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# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
EAPI=6
inherit cmake-utils cuda flag-o-matic toolchain-funcs
DESCRIPTION="Fast approximate nearest neighbor searches in high dimensional spaces"
HOMEPAGE="http://www.cs.ubc.ca/research/flann/"
SRC_URI="https://github.com/mariusmuja/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
LICENSE="BSD"
SLOT="0"
KEYWORDS="amd64 ~arm ~ppc ~x86 ~amd64-linux ~x86-linux"
IUSE="cuda doc examples mpi openmp octave static-libs"
RDEPEND="
cuda? ( >=dev-util/nvidia-cuda-toolkit-5.5 )
mpi? (
sci-libs/hdf5[mpi]
dev-libs/boost:=[mpi]
)
!mpi? ( !sci-libs/hdf5[mpi] )
octave? ( >=sci-mathematics/octave-3.6.4-r1 )"
DEPEND="${RDEPEND}
app-arch/unzip
doc? ( dev-tex/latex2html )"
# TODO:
# readd dependencies for test suite,
# requires multiple ruby dependencies
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/${CHOST})" \
src/matlab/CMakeLists.txt || die
use cuda && cuda_src_prepare
cmake-utils_src_prepare
}
src_configure() {
append-cxxflags -std=c++11
# python bindings are split
# off into dev-python/pyflann
local mycmakeargs=(
-DBUILD_C_BINDINGS=ON
-DBUILD_PYTHON_BINDINGS=OFF
-DPYTHON_EXECUTABLE=
-DDOCDIR=share/doc/${PF}
-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="${NVCCFLAGS} --linker-options \"-arsch\""
)
cmake-utils_src_configure
}
src_install() {
cmake-utils_src_install
if ! use static-libs; then
find "${D}" -name 'lib*.a' -delete || die
fi
}
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