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# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/cuda.eclass,v 1.2 2013/06/22 12:37:28 jlec Exp $
inherit 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
# @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() {
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) ${args} are supported"
return 1
fi
}
# @FUNCTION: cuda_sanitize
# @DESCRIPTION:
# Correct NVCCFLAGS by adding the necessary reference to gcc bindir and
# passing CXXFLAGS to underlying compiler without disturbing nvcc.
cuda_sanitize() {
# Be verbose if wanted
[[ "${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}\""
debug-print "Using ${NVCCFLAGS} for cuda"
export NVCCFLAGS
}
# @FUNCTION: cuda_pkg_setup
# @DESCRIPTION:
# Call cuda_src_prepare for EAPIs not supporting src_prepare
cuda_pkg_setup() {
cuda_src_prepare
}
# @FUNCTION: cuda_src_prepare
# @DESCRIPTION:
# Sanitise and export NVCCFLAGS by default
cuda_src_prepare() {
cuda_sanitize
}
case "${EAPI:-0}" in
0|1)
EXPORT_FUNCTIONS pkg_setup ;;
2|3|4|5)
EXPORT_FUNCTIONS src_prepare ;;
*) die "EAPI=${EAPI} is not supported" ;;
esac
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