# Copyright 1999-2016 Gentoo Foundation # Distributed under the terms of the GNU General Public License v2 # $Id$ inherit flag-o-matic toolchain-funcs versionator # @ECLASS: cuda.eclass # @MAINTAINER: # Justin Lecher <jlec@gentoo.org> # @BLURB: Common functions for cuda packages # @DESCRIPTION: # This eclass contains functions to be used with cuda package. Currently it is # setting and/or sanitizing NVCCFLAGS, the compiler flags for nvcc. This is # automatically done and exported in src_prepare() or manually by calling # cuda_sanatize. # @EXAMPLE: # inherit cuda if [[ -z ${_CUDA_ECLASS} ]]; then # @ECLASS-VARIABLE: NVCCFLAGS # @DESCRIPTION: # nvcc compiler flags (see nvcc --help), which should be used like # CFLAGS for c compiler : ${NVCCFLAGS:=-O2} # @ECLASS-VARIABLE: CUDA_VERBOSE # @DESCRIPTION: # Being verbose during compilation to see underlying commands : ${CUDA_VERBOSE:=true} # @FUNCTION: cuda_gccdir # @USAGE: [-f] # @RETURN: gcc bindir compatible with current cuda, optionally (-f) prefixed with "--compiler-bindir=" # @DESCRIPTION: # Helper for determination of the latest gcc bindir supported by # then current nvidia cuda toolkit. # # Example: # @CODE # cuda_gccdir -f # -> --compiler-bindir="/usr/x86_64-pc-linux-gnu/gcc-bin/4.6.3" # @CODE cuda_gccdir() { debug-print-function ${FUNCNAME} "$@" local gcc_bindir ver args="" flag ret # Currently we only support the gnu compiler suite if [[ $(tc-getCXX) != *g++* ]]; then ewarn "Currently we only support the gnu compiler suite" return 2 fi while [ "$1" ]; do case $1 in -f) flag="--compiler-bindir=" ;; *) ;; esac shift done if ! args=$(cuda-config -s); then eerror "Could not execute cuda-config" eerror "Make sure >=dev-util/nvidia-cuda-toolkit-4.2.9-r1 is installed" die "cuda-config not found" else args=$(version_sort ${args}) if [[ -z ${args} ]]; then die "Could not determine supported gcc versions from cuda-config" fi fi for ver in ${args}; do has_version "=sys-devel/gcc-${ver}*" && \ gcc_bindir="$(ls -d ${EPREFIX}/usr/*pc-linux-gnu/gcc-bin/${ver}* | tail -n 1)" done if [[ -n ${gcc_bindir} ]]; then if [[ -n ${flag} ]]; then ret="${flag}\"${gcc_bindir}\"" else ret="${gcc_bindir}" fi echo ${ret} return 0 else eerror "Only gcc version(s) ${args} are supported," eerror "of which none is installed" die "Only gcc version(s) ${args} are supported" return 1 fi } # @FUNCTION: cuda_sanitize # @DESCRIPTION: # Correct NVCCFLAGS by adding the necessary reference to gcc bindir and # passing CXXFLAGS to underlying compiler without disturbing nvcc. cuda_sanitize() { debug-print-function ${FUNCNAME} "$@" local rawldflags=$(raw-ldflags) # Be verbose if wanted [[ "${CUDA_VERBOSE}" == true ]] && NVCCFLAGS+=" -v" # Tell nvcc where to find a compatible compiler NVCCFLAGS+=" $(cuda_gccdir -f)" # Tell nvcc which flags should be used for underlying C compiler NVCCFLAGS+=" --compiler-options=\"${CXXFLAGS}\" --linker-options=\"${rawldflags// /,}\"" debug-print "Using ${NVCCFLAGS} for cuda" export NVCCFLAGS } # @FUNCTION: cuda_pkg_setup # @DESCRIPTION: # Call cuda_src_prepare for EAPIs not supporting src_prepare cuda_pkg_setup() { debug-print-function ${FUNCNAME} "$@" cuda_src_prepare } # @FUNCTION: cuda_src_prepare # @DESCRIPTION: # Sanitise and export NVCCFLAGS by default cuda_src_prepare() { debug-print-function ${FUNCNAME} "$@" cuda_sanitize } case "${EAPI:-0}" in 0|1) EXPORT_FUNCTIONS pkg_setup ;; 2|3|4|5|6) EXPORT_FUNCTIONS src_prepare ;; *) die "EAPI=${EAPI} is not supported" ;; esac _CUDA_ECLASS=1 fi