summaryrefslogtreecommitdiff
blob: 9ae7a28e1d2b40c3d3ca00d42d7888125279dd39 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

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-is-gcc ; 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