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# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=7
inherit cmake cuda flag-o-matic toolchain-funcs
DESCRIPTION="Fast approximate nearest neighbor searches in high dimensional spaces"
HOMEPAGE="https://github.com/mariusmuja/flann"
SRC_URI="https://github.com/mariusmuja/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
LICENSE="BSD"
SLOT="0"
KEYWORDS="amd64 ~arm arm64 ~ppc x86 ~amd64-linux ~x86-linux"
IUSE="cuda doc examples mpi octave openmp"
BDEPEND="
app-arch/unzip
doc? ( dev-tex/latex2html )
"
DEPEND="
app-arch/lz4:=
cuda? ( >=dev-util/nvidia-cuda-toolkit-5.5 )
mpi? (
dev-libs/boost:=[mpi]
sci-libs/hdf5[mpi]
)
!mpi? ( !sci-libs/hdf5[mpi] )
octave? ( >=sci-mathematics/octave-3.6.4-r1 )
"
RDEPEND="${DEPEND}"
# TODO:
# readd dependencies for test suite,
# requires multiple ruby dependencies
PATCHES=(
"${FILESDIR}"/${P}-cmake-3.11{,-1}.patch # bug 678030
"${FILESDIR}"/${P}-cuda-9.patch
"${FILESDIR}"/${P}-system-lz4.patch # bug 681898
"${FILESDIR}"/flann-1.9.1-system-lz4-pkgconfig.patch
)
pkg_pretend() {
[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
}
pkg_setup() {
[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
}
src_prepare() {
# bug #302621
use mpi && export CXX=mpicxx
# produce pure octave files
# octave gentoo installation for .m files respected
sed -i \
-e 's/--mex//' \
-e 's/\.mex/\.oct/' \
-e '/FILES/s/${MEX_FILE}//' \
-e 's:share/flann/octave:share/octave/site/m:' \
-e "/CUSTOM_TARGET/a\INSTALL(FILES \${MEX_FILE} DESTINATION libexec/octave/site/oct/${CHOST})" \
src/matlab/CMakeLists.txt || die
use cuda && cuda_src_prepare
cmake_src_prepare
}
src_configure() {
append-cxxflags -std=c++11
# python bindings are split off into dev-python/pyflann
local mycmakeargs=(
-DBUILD_C_BINDINGS=ON
-DBUILD_PYTHON_BINDINGS=OFF
-DPYTHON_EXECUTABLE=
-DBUILD_CUDA_LIB=$(usex cuda)
-DBUILD_EXAMPLES=$(usex examples)
-DBUILD_DOC=$(usex doc)
-DBUILD_TESTS=OFF
-DBUILD_MATLAB_BINDINGS=$(usex octave)
-DUSE_MPI=$(usex mpi)
-DUSE_OPENMP=$(usex openmp)
)
use cuda && mycmakeargs+=(
-DCUDA_NVCC_FLAGS="${NVCCFLAGS} --linker-options \"-arsch\""
)
use doc && mycmakeargs+=( -DDOCDIR=share/doc/${PF} )
cmake_src_configure
}
src_install() {
cmake_src_install
find "${D}" -name 'lib*.a' -delete || die
}
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