin Sidorov
+	2017, Kirill Mishchenko
+	2017&2019, N Rajiv Vaidyanathan
+	2017, Kartik Nighania
+	2017-2018, Manish Kumar
+	2017-2018, Haritha Sreedharan Nair
+	2018, B Kartheek Reddy
+	2018, Moksh Jain
+	2018, Shikhar Jaiswa
+	2018-2023, Conrad Sanderson
+	2018, Dan Timson
+	2019, Rahul Ganesh Prabhu
+	2019, Roberto Hueso
+	2019, Sayan Goswami
+	2020, Joe Dinius"
+LICENSE="BSD (3-clause)"
+REVISION="1"
+SOURCE_URI="https://ensmallen.org/files/ensmallen-$portVersion.tar.gz"
+CHECKSUM_SHA256="248e2036856f7aa8fab34ca02fa3a79b2c9af20f53b1d26e3de939d150dcbb3a"
+PATCHES="ensmallen-$portVersion.patchset"
+
+ARCHITECTURES="all !x86_gcc2"
+SECONDARY_ARCHITECTURES="?x86"
+
+PROVIDES="
+	ensmallen$secondaryArchSuffix = $portVersion
+	devel:ensmallen$secondaryArchSuffix = $portVersion
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	"
+
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	devel:libarmadillo$secondaryArchSuffix
+	"
+BUILD_PREREQUIRES="
+	cmd:cmake
+	cmd:gcc$secondaryArchSuffix
+	cmd:make
+	"
+
+BUILD()
+{
+	cmake -B build -S . -DCMAKE_BUILD_TYPE=Release \
+		$cmakeDirArgs
+
+	make -C build $jobArgs
+}
+
+INSTALL()
+{
+	make -C build install
+}
+
+TEST()
+{
+	make -C build test
+}