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# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/multilib-build.eclass,v 1.2 2013/02/10 11:44:00 mgorny Exp $
# @ECLASS: multilib-build.eclass
# @MAINTAINER:
# Michał Górny <mgorny@gentoo.org>
# @BLURB: flags and utility functions for building multilib packages
# @DESCRIPTION:
# The multilib-build.eclass exports USE flags and utility functions
# necessary to build packages for multilib in a clean and uniform
# manner.
#
# Please note that dependency specifications for multilib-capable
# dependencies shall use the USE dependency string in ${MULTILIB_USEDEP}
# to properly request multilib enabled.
if [[ ! ${_MULTILIB_BUILD} ]]; then
# EAPI=5 is required for meaningful MULTILIB_USEDEP.
case ${EAPI:-0} in
5) ;;
*) die "EAPI=${EAPI} is not supported" ;;
esac
inherit multilib multiprocessing
# @ECLASS-VARIABLE: _MULTILIB_FLAGS
# @INTERNAL
# @DESCRIPTION:
# The list of multilib flags and corresponding ABI values.
_MULTILIB_FLAGS=(
abi_x86_32:x86
abi_x86_64:amd64
)
# @ECLASS-VARIABLE: MULTILIB_USEDEP
# @DESCRIPTION:
# The USE-dependency to be used on dependencies (libraries) needing
# to support multilib as well.
#
# Example use:
# @CODE
# RDEPEND="dev-libs/libfoo[${MULTILIB_USEDEP}]
# net-libs/libbar[ssl,${MULTILIB_USEDEP}]"
# @CODE
_multilib_build_set_globals() {
local flags=( "${_MULTILIB_FLAGS[@]%:*}" )
local usedeps=${flags[@]/%/(-)?}
IUSE=${flags[*]}
MULTILIB_USEDEP=${usedeps// /,}
}
_multilib_build_set_globals
# @FUNCTION: multilib_get_enabled_abis
# @DESCRIPTION:
# Return the ordered list of enabled ABIs if multilib builds
# are enabled. The best (most preferred) ABI will come last.
#
# If multilib is disabled, the default ABI will be returned
# in order to enforce consistent testing with multilib code.
multilib_get_enabled_abis() {
debug-print-function ${FUNCNAME} "${@}"
local abis=( $(get_all_abis) )
local abi i found
for abi in "${abis[@]}"; do
for i in "${_MULTILIB_FLAGS[@]}"; do
local m_abi=${i#*:}
local m_flag=${i%:*}
if [[ ${m_abi} == ${abi} ]] && use "${m_flag}"; then
echo "${abi}"
found=1
fi
done
done
if [[ ! ${found} ]]; then
debug-print "${FUNCNAME}: no ABIs enabled, fallback to ${DEFAULT_ABI}"
echo ${DEFAULT_ABI}
fi
}
# @FUNCTION: multilib_foreach_abi
# @USAGE: <argv>...
# @DESCRIPTION:
# If multilib support is enabled, sets the toolchain up for each
# supported ABI along with the ABI variable and correct BUILD_DIR,
# and runs the given commands with them.
#
# If multilib support is disabled, it just runs the commands. No setup
# is done.
multilib_foreach_abi() {
local initial_dir=${BUILD_DIR:-${S}}
local ABI
for ABI in $(multilib_get_enabled_abis); do
multilib_toolchain_setup "${ABI}"
BUILD_DIR=${initial_dir%%/}-${ABI} "${@}"
done
}
# @FUNCTION: multilib_parallel_foreach_abi
# @USAGE: <argv>...
# @DESCRIPTION:
# If multilib support is enabled, sets the toolchain up for each
# supported ABI along with the ABI variable and correct BUILD_DIR,
# and runs the given commands with them. The commands are run
# in parallel with number of jobs being determined from MAKEOPTS.
#
# If multilib support is disabled, it just runs the commands. No setup
# is done.
#
# Useful for running configure scripts.
multilib_parallel_foreach_abi() {
local initial_dir=${BUILD_DIR:-${S}}
multijob_init
local ABI
for ABI in $(multilib_get_enabled_abis); do
(
multijob_child_init
multilib_toolchain_setup "${ABI}"
BUILD_DIR=${initial_dir%%/}-${ABI}
"${@}"
) &
multijob_post_fork
done
multijob_finish
}
# @FUNCTION: multilib_check_headers
# @DESCRIPTION:
# Check whether the header files are consistent between ABIs.
#
# This function needs to be called after each ABI's installation phase.
# It obtains the header file checksums and compares them with previous
# runs (if any). Dies if header files differ.
multilib_check_headers() {
_multilib_header_cksum() {
find "${ED}"usr/include -type f \
-exec cksum {} + | sort -k2
}
local cksum=$(_multilib_header_cksum)
local cksum_file=${T}/.multilib_header_cksum
if [[ -f ${cksum_file} ]]; then
local cksum_prev=$(< "${cksum_file}")
if [[ ${cksum} != ${cksum_prev} ]]; then
echo "${cksum}" > "${cksum_file}.new"
eerror "Header files have changed between ABIs."
if type -p diff &>/dev/null; then
eerror "$(diff -du "${cksum_file}" "${cksum_file}.new")"
else
eerror "Old checksums in: ${cksum_file}"
eerror "New checksums in: ${cksum_file}.new"
fi
die "Header checksum mismatch, aborting."
fi
else
echo "${cksum}" > "${cksum_file}"
fi
}
_MULTILIB_BUILD=1
fi
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