summaryrefslogtreecommitdiff
path: root/eclass/llvm-utils.eclass
blob: 1ae3295484c82056b365a375038f24bb3a2ee5bf (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
146
147
148
149
150
151
152
153
# Copyright 2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: llvm-utils.eclass
# @MAINTAINER:
# Michał Górny <mgorny@gentoo.org>
# @AUTHOR:
# Michał Górny <mgorny@gentoo.org>
# @SUPPORTED_EAPIS: 7 8
# @BLURB: Common utility functions for building against installed LLVM
# @DESCRIPTION:
# The utility eclass providing shared functions reused between
# llvm.eclass and llvm-r1.eclass.  It may also be used directly
# in ebuilds.

case ${EAPI} in
	7|8) ;;
	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac

if [[ -z ${_LLVM_UTILS_ECLASS} ]]; then
_LLVM_UTILS_ECLASS=1

# @FUNCTION: llvm_tuple_to_target
# @USAGE: [<tuple>]
# @DESCRIPTION:
# Translate a tuple into a target suitable for LLVM_TARGETS.
# Defaults to ${CHOST} if not specified.
llvm_tuple_to_target() {
	debug-print-function ${FUNCNAME} "$@"

	[[ ${#} -gt 1 ]] && die "Usage: ${FUNCNAME} [<tuple>]"

	case ${1:-${CHOST}} in
		aarch64*) echo "AArch64";;
		amdgcn*) echo "AMDGPU";;
		arc*) echo "ARC";;
		arm*) echo "ARM";;
		avr*) echo "AVR";;
		bpf*) echo "BPF";;
		csky*) echo "CSKY";;
		loong*) echo "LoongArch";;
		m68k*) echo "M68k";;
		mips*) echo "Mips";;
		msp430*) echo "MSP430";;
		nvptx*) echo "NVPTX";;
		powerpc*) echo "PowerPC";;
		riscv*) echo "RISCV";;
		sparc*) echo "Sparc";;
		s390*) echo "SystemZ";;
		x86_64*|i?86*) echo "X86";;
		xtensa*) echo "Xtensa";;
		*) die "Unknown LLVM target for tuple ${1:-${CHOST}}"
	esac
}

# @FUNCTION: llvm_fix_clang_version
# @USAGE: <variable-name>...
# @DESCRIPTION:
# Fix the clang compiler name in specified variables to include
# the major version, to prevent PATH alterations from forcing an older
# clang version being used.
llvm_fix_clang_version() {
	debug-print-function ${FUNCNAME} "$@"

	local shopt_save=$(shopt -p -o noglob)
	set -f
	local var
	for var; do
		local split=( ${!var} )
		case ${split[0]} in
			*clang|*clang++|*clang-cpp)
				local version=()
				read -r -a version < <("${split[0]}" --version)
				local major=${version[-1]%%.*}
				if [[ -n ${major//[0-9]} ]]; then
					die "${var}=${!var} produced invalid --version: ${version[*]}"
				fi

				split[0]+=-${major}
				if ! type -P "${split[0]}" &>/dev/null; then
					die "${split[0]} does not seem to exist"
				fi
				declare -g "${var}=${split[*]}"
				;;
		esac
	done
	${shopt_save}
}

# @FUNCTION: llvm_fix_tool_path
# @USAGE: <variable-name>...
# @DESCRIPTION:
# Fix the LLVM tools referenced in the specified variables to their
# current location, to prevent PATH alterations from forcing older
# versions being used.
llvm_fix_tool_path() {
	debug-print-function ${FUNCNAME} "$@"

	local shopt_save=$(shopt -p -o noglob)
	set -f
	local var
	for var; do
		local split=( ${!var} )
		local path=$(type -P ${split[0]} 2>/dev/null)
		# if it resides in one of the LLVM prefixes, it's an LLVM tool!
		if [[ ${path} == "${BROOT}/usr/lib/llvm"* ]]; then
			split[0]=${path}
			declare -g "${var}=${split[*]}"
		fi
	done
	${shopt_save}
}

# @FUNCTION: llvm_prepend_path
# @USAGE: <slot>
# @DESCRIPTION:
# Prepend the path to the specified LLVM slot to PATH variable,
# and reexport it.
llvm_prepend_path() {
	debug-print-function ${FUNCNAME} "$@"

	[[ ${#} -ne 1 ]] && die "Usage: ${FUNCNAME} <slot>"
	local slot=${1}

	local llvm_path=${ESYSROOT}/usr/lib/llvm/${slot}/bin
	local IFS=:
	local split_path=( ${PATH} )
	local new_path=()
	local x added=

	for x in "${split_path[@]}"; do
		if [[ ${x} == */usr/lib/llvm/*/bin ]]; then
			# prepend new path in front of the first LLVM version found
			if [[ ! ${added} ]]; then
				new_path+=( "${llvm_path}" )
				added=1
			fi
			# remove duplicate copies of the same path
			if [[ ${x} == ${llvm_path} ]]; then
				# deduplicate
				continue
			fi
		fi
		new_path+=( "${x}" )
	done
	# ...or to the end of PATH
	[[ ${added} ]] || new_path+=( "${llvm_path}" )

	export PATH=${new_path[*]}
}

fi