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eclass/llvm-r1: Add from Gentoo
It's from Gentoo commit 5618de75aec49009489efb560a89e014fd060524.
This commit is contained in:
Krzesimir Nowak
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b9be2e4035
commit
b5ca97a76b
250
sdk_container/src/third_party/portage-stable/eclass/llvm-r1.eclass
vendored
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250
sdk_container/src/third_party/portage-stable/eclass/llvm-r1.eclass
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# 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-r1.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: 8
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# @PROVIDES: llvm-utils
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# @BLURB: Provide LLVM_SLOT to build against slotted LLVM
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# @DESCRIPTION:
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# An eclass to reliably depend on a set of LLVM-related packages
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# in a matching slot. To use the eclass:
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#
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# 1. Set LLVM_COMPAT to the list of supported LLVM slots.
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# 2. Use llvm_gen_dep and/or LLVM_USEDEP to add appropriate
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# dependencies.
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# 3. Use llvm-r1_pkg_setup, get_llvm_prefix or LLVM_SLOT.
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#
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# The eclass sets IUSE and REQUIRED_USE. The flag corresponding
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# to the newest supported stable LLVM slot (or the newest testing,
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# if no stable slots are supported) is enabled by default.
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#
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# Example:
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# @CODE
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# LLVM_COMPAT=( {16..18} )
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#
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# inherit llvm-r1
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#
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# DEPEND="
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# dev-libs/libfoo[${LLVM_USEDEP}]
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# $(llvm_gen_dep '
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# sys-devel/clang:${LLVM_SLOT}
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# sys-devel/llvm:${LLVM_SLOT}
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# ')
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# "
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# @CODE
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case ${EAPI} in
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8) ;;
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*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
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esac
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if [[ ! ${_LLVM_R1_ECLASS} ]]; then
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_LLVM_R1_ECLASS=1
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inherit llvm-utils
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# == internal control knobs ==
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# @ECLASS_VARIABLE: _LLVM_OLDEST_SLOT
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# @INTERNAL
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# @DESCRIPTION:
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# Oldest supported LLVM slot. This is used to automatically filter out
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# unsupported LLVM_COMPAT values.
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_LLVM_OLDEST_SLOT=15
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# @ECLASS_VARIABLE: _LLVM_NEWEST_STABLE
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# @INTERNAL
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# @DESCRIPTION:
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# The newest stable LLVM version. Versions newer than that won't
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# be automatically enabled via USE defaults.
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_LLVM_NEWEST_STABLE=17
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# == control variables ==
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# @ECLASS_VARIABLE: LLVM_COMPAT
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# @PRE_INHERIT
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# @REQUIRED
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# @DESCRIPTION:
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# A list of LLVM slots supported by the package, oldest to newest.
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#
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# Example:
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# @CODE
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# LLVM_COMPAT=( {15..17} )
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# @CODE
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# @ECLASS_VARIABLE: LLVM_OPTIONAL
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# @PRE_INHERIT
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# @DEFAULT_UNSET
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# @DESCRIPTION:
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# If set to a non-empty value, disables setting REQUIRED_USE
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# and exporting pkg_setup. You have to add LLVM_REQUIRED_USE and call
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# pkg_setup manually, with appropriate USE conditions.
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# == global metadata ==
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# @ECLASS_VARIABLE: LLVM_REQUIRED_USE
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# @OUTPUT_VARIABLE
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# @DESCRIPTION:
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# An eclass-generated REQUIRED_USE string that enforces selecting
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# exactly one slot. It LLVM_OPTIONAL is set, it needs to be copied
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# into REQUIRED_USE, under appropriate USE conditions. Otherwise,
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# it is added automatically.
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# @ECLASS_VARIABLE: LLVM_USEDEP
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# @OUTPUT_VARIABLE
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# @DESCRIPTION:
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# An eclass-generated USE dependency string that can be applied to other
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# packages using the same eclass, to enforce a LLVM slot match.
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_llvm_set_globals() {
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debug-print-function ${FUNCNAME} "${@}"
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if [[ ${LLVM_COMPAT@a} != *a* ]]; then
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die "LLVM_COMPAT must be set to an array before inheriting ${ECLASS}"
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fi
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local stable=() unstable=()
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local x
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for x in "${LLVM_COMPAT[@]}"; do
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if [[ ${x} -gt ${_LLVM_NEWEST_STABLE} ]]; then
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unstable+=( "${x}" )
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elif [[ ${x} -ge ${_LLVM_OLDEST_SLOT} ]]; then
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stable+=( "${x}" )
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fi
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done
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_LLVM_SLOTS=( "${stable[@]}" "${unstable[@]}" )
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if [[ ! ${_LLVM_SLOTS[@]} ]]; then
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die "LLVM_COMPAT does not contain any valid versions (all older than ${_LLVM_OLDEST_SLOT}?)"
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fi
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if [[ ${stable[@]} ]]; then
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IUSE="+llvm_slot_${stable[-1]}"
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unset 'stable[-1]'
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else
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IUSE="+llvm_slot_${unstable[-1]}"
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unset 'unstable[-1]'
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fi
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local nondefault=( "${stable[@]}" "${unstable[@]}" )
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IUSE+=" ${nondefault[*]/#/llvm_slot_}"
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local flags=( "${_LLVM_SLOTS[@]/#/llvm_slot_}" )
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LLVM_REQUIRED_USE="^^ ( ${flags[*]} )"
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local usedep_flags=${flags[*]/%/(-)?}
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LLVM_USEDEP=${usedep_flags// /,}
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readonly LLVM_REQUIRED_USE LLVM_USEDEP
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if [[ ! ${LLVM_OPTIONAL} ]]; then
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REQUIRED_USE=${LLVM_REQUIRED_USE}
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fi
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}
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_llvm_set_globals
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unset -f _llvm_set_globals
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# == metadata helpers ==
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# @FUNCTION: llvm_gen_dep
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# @USAGE: <dependency>
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# @DESCRIPTION:
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# Output a dependency block, repeating "<dependency>" conditionally
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# to all llvm_slot_* USE flags. Any occurences of '${LLVM_SLOT}'
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# within the block will be substituted for the respective slot.
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#
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# Example:
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# @CODE
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# DEPEND="
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# $(llvm_gen_dep '
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# sys-devel/clang:${LLVM_SLOT}
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# sys-devel/llvm:${LLVM_SLOT}
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# ')
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# "
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# @CODE
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llvm_gen_dep() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -ne 1 ]] && die "Usage: ${FUNCNAME} <dependency>"
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local dep=${1}
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local slot
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for slot in "${_LLVM_SLOTS[@]}"; do
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echo "llvm_slot_${slot}? ( ${dep//\$\{LLVM_SLOT\}/${slot}} )"
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done
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}
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# == ebuild helpers ==
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# @FUNCTION: get_llvm_prefix
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# @USAGE: [-b|-d]
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# @DESCRIPTION:
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# Output the path to the selected LLVM slot.
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#
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# With no option or "-d", the path is prefixed by ESYSROOT. LLVM
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# dependencies should be in DEPEND then.
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#
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# With "-b" option, the path is prefixed by BROOT. LLVM dependencies
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# should be in BDEPEND then.
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get_llvm_prefix() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -gt 1 ]] && die "Usage: ${FUNCNAME} [-b|-d]"
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local prefix
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case ${1--d} in
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-d)
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prefix=${ESYSROOT}
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;;
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-b)
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prefix=${BROOT}
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;;
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*)
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die "${FUNCNAME}: invalid option: ${1}"
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;;
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esac
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echo "${prefix}/usr/lib/llvm/${LLVM_SLOT}"
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}
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# @FUNCTION: llvm-r1_pkg_setup
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# @DESCRIPTION:
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# Prepend the appropriate executable directory for the selected LLVM
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# slot to PATH.
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#
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# The PATH manipulation is only done for source builds. The function
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# is a no-op when installing a binary package.
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#
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# If any other behavior is desired, the contents of the function
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# should be inlined into the ebuild and modified as necessary.
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#
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# Note that this function is not exported if LLVM_OPTIONAL is set.
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# In that case, it needs to be called manually.
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llvm-r1_pkg_setup() {
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debug-print-function ${FUNCNAME} "${@}"
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if [[ ${MERGE_TYPE} != binary ]]; then
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[[ -z ${LLVM_SLOT} ]] && die "LLVM_SLOT unset (broken USE_EXPAND?)"
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llvm_fix_clang_version CC CPP CXX
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# keep in sync with profiles/features/llvm/make.defaults!
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llvm_fix_tool_path ADDR2LINE AR AS LD NM OBJCOPY OBJDUMP RANLIB
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llvm_fix_tool_path READELF STRINGS STRIP
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# Set LLVM_CONFIG to help Meson (bug #907965) but only do it
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# for empty ESYSROOT (as a proxy for "are we cross-compiling?").
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if [[ -z ${ESYSROOT} ]] ; then
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llvm_fix_tool_path LLVM_CONFIG
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fi
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llvm_prepend_path "${LLVM_SLOT}"
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fi
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}
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fi
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if [[ ! ${LLVM_OPTIONAL} ]]; then
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EXPORT_FUNCTIONS pkg_setup
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fi
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