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154 lines
3.8 KiB
154 lines
3.8 KiB
# Copyright 2024 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: llvm-utils.eclass
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# @MAINTAINER:
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# Michał Górny <mgorny@gentoo.org>
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# @AUTHOR:
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# Michał Górny <mgorny@gentoo.org>
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# @SUPPORTED_EAPIS: 7 8
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# @BLURB: Common utility functions for building against installed LLVM
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# @DESCRIPTION:
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# The utility eclass providing shared functions reused between
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# llvm.eclass and llvm-r1.eclass. It may also be used directly
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# in ebuilds.
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case ${EAPI} in
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7|8) ;;
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*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
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esac
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if [[ ! ${_LLVM_UTILS_ECLASS} ]]; then
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_LLVM_UTILS_ECLASS=1
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# @FUNCTION: llvm_tuple_to_target
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# @USAGE: [<tuple>]
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# @DESCRIPTION:
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# Translate a tuple into a target suitable for LLVM_TARGETS.
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# Defaults to ${CHOST} if not specified.
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llvm_tuple_to_target() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -gt 1 ]] && die "Usage: ${FUNCNAME} [<tuple>]"
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case ${1:-${CHOST}} in
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aarch64*) echo "AArch64";;
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amdgcn*) echo "AMDGPU";;
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arc*) echo "ARC";;
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arm*) echo "ARM";;
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avr*) echo "AVR";;
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bpf*) echo "BPF";;
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csky*) echo "CSKY";;
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loong*) echo "LoongArch";;
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m68k*) echo "M68k";;
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mips*) echo "Mips";;
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msp430*) echo "MSP430";;
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nvptx*) echo "NVPTX";;
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powerpc*) echo "PowerPC";;
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riscv*) echo "RISCV";;
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sparc*) echo "Sparc";;
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s390*) echo "SystemZ";;
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x86_64*|i?86*) echo "X86";;
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xtensa*) echo "Xtensa";;
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*) die "Unknown LLVM target for tuple ${1:-${CHOST}}"
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esac
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}
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# @FUNCTION: llvm_fix_clang_version
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# @USAGE: <variable-name>...
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# @DESCRIPTION:
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# Fix the clang compiler name in specified variables to include
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# the major version, to prevent PATH alterations from forcing an older
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# clang version being used.
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llvm_fix_clang_version() {
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debug-print-function ${FUNCNAME} "${@}"
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local shopt_save=$(shopt -p -o noglob)
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set -f
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local var
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for var; do
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local split=( ${!var} )
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case ${split[0]} in
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*clang|*clang++|*clang-cpp)
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local version=()
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read -r -a version < <("${split[0]}" --version)
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local major=${version[-1]%%.*}
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if [[ -n ${major//[0-9]} ]]; then
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die "${var}=${!var} produced invalid --version: ${version[*]}"
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fi
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split[0]+=-${major}
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if ! type -P "${split[0]}" &>/dev/null; then
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die "${split[0]} does not seem to exist"
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fi
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declare -g "${var}=${split[*]}"
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;;
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esac
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done
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${shopt_save}
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}
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# @FUNCTION: llvm_fix_tool_path
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# @USAGE: <variable-name>...
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# @DESCRIPTION:
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# Fix the LLVM tools referenced in the specified variables to their
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# current location, to prevent PATH alterations from forcing older
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# versions being used.
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llvm_fix_tool_path() {
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debug-print-function ${FUNCNAME} "${@}"
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local shopt_save=$(shopt -p -o noglob)
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set -f
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local var
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for var; do
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local split=( ${!var} )
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local path=$(type -P ${split[0]} 2>/dev/null)
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# if it resides in one of the LLVM prefixes, it's an LLVM tool!
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if [[ ${path} == "${BROOT}/usr/lib/llvm"* ]]; then
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split[0]=${path}
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declare -g "${var}=${split[*]}"
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fi
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done
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${shopt_save}
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}
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# @FUNCTION: llvm_prepend_path
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# @USAGE: <slot>
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# @DESCRIPTION:
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# Prepend the path to the specified LLVM slot to PATH variable,
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# and reexport it.
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llvm_prepend_path() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -ne 1 ]] && die "Usage: ${FUNCNAME} <slot>"
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local slot=${1}
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local llvm_path=${ESYSROOT}/usr/lib/llvm/${slot}/bin
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local IFS=:
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local split_path=( ${PATH} )
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local new_path=()
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local x added=
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for x in "${split_path[@]}"; do
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if [[ ${x} == */usr/lib/llvm/*/bin ]]; then
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# prepend new path in front of the first LLVM version found
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if [[ ! ${added} ]]; then
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new_path+=( "${llvm_path}" )
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added=1
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fi
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# remove duplicate copies of the same path
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if [[ ${x} == ${llvm_path} ]]; then
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# deduplicate
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continue
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fi
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fi
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new_path+=( "${x}" )
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done
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# ...or to the end of PATH
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[[ ${added} ]] || new_path+=( "${llvm_path}" )
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export PATH=${new_path[*]}
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}
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fi
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