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# 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 [[ ! ${_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
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