SUMMARY="A C++ template library for linear algebra, vectors and more"
DESCRIPTION="Eigen is a versatile, fast, elegant and reliable template library \
that supports all matrix sizes, from small fixed-size matrices to arbitrarily \
large dense matrices, and even sparse matrices.
- It supports all standard numeric types, including std::complex, integers, \
and is easily extensible to custom numeric types.
- It supports various matrix decompositions and geometry features.
- Its ecosystem of unsupported modules provides many specialized features \
such as non-linear optimization, matrix functions, a polynomial solver, FFT, \
and much more.
- Expression templates allow to intelligently remove temporaries and enable \
lazy evaluation, when that is appropriate.
- Explicit vectorization is performed for SSE 2/3/4, AVX, FMA, AVX512, \
ARM NEON (32-bit and 64-bit), PowerPC instruction sets, and now S390x SIMD \
(ZVector) with graceful fallback to non-vectorized code.
- Fixed-size matrices are fully optimized: dynamic memory allocation is \
avoided, and the loops are unrolled when that makes sense.
- For large matrices, special attention is paid to cache-friendliness.
- Algorithms are carefully selected for reliability. Reliability trade-offs \
are clearly documented and extremely safe decompositions are available.
- Eigen is thoroughly tested through its own test suite (over 500 executables) \
the standard BLAS test suite, and parts of the LAPACK test suite.
- The API is extremely clean and expressive while feeling natural to C++ \
programmers, thanks to expression templates.
- Implementing an algorithm on top of Eigen feels like just copying pseudocode."
HOMEPAGE="http://eigen.tuxfamily.org"
COPYRIGHT="2006-2011 Benoit Jacob
	2008-2012 Gael Guennebaud, et al."
LICENSE="MPL v2
	Apache v2
	BSD (3-clause)
	GNU GPL v3
	GNU LGPL v2.1"
REVISION="3"
SOURCE_URI="http://gitlab.com/libeigen/eigen/-/archive/$portVersion/eigen-$portVersion.tar.gz"
CHECKSUM_SHA256="e9c326dc8c05cd1e044c71f30f1b2e34a6161a3b6ecf445d56b53ff1669e3dec"
PATCHES="eigen-$portVersion.patchset"

ARCHITECTURES="all !x86_gcc2"
SECONDARY_ARCHITECTURES="x86"

PROVIDES="
	eigen$secondaryArchSuffix = $portVersion
	devel:eigen$secondaryArchSuffix = $portVersion
	"
REQUIRES="
	haiku$secondaryArchSuffix
	lib:libgfortran$secondaryArchSuffix
	lib:libquadmath$secondaryArchSuffix
	"
CONFLICTS="
	eigen3$secondaryArchSuffix
	"

BUILD_REQUIRES="
	haiku${secondaryArchSuffix}_devel
	devel:libboost_system$secondaryArchSuffix >= 1.88.0
	devel:libcholmod$secondaryArchSuffix
	devel:libfftw3f$secondaryArchSuffix
	devel:libGL$secondaryArchSuffix
	devel:libgmp$secondaryArchSuffix
	devel:libhwloc$secondaryArchSuffix >= 15.7	# we want hwloc2_devel
	devel:libklu$secondaryArchSuffix
	devel:libmpfr$secondaryArchSuffix
#	devel:libopenblas$secondaryArchSuffix
	devel:libumfpack$secondaryArchSuffix
	devel:libsuperlu$secondaryArchSuffix
	devel:libspqr$secondaryArchSuffix
#	devel:libtbb$secondaryArchSuffix
	"
BUILD_PREREQUIRES="
	cmd:cmake
	cmd:gcc$secondaryArchSuffix
	cmd:gfortran$secondaryArchSuffix
	cmd:make
	cmd:pkg_config$secondaryArchSuffix
	"

BUILD()
{
	cmake -Bbuild -S. -DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_INSTALL_PREFIX=$prefix \
		-DINCLUDE_INSTALL_DIR=$includeDir \
		-DCMAKEPACKAGE_INSTALL_DIR=$libDir/cmake/eigen3 \
		-DPKGCONFIG_INSTALL_DIR=$developLibDir/pkgconfig \
		-DEIGEN_BUILD_BLAS=OFF \
		-DEIGEN_BUILD_LAPACK=OFF \
		-Wno-dev

	make -C build $jobArgs
}

INSTALL()
{
	make -C build install
}

TEST()
{
	# test binaries are not build with ctest
	make -C build check -j 4
	# 99% tests passed, 5 tests failed out of 1283 (5 crashes)
	# Label Time Summary:
	# Official       = 355.40 sec*proc (910 tests)
	# Unsupported    =  74.87 sec*proc (231 tests)
	# smoketest      =   9.50 sec*proc (109 tests)
	# Total Test time (real) = 2542.71 sec
	# The following tests FAILED:
    #      13 - klu_support_1 (Timeout)
    #      14 - klu_support_2 (Signal 21)
    #      80 - packetmath_11 (Signal 21)                         Official
    #     732 - geo_homogeneous_2 (Signal 21)                     Official
    #     733 - geo_homogeneous_3 (Signal 21)                     Official

	# change -E to -R to run only the crashing tests
#	ctest --test-dir build --output-on-failure -E "klu_support_1|klu_support_2|packetmath_11|geo_homogeneous_2|geo_homogeneous_3"
}