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# Copyright 1999-2013 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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# $Header: /var/cvsroot/gentoo-x86/eclass/multilib-build.eclass,v 1.11 2013/04/07 16:56:14 mgorny Exp $
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# @ECLASS: multilib-build.eclass
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# @MAINTAINER:
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# Michał Górny <mgorny@gentoo.org>
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# @BLURB: flags and utility functions for building multilib packages
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# @DESCRIPTION:
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# The multilib-build.eclass exports USE flags and utility functions
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# necessary to build packages for multilib in a clean and uniform
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# manner.
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#
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# Please note that dependency specifications for multilib-capable
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# dependencies shall use the USE dependency string in ${MULTILIB_USEDEP}
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# to properly request multilib enabled.
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if [[ ! ${_MULTILIB_BUILD} ]]; then
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# EAPI=4 is required for meaningful MULTILIB_USEDEP.
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case ${EAPI:-0} in
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4|5) ;;
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*) die "EAPI=${EAPI} is not supported" ;;
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esac
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inherit multibuild multilib
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# @ECLASS-VARIABLE: _MULTILIB_FLAGS
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# @INTERNAL
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# @DESCRIPTION:
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# The list of multilib flags and corresponding ABI values.
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_MULTILIB_FLAGS=(
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abi_x86_32:x86
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abi_x86_64:amd64
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abi_x86_x32:x32
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)
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# @ECLASS-VARIABLE: MULTILIB_USEDEP
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# @DESCRIPTION:
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# The USE-dependency to be used on dependencies (libraries) needing
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# to support multilib as well.
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#
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# Example use:
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# @CODE
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# RDEPEND="dev-libs/libfoo[${MULTILIB_USEDEP}]
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# net-libs/libbar[ssl,${MULTILIB_USEDEP}]"
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# @CODE
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_multilib_build_set_globals() {
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local flags=( "${_MULTILIB_FLAGS[@]%:*}" )
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local usedeps=${flags[@]/%/(-)?}
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IUSE=${flags[*]}
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MULTILIB_USEDEP=${usedeps// /,}
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}
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_multilib_build_set_globals
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# @FUNCTION: multilib_get_enabled_abis
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# @DESCRIPTION:
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# Return the ordered list of enabled ABIs if multilib builds
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# are enabled. The best (most preferred) ABI will come last.
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#
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# If multilib is disabled, the default ABI will be returned
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# in order to enforce consistent testing with multilib code.
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multilib_get_enabled_abis() {
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debug-print-function ${FUNCNAME} "${@}"
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local abis=( $(get_all_abis) )
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local abi i found
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for abi in "${abis[@]}"; do
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for i in "${_MULTILIB_FLAGS[@]}"; do
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local m_abi=${i#*:}
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local m_flag=${i%:*}
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if [[ ${m_abi} == ${abi} ]] && use "${m_flag}"; then
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echo "${abi}"
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found=1
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fi
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done
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done
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if [[ ! ${found} ]]; then
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# ${ABI} can be used to override the fallback (multilib-portage),
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# ${DEFAULT_ABI} is the safe fallback.
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local abi=${ABI:-${DEFAULT_ABI}}
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debug-print "${FUNCNAME}: no ABIs enabled, fallback to ${abi}"
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debug-print "${FUNCNAME}: ABI=${ABI}, DEFAULT_ABI=${DEFAULT_ABI}"
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echo ${abi}
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fi
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}
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# @FUNCTION: _multilib_multibuild_wrapper
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# @USAGE: <argv>...
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# @INTERNAL
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# @DESCRIPTION:
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# Initialize the environment for ABI selected for multibuild.
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_multilib_multibuild_wrapper() {
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debug-print-function ${FUNCNAME} "${@}"
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local ABI=${MULTIBUILD_VARIANT}
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multilib_toolchain_setup "${ABI}"
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"${@}"
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}
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# @FUNCTION: multilib_foreach_abi
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# @USAGE: <argv>...
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# @DESCRIPTION:
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# If multilib support is enabled, sets the toolchain up for each
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# supported ABI along with the ABI variable and correct BUILD_DIR,
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# and runs the given commands with them.
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#
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# If multilib support is disabled, it just runs the commands. No setup
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# is done.
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multilib_foreach_abi() {
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debug-print-function ${FUNCNAME} "${@}"
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local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abis) )
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multibuild_foreach_variant _multilib_multibuild_wrapper "${@}"
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}
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# @FUNCTION: multilib_parallel_foreach_abi
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# @USAGE: <argv>...
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# @DESCRIPTION:
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# If multilib support is enabled, sets the toolchain up for each
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# supported ABI along with the ABI variable and correct BUILD_DIR,
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# and runs the given commands with them. The commands are run
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# in parallel with number of jobs being determined from MAKEOPTS.
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#
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# If multilib support is disabled, it just runs the commands. No setup
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# is done.
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#
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# Useful for running configure scripts.
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multilib_parallel_foreach_abi() {
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debug-print-function ${FUNCNAME} "${@}"
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local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abis) )
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multibuild_parallel_foreach_variant _multilib_multibuild_wrapper "${@}"
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}
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# @FUNCTION: multilib_for_best_abi
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# @USAGE: <argv>...
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# @DESCRIPTION:
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# Runs the given command with setup for the 'best' (usually native) ABI.
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multilib_for_best_abi() {
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debug-print-function ${FUNCNAME} "${@}"
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local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abis) )
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multibuild_for_best_variant _multilib_multibuild_wrapper "${@}"
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}
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# @FUNCTION: multilib_check_headers
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# @DESCRIPTION:
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# Check whether the header files are consistent between ABIs.
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#
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# This function needs to be called after each ABI's installation phase.
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# It obtains the header file checksums and compares them with previous
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# runs (if any). Dies if header files differ.
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multilib_check_headers() {
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_multilib_header_cksum() {
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[[ -d ${ED}usr/include ]] && \
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find "${ED}"usr/include -type f \
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-exec cksum {} + | sort -k2
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}
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local cksum=$(_multilib_header_cksum)
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local cksum_file=${T}/.multilib_header_cksum
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if [[ -f ${cksum_file} ]]; then
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local cksum_prev=$(< "${cksum_file}")
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if [[ ${cksum} != ${cksum_prev} ]]; then
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echo "${cksum}" > "${cksum_file}.new"
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eerror "Header files have changed between ABIs."
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if type -p diff &>/dev/null; then
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eerror "$(diff -du "${cksum_file}" "${cksum_file}.new")"
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else
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eerror "Old checksums in: ${cksum_file}"
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eerror "New checksums in: ${cksum_file}.new"
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fi
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die "Header checksum mismatch, aborting."
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fi
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else
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echo "${cksum}" > "${cksum_file}"
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fi
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}
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# @FUNCTION: multilib_copy_sources
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# @DESCRIPTION:
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# Create a single copy of the package sources for each enabled ABI.
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#
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# The sources are always copied from initial BUILD_DIR (or S if unset)
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# to ABI-specific build directory matching BUILD_DIR used by
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# multilib_foreach_abi().
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multilib_copy_sources() {
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debug-print-function ${FUNCNAME} "${@}"
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local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abis) )
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multibuild_copy_sources
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}
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# @ECLASS-VARIABLE: MULTILIB_WRAPPED_HEADERS
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# @DESCRIPTION:
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# A list of headers to wrap for multilib support. The listed headers
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# will be moved to a non-standard location and replaced with a file
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# including them conditionally to current ABI.
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#
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# This variable has to be a bash array. Paths shall be relative to
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# installation root (${ED}), and name regular files. Recursive wrapping
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# is not supported.
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#
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# Please note that header wrapping is *discouraged*. It is preferred to
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# install all headers in a subdirectory of libdir and use pkg-config to
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# locate the headers. Some C preprocessors will not work with wrapped
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# headers.
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#
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# Example:
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# @CODE
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# MULTILIB_WRAPPED_HEADERS=(
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# /usr/include/foobar/config.h
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# )
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# @CODE
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# @FUNCTION: multilib_prepare_wrappers
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# @USAGE: [<install-root>]
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# @DESCRIPTION:
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# Perform the preparation of all kinds of wrappers for the current ABI.
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# This function shall be called once per each ABI, after installing
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# the files to be wrapped.
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#
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# Takes an optional custom <install-root> from which files will be
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# used. If no root is specified, uses ${ED}.
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#
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# The files to be wrapped are specified using separate variables,
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# e.g. MULTILIB_WRAPPED_HEADERS. Those variables shall not be changed
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# between the successive calls to multilib_prepare_wrappers
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# and multilib_install_wrappers.
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#
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# After all wrappers are prepared, multilib_install_wrappers shall
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# be called to commit them to the installation tree.
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multilib_prepare_wrappers() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -le 1 ]] || die "${FUNCNAME}: too many arguments"
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local root=${1:-${ED}}
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local f
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for f in "${MULTILIB_WRAPPED_HEADERS[@]}"; do
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# drop leading slash if it's there
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f=${f#/}
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if [[ ${f} != usr/include/* ]]; then
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die "Wrapping headers outside of /usr/include is not supported at the moment."
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fi
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# and then usr/include
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f=${f#usr/include}
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local dir=${f%/*}
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# $CHOST shall be set by multilib_toolchain_setup
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dodir "/tmp/multilib-include/${CHOST}${dir}"
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mv "${root}/usr/include${f}" "${ED}/tmp/multilib-include/${CHOST}${dir}/" || die
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if [[ ! -f ${ED}/tmp/multilib-include${f} ]]; then
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dodir "/tmp/multilib-include${dir}"
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# a generic template
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cat > "${ED}/tmp/multilib-include${f}" <<_EOF_ || die
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/* This file is auto-generated by multilib-build.eclass
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* as a multilib-friendly wrapper. For the original content,
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* please see the files that are #included below.
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*/
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#if defined(__x86_64__) /* amd64 */
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# if defined(__ILP32__) /* x32 ABI */
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# error "abi_x86_x32 not supported by the package."
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# else /* 64-bit ABI */
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# error "abi_x86_64 not supported by the package."
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# endif
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#elif defined(__i386__) /* plain x86 */
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# error "abi_x86_32 not supported by the package."
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#else
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# error "No ABI matched, please report a bug to bugs.gentoo.org"
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#endif
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_EOF_
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fi
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# XXX: get abi_* directly
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local abi_flag
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case "${ABI}" in
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amd64)
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abi_flag=abi_x86_64;;
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x86)
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abi_flag=abi_x86_32;;
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x32)
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abi_flag=abi_x86_x32;;
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*)
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die "Header wrapping for ${ABI} not supported yet";;
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esac
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# Note: match a space afterwards to avoid collision potential.
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sed -e "/${abi_flag} /s&error.*&include <${CHOST}/${f}>&" \
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-i "${ED}/tmp/multilib-include${f}" || die
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done
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}
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# @FUNCTION: multilib_install_wrappers
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# @USAGE: [<install-root>]
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# @DESCRIPTION:
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# Install the previously-prepared wrappers. This function shall
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# be called once, after all wrappers were prepared.
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#
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# Takes an optional custom <install-root> to which the wrappers will be
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# installed. If no root is specified, uses ${ED}. There is no need to
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# use the same root as when preparing the wrappers.
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#
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# The files to be wrapped are specified using separate variables,
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# e.g. MULTILIB_WRAPPED_HEADERS. Those variables shall not be changed
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# between the calls to multilib_prepare_wrappers
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# and multilib_install_wrappers.
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multilib_install_wrappers() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -le 1 ]] || die "${FUNCNAME}: too many arguments"
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local root=${1:-${ED}}
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if [[ -d "${ED}"/tmp/multilib-include ]]; then
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multibuild_merge_root \
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"${ED}"/tmp/multilib-include "${root}"/usr/include
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# it can fail if something else uses /tmp
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rmdir "${ED}"/tmp &>/dev/null
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fi
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}
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_MULTILIB_BUILD=1
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fi
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