--- /dev/null
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+CMAKE_MAKEFILE_GENERATOR="ninja"
+
+inherit bash-completion-r1 cmake-utils cuda eutils multilib readme.gentoo-r1 toolchain-funcs xdg-utils
+
+if [[ $PV = *9999* ]]; then
+ EGIT_REPO_URI="git://git.gromacs.org/gromacs.git
+ https://gerrit.gromacs.org/gromacs.git
+ https://github.com/gromacs/gromacs.git
+ http://repo.or.cz/r/gromacs.git"
+ [[ $PV = 9999 ]] && EGIT_BRANCH="master" || EGIT_BRANCH="release-${PV:0:4}"
+ inherit git-r3
+else
+ SRC_URI="ftp://ftp.gromacs.org/pub/${PN}/${PN}-${PV/_/-}.tar.gz
+ test? ( http://gerrit.gromacs.org/download/regressiontests-${PV/_/-}.tar.gz )"
+ KEYWORDS="~amd64 ~arm ~x86 ~amd64-linux ~x86-linux ~x64-macos ~x86-macos"
+fi
+
+ACCE_IUSE="cpu_flags_x86_sse2 cpu_flags_x86_sse4_1 cpu_flags_x86_fma4 cpu_flags_x86_avx cpu_flags_x86_avx2"
+
+DESCRIPTION="The ultimate molecular dynamics simulation package"
+HOMEPAGE="http://www.gromacs.org/"
+
+# see COPYING for details
+# http://repo.or.cz/w/gromacs.git/blob/HEAD:/COPYING
+# base, vmd plugins, fftpack from numpy, blas/lapck from netlib, memtestG80 library, mpi_thread lib
+LICENSE="LGPL-2.1 UoI-NCSA !mkl? ( !fftw? ( BSD ) !blas? ( BSD ) !lapack? ( BSD ) ) cuda? ( LGPL-3 ) threads? ( BSD )"
+SLOT="0/${PV}"
+IUSE="X blas cuda +doc -double-precision +fftw +hwloc lapack mkl mpi +offensive opencl openmp +single-precision test +threads +tng ${ACCE_IUSE}"
+
+CDEPEND="
+ X? (
+ x11-libs/libX11
+ x11-libs/libSM
+ x11-libs/libICE
+ )
+ blas? ( virtual/blas )
+ cuda? ( >=dev-util/nvidia-cuda-toolkit-4.2.9-r1 )
+ opencl? ( virtual/opencl )
+ fftw? ( sci-libs/fftw:3.0 )
+ hwloc? ( <sys-apps/hwloc-2 )
+ lapack? ( virtual/lapack )
+ mkl? ( sci-libs/mkl )
+ mpi? ( virtual/mpi )
+ "
+DEPEND="${CDEPEND}
+ virtual/pkgconfig
+ doc? (
+ app-doc/doxygen
+ dev-texlive/texlive-latex
+ dev-texlive/texlive-latexextra
+ media-gfx/imagemagick
+ )"
+RDEPEND="${CDEPEND}"
+
+REQUIRED_USE="
+ || ( single-precision double-precision )
+ cuda? ( single-precision )
+ cuda? ( !opencl )
+ mkl? ( !blas !fftw !lapack )"
+
+DOCS=( AUTHORS README )
+
+if [[ ${PV} != *9999 ]]; then
+ S="${WORKDIR}/${PN}-${PV/_/-}"
+fi
+
+pkg_pretend() {
+ [[ $(gcc-version) == "4.1" ]] && die "gcc 4.1 is not supported by gromacs"
+ use openmp && ! tc-has-openmp && \
+ die "Please switch to an openmp compatible compiler"
+}
+
+src_unpack() {
+ if [[ ${PV} != *9999 ]]; then
+ default
+ else
+ git-r3_src_unpack
+ if use test; then
+ EGIT_REPO_URI="git://git.gromacs.org/regressiontests.git" \
+ EGIT_BRANCH="${EGIT_BRANCH}" \
+ EGIT_CHECKOUT_DIR="${WORKDIR}/regressiontests"\
+ git-r3_src_unpack
+ fi
+ fi
+}
+
+src_prepare() {
+ #notes/todos
+ # -on apple: there is framework support
+
+ xdg_environment_reset #591952
+
+ cmake-utils_src_prepare
+
+ use cuda && cuda_src_prepare
+
+ GMX_DIRS=""
+ use single-precision && GMX_DIRS+=" float"
+ use double-precision && GMX_DIRS+=" double"
+
+ if use test; then
+ for x in ${GMX_DIRS}; do
+ mkdir -p "${WORKDIR}/${P}_${x}" || die
+ cp -al "${WORKDIR}/regressiontests"* "${WORKDIR}/${P}_${x}/tests" || die
+ done
+ fi
+
+ DOC_CONTENTS="Gromacs can use sci-chemistry/vmd to read additional file formats"
+}
+
+src_configure() {
+ local mycmakeargs_pre=( ) extra fft_opts=( )
+
+ #go from slowest to fastest acceleration
+ local acce="None"
+ use cpu_flags_x86_sse2 && acce="SSE2"
+ use cpu_flags_x86_sse4_1 && acce="SSE4.1"
+ use cpu_flags_x86_fma4 && acce="AVX_128_FMA"
+ use cpu_flags_x86_avx && acce="AVX_256"
+ use cpu_flags_x86_avx2 && acce="AVX2_256"
+
+ #to create man pages, build tree binaries are executed (bug #398437)
+ [[ ${CHOST} = *-darwin* ]] && \
+ extra+=" -DCMAKE_BUILD_WITH_INSTALL_RPATH=OFF"
+
+ if use fftw; then
+ fft_opts=( -DGMX_FFT_LIBRARY=fftw3 )
+ elif use mkl && has_version "=sci-libs/mkl-10*"; then
+ fft_opts=( -DGMX_FFT_LIBRARY=mkl
+ -DMKL_INCLUDE_DIR="${MKLROOT}/include"
+ -DMKL_LIBRARIES="$(echo /opt/intel/mkl/10.0.5.025/lib/*/libmkl.so);$(echo /opt/intel/mkl/10.0.5.025/lib/*/libiomp*.so)"
+ )
+ elif use mkl; then
+ local bits=$(get_libdir)
+ fft_opts=( -DGMX_FFT_LIBRARY=mkl
+ -DMKL_INCLUDE_DIR="$(echo /opt/intel/*/mkl/include)"
+ -DMKL_LIBRARIES="$(echo /opt/intel/*/mkl/lib/*${bits/lib}/libmkl_rt.so)"
+ )
+ else
+ fft_opts=( -DGMX_FFT_LIBRARY=fftpack )
+ fi
+
+ mycmakeargs_pre+=(
+ "${fft_opts[@]}"
+ -DGMX_X11=$(usex X)
+ -DGMX_EXTERNAL_BLAS=$(usex blas)
+ -DGMX_EXTERNAL_LAPACK=$(usex lapack)
+ -DGMX_OPENMP=$(usex openmp)
+ -DGMX_COOL_QUOTES=$(usex offensive)
+ -DGMX_USE_TNG=$(usex tng)
+ -DGMX_BUILD_MANUAL=$(usex doc)
+ -DGMX_HWLOC=$(usex hwloc)
+ -DGMX_DEFAULT_SUFFIX=off
+ -DGMX_SIMD="$acce"
+ -DGMX_VMD_PLUGIN_PATH="${EPREFIX}/usr/$(get_libdir)/vmd/plugins/*/molfile/"
+ -DBUILD_TESTING=$(usex test)
+ -DGMX_BUILD_UNITTESTS=$(usex test)
+ ${extra}
+ )
+
+ for x in ${GMX_DIRS}; do
+ einfo "Configuring for ${x} precision"
+ local suffix=""
+ #if we build single and double - double is suffixed
+ use double-precision && use single-precision && \
+ [[ ${x} = "double" ]] && suffix="_d"
+ local p
+ [[ ${x} = "double" ]] && p="-DGMX_DOUBLE=ON" || p="-DGMX_DOUBLE=OFF"
+ local cuda=( "-DGMX_GPU=OFF" )
+ [[ ${x} = "float" ]] && use cuda && \
+ cuda=( "-DGMX_GPU=ON" )
+ local opencl=( "-DGMX_USE_OPENCL=OFF" )
+ use opencl && opencl=( "-DGMX_USE_OPENCL=ON" ) cuda=( "-DGMX_GPU=ON" )
+ mycmakeargs=(
+ ${mycmakeargs_pre[@]} ${p}
+ -DGMX_MPI=OFF
+ -DGMX_THREAD_MPI=$(usex threads)
+ "${opencl[@]}"
+ "${cuda[@]}"
+ "$(use test && echo -DREGRESSIONTEST_PATH="${WORKDIR}/${P}_${x}/tests")"
+ -DGMX_BINARY_SUFFIX="${suffix}"
+ -DGMX_LIBS_SUFFIX="${suffix}"
+ )
+ BUILD_DIR="${WORKDIR}/${P}_${x}" cmake-utils_src_configure
+ [[ ${CHOST} != *-darwin* ]] || \
+ sed -i '/SET(CMAKE_INSTALL_NAME_DIR/s/^/#/' "${WORKDIR}/${P}_${x}/gentoo_rules.cmake" || die
+ use mpi || continue
+ einfo "Configuring for ${x} precision with mpi"
+ mycmakeargs=(
+ ${mycmakeargs_pre[@]} ${p}
+ -DGMX_THREAD_MPI=OFF
+ -DGMX_MPI=ON ${cuda}
+ -DGMX_OPENMM=OFF
+ -DGMX_BUILD_MDRUN_ONLY=ON
+ -DBUILD_SHARED_LIBS=OFF
+ -DGMX_BUILD_MANUAL=OFF
+ -DGMX_BINARY_SUFFIX="_mpi${suffix}"
+ -DGMX_LIBS_SUFFIX="_mpi${suffix}"
+ )
+ BUILD_DIR="${WORKDIR}/${P}_${x}_mpi" CC="mpicc" cmake-utils_src_configure
+ [[ ${CHOST} != *-darwin* ]] || \
+ sed -i '/SET(CMAKE_INSTALL_NAME_DIR/s/^/#/' "${WORKDIR}/${P}_${x}_mpi/gentoo_rules.cmake" || die
+ done
+}
+
+src_compile() {
+ for x in ${GMX_DIRS}; do
+ einfo "Compiling for ${x} precision"
+ BUILD_DIR="${WORKDIR}/${P}_${x}"\
+ cmake-utils_src_compile
+ # not 100% necessary for rel ebuilds as available from website
+ if use doc; then
+ BUILD_DIR="${WORKDIR}/${P}_${x}"\
+ cmake-utils_src_compile manual
+ fi
+ use mpi || continue
+ einfo "Compiling for ${x} precision with mpi"
+ BUILD_DIR="${WORKDIR}/${P}_${x}_mpi"\
+ cmake-utils_src_compile
+ done
+}
+
+src_test() {
+ for x in ${GMX_DIRS}; do
+ BUILD_DIR="${WORKDIR}/${P}_${x}"\
+ cmake-utils_src_make check
+ done
+}
+
+src_install() {
+ for x in ${GMX_DIRS}; do
+ BUILD_DIR="${WORKDIR}/${P}_${x}" \
+ cmake-utils_src_install
+ if use doc; then
+ newdoc "${WORKDIR}/${P}_${x}"/docs/manual/gromacs.pdf "${PN}-manual-${PV}.pdf"
+ fi
+ use mpi || continue
+ BUILD_DIR="${WORKDIR}/${P}_${x}_mpi" \
+ cmake-utils_src_install
+ done
+
+ if use tng; then
+ insinto /usr/include/tng
+ doins src/external/tng_io/include/tng/*h
+ fi
+ # drop unneeded stuff
+ rm "${ED}"usr/bin/GMXRC* || die
+ for x in "${ED}"usr/bin/gmx-completion-*.bash ; do
+ local n=${x##*/gmx-completion-}
+ n="${n%.bash}"
+ cat "${ED}"usr/bin/gmx-completion.bash "$x" > "${T}/${n}" || die
+ newbashcomp "${T}"/"${n}" "${n}"
+ done
+ rm "${ED}"usr/bin/gmx-completion*.bash || die
+ readme.gentoo_create_doc
+}
+
+pkg_postinst() {
+ einfo
+ einfo "Please read and cite:"
+ einfo "Gromacs 4, J. Chem. Theory Comput. 4, 435 (2008). "
+ einfo "https://dx.doi.org/10.1021/ct700301q"
+ einfo
+ readme.gentoo_print_elog
+}
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